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org.apache.commons.jelly.parser.XMLParser |
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1 | /* |
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2 | * Copyright 2002,2004 The Apache Software Foundation. |
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3 | * |
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4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | * you may not use this file except in compliance with the License. |
|
6 | * You may obtain a copy of the License at |
|
7 | * |
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8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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9 | * |
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10 | * Unless required by applicable law or agreed to in writing, software |
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11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
13 | * See the License for the specific language governing permissions and |
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14 | * limitations under the License. |
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15 | */ |
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16 | package org.apache.commons.jelly.parser; |
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17 | ||
18 | import java.io.File; |
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19 | import java.io.InputStream; |
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20 | import java.io.IOException; |
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21 | import java.io.Reader; |
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22 | import java.net.URL; |
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23 | import java.util.ArrayList; |
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24 | import java.util.EmptyStackException; |
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25 | import java.util.HashMap; |
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26 | import java.util.Iterator; |
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27 | import java.util.Map; |
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28 | import java.util.Properties; |
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29 | ||
30 | import javax.xml.parsers.SAXParser; |
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31 | import javax.xml.parsers.SAXParserFactory; |
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32 | ||
33 | import org.apache.commons.collections.ArrayStack; |
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34 | ||
35 | import org.apache.commons.jelly.JellyContext; |
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36 | import org.apache.commons.jelly.JellyException; |
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37 | import org.apache.commons.jelly.Script; |
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38 | import org.apache.commons.jelly.Tag; |
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39 | import org.apache.commons.jelly.TagLibrary; |
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40 | import org.apache.commons.jelly.impl.CompositeTextScriptBlock; |
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41 | import org.apache.commons.jelly.impl.ExpressionScript; |
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42 | import org.apache.commons.jelly.impl.StaticTag; |
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43 | import org.apache.commons.jelly.impl.ScriptBlock; |
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44 | import org.apache.commons.jelly.impl.StaticTagScript; |
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45 | import org.apache.commons.jelly.impl.TagFactory; |
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46 | import org.apache.commons.jelly.impl.TagScript; |
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47 | import org.apache.commons.jelly.impl.TextScript; |
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48 | import org.apache.commons.jelly.util.ClassLoaderUtils; |
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49 | import org.apache.commons.jelly.expression.CompositeExpression; |
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50 | import org.apache.commons.jelly.expression.ConstantExpression; |
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51 | import org.apache.commons.jelly.expression.Expression; |
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52 | import org.apache.commons.jelly.expression.ExpressionFactory; |
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53 | import org.apache.commons.jelly.expression.jexl.JexlExpressionFactory; |
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54 | ||
55 | import org.apache.commons.logging.Log; |
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56 | import org.apache.commons.logging.LogFactory; |
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57 | ||
58 | import org.xml.sax.Attributes; |
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59 | import org.xml.sax.ErrorHandler; |
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60 | import org.xml.sax.helpers.DefaultHandler; |
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61 | import org.xml.sax.InputSource; |
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62 | import org.xml.sax.Locator; |
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63 | import org.xml.sax.SAXException; |
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64 | import org.xml.sax.SAXParseException; |
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65 | import org.xml.sax.XMLReader; |
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66 | import org.xml.sax.helpers.AttributesImpl; |
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67 | ||
68 | /** <p><code>XMLParser</code> parses the XML Jelly format. |
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69 | * The SAXParser and XMLReader portions of this code come from Digester.</p> |
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70 | * |
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71 | * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
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72 | * @version $Revision: 155420 $ |
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73 | */ |
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74 | public class XMLParser extends DefaultHandler { |
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75 | ||
76 | /** |
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77 | * Share the Jelly properties across parsers |
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78 | */ |
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79 | private static Properties jellyProperties; |
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80 | ||
81 | ||
82 | /** JellyContext which is used to locate tag libraries*/ |
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83 | 1027 | private JellyContext context = new JellyContext(); |
84 | ||
85 | /** the expression factory used to evaluate tag attributes */ |
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86 | private ExpressionFactory expressionFactory; |
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87 | ||
88 | /** The current script block */ |
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89 | private ScriptBlock script; |
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90 | ||
91 | /** The current, parent tagScript */ |
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92 | private TagScript tagScript; |
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93 | ||
94 | /** The stack of body scripts. */ |
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95 | 1027 | private ArrayStack scriptStack = new ArrayStack(); |
96 | ||
97 | /** The stack of tagScripts - use ArrayList as it allows null. */ |
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98 | 1027 | private ArrayList tagScriptStack = new ArrayList(); |
99 | ||
100 | /** The current text buffer where non-custom tags get written */ |
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101 | private StringBuffer textBuffer; |
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102 | ||
103 | /** |
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104 | * The class loader to use for instantiating application objects. |
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105 | * If not specified, the context class loader, or the class loader |
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106 | * used to load XMLParser itself, is used, based on the value of the |
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107 | * <code>useContextClassLoader</code> variable. |
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108 | */ |
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109 | 1027 | protected ClassLoader classLoader = null; |
110 | ||
111 | /** |
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112 | * Do we want to use the Context ClassLoader when loading classes |
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113 | * for instantiating new objects? Default is <code>false</code>. |
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114 | */ |
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115 | 1027 | protected boolean useContextClassLoader = false; |
116 | ||
117 | /** |
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118 | * The application-supplied error handler that is notified when parsing |
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119 | * warnings, errors, or fatal errors occur. |
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120 | */ |
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121 | 1027 | protected ErrorHandler errorHandler = null; |
122 | ||
123 | /** |
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124 | * The SAXParserFactory that is created the first time we need it. |
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125 | */ |
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126 | 273 | protected static SAXParserFactory factory = null; |
127 | ||
128 | /** |
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129 | * The SAXParser we will use to parse the input stream. |
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130 | */ |
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131 | 1027 | protected SAXParser parser = null; |
132 | ||
133 | /** |
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134 | * The XMLReader used to parse digester rules. |
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135 | */ |
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136 | 1027 | protected XMLReader reader = null; |
137 | ||
138 | /** |
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139 | * The Locator associated with our parser. |
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140 | */ |
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141 | 1027 | protected Locator locator = null; |
142 | ||
143 | /** |
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144 | * Registered namespaces we are currently processing. The key is the |
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145 | * namespace prefix that was declared in the document. The value is an |
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146 | * ArrayStack of the namespace URIs this prefix has been mapped to -- |
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147 | * the top Stack element is the most current one. (This architecture |
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148 | * is required because documents can declare nested uses of the same |
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149 | * prefix for different Namespace URIs). |
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150 | */ |
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151 | 1027 | protected Map namespaces = new HashMap(); |
152 | ||
153 | /** The Map of the namespace prefix -> URIs defined for the current element */ |
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154 | private Map elementNamespaces; |
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155 | ||
156 | /** |
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157 | * The name of the file being parsed that is passed to the TagScript objects |
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158 | * for error reporting |
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159 | */ |
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160 | private String fileName; |
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161 | ||
162 | /** |
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163 | * Do we want to use a validating parser? |
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164 | */ |
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165 | 1027 | protected boolean validating = false; |
166 | ||
167 | /** Flag to indicate if this object has been configured */ |
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168 | private boolean configured; |
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169 | ||
170 | /** |
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171 | * when not null, set the default namespace for |
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172 | * unprefixed elements via the DefaultNamespaceFilter |
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173 | * class |
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174 | */ |
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175 | 1027 | private String defaultNamespaceURI = null; |
176 | ||
177 | /** |
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178 | * The Log to which logging calls will be made. |
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179 | */ |
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180 | 1300 | private Log log = LogFactory.getLog(XMLParser.class); |
181 | ||
182 | /** |
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183 | * Construct a new XMLParser with default properties. |
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184 | */ |
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185 | 1027 | public XMLParser() { |
186 | 1027 | } |
187 | ||
188 | /** |
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189 | * Construct a new XMLParser, allowing a SAXParser to be passed in. This |
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190 | * allows XMLParser to be used in environments which are unfriendly to |
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191 | * JAXP1.1 (such as WebLogic 6.0). Thanks for the request to change go to |
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192 | * James House (james@interobjective.com). This may help in places where |
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193 | * you are able to load JAXP 1.1 classes yourself. |
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194 | */ |
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195 | 0 | public XMLParser(SAXParser parser) { |
196 | 0 | this.parser = parser; |
197 | 0 | } |
198 | ||
199 | /** |
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200 | * Construct a new XMLParser, allowing an XMLReader to be passed in. This |
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201 | * allows XMLParser to be used in environments which are unfriendly to |
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202 | * JAXP1.1 (such as WebLogic 6.0). Note that if you use this option you |
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203 | * have to configure namespace and validation support yourself, as these |
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204 | * properties only affect the SAXParser and emtpy constructor. |
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205 | */ |
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206 | 0 | public XMLParser(XMLReader reader) { |
207 | 0 | this.reader = reader; |
208 | 0 | } |
209 | ||
210 | /** |
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211 | * Parse the content of the specified file using this XMLParser. Returns |
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212 | * the root element from the object stack (if any). |
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213 | * |
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214 | * @param file File containing the XML data to be parsed |
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215 | * |
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216 | * @exception IOException if an input/output error occurs |
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217 | * @exception SAXException if a parsing exception occurs |
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218 | */ |
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219 | public Script parse(File file) throws IOException, SAXException { |
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220 | 0 | return parse(file.toURL()); |
221 | } |
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222 | ||
223 | /** |
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224 | * Parse the content of the specified file using this XMLParser. Returns |
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225 | * the root element from the object stack (if any). |
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226 | * |
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227 | * @param url URL containing the XML data to be parsed |
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228 | * |
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229 | * @exception IOException if an input/output error occurs |
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230 | * @exception SAXException if a parsing exception occurs |
|
231 | */ |
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232 | public Script parse(URL url) throws IOException, SAXException { |
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233 | 845 | ensureConfigured(); |
234 | 845 | this.fileName = url.toString(); |
235 | ||
236 | 845 | InputSource source = new InputSource(url.toString()); |
237 | ||
238 | 845 | getXMLReader().parse(source); |
239 | 806 | return script; |
240 | } |
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241 | ||
242 | /** |
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243 | * Parse the content of the specified input source using this XMLParser. |
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244 | * Returns the root element from the object stack (if any). |
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245 | * |
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246 | * @param input Input source containing the XML data to be parsed |
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247 | * |
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248 | * @exception IOException if an input/output error occurs |
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249 | * @exception SAXException if a parsing exception occurs |
|
250 | */ |
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251 | public Script parse(InputSource input) throws IOException, SAXException { |
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252 | 130 | ensureConfigured(); |
253 | 130 | this.fileName = input.getSystemId(); |
254 | 130 | getXMLReader().parse(input); |
255 | 130 | return script; |
256 | } |
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257 | ||
258 | /** |
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259 | * Parse the content of the specified input stream using this XMLParser. |
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260 | * Returns the root element from the object stack (if any). |
|
261 | * (Note: if reading a File or URL, use one of the URL-based |
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262 | * parse methods instead. This method will not be able |
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263 | * to resolve any relative paths inside a DTD.) |
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264 | * |
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265 | * @param input Input stream containing the XML data to be parsed |
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266 | * @return |
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267 | * @exception IOException |
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268 | * if an input/output error occurs |
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269 | * @exception SAXException |
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270 | * if a parsing exception occurs |
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271 | */ |
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272 | public Script parse(InputStream input) throws IOException, SAXException { |
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273 | 52 | ensureConfigured(); |
274 | 52 | this.fileName = getCurrentURI(); |
275 | 52 | getXMLReader().parse(new InputSource(input)); |
276 | 39 | return script; |
277 | } |
|
278 | ||
279 | /** |
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280 | * Parse the content of the specified reader using this XMLParser. |
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281 | * Returns the root element from the object stack (if any). |
|
282 | * (Note: if reading a File or URL, use one of the URL-based |
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283 | * parse methods instead. This method will not be able |
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284 | * to resolve any relative paths inside a DTD.) |
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285 | * |
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286 | * @param reader Reader containing the XML data to be parsed |
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287 | * @return |
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288 | * @exception IOException |
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289 | * if an input/output error occurs |
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290 | * @exception SAXException |
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291 | * if a parsing exception occurs |
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292 | */ |
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293 | public Script parse(Reader reader) throws IOException, SAXException { |
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294 | 0 | ensureConfigured(); |
295 | 0 | this.fileName = getCurrentURI(); |
296 | 0 | getXMLReader().parse(new InputSource(reader)); |
297 | 0 | return script; |
298 | } |
|
299 | ||
300 | /** |
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301 | * Parse the content of the specified URI using this XMLParser. |
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302 | * Returns the root element from the object stack (if any). |
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303 | * |
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304 | * @param uri URI containing the XML data to be parsed |
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305 | * |
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306 | * @exception IOException if an input/output error occurs |
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307 | * @exception SAXException if a parsing exception occurs |
|
308 | */ |
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309 | public Script parse(String uri) throws IOException, SAXException { |
|
310 | 0 | ensureConfigured(); |
311 | 0 | this.fileName = uri; |
312 | 0 | getXMLReader().parse(uri); |
313 | 0 | return script; |
314 | } |
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315 | ||
316 | /** |
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317 | * Return the currently mapped namespace URI for the specified prefix, |
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318 | * if any; otherwise return <code>null</code>. These mappings come and |
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319 | * go dynamically as the document is parsed. |
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320 | * |
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321 | * @param prefix Prefix to look up |
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322 | */ |
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323 | public String findNamespaceURI(String prefix) { |
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324 | 0 | ArrayStack stack = (ArrayStack) namespaces.get(prefix); |
325 | 0 | if (stack == null) { |
326 | 0 | return (null); |
327 | } |
|
328 | try { |
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329 | 0 | return ((String) stack.peek()); |
330 | } |
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331 | 0 | catch (EmptyStackException e) { |
332 | 0 | return (null); |
333 | } |
|
334 | } |
|
335 | ||
336 | // Properties |
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337 | //------------------------------------------------------------------------- |
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338 | public JellyContext getContext() { |
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339 | 52 | return context; |
340 | } |
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341 | ||
342 | public void setContext(JellyContext context) { |
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343 | 1014 | this.context = context; |
344 | 1014 | } |
345 | ||
346 | /** |
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347 | * Set the jelly namespace to use for unprefixed elements. |
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348 | * Will be overridden by an explicit namespace in the |
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349 | * XML document. |
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350 | * |
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351 | * @param namespace jelly namespace to use (e.g. 'jelly:core') |
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352 | */ |
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353 | public void setDefaultNamespaceURI(String namespace) { |
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354 | 845 | this.defaultNamespaceURI = namespace; |
355 | 845 | } |
356 | ||
357 | /** |
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358 | * Return the class loader to be used for instantiating application objects |
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359 | * when required. This is determined based upon the following rules: |
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360 | * <ul> |
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361 | * <li>The class loader set by <code>setClassLoader()</code>, if any</li> |
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362 | * <li>The thread context class loader, if it exists and the |
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363 | * <code>useContextClassLoader</code> property is set to true</li> |
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364 | * <li>The class loader used to load the XMLParser class itself. |
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365 | * </ul> |
|
366 | */ |
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367 | public ClassLoader getClassLoader() { |
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368 | 338 | return ClassLoaderUtils.getClassLoader(classLoader, useContextClassLoader, getClass()); |
369 | } |
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370 | ||
371 | /** |
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372 | * Set the class loader to be used for instantiating application objects |
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373 | * when required. |
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374 | * |
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375 | * @param classLoader The new class loader to use, or <code>null</code> |
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376 | * to revert to the standard rules |
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377 | */ |
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378 | public void setClassLoader(ClassLoader classLoader) { |
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379 | 0 | this.classLoader = classLoader; |
380 | 0 | } |
381 | ||
382 | /** |
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383 | * Return the boolean as to whether the context classloader should be used. |
|
384 | */ |
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385 | public boolean getUseContextClassLoader() { |
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386 | 0 | return useContextClassLoader; |
387 | } |
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388 | ||
389 | /** |
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390 | * Determine whether to use the Context ClassLoader (the one found by |
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391 | * calling <code>Thread.currentThread().getContextClassLoader()</code>) |
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392 | * to resolve/load classes. If not |
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393 | * using Context ClassLoader, then the class-loading defaults to |
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394 | * using the calling-class' ClassLoader. |
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395 | * |
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396 | * @param use determines whether to use JellyContext ClassLoader. |
|
397 | */ |
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398 | public void setUseContextClassLoader(boolean use) { |
|
399 | 0 | useContextClassLoader = use; |
400 | 0 | } |
401 | ||
402 | /** |
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403 | * Return the error handler for this XMLParser. |
|
404 | */ |
|
405 | public ErrorHandler getErrorHandler() { |
|
406 | 0 | return (this.errorHandler); |
407 | } |
|
408 | ||
409 | /** |
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410 | * Set the error handler for this XMLParser. |
|
411 | * |
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412 | * @param errorHandler The new error handler |
|
413 | */ |
|
414 | public void setErrorHandler(ErrorHandler errorHandler) { |
|
415 | 0 | this.errorHandler = errorHandler; |
416 | 0 | } |
417 | ||
418 | /** |
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419 | * Return the current Logger associated with this instance of the XMLParser |
|
420 | */ |
|
421 | public Log getLogger() { |
|
422 | 0 | return log; |
423 | } |
|
424 | ||
425 | /** |
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426 | * Set the current logger for this XMLParser. |
|
427 | */ |
|
428 | public void setLogger(Log log) { |
|
429 | 0 | this.log = log; |
430 | 0 | } |
431 | ||
432 | /** @return the expression factory used to evaluate tag attributes */ |
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433 | public ExpressionFactory getExpressionFactory() { |
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434 | 53495 | if (expressionFactory == null) { |
435 | 1001 | expressionFactory = createExpressionFactory(); |
436 | } |
|
437 | 53495 | return expressionFactory; |
438 | } |
|
439 | ||
440 | /** Sets the expression factory used to evaluate tag attributes */ |
|
441 | public void setExpressionFactory(ExpressionFactory expressionFactory) { |
|
442 | 0 | this.expressionFactory = expressionFactory; |
443 | 0 | } |
444 | ||
445 | /** |
|
446 | * Return the SAXParser we will use to parse the input stream. If there |
|
447 | * is a problem creating the parser, return <code>null</code>. |
|
448 | */ |
|
449 | public SAXParser getParser() { |
|
450 | // Return the parser we already created (if any) |
|
451 | 1027 | if (parser != null) { |
452 | 0 | return (parser); |
453 | } |
|
454 | // Create and return a new parser |
|
455 | 1027 | synchronized (this) { |
456 | try { |
|
457 | 1027 | if (factory == null) { |
458 | 273 | factory = SAXParserFactory.newInstance(); |
459 | } |
|
460 | 1027 | factory.setNamespaceAware(true); |
461 | 1027 | factory.setValidating(validating); |
462 | 1027 | parser = factory.newSAXParser(); |
463 | 1027 | return (parser); |
464 | } |
|
465 | 0 | catch (Exception e) { |
466 | 0 | log.error("XMLParser.getParser: ", e); |
467 | 0 | return (null); |
468 | } |
|
469 | 0 | } |
470 | } |
|
471 | ||
472 | /** |
|
473 | * By setting the reader in the constructor, you can bypass JAXP and |
|
474 | * be able to use digester in Weblogic 6.0. |
|
475 | * |
|
476 | * @deprecated Use getXMLReader() instead, which can throw a |
|
477 | * SAXException if the reader cannot be instantiated |
|
478 | */ |
|
479 | public XMLReader getReader() { |
|
480 | try { |
|
481 | 0 | return (getXMLReader()); |
482 | } |
|
483 | 0 | catch (SAXException e) { |
484 | 0 | log.error("Cannot get XMLReader", e); |
485 | 0 | return (null); |
486 | } |
|
487 | } |
|
488 | ||
489 | /** |
|
490 | * Return the XMLReader to be used for parsing the input document. |
|
491 | * |
|
492 | * @exception SAXException if no XMLReader can be instantiated |
|
493 | */ |
|
494 | public synchronized XMLReader getXMLReader() throws SAXException { |
|
495 | 1027 | if (reader == null) { |
496 | 1027 | reader = getParser().getXMLReader(); |
497 | 1027 | if (this.defaultNamespaceURI != null) { |
498 | 26 | reader = new DefaultNamespaceFilter(this.defaultNamespaceURI,reader); |
499 | } |
|
500 | } |
|
501 | //set up the parse |
|
502 | 1027 | reader.setContentHandler(this); |
503 | 1027 | reader.setDTDHandler(this); |
504 | //reader.setEntityResolver(this); |
|
505 | 1027 | reader.setErrorHandler(this); |
506 | ||
507 | 1027 | return reader; |
508 | } |
|
509 | ||
510 | /** |
|
511 | * Return the validating parser flag. |
|
512 | */ |
|
513 | public boolean getValidating() { |
|
514 | 0 | return (this.validating); |
515 | } |
|
516 | ||
517 | /** |
|
518 | * Set the validating parser flag. This must be called before |
|
519 | * <code>parse()</code> is called the first time. |
|
520 | * |
|
521 | * @param validating The new validating parser flag. |
|
522 | */ |
|
523 | public void setValidating(boolean validating) { |
|
524 | 845 | this.validating = validating; |
525 | 845 | } |
526 | ||
527 | ||
528 | /** |
|
529 | * Returns the script that has just been created if this class is used |
|
530 | * as a SAX ContentHandler and passed into some XML processor or parser. |
|
531 | * |
|
532 | * @return the ScriptBlock created if SAX events are piped into this class, |
|
533 | * which must include a startDocument() and endDocument() |
|
534 | */ |
|
535 | public ScriptBlock getScript() { |
|
536 | 0 | return script; |
537 | } |
|
538 | ||
539 | ||
540 | // ContentHandler interface |
|
541 | //------------------------------------------------------------------------- |
|
542 | /** |
|
543 | * Process notification of the beginning of the document being reached. |
|
544 | * |
|
545 | * @exception SAXException if a parsing error is to be reported |
|
546 | */ |
|
547 | public void startDocument() throws SAXException { |
|
548 | 1027 | script = new ScriptBlock(); |
549 | 1027 | textBuffer = new StringBuffer(); |
550 | 1027 | tagScript = null; |
551 | 1027 | scriptStack.clear(); |
552 | 1027 | tagScriptStack.clear(); |
553 | 1027 | } |
554 | ||
555 | /** |
|
556 | * Process notification of the end of the document being reached. |
|
557 | * |
|
558 | * @exception SAXException if a parsing error is to be reported |
|
559 | */ |
|
560 | public void endDocument() throws SAXException { |
|
561 | 975 | textBuffer = null; |
562 | 975 | } |
563 | ||
564 | /** |
|
565 | * Process notification of the start of an XML element being reached. |
|
566 | * |
|
567 | * @param namespaceURI The Namespace URI, or the empty string if the |
|
568 | * element has no Namespace URI or if Namespace processing is not |
|
569 | * being performed. |
|
570 | * @param localName The local name (without prefix), or the empty |
|
571 | * string if Namespace processing is not being performed. |
|
572 | * @param qName The qualified name (with prefix), or the empty |
|
573 | * string if qualified names are not available.\ |
|
574 | * @param list The attributes attached to the element. If there are |
|
575 | * no attributes, it shall be an empty Attributes object. |
|
576 | * @exception SAXException if a parsing error is to be reported |
|
577 | */ |
|
578 | public void startElement( |
|
579 | String namespaceURI, |
|
580 | String localName, |
|
581 | String qName, |
|
582 | Attributes list) |
|
583 | throws SAXException { |
|
584 | ||
585 | try { |
|
586 | // add check to ensure namespace URI is "" for no namespace |
|
587 | 19981 | if ( namespaceURI == null ) { |
588 | 0 | namespaceURI = ""; |
589 | } |
|
590 | ||
591 | // if this is a tag then create a script to run it |
|
592 | // otherwise pass the text to the current body |
|
593 | 19981 | TagScript newTagScript = createTag(namespaceURI, localName, list); |
594 | 19968 | if (newTagScript == null) { |
595 | 247 | newTagScript = createStaticTag(namespaceURI, localName, qName, list); |
596 | } |
|
597 | 19968 | tagScript = newTagScript; |
598 | 19968 | tagScriptStack.add(tagScript); |
599 | 19968 | if (tagScript != null) { |
600 | // set the line number details |
|
601 | 19968 | if ( locator != null ) { |
602 | 19968 | tagScript.setLocator(locator); |
603 | } |
|
604 | // sets the file name element names |
|
605 | 19968 | tagScript.setFileName(fileName); |
606 | 19968 | tagScript.setElementName(qName); |
607 | 19968 | tagScript.setLocalName(localName); |
608 | ||
609 | 19968 | if (textBuffer.length() > 0) { |
610 | 17355 | addTextScript(textBuffer.toString()); |
611 | 17355 | textBuffer.setLength(0); |
612 | } |
|
613 | 19968 | script.addScript(tagScript); |
614 | // start a new body |
|
615 | 19968 | scriptStack.push(script); |
616 | 19968 | script = new ScriptBlock(); |
617 | 19968 | tagScript.setTagBody(script); |
618 | 19968 | } |
619 | else { |
|
620 | // XXXX: might wanna handle empty elements later... |
|
621 | 0 | textBuffer.append("<"); |
622 | 0 | textBuffer.append(qName); |
623 | 0 | int size = list.getLength(); |
624 | 0 | for (int i = 0; i < size; i++) { |
625 | 0 | textBuffer.append(" "); |
626 | 0 | textBuffer.append(list.getQName(i)); |
627 | 0 | textBuffer.append("="); |
628 | 0 | textBuffer.append("\""); |
629 | 0 | textBuffer.append(list.getValue(i)); |
630 | 0 | textBuffer.append("\""); |
631 | } |
|
632 | 0 | textBuffer.append(">"); |
633 | } |
|
634 | } |
|
635 | 13 | catch (SAXException e) { |
636 | 13 | throw e; |
637 | } |
|
638 | 0 | catch (Exception e) { |
639 | 0 | log.error( "Caught exception: " + e, e ); |
640 | 0 | throw new SAXException( "Runtime Exception: " + e, e ); |
641 | 19968 | } |
642 | 19968 | } |
643 | ||
644 | /** |
|
645 | * Process notification of character data received from the body of |
|
646 | * an XML element. |
|
647 | * |
|
648 | * @param buffer The characters from the XML document |
|
649 | * @param start Starting offset into the buffer |
|
650 | * @param length Number of characters from the buffer |
|
651 | * |
|
652 | * @exception SAXException if a parsing error is to be reported |
|
653 | */ |
|
654 | public void characters(char buffer[], int start, class="keyword">int length) |
|
655 | throws SAXException { |
|
656 | 31954 | textBuffer.append(buffer, start, length); |
657 | 31954 | } |
658 | ||
659 | /** |
|
660 | * Process notification of the end of an XML element being reached. |
|
661 | * |
|
662 | * @param namespaceURI The Namespace URI, or the empty string if the |
|
663 | * element has no Namespace URI or if Namespace processing is not |
|
664 | * being performed. |
|
665 | * @param localName The local name (without prefix), or the empty |
|
666 | * string if Namespace processing is not being performed. |
|
667 | * @param qName The qualified XML 1.0 name (with prefix), or the |
|
668 | * empty string if qualified names are not available. |
|
669 | * @exception SAXException if a parsing error is to be reported |
|
670 | */ |
|
671 | public void endElement(String namespaceURI, String localName, String qName) |
|
672 | throws SAXException { |
|
673 | try { |
|
674 | 19929 | tagScript = (TagScript) tagScriptStack.remove(tagScriptStack.size() - 1); |
675 | 19929 | if (tagScript != null) { |
676 | 19929 | if (textBuffer.length() > 0) { |
677 | 10010 | addTextScript(textBuffer.toString()); |
678 | 10010 | textBuffer.setLength(0); |
679 | } |
|
680 | 19929 | script = (ScriptBlock) scriptStack.pop(); |
681 | 19929 | } |
682 | else { |
|
683 | 0 | textBuffer.append("</"); |
684 | 0 | textBuffer.append(qName); |
685 | 0 | textBuffer.append(">"); |
686 | } |
|
687 | ||
688 | // now lets set the parent tag variable |
|
689 | 19929 | if ( tagScriptStack.isEmpty() ) { |
690 | 988 | tagScript = null; |
691 | 988 | } |
692 | else { |
|
693 | 18941 | tagScript = (TagScript) tagScriptStack.get(tagScriptStack.size() - 1); |
694 | } |
|
695 | 0 | } catch (Exception e) { |
696 | 0 | log.error( "Caught exception: " + e, e ); |
697 | 0 | throw new SAXException( "Runtime Exception: " + e, e ); |
698 | 19929 | } |
699 | 19929 | } |
700 | ||
701 | /** |
|
702 | * Process notification that a namespace prefix is coming in to scope. |
|
703 | * |
|
704 | * @param prefix Prefix that is being declared |
|
705 | * @param namespaceURI Corresponding namespace URI being mapped to |
|
706 | * |
|
707 | * @exception SAXException if a parsing error is to be reported |
|
708 | */ |
|
709 | public void startPrefixMapping(String prefix, String namespaceURI) |
|
710 | throws SAXException { |
|
711 | // Register this prefix mapping |
|
712 | 1118 | ArrayStack stack = (ArrayStack) namespaces.get(prefix); |
713 | 1118 | if (stack == null) { |
714 | 1118 | stack = new ArrayStack(); |
715 | 1118 | namespaces.put(prefix, stack); |
716 | } |
|
717 | 1118 | stack.push(namespaceURI); |
718 | ||
719 | 1118 | if ( elementNamespaces == null ) { |
720 | 1040 | elementNamespaces = new HashMap(); |
721 | } |
|
722 | 1118 | elementNamespaces.put(prefix, namespaceURI); |
723 | 1118 | } |
724 | ||
725 | /** |
|
726 | * Process notification that a namespace prefix is going out of scope. |
|
727 | * |
|
728 | * @param prefix Prefix that is going out of scope |
|
729 | * |
|
730 | * @exception SAXException if a parsing error is to be reported |
|
731 | */ |
|
732 | public void endPrefixMapping(String prefix) throws SAXException { |
|
733 | // Deregister this prefix mapping |
|
734 | 1066 | ArrayStack stack = (ArrayStack) namespaces.get(prefix); |
735 | 1066 | if (stack == null) { |
736 | 0 | return; |
737 | } |
|
738 | try { |
|
739 | 1066 | stack.pop(); |
740 | 1066 | if (stack.empty()) { |
741 | 1066 | namespaces.remove(prefix); |
742 | } |
|
743 | } |
|
744 | 0 | catch (EmptyStackException e) { |
745 | 0 | throw createSAXException("endPrefixMapping popped too many times"); |
746 | 1066 | } |
747 | 1066 | } |
748 | ||
749 | /** |
|
750 | * Process notification of ignorable whitespace received from the body of |
|
751 | * an XML element. |
|
752 | * |
|
753 | * @param buffer The characters from the XML document |
|
754 | * @param start Starting offset into the buffer |
|
755 | * @param len Number of characters from the buffer |
|
756 | * |
|
757 | * @exception SAXException if a parsing error is to be reported |
|
758 | */ |
|
759 | public void ignorableWhitespace(char buffer[], int start, class="keyword">int len) |
|
760 | throws SAXException { |
|
761 | ; // No processing required |
|
762 | 338 | } |
763 | ||
764 | /** |
|
765 | * Process notification of a processing instruction that was encountered. |
|
766 | * |
|
767 | * @param target The processing instruction target |
|
768 | * @param data The processing instruction data (if any) |
|
769 | * |
|
770 | * @exception SAXException if a parsing error is to be reported |
|
771 | */ |
|
772 | public void processingInstruction(String target, String data) |
|
773 | throws SAXException { |
|
774 | ; // No processing is required |
|
775 | 0 | } |
776 | ||
777 | /** |
|
778 | * Set the document locator associated with our parser. |
|
779 | * |
|
780 | * @param locator The new locator |
|
781 | */ |
|
782 | public void setDocumentLocator(Locator locator) { |
|
783 | 1027 | this.locator = locator; |
784 | 1027 | } |
785 | ||
786 | /** |
|
787 | * Process notification of a skipped entity. |
|
788 | * |
|
789 | * @param name Name of the skipped entity |
|
790 | * |
|
791 | * @exception SAXException if a parsing error is to be reported |
|
792 | */ |
|
793 | public void skippedEntity(String name) throws SAXException { |
|
794 | ; // No processing required |
|
795 | 0 | } |
796 | ||
797 | ||
798 | // DTDHandler interface |
|
799 | //------------------------------------------------------------------------- |
|
800 | ||
801 | /** |
|
802 | * Receive notification of a notation declaration event. |
|
803 | * |
|
804 | * @param name The notation name |
|
805 | * @param publicId The public identifier (if any) |
|
806 | * @param systemId The system identifier (if any) |
|
807 | */ |
|
808 | public void notationDecl(String name, String class="keyword">publicId, String systemId) { |
|
809 | 0 | } |
810 | ||
811 | /** |
|
812 | * Receive notification of an unparsed entity declaration event. |
|
813 | * |
|
814 | * @param name The unparsed entity name |
|
815 | * @param publicId The public identifier (if any) |
|
816 | * @param systemId The system identifier (if any) |
|
817 | * @param notation The name of the associated notation |
|
818 | */ |
|
819 | public void unparsedEntityDecl( |
|
820 | String name, |
|
821 | String publicId, |
|
822 | String systemId, |
|
823 | String notation) { |
|
824 | 0 | } |
825 | ||
826 | ||
827 | // ErrorHandler interface |
|
828 | //------------------------------------------------------------------------- |
|
829 | ||
830 | /** |
|
831 | * Forward notification of a parsing error to the application supplied |
|
832 | * error handler, if any, otherwise throw a SAXException with the error. |
|
833 | * |
|
834 | * @param exception The error information |
|
835 | * |
|
836 | * @exception SAXException if a parsing exception occurs |
|
837 | */ |
|
838 | public void error(SAXParseException exception) throws SAXException { |
|
839 | 26 | log.error( |
840 | "Parse Error at line " |
|
841 | + exception.getLineNumber() |
|
842 | + " column " |
|
843 | + exception.getColumnNumber() |
|
844 | + ": " |
|
845 | + exception.getMessage(), |
|
846 | exception); |
|
847 | 26 | if (errorHandler != null) { |
848 | 0 | errorHandler.error(exception); |
849 | 0 | } else { |
850 | 26 | throw exception; |
851 | } |
|
852 | 0 | } |
853 | ||
854 | /** |
|
855 | * Forward notification of a fatal parsing error to the application |
|
856 | * supplied error handler, if any, otherwise throw a SAXException with the error. |
|
857 | * |
|
858 | * @param exception The fatal error information |
|
859 | * |
|
860 | * @exception SAXException if a parsing exception occurs |
|
861 | */ |
|
862 | public void fatalError(SAXParseException exception) throws SAXException { |
|
863 | 13 | log.error( |
864 | "Parse Fatal Error at line " |
|
865 | + exception.getLineNumber() |
|
866 | + " column " |
|
867 | + exception.getColumnNumber() |
|
868 | + ": " |
|
869 | + exception.getMessage(), |
|
870 | exception); |
|
871 | 13 | if (errorHandler != null) { |
872 | 0 | errorHandler.fatalError(exception); |
873 | 0 | } else { |
874 | 13 | throw exception; |
875 | } |
|
876 | 0 | } |
877 | ||
878 | /** |
|
879 | * Forward notification of a parse warning to the application supplied |
|
880 | * error handler (if any). Unlike XMLParser.error(SAXParseException) and |
|
881 | * XMLParser.fatalError(SAXParseException), this implementation will |
|
882 | * NOT throw a SAXException by default if no error handler is supplied. |
|
883 | * |
|
884 | * @param exception The warning information |
|
885 | * |
|
886 | * @exception SAXException if a parsing exception occurs |
|
887 | */ |
|
888 | public void warning(SAXParseException exception) throws SAXException { |
|
889 | 0 | log.error( |
890 | "Parse Warning at line " |
|
891 | + exception.getLineNumber() |
|
892 | + " column " |
|
893 | + exception.getColumnNumber() |
|
894 | + ": " |
|
895 | + exception.getMessage(), |
|
896 | exception); |
|
897 | 0 | if (errorHandler != null) { |
898 | 0 | errorHandler.warning(exception); |
899 | } |
|
900 | 0 | } |
901 | ||
902 | // Implementation methods |
|
903 | //------------------------------------------------------------------------- |
|
904 | /** |
|
905 | * If this object has not been configured then register the default |
|
906 | * namespaces |
|
907 | */ |
|
908 | private void ensureConfigured() { |
|
909 | 1027 | if (!configured) { |
910 | 1027 | configure(); |
911 | 1027 | configured = true; |
912 | } |
|
913 | 1027 | } |
914 | ||
915 | /** |
|
916 | * This method is called only once before parsing occurs |
|
917 | * which allows tag libraries to be registered and so forth |
|
918 | */ |
|
919 | protected void configure() { |
|
920 | // load the properties file of libraries available |
|
921 | 1027 | Properties properties = getJellyProperties(); |
922 | 1027 | for (Iterator iter = properties.entrySet().iterator(); iter.hasNext();) { |
923 | 39026 | Map.Entry entry = (Map.Entry) iter.next(); |
924 | 39026 | String uri = (String) entry.getKey(); |
925 | 39026 | String className = (String) entry.getValue(); |
926 | 39026 | String libraryURI = "jelly:" + uri; |
927 | ||
928 | // don't overload any Mock Tags already |
|
929 | 39026 | if ( ! context.isTagLibraryRegistered(libraryURI) ) { |
930 | 35074 | context.registerTagLibrary(libraryURI, className); |
931 | } |
|
932 | 39026 | } |
933 | 1027 | } |
934 | ||
935 | ||
936 | /** |
|
937 | * A helper method which loads the static Jelly properties once on startup |
|
938 | */ |
|
939 | protected synchronized Properties getJellyProperties() { |
|
940 | 1027 | if (jellyProperties == null) { |
941 | 273 | jellyProperties = new Properties(); |
942 | ||
943 | 273 | InputStream in = null; |
944 | 273 | URL url = |
945 | getClassLoader().getResource("org/apache/commons/jelly/jelly.properties"); |
|
946 | 273 | if (url != null) { |
947 | 273 | log.debug("Loading Jelly default tag libraries from: " + url); |
948 | try { |
|
949 | 273 | in = url.openStream(); |
950 | 273 | jellyProperties .load(in); |
951 | } |
|
952 | 0 | catch (IOException e) { |
953 | 0 | log.error("Could not load jelly properties from: " + url + ". Reason: " + e, e); |
954 | } |
|
955 | finally { |
|
956 | 0 | try { |
957 | 273 | in.close(); |
958 | } |
|
959 | 0 | catch (Exception e) { |
960 | 0 | if (log.isDebugEnabled()) log.debug("error closing jelly.properties", e); |
961 | 273 | } |
962 | 0 | } |
963 | } |
|
964 | } |
|
965 | 1027 | return jellyProperties; |
966 | } |
|
967 | ||
968 | /** |
|
969 | * Factory method to create new Tag script for the given namespaceURI and name or |
|
970 | * return null if this is not a custom Tag. |
|
971 | */ |
|
972 | protected TagScript createTag( |
|
973 | String namespaceURI, |
|
974 | String localName, |
|
975 | Attributes list) |
|
976 | throws SAXException { |
|
977 | try { |
|
978 | // use the URI to load a taglib |
|
979 | 19981 | TagLibrary taglib = context.getTagLibrary(namespaceURI); |
980 | 19981 | if (taglib == null) { |
981 | 312 | if (namespaceURI != null && namespaceURI.startsWith("jelly:")) { |
982 | 65 | String uri = namespaceURI.substring(6); |
983 | // try to find the class on the claspath |
|
984 | try { |
|
985 | 65 | Class taglibClass = getClassLoader().loadClass(uri); |
986 | 52 | taglib = (TagLibrary) taglibClass.newInstance(); |
987 | 52 | context.registerTagLibrary(namespaceURI, taglib); |
988 | } |
|
989 | 13 | catch (ClassNotFoundException e) { |
990 | 13 | throw createSAXException("Could not load class: " + uri + " so taglib instantiation failed", e); |
991 | } |
|
992 | 0 | catch (IllegalAccessException e) { |
993 | 0 | throw createSAXException("Constructor for class is not accessible: " + uri + " so taglib instantiation failed",e); |
994 | } |
|
995 | 0 | catch (InstantiationException e) { |
996 | 0 | throw createSAXException("Class could not be instantiated: " + uri + " so taglib instantiation failed",e); |
997 | } |
|
998 | 0 | catch (ClassCastException e) { |
999 | 0 | throw createSAXException("Class is not a TagLibrary: " + uri + " so taglib instantiation failed",e); |
1000 | 52 | } |
1001 | } |
|
1002 | } |
|
1003 | 19968 | if (taglib != null) { |
1004 | 19721 | TagScript script = taglib.createTagScript(localName, list); |
1005 | 19721 | if ( script != null ) { |
1006 | 19721 | configureTagScript(script); |
1007 | ||
1008 | // clone the attributes to keep them around after this parse |
|
1009 | 19721 | script.setSaxAttributes(new AttributesImpl(list)); |
1010 | ||
1011 | // now iterate through through the expressions |
|
1012 | 19721 | int size = list.getLength(); |
1013 | 45747 | for (int i = 0; i < size; i++) { |
1014 | 26026 | String attributeName = list.getLocalName(i); |
1015 | 26026 | String attributeValue = list.getValue(i); |
1016 | 26026 | Expression expression = |
1017 | taglib.createExpression( |
|
1018 | getExpressionFactory(), |
|
1019 | script, |
|
1020 | attributeName, |
|
1021 | attributeValue); |
|
1022 | 26026 | if (expression == null) { |
1023 | 0 | expression = createConstantExpression(localName, attributeName, attributeValue); |
1024 | } |
|
1025 | 26026 | script.addAttribute(attributeName, expression); |
1026 | } |
|
1027 | } |
|
1028 | 19721 | return script; |
1029 | } |
|
1030 | 247 | return null; |
1031 | } |
|
1032 | 13 | catch (Exception e) { |
1033 | 13 | log.warn( |
1034 | "Could not create taglib or URI: " + namespaceURI + " tag name: " + localName, |
|
1035 | e); |
|
1036 | 13 | throw createSAXException(e); |
1037 | } |
|
1038 | } |
|
1039 | ||
1040 | ||
1041 | /** |
|
1042 | * Factory method to create a static Tag that represents some static content. |
|
1043 | */ |
|
1044 | protected TagScript createStaticTag( |
|
1045 | final String namespaceURI, |
|
1046 | final String localName, |
|
1047 | final String qName, |
|
1048 | Attributes list) |
|
1049 | throws SAXException { |
|
1050 | try { |
|
1051 | 247 | StaticTag tag = new StaticTag( namespaceURI, localName, qName ); |
1052 | 247 | StaticTagScript script = new StaticTagScript( |
1053 | new TagFactory() { |
|
1054 | public Tag createTag(String name, Attributes attributes) { |
|
1055 | return new StaticTag( namespaceURI, localName, qName ); |
|
1056 | } |
|
1057 | } |
|
1058 | ); |
|
1059 | 247 | configureTagScript(script); |
1060 | ||
1061 | // now iterate through through the expressions |
|
1062 | 247 | int size = list.getLength(); |
1063 | 351 | for (int i = 0; i < size; i++) { |
1064 | 104 | String attributeValue = list.getValue(i); |
1065 | 104 | Expression expression = CompositeExpression.parse( |
1066 | attributeValue, getExpressionFactory() |
|
1067 | ); |
|
1068 | 104 | String attrQName = list.getQName(i); |
1069 | 104 | script.addAttribute(attrQName, expression); |
1070 | } |
|
1071 | 247 | return script; |
1072 | } |
|
1073 | 0 | catch (Exception e) { |
1074 | 0 | log.warn( |
1075 | "Could not create static tag for URI: " |
|
1076 | + namespaceURI |
|
1077 | + " tag name: " |
|
1078 | + localName, |
|
1079 | e); |
|
1080 | 0 | throw createSAXException(e); |
1081 | } |
|
1082 | } |
|
1083 | ||
1084 | ||
1085 | /** |
|
1086 | * Configure a newly created TagScript instance before any Expressions are created |
|
1087 | * |
|
1088 | * @param aTagScript |
|
1089 | */ |
|
1090 | protected void configureTagScript(TagScript aTagScript) { |
|
1091 | // set parent relationship... |
|
1092 | 19968 | aTagScript.setParent(this.tagScript); |
1093 | ||
1094 | // set the namespace Map |
|
1095 | 19968 | if ( elementNamespaces != null ) { |
1096 | 1040 | aTagScript.setTagNamespacesMap( elementNamespaces ); |
1097 | 1040 | elementNamespaces = null; |
1098 | } |
|
1099 | 19968 | } |
1100 | ||
1101 | /** |
|
1102 | * Adds the text to the current script block parsing any embedded |
|
1103 | * expressions inot ExpressionScript objects. |
|
1104 | */ |
|
1105 | protected void addTextScript(String text) throws JellyException { |
|
1106 | 27365 | Expression expression = |
1107 | CompositeExpression.parse(text, getExpressionFactory()); |
|
1108 | ||
1109 | 27365 | addExpressionScript(script, expression); |
1110 | 27365 | } |
1111 | ||
1112 | ||
1113 | /** |
|
1114 | * Adds the given Expression object to the current Script. |
|
1115 | */ |
|
1116 | protected void addExpressionScript(ScriptBlock script, Expression expression) { |
|
1117 | 28405 | if ( expression instanceof ConstantExpression ) { |
1118 | 27768 | ConstantExpression constantExpression |
1119 | = (ConstantExpression) expression; |
|
1120 | 27768 | Object value = constantExpression.getValue(); |
1121 | 27768 | if ( value != null ) { |
1122 | 27768 | script.addScript(new TextScript( value.toString() )); |
1123 | } |
|
1124 | 27768 | } |
1125 | else |
|
1126 | 637 | if ( expression instanceof CompositeExpression ) { |
1127 | 208 | CompositeTextScriptBlock newBlock = new CompositeTextScriptBlock(); |
1128 | 208 | script.addScript(newBlock); |
1129 | ||
1130 | 208 | CompositeExpression compositeExpression |
1131 | = (CompositeExpression) expression; |
|
1132 | 208 | Iterator iter = compositeExpression.getExpressions().iterator(); |
1133 | 1248 | while (iter.hasNext()) { |
1134 | 1040 | addExpressionScript( newBlock, (Expression) iter.next() ); |
1135 | 1040 | } |
1136 | 208 | } |
1137 | else { |
|
1138 | 429 | script.addScript(new ExpressionScript(expression)); |
1139 | } |
|
1140 | 28405 | } |
1141 | ||
1142 | protected Expression createConstantExpression( |
|
1143 | String tagName, |
|
1144 | String attributeName, |
|
1145 | String attributeValue) { |
|
1146 | 0 | return new ConstantExpression(attributeValue); |
1147 | } |
|
1148 | ||
1149 | protected ExpressionFactory createExpressionFactory() { |
|
1150 | 1001 | return new JexlExpressionFactory(); |
1151 | } |
|
1152 | ||
1153 | /** |
|
1154 | * @return the current context URI as a String or null if there is no |
|
1155 | * current context defined on the JellyContext |
|
1156 | */ |
|
1157 | protected String getCurrentURI() { |
|
1158 | 52 | URL url = this.getContext().getCurrentURL(); |
1159 | 52 | return (url != null) ? url.toString() : class="keyword">null; |
1160 | } |
|
1161 | ||
1162 | /** |
|
1163 | * Create a SAX exception which also understands about the location in |
|
1164 | * the file where the exception occurs |
|
1165 | * |
|
1166 | * @return the new exception |
|
1167 | */ |
|
1168 | protected SAXException createSAXException(String message, Exception e) { |
|
1169 | 26 | log.warn("Underlying exception: " + e); |
1170 | 26 | e.printStackTrace(); |
1171 | 26 | if (locator != null) { |
1172 | 26 | String error = |
1173 | "Error at (" |
|
1174 | + locator.getLineNumber() |
|
1175 | + ", " |
|
1176 | + locator.getColumnNumber() |
|
1177 | + "): " |
|
1178 | + message; |
|
1179 | 26 | if (e != null) { |
1180 | 26 | return new SAXParseException(error, locator, e); |
1181 | } |
|
1182 | else { |
|
1183 | 0 | return new SAXParseException(error, locator); |
1184 | } |
|
1185 | } |
|
1186 | 0 | log.error("No Locator!"); |
1187 | 0 | if (e != null) { |
1188 | 0 | return new SAXException(message, e); |
1189 | } |
|
1190 | else { |
|
1191 | 0 | return new SAXException(message); |
1192 | } |
|
1193 | } |
|
1194 | ||
1195 | /** |
|
1196 | * Create a SAX exception which also understands about the location in |
|
1197 | * the digester file where the exception occurs |
|
1198 | * |
|
1199 | * @return the new exception |
|
1200 | */ |
|
1201 | protected SAXException createSAXException(Exception e) { |
|
1202 | 13 | return createSAXException(e.getMessage(), e); |
1203 | } |
|
1204 | /** |
|
1205 | * Create a SAX exception which also understands about the location in |
|
1206 | * the digester file where the exception occurs |
|
1207 | * |
|
1208 | * @return the new exception |
|
1209 | */ |
|
1210 | protected SAXException createSAXException(String message) { |
|
1211 | 0 | return createSAXException(message, null); |
1212 | } |
|
1213 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |