org.apache.lucene.queryparser.xml

## Class DOMUtils

- java.lang.Object
- - org.apache.lucene.queryparser.xml.DOMUtils

-     public class DOMUtils
      extends Object

  Helper methods for parsing XML

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `DOMUtils()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `static boolean` | `getAttribute(Element element, String attributeName, boolean deflt)`
    `static float` | `getAttribute(Element element, String attributeName, float deflt)`
    `static int` | `getAttribute(Element element, String attributeName, int deflt)`
    `static String` | `getAttribute(Element element, String attributeName, String deflt)`
    `static String` | `getAttributeOrFail(Element e, String name)`
    `static String` | `getAttributeWithInheritance(Element element, String attributeName)` Returns an attribute value from this node, or first parent node with this attribute defined
    `static String` | `getAttributeWithInheritanceOrFail(Element e, String name)`
    `static Element` | `getChildByTagName(Element e, String name)`
    `static Element` | `getChildByTagOrFail(Element e, String name)`
    `static String` | `getChildTextByTagName(Element e, String tagName)`
    `static Element` | `getFirstChildElement(Element element)`
    `static Element` | `getFirstChildOrFail(Element e)`
    `static String` | `getNonBlankTextOrFail(Element e)`
    `static String` | `getText(Node e)`
    `static Element` | `insertChild(Element parent, String tagName, String text)`
    `static Document` | `loadXML(Reader is)` Helper method to parse an XML file into a DOM tree, given a reader.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### DOMUtils

          public DOMUtils()

  - ### Method Detail

    - #### getChildByTagOrFail

          public static Element getChildByTagOrFail(Element e,
                                    String name)
                                             throws ParserException

      Throws:
        `ParserException`

    - #### getFirstChildOrFail

          public static Element getFirstChildOrFail(Element e)
                                             throws ParserException

      Throws:
        `ParserException`

    - #### getAttributeOrFail

          public static String getAttributeOrFail(Element e,
                                  String name)
                                           throws ParserException

      Throws:
        `ParserException`

    - #### getAttributeWithInheritanceOrFail

          public static String getAttributeWithInheritanceOrFail(Element e,
                                                 String name)
                                                          throws ParserException

      Throws:
        `ParserException`

    - #### getNonBlankTextOrFail

          public static String getNonBlankTextOrFail(Element e)
                                              throws ParserException

      Throws:
        `ParserException`

    - #### getChildByTagName

          public static Element getChildByTagName(Element e,
                                  String name)

    - #### getAttributeWithInheritance

          public static String getAttributeWithInheritance(Element element,
                                           String attributeName)

      Returns an attribute value from this node, or first parent node with this attribute defined
      Returns:
        A non-zero-length value if defined, otherwise null

    - #### getChildTextByTagName

          public static String getChildTextByTagName(Element e,
                                     String tagName)

    - #### insertChild

          public static Element insertChild(Element parent,
                            String tagName,
                            String text)

    - #### getAttribute

          public static String getAttribute(Element element,
                            String attributeName,
                            String deflt)

    - #### getAttribute

          public static float getAttribute(Element element,
                           String attributeName,
                           float deflt)

    - #### getAttribute

          public static int getAttribute(Element element,
                         String attributeName,
                         int deflt)

    - #### getAttribute

          public static boolean getAttribute(Element element,
                             String attributeName,
                             boolean deflt)

    - #### getText

          public static String getText(Node e)

    - #### getFirstChildElement

          public static Element getFirstChildElement(Element element)

    - #### loadXML

          public static Document loadXML(Reader is)

      Helper method to parse an XML file into a DOM tree, given a reader.
      Parameters:
        `is` - reader of the XML file to be parsed
      Returns:
        an org.w3c.dom.Document object

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