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1 package net.sourceforge.pmd.rules; 2 3 import net.sourceforge.pmd.AbstractRule; 4 import net.sourceforge.pmd.RuleContext; 5 import net.sourceforge.pmd.ast.ASTMethodDeclarator; 6 import net.sourceforge.pmd.symboltable.NameOccurrence; 7 import net.sourceforge.pmd.symboltable.Scope; 8 import net.sourceforge.pmd.symboltable.VariableNameDeclaration; 9 10 import java.text.MessageFormat; 11 import java.util.Iterator; 12 import java.util.List; 13 import java.util.Map; 14 15 public class AvoidReassigningParametersRule extends AbstractRule { 16 17 public Object visit(ASTMethodDeclarator node, Object data) { 18 Scope scope = node.getScope(); 19 Map params = scope.getVariableDeclarations(true); 20 for (Iterator i = params.keySet().iterator(); i.hasNext();) { 21 VariableNameDeclaration decl = (VariableNameDeclaration) i.next(); 22 List usages = (List) params.get(decl); 23 for (Iterator j = usages.iterator(); j.hasNext();) { 24 NameOccurrence occ = (NameOccurrence) j.next(); 25 if (occ.isOnLeftHandSide() && (occ.getNameForWhichThisIsAQualifier() == null)) { 26 RuleContext ctx = (RuleContext) data; 27 String msg = MessageFormat.format(getMessage(), new Object[]{decl.getImage()}); 28 ctx.getReport().addRuleViolation(createRuleViolation(ctx, decl.getLine(), msg)); 29 } 30 } 31 } 32 return super.visit(node, data); 33 } 34 }

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