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1 /*** 2 * BSD-style license; for more info see http://pmd.sourceforge.net/license.html 3 */ 4 package net.sourceforge.pmd.rules; 5 6 import net.sourceforge.pmd.AbstractRule; 7 import net.sourceforge.pmd.RuleContext; 8 import net.sourceforge.pmd.ast.ASTMethodDeclarator; 9 import net.sourceforge.pmd.ast.ASTType; 10 import net.sourceforge.pmd.symboltable.NameOccurrence; 11 import net.sourceforge.pmd.symboltable.Scope; 12 import net.sourceforge.pmd.symboltable.VariableNameDeclaration; 13 import net.sourceforge.pmd.symboltable.LocalScope; 14 import net.sourceforge.pmd.symboltable.MethodScope; 15 import net.sourceforge.pmd.symboltable.NameDeclaration; 16 17 import java.text.MessageFormat; 18 import java.util.Iterator; 19 import java.util.List; 20 import java.util.Map; 21 22 public class AvoidReassigningParametersRule extends AbstractRule { 23 24 public Object visit(ASTMethodDeclarator node, Object data) { 25 Scope scope = node.getScope(); 26 Map params = scope.getVariableDeclarations(true); 27 for (Iterator i = params.keySet().iterator(); i.hasNext();) { 28 VariableNameDeclaration decl = (VariableNameDeclaration) i.next(); 29 List usages = (List) params.get(decl); 30 for (Iterator j = usages.iterator(); j.hasNext();) { 31 NameOccurrence occ = (NameOccurrence) j.next(); 32 if (occ.isOnLeftHandSide() && occ.getNameForWhichThisIsAQualifier() == null && !decl.isArray()) { 33 RuleContext ctx = (RuleContext) data; 34 String msg = MessageFormat.format(getMessage(), new Object[]{decl.getImage()}); 35 ctx.getReport().addRuleViolation(createRuleViolation(ctx, decl.getLine(), msg)); 36 } 37 } 38 } 39 return super.visit(node, data); 40 } 41 }

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