Clover coverage report - PMD - 3.7
Coverage timestamp: Wed May 31 2006 09:25:59 EDT
file stats: LOC: 45   Methods: 2
NCLOC: 33   Classes: 1
 
 Source file Conditionals Statements Methods TOTAL
UnusedLocalVariableRule.java 100% 100% 100% 100%
coverage
 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.ast.ASTLocalVariableDeclaration;
 8    import net.sourceforge.pmd.ast.ASTVariableDeclarator;
 9    import net.sourceforge.pmd.ast.ASTVariableDeclaratorId;
 10    import net.sourceforge.pmd.symboltable.NameOccurrence;
 11   
 12    import java.util.Iterator;
 13    import java.util.List;
 14   
 15    public class UnusedLocalVariableRule extends AbstractRule {
 16   
 17  29 public Object visit(ASTLocalVariableDeclaration decl, Object data) {
 18  29 for (int i = 0; i < decl.jjtGetNumChildren(); i++) {
 19  59 if (!(decl.jjtGetChild(i) instanceof ASTVariableDeclarator)) {
 20  29 continue;
 21    }
 22  30 ASTVariableDeclaratorId node = (ASTVariableDeclaratorId) decl.jjtGetChild(i).jjtGetChild(0);
 23    // TODO this isArray() check misses some cases
 24    // need to add DFAish code to determine if an array
 25    // is initialized locally or gotten from somewhere else
 26  30 if (!node.getNameDeclaration().isArray() && !actuallyUsed(node.getUsages())) {
 27  16 addViolation(data, node, node.getNameDeclaration().getImage());
 28    }
 29    }
 30  29 return data;
 31    }
 32   
 33  29 private boolean actuallyUsed(List usages) {
 34  29 for (Iterator j = usages.iterator(); j.hasNext();) {
 35  15 NameOccurrence occ = (NameOccurrence) j.next();
 36  15 if (occ.isOnLeftHandSide()) {
 37  2 continue;
 38    } else {
 39  13 return true;
 40    }
 41    }
 42  16 return false;
 43    }
 44   
 45    }