/**
* BSD-style license; for more info see http://pmd.sourceforge.net/license.html
*/
package net.sourceforge.pmd.lang.java.rule.optimizations;
import java.util.List;
import java.util.Map;
import net.sourceforge.pmd.lang.java.ast.ASTLocalVariableDeclaration;
import net.sourceforge.pmd.lang.java.symboltable.VariableNameDeclaration;
import net.sourceforge.pmd.lang.symboltable.NameOccurrence;
import net.sourceforge.pmd.lang.symboltable.Scope;
public class LocalVariableCouldBeFinalRule extends AbstractOptimizationRule {
public Object visit(ASTLocalVariableDeclaration node, Object data) {
if (node.isFinal()) {
return data;
}
Scope s = node.getScope();
Map<VariableNameDeclaration, List<NameOccurrence>> decls = s.getDeclarations(VariableNameDeclaration.class);
for (Map.Entry<VariableNameDeclaration, List<NameOccurrence>> entry : decls.entrySet()) {
VariableNameDeclaration var = entry.getKey();
if (var.getAccessNodeParent() != node) {
continue;
}
if (!assigned(entry.getValue())) {
addViolation(data, var.getAccessNodeParent(), var.getImage());
}
}
return data;
}
}