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/*
* Copyright 2007-2008 Dave Griffith
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.plugins.groovy.codeInspection.assignment;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiReference;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.annotations.Nls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.plugins.groovy.codeInspection.BaseInspection;
import org.jetbrains.plugins.groovy.codeInspection.BaseInspectionVisitor;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.clauses.GrForClause;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.clauses.GrTraditionalForClause;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrAssignmentExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrReferenceExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.params.GrParameter;
public class GroovyAssignmentToForLoopParameterInspection extends BaseInspection {
@Override
@Nls
@NotNull
public String getGroupDisplayName() {
return ASSIGNMENT_ISSUES;
}
@Override
@Nls
@NotNull
public String getDisplayName() {
return "Assignment to for-loop parameter";
}
@Override
@Nullable
protected String buildErrorString(Object... args) {
return "Assignment to for-loop parameter '#ref' #loc";
}
@Override
public BaseInspectionVisitor buildVisitor() {
return new Visitor();
}
private static class Visitor extends BaseInspectionVisitor {
@Override
public void visitAssignmentExpression(GrAssignmentExpression grAssignmentExpression) {
super.visitAssignmentExpression(grAssignmentExpression);
final GrExpression lhs = grAssignmentExpression.getLValue();
if (!(lhs instanceof GrReferenceExpression)) {
return;
}
final PsiElement referent = ((PsiReference) lhs).resolve();
if (referent == null) {
return;
}
if (!(referent instanceof GrParameter)) {
return;
}
final PsiElement parent = referent.getParent();
if (!(parent instanceof GrForClause)) {
return;
}
if (parent instanceof GrTraditionalForClause && PsiTreeUtil.isAncestor(parent, grAssignmentExpression, true)) {
return;
}
registerError(lhs);
}
}
}
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