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/*
* Copyright 2000-2013 JetBrains s.r.o.
*
* 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 com.siyeh.ig.assignment;
import com.intellij.psi.*;
import com.intellij.psi.util.InheritanceUtil;
import com.intellij.psi.util.PsiTreeUtil;
import com.siyeh.InspectionGadgetsBundle;
import com.siyeh.ig.BaseInspection;
import com.siyeh.ig.BaseInspectionVisitor;
import org.jetbrains.annotations.Nls;
import org.jetbrains.annotations.NotNull;
/**
* @author Bas Leijdekkers
*/
public class AssignmentToSuperclassFieldInspection extends BaseInspection {
@Nls
@NotNull
@Override
public String getDisplayName() {
return InspectionGadgetsBundle.message("assignment.to.superclass.field.display.name");
}
@NotNull
@Override
protected String buildErrorString(Object... infos) {
final PsiReferenceExpression referenceExpression = (PsiReferenceExpression)infos[0];
final PsiClass superclass = (PsiClass)infos[1];
return InspectionGadgetsBundle.message("assignment.to.superclass.field.problem.descriptor",
referenceExpression.getReferenceName(), superclass.getName());
}
@Override
public BaseInspectionVisitor buildVisitor() {
return new AssignmentToSuperclassFieldVisitor();
}
private static class AssignmentToSuperclassFieldVisitor extends BaseInspectionVisitor {
@Override
public void visitAssignmentExpression(PsiAssignmentExpression expression) {
super.visitAssignmentExpression(expression);
final PsiExpression lhs = expression.getLExpression();
checkSuperclassField(lhs);
}
@Override
public void visitPrefixExpression(PsiPrefixExpression expression) {
super.visitPrefixExpression(expression);
final PsiExpression operand = expression.getOperand();
checkSuperclassField(operand);
}
@Override
public void visitPostfixExpression(PsiPostfixExpression expression) {
super.visitPostfixExpression(expression);
final PsiExpression operand = expression.getOperand();
checkSuperclassField(operand);
}
private void checkSuperclassField(PsiExpression expression) {
if (!(expression instanceof PsiReferenceExpression)) {
return;
}
final PsiMethod method = PsiTreeUtil.getParentOfType(expression, PsiMethod.class, true, PsiClass.class);
if (method == null || !method.isConstructor()) {
return;
}
final PsiReferenceExpression referenceExpression = (PsiReferenceExpression)expression;
final PsiExpression qualifierExpression = referenceExpression.getQualifierExpression();
if (qualifierExpression != null &&
!(qualifierExpression instanceof PsiThisExpression) && !(qualifierExpression instanceof PsiSuperExpression)) {
return;
}
final PsiElement target = referenceExpression.resolve();
if (!(target instanceof PsiField)) {
return;
}
final PsiField field = (PsiField)target;
final PsiClass fieldClass = field.getContainingClass();
if (fieldClass == null) {
return;
}
final PsiClass assignmentClass = method.getContainingClass();
final String name = fieldClass.getQualifiedName();
if (name == null || !InheritanceUtil.isInheritor(assignmentClass, true, name)) {
return;
}
registerError(expression, referenceExpression, fieldClass);
}
}
}
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