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/*
* Copyright 2003-2013 Dave Griffith, Bas Leijdekkers
*
* 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.bugs;
import com.intellij.psi.*;
import com.siyeh.InspectionGadgetsBundle;
import com.siyeh.ig.BaseInspection;
import com.siyeh.ig.BaseInspectionVisitor;
import com.siyeh.ig.psiutils.InheritanceUtil;
import org.jetbrains.annotations.NotNull;
public class InstanceofIncompatibleInterfaceInspection extends BaseInspection {
@Override
@NotNull
public String getDisplayName() {
return InspectionGadgetsBundle.message("instanceof.with.incompatible.interface.display.name");
}
@Override
@NotNull
public String buildErrorString(Object... infos) {
return InspectionGadgetsBundle.message("instanceof.with.incompatible.interface.problem.descriptor");
}
@Override
public BaseInspectionVisitor buildVisitor() {
return new InstanceofIncompatibleInterfaceVisitor();
}
private static class InstanceofIncompatibleInterfaceVisitor extends BaseInspectionVisitor {
@Override
public void visitInstanceOfExpression(@NotNull PsiInstanceOfExpression expression) {
super.visitInstanceOfExpression(expression);
final PsiTypeElement castTypeElement = expression.getCheckType();
if (castTypeElement == null) {
return;
}
final PsiType castType = castTypeElement.getType();
if (!(castType instanceof PsiClassType)) {
return;
}
final PsiClassType castClassType = (PsiClassType)castType;
final PsiExpression operand = expression.getOperand();
final PsiType operandType = operand.getType();
if (!(operandType instanceof PsiClassType)) {
return;
}
final PsiClassType operandClassType = (PsiClassType)operandType;
final PsiClass castClass = castClassType.resolve();
if (castClass == null || !castClass.isInterface()) {
return;
}
final PsiClass operandClass = operandClassType.resolve();
if (operandClass == null || operandClass.isInterface()) {
return;
}
if (InheritanceUtil.existsMutualSubclass(operandClass, castClass, isOnTheFly())) {
return;
}
registerError(castTypeElement);
}
}
}
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