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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.control;
import com.intellij.codeInspection.ProblemDescriptor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.PsiElement;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.plugins.groovy.codeInspection.BaseInspection;
import org.jetbrains.plugins.groovy.codeInspection.BaseInspectionVisitor;
import org.jetbrains.plugins.groovy.codeInspection.GroovyFix;
import org.jetbrains.plugins.groovy.codeInspection.utils.EquivalenceChecker;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrConditionalExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
public class GroovyConditionalWithIdenticalBranchesInspection extends BaseInspection {
@Override
public boolean isEnabledByDefault() {
return true;
}
@Override
@NotNull
public String getDisplayName() {
return "Conditional expression with identical branches";
}
@Override
@NotNull
public String getGroupDisplayName() {
return CONTROL_FLOW;
}
@Override
public String buildErrorString(Object... args) {
return "Conditional expression with identical branches #loc";
}
@Override
public GroovyFix buildFix(PsiElement location) {
return new CollapseConditionalFix();
}
private static class CollapseConditionalFix extends GroovyFix {
@Override
@NotNull
public String getName() {
return "Collapse conditional expression";
}
@Override
public void doFix(Project project, ProblemDescriptor descriptor) throws IncorrectOperationException {
final PsiElement element = descriptor.getPsiElement();
if (!(element instanceof GrConditionalExpression)) return;
final GrConditionalExpression expression = (GrConditionalExpression)element;
final GrExpression thenBranch = expression.getThenBranch();
replaceExpression(expression, thenBranch.getText());
}
}
@Override
public BaseInspectionVisitor buildVisitor() {
return new Visitor();
}
private static class Visitor extends BaseInspectionVisitor {
@Override
public void visitConditionalExpression(GrConditionalExpression expression) {
super.visitConditionalExpression(expression);
final GrExpression thenBranch = expression.getThenBranch();
final GrExpression elseBranch = expression.getElseBranch();
if (thenBranch == null || elseBranch == null) {
return;
}
if (EquivalenceChecker.expressionsAreEquivalent(thenBranch, elseBranch)) {
registerStatementError(expression);
}
}
}
}
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