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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.psi.util.PsiTreeUtil;
import com.intellij.util.IncorrectOperationException;
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.codeInspection.GroovyFix;
import org.jetbrains.plugins.groovy.codeInspection.utils.ControlFlowUtils;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.blocks.GrClosableBlock;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.branch.GrReturnStatement;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.members.GrMethod;
public class GroovyReturnFromClosureCanBeImplicitInspection extends BaseInspection {
@Override
@Nls
@NotNull
public String getGroupDisplayName() {
return CONTROL_FLOW;
}
@Override
@Nls
@NotNull
public String getDisplayName() {
return "'return' statement can be implicit";
}
@Override
@Nullable
protected String buildErrorString(Object... args) {
return "#ref statement at end of a closure can be made implicit #loc";
}
@Override
public BaseInspectionVisitor buildVisitor() {
return new Visitor();
}
@Override
@Nullable
protected GroovyFix buildFix(PsiElement location) {
return new MakeReturnImplicitFix();
}
private static class MakeReturnImplicitFix extends GroovyFix {
@Override
@NotNull
public String getName() {
return "Make return implicit";
}
@Override
public void doFix(Project project, ProblemDescriptor descriptor) throws IncorrectOperationException {
final PsiElement returnKeywordElement = descriptor.getPsiElement();
final GrReturnStatement returnStatement = (GrReturnStatement) returnKeywordElement.getParent();
if (returnStatement == null) return;
if (returnStatement.getReturnValue() == null) return;
replaceStatement(returnStatement, returnStatement.getReturnValue().getText());
}
}
private static class Visitor extends BaseInspectionVisitor {
@Override
public void visitReturnStatement(GrReturnStatement returnStatement) {
super.visitReturnStatement(returnStatement);
final GrExpression returnValue = returnStatement.getReturnValue();
if (returnValue == null) {
return;
}
final GrClosableBlock closure =
PsiTreeUtil.getParentOfType(returnStatement, GrClosableBlock.class);
if (closure == null) {
return;
}
final GrMethod containingMethod =
PsiTreeUtil.getParentOfType(returnStatement, GrMethod.class);
if (containingMethod != null && PsiTreeUtil.isAncestor(closure, containingMethod, true)) {
return;
}
if (!ControlFlowUtils.closureCompletesWithStatement(closure, returnStatement)) {
return;
}
registerStatementError(returnStatement);
}
}
}
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