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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.exception;
import com.intellij.codeInsight.intention.QuickFixFactory;
import com.intellij.codeInspection.LocalQuickFix;
import com.intellij.codeInspection.ProblemHighlightType;
import com.intellij.psi.PsiElement;
import org.jetbrains.annotations.Nls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.plugins.groovy.codeInspection.BaseInspection;
import org.jetbrains.plugins.groovy.codeInspection.BaseInspectionVisitor;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrCatchClause;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.blocks.GrOpenBlock;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.params.GrParameter;
public class GroovyUnusedCatchParameterInspection extends BaseInspection {
@Override
public boolean isEnabledByDefault() {
return true;
}
@Override
@Nls
@NotNull
public String getGroupDisplayName() {
return ERROR_HANDLING;
}
@Override
@Nls
@NotNull
public String getDisplayName() {
return "Unused catch parameter";
}
@NotNull
@Override
public BaseInspectionVisitor buildVisitor() {
return new Visitor();
}
private static class Visitor extends BaseInspectionVisitor {
@Override
public void visitCatchClause(GrCatchClause catchClause) {
super.visitCatchClause(catchClause);
final GrOpenBlock block = catchClause.getBody();
if (block == null) {
return;
}
final GrParameter parameter = catchClause.getParameter();
if (parameter == null) {
return;
}
if (GrExceptionUtil.ignore(parameter)) return;
final CatchParameterUsedVisitor visitor = new CatchParameterUsedVisitor(parameter);
block.accept(visitor);
if (!visitor.isUsed()) {
final PsiElement nameIdentifier = parameter.getNameIdentifierGroovy();
registerError(nameIdentifier, "Unused catch parameter '#ref' #loc", new LocalQuickFix[]{QuickFixFactory.getInstance().createRenameElementFix(parameter, "ignored")},
ProblemHighlightType.GENERIC_ERROR_OR_WARNING);
}
}
}
}
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