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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.fixes;
import com.intellij.codeInsight.FileModificationService;
import com.intellij.codeInspection.ProblemDescriptor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.*;
import com.intellij.psi.search.searches.ReferencesSearch;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.Query;
import com.siyeh.InspectionGadgetsBundle;
import com.siyeh.ig.InspectionGadgetsFix;
import org.jetbrains.annotations.NotNull;
import java.util.ArrayList;
import java.util.Collection;
/**
* @author Bas Leijdekkers
*/
public class ConvertToVarargsMethodFix extends InspectionGadgetsFix {
@Override
@NotNull
public String getFamilyName() {
return getName();
}
@NotNull
@Override
public String getName() {
return InspectionGadgetsBundle.message("convert.to.variable.arity.method.quickfix");
}
@Override
protected boolean prepareForWriting() {
return false;
}
@Override
protected void doFix(Project project, ProblemDescriptor descriptor) {
final PsiElement element = descriptor.getPsiElement();
final PsiElement parent = element.getParent();
if (!(parent instanceof PsiMethod)) {
return;
}
final PsiMethod method = (PsiMethod)parent;
final Collection<PsiElement> writtenElements = new ArrayList<PsiElement>();
final Collection<PsiReferenceExpression> methodCalls = new ArrayList<PsiReferenceExpression>();
writtenElements.add(method);
for (final PsiReference reference : ReferencesSearch.search(method, method.getUseScope(), false)) {
final PsiElement referenceElement = reference.getElement();
if (referenceElement instanceof PsiReferenceExpression) {
writtenElements.add(referenceElement);
methodCalls.add((PsiReferenceExpression)referenceElement);
}
}
if (!FileModificationService.getInstance().preparePsiElementsForWrite(writtenElements)) {
return;
}
makeMethodVarargs(method);
makeMethodCallsVarargs(methodCalls);
}
private static void makeMethodVarargs(PsiMethod method) {
final PsiParameterList parameterList = method.getParameterList();
if (parameterList.getParametersCount() == 0) {
return;
}
final PsiParameter[] parameters = parameterList.getParameters();
final PsiParameter lastParameter = parameters[parameters.length - 1];
final PsiType type = lastParameter.getType();
if (!(type instanceof PsiArrayType)) {
return;
}
final PsiArrayType arrayType = (PsiArrayType)type;
final PsiType componentType = arrayType.getComponentType();
final PsiElementFactory factory = JavaPsiFacade.getElementFactory(method.getProject());
final PsiType ellipsisType = PsiEllipsisType.createEllipsis(componentType, type.getAnnotations());
final PsiTypeElement newTypeElement = factory.createTypeElement(ellipsisType);
final PsiTypeElement typeElement = lastParameter.getTypeElement();
if (typeElement != null) {
typeElement.replace(newTypeElement);
}
}
private static void makeMethodCallsVarargs(Collection<PsiReferenceExpression> referenceExpressions) {
for (final PsiReferenceExpression referenceExpression : referenceExpressions) {
final PsiMethodCallExpression methodCallExpression = (PsiMethodCallExpression)referenceExpression.getParent();
final PsiExpressionList argumentList = methodCallExpression.getArgumentList();
final PsiExpression[] arguments = argumentList.getExpressions();
if (arguments.length == 0) {
continue;
}
final PsiExpression lastArgument = arguments[arguments.length - 1];
if (!(lastArgument instanceof PsiNewExpression)) {
continue;
}
final PsiNewExpression newExpression = (PsiNewExpression)lastArgument;
final PsiArrayInitializerExpression arrayInitializerExpression = newExpression.getArrayInitializer();
if (arrayInitializerExpression == null) {
continue;
}
final PsiExpression[] initializers = arrayInitializerExpression.getInitializers();
for (final PsiExpression initializer : initializers) {
argumentList.add(initializer);
}
lastArgument.delete();
}
}
}
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