/*
* Copyright 2000-2009 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.intellij.refactoring.extractMethod;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.util.Key;
import com.intellij.psi.*;
import com.intellij.psi.search.SearchScope;
import com.intellij.psi.search.searches.ClassInheritorsSearch;
import com.intellij.psi.search.searches.ReferencesSearch;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.util.RedundantCastUtil;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.Processor;
import com.intellij.util.containers.HashMap;
import org.jetbrains.annotations.NotNull;
import java.util.Map;
/**
* @author ven
*/
public class ExtractMethodUtil {
private static final Key<PsiMethod> RESOLVE_TARGET_KEY = Key.create("RESOLVE_TARGET_KEY");
private static final Logger LOG = Logger.getInstance("com.intellij.refactoring.extractMethod.ExtractMethodUtil");
private ExtractMethodUtil() { }
static Map<PsiMethodCallExpression, PsiMethod> encodeOverloadTargets(final PsiClass targetClass,
final SearchScope processConflictsScope,
final String overloadName,
final PsiElement extractedFragment) {
final Map<PsiMethodCallExpression, PsiMethod> ret = new HashMap<>();
encodeInClass(targetClass, overloadName, extractedFragment, ret);
ClassInheritorsSearch.search(targetClass, processConflictsScope, true).forEach(inheritor -> {
encodeInClass(inheritor, overloadName, extractedFragment, ret);
return true;
});
return ret;
}
private static void encodeInClass(final PsiClass aClass,
final String overloadName,
final PsiElement extractedFragment,
final Map<PsiMethodCallExpression, PsiMethod> ret) {
final PsiMethod[] overloads = aClass.findMethodsByName(overloadName, false);
for (final PsiMethod overload : overloads) {
for (final PsiReference ref : ReferencesSearch.search(overload)) {
final PsiElement element = ref.getElement();
final PsiElement parent = element.getParent();
if (parent instanceof PsiMethodCallExpression) {
final PsiMethodCallExpression call = (PsiMethodCallExpression)parent;
if (PsiTreeUtil.isAncestor(extractedFragment, element, false)) {
call.putCopyableUserData(RESOLVE_TARGET_KEY, overload);
} else {
//we assume element won't be invalidated as a result of extraction
ret.put(call, overload);
}
}
}
}
}
public static void decodeOverloadTargets(Map<PsiMethodCallExpression, PsiMethod> oldResolves, final PsiMethod extracted,
final PsiElement oldFragment) {
final PsiCodeBlock body = extracted.getBody();
assert body != null;
final JavaRecursiveElementVisitor visitor = new JavaRecursiveElementVisitor() {
@Override public void visitMethodCallExpression(PsiMethodCallExpression expression) {
super.visitMethodCallExpression(expression);
final PsiMethod target = expression.getCopyableUserData(RESOLVE_TARGET_KEY);
if (target != null) {
expression.putCopyableUserData(RESOLVE_TARGET_KEY, null);
try {
addCastsToEnsureResolveTarget(target, expression);
}
catch (IncorrectOperationException e) {
LOG.error(e);
}
}
}
};
body.accept(visitor);
oldFragment.accept(visitor);
for (final Map.Entry<PsiMethodCallExpression, PsiMethod> entry : oldResolves.entrySet()) {
try {
addCastsToEnsureResolveTarget(entry.getValue(), entry.getKey());
}
catch (IncorrectOperationException e) {
LOG.error(e);
}
}
}
public static void addCastsToEnsureResolveTarget(@NotNull final PsiMethod oldTarget, @NotNull final PsiMethodCallExpression call)
throws IncorrectOperationException {
final PsiMethod newTarget = call.resolveMethod();
final PsiManager manager = oldTarget.getManager();
final PsiElementFactory factory = JavaPsiFacade.getInstance(manager.getProject()).getElementFactory();
if (!manager.areElementsEquivalent(oldTarget, newTarget)) {
final PsiParameter[] oldParameters = oldTarget.getParameterList().getParameters();
if (oldParameters.length > 0) {
final PsiMethodCallExpression copy = (PsiMethodCallExpression)call.copy();
final PsiExpression[] args = copy.getArgumentList().getExpressions();
for (int i = 0; i < args.length; i++) {
PsiExpression arg = args[i];
PsiType paramType = i < oldParameters.length ? oldParameters[i].getType() : oldParameters[oldParameters.length - 1].getType();
final PsiTypeCastExpression cast = (PsiTypeCastExpression)factory.createExpressionFromText("(a)b", null);
final PsiTypeElement typeElement = cast.getCastType();
assert typeElement != null;
typeElement.replace(factory.createTypeElement(paramType));
final PsiExpression operand = cast.getOperand();
assert operand != null;
operand.replace(arg);
arg.replace(cast);
}
for (int i = 0; i < copy.getArgumentList().getExpressions().length; i++) {
PsiExpression oldarg = call.getArgumentList().getExpressions()[i];
PsiTypeCastExpression cast = (PsiTypeCastExpression)copy.getArgumentList().getExpressions()[i];
if (!RedundantCastUtil.isCastRedundant(cast)) {
oldarg.replace(cast);
}
}
}
}
}
}