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/*
* Copyright 2000-2014 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.typeCook.deductive.builder;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.psi.*;
import com.intellij.psi.util.PsiUtil;
import com.intellij.refactoring.RefactoringBundle;
import com.intellij.refactoring.typeCook.Settings;
import com.intellij.refactoring.typeCook.Util;
import com.intellij.refactoring.typeCook.deductive.resolver.Binding;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NonNls;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
/**
* @author db
*/
public class Result {
private static final Logger LOG = Logger.getInstance("#com.intellij.refactoring.typeCook.deductive.builder.Result");
private final Set<PsiElement> myVictims;
private final Map<PsiElement, PsiType> myTypes;
private final Settings mySettings;
private final Map<PsiTypeCastExpression, PsiType> myCastToOperandType;
private int myCookedNumber = -1;
private int myCastsRemoved = -1;
private final int myCastsNumber;
private Binding myBinding;
public Result(final ReductionSystem system) {
myVictims = system.myElements;
myTypes = system.myTypes;
mySettings = system.mySettings;
myCastToOperandType = system.myCastToOperandType;
myCastsNumber = myCastToOperandType.size();
}
public void incorporateSolution(final Binding binding) {
if (myBinding == null) {
myBinding = binding;
}
else {
myBinding.merge(binding, mySettings.leaveObjectParameterizedTypesRaw());
}
}
public PsiType getCookedType(final PsiElement element) {
final PsiType originalType = Util.getType(element);
if (myBinding != null) {
final PsiType type = myBinding.substitute(myTypes.get(element));
@NonNls final String objectFQName = CommonClassNames.JAVA_LANG_OBJECT;
if (originalType.getCanonicalText().equals(objectFQName)) {
if (type == null) {
return originalType;
}
if (type instanceof PsiWildcardType){
final PsiType bound = ((PsiWildcardType)type).getBound();
if (bound != null){
return bound;
}
return originalType;
}
}
return type;
}
return originalType;
}
public Set<PsiElement> getCookedElements() {
myCookedNumber = 0;
final Set<PsiElement> set = new HashSet<PsiElement>();
for (final PsiElement element : myVictims) {
final PsiType originalType = Util.getType(element);
final PsiType cookedType = getCookedType(element);
if (cookedType != null && !originalType.equals(cookedType)) {
set.add(element);
myCookedNumber++;
}
}
if (mySettings.dropObsoleteCasts()) {
myCastsRemoved = 0;
if (myBinding != null) {
for (final Map.Entry<PsiTypeCastExpression,PsiType> entry : myCastToOperandType.entrySet()) {
final PsiTypeCastExpression cast = entry.getKey();
final PsiType operandType = myBinding.apply(entry.getValue());
final PsiType castType = cast.getType();
if (!(operandType instanceof PsiTypeVariable) && castType != null && !isBottomArgument(operandType) && castType.isAssignableFrom(operandType)) {
set.add(cast);
}
}
}
}
return set;
}
private static boolean isBottomArgument(final PsiType type) {
final PsiClassType.ClassResolveResult resolveResult = PsiUtil.resolveGenericsClassInType(type);
final PsiClass clazz = resolveResult.getElement();
if (clazz != null) {
for (PsiTypeParameter typeParameter : PsiUtil.typeParametersIterable(clazz)) {
final PsiType t = resolveResult.getSubstitutor().substitute(typeParameter);
if (t == Bottom.BOTTOM) return true;
}
}
return false;
}
public void apply(final Set<PsiElement> victims) {
for (final PsiElement element : victims) {
if (element instanceof PsiTypeCastExpression && myCastToOperandType.containsKey(element)) {
final PsiTypeCastExpression cast = ((PsiTypeCastExpression)element);
try {
cast.replace(cast.getOperand());
myCastsRemoved++;
}
catch (IncorrectOperationException e1) {
LOG.error(e1);
}
} else {
Util.changeType(element, getCookedType(element));
}
}
}
private String getRatio(final int x, final int y) {
final String ratio = RefactoringBundle.message("type.cook.ratio.generified", x, y);
return ratio + (y != 0 ? " (" + (x * 100 / y) + "%)" : "");
}
public String getReport() {
return RefactoringBundle.message("type.cook.report", getRatio(myCookedNumber, myVictims.size()),
getRatio(myCastsRemoved, myCastsNumber));
}
}
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