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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.intellij.refactoring.typeCook.deductive;
import com.intellij.psi.*;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.util.PsiUtil;
import org.jetbrains.annotations.NotNull;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
/**
* @author db
*/
public class PsiTypeVariableFactory {
private int myCurrent = 0;
private final LinkedList<HashSet<PsiTypeVariable>> myClusters = new LinkedList<HashSet<PsiTypeVariable>>();
private final HashMap<Integer, HashSet<PsiTypeVariable>> myVarCluster = new HashMap<Integer, HashSet<PsiTypeVariable>>();
public final int getNumber() {
return myCurrent;
}
public final void registerCluster(final HashSet<PsiTypeVariable> cluster) {
myClusters.add(cluster);
for (final PsiTypeVariable aCluster : cluster) {
myVarCluster.put(new Integer(aCluster.getIndex()), cluster);
}
}
public final LinkedList<HashSet<PsiTypeVariable>> getClusters() {
return myClusters;
}
public final HashSet<PsiTypeVariable> getClusterOf(final int var) {
return myVarCluster.get(new Integer(var));
}
public final PsiTypeVariable create() {
return create(null);
}
public final PsiTypeVariable create(final PsiElement context) {
return new PsiTypeVariable() {
private final int myIndex = myCurrent++;
private final PsiElement myContext = context;
@Override
public boolean isValidInContext(final PsiType type) {
if (myContext == null) {
return true;
}
if (type == null) {
return true;
}
return type.accept(new PsiTypeVisitor<Boolean>() {
@Override
public Boolean visitType(final PsiType type) {
return Boolean.TRUE;
}
@Override
public Boolean visitArrayType(final PsiArrayType arrayType) {
return arrayType.getDeepComponentType().accept(this);
}
@Override
public Boolean visitWildcardType(final PsiWildcardType wildcardType) {
final PsiType bound = wildcardType.getBound();
if (bound != null) {
bound.accept(this);
}
return Boolean.TRUE;
}
@Override
public Boolean visitClassType(final PsiClassType classType) {
final PsiClassType.ClassResolveResult result = classType.resolveGenerics();
final PsiClass aClass = result.getElement();
final PsiSubstitutor aSubst = result.getSubstitutor();
if (aClass != null) {
final PsiManager manager = aClass.getManager();
final JavaPsiFacade facade = JavaPsiFacade.getInstance(manager.getProject());
if (aClass instanceof PsiTypeParameter) {
final PsiTypeParameterListOwner owner = PsiTreeUtil.getParentOfType(myContext, PsiTypeParameterListOwner.class);
if (owner != null) {
boolean found = false;
for (PsiTypeParameter typeParameter : PsiUtil.typeParametersIterable(owner)) {
found = manager.areElementsEquivalent(typeParameter, aClass);
if (found) break;
}
if (!found) {
return Boolean.FALSE;
}
}
else {
return Boolean.FALSE;
}
}
else if (!facade.getResolveHelper().isAccessible(aClass, myContext, null)) {
return Boolean.FALSE;
}
for (PsiTypeParameter parm : PsiUtil.typeParametersIterable(aClass)) {
final PsiType type = aSubst.substitute(parm);
if (type != null) {
final Boolean b = type.accept(this);
if (!b.booleanValue()) {
return Boolean.FALSE;
}
}
}
return Boolean.TRUE;
}
else {
return Boolean.FALSE;
}
}
}).booleanValue();
}
@Override
@NotNull
public String getPresentableText() {
return "$" + myIndex;
}
@Override
@NotNull
public String getCanonicalText() {
return getPresentableText();
}
@Override
@NotNull
public String getInternalCanonicalText() {
return getCanonicalText();
}
@Override
public boolean isValid() {
return true;
}
@Override
public boolean equalsToText(@NotNull String text) {
return text.equals(getPresentableText());
}
@Override
public GlobalSearchScope getResolveScope() {
return null;
}
@Override
@NotNull
public PsiType[] getSuperTypes() {
return EMPTY_ARRAY;
}
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof PsiTypeVariable)) return false;
final PsiTypeVariable psiTypeVariable = (PsiTypeVariable)o;
if (myIndex != psiTypeVariable.getIndex()) return false;
return true;
}
public int hashCode() {
return myIndex;
}
@Override
public int getIndex() {
return myIndex;
}
};
}
}
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