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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.psi;
import com.intellij.openapi.util.Comparing;
import com.intellij.psi.search.GlobalSearchScope;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
/**
* @author ven
*/
public class PsiCapturedWildcardType extends PsiType.Stub {
@NotNull private final PsiWildcardType myExistential;
@NotNull private final PsiElement myContext;
@Nullable private final PsiTypeParameter myParameter;
private PsiType myUpperBound;
@NotNull
public static PsiCapturedWildcardType create(@NotNull PsiWildcardType existential, @NotNull PsiElement context) {
return create(existential, context, null);
}
@NotNull
public static PsiCapturedWildcardType create(@NotNull PsiWildcardType existential,
@NotNull PsiElement context,
@Nullable PsiTypeParameter parameter) {
return new PsiCapturedWildcardType(existential, context, parameter);
}
private PsiCapturedWildcardType(@NotNull PsiWildcardType existential,
@NotNull PsiElement context,
@Nullable PsiTypeParameter parameter) {
super(PsiAnnotation.EMPTY_ARRAY);
myExistential = existential;
myContext = context;
myParameter = parameter;
if (parameter != null) {
final PsiClassType[] boundTypes = parameter.getExtendsListTypes();
if (boundTypes.length > 0) {
PsiType result = null;
for (PsiType type : boundTypes) {
if (result == null) {
result = type;
}
else {
result = GenericsUtil.getGreatestLowerBound(result, type);
}
}
myUpperBound = result;
}
}
}
@Override
public boolean equals(Object o) {
if (!(o instanceof PsiCapturedWildcardType)) {
return false;
}
final PsiCapturedWildcardType captured = (PsiCapturedWildcardType)o;
if (!myContext.equals(captured.myContext) || !myExistential.equals(captured.myExistential)) {
return false;
}
if (myContext instanceof PsiReferenceExpression && !Comparing.equal(myParameter, captured.myParameter)) {
return false;
}
return true;
}
@Override
public int hashCode() {
return myExistential.hashCode() + 31 * myContext.hashCode();
}
@NotNull
@Override
public String getPresentableText() {
return myExistential.getPresentableText();
}
@NotNull
@Override
public String getCanonicalText(boolean annotated) {
return myExistential.getCanonicalText(annotated);
}
@NotNull
@Override
public String getInternalCanonicalText() {
return "capture<" + myExistential.getInternalCanonicalText() + '>';
}
@Override
public boolean isValid() {
return myExistential.isValid();
}
@Override
public boolean equalsToText(@NotNull String text) {
return false;
}
@Override
public <A> A accept(@NotNull PsiTypeVisitor<A> visitor) {
return visitor.visitCapturedWildcardType(this);
}
@NotNull
@Override
public GlobalSearchScope getResolveScope() {
return myExistential.getResolveScope();
}
@Override
@NotNull
public PsiType[] getSuperTypes() {
return myExistential.getSuperTypes();
}
public PsiType getLowerBound () {
return myExistential.isSuper() ? myExistential.getBound() : NULL;
}
public PsiType getUpperBound () {
final PsiType bound = myExistential.getBound();
if (myExistential.isExtends()) {
return bound;
}
else if (bound instanceof PsiCapturedWildcardType) {
return PsiWildcardType.createSuper(myContext.getManager(), ((PsiCapturedWildcardType)bound).getUpperBound());
}
else {
return myUpperBound != null ? myUpperBound : PsiType.getJavaLangObject(myContext.getManager(), getResolveScope());
}
}
public void setUpperBound(PsiType upperBound) {
myUpperBound = upperBound;
}
@NotNull
public PsiWildcardType getWildcard() {
return myExistential;
}
@NotNull
public PsiElement getContext() {
return myContext;
}
public PsiTypeParameter getTypeParameter() {
return myParameter;
}
}
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