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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.psi.impl.source.resolve.graphInference;
import com.intellij.psi.*;
import com.intellij.psi.impl.light.LightTypeParameter;
import java.util.*;
/**
* User: anna
*/
public class InferenceVariable extends LightTypeParameter {
private PsiElement myContext;
public PsiTypeParameter getParameter() {
return getDelegate();
}
private boolean myThrownBound = false;
private final Map<InferenceBound, List<PsiType>> myBounds = new HashMap<InferenceBound, List<PsiType>>();
private PsiType myInstantiation = PsiType.NULL;
InferenceVariable(PsiElement context, PsiTypeParameter parameter) {
super(parameter);
myContext = context;
}
public PsiType getInstantiation() {
return myInstantiation;
}
public void setInstantiation(PsiType instantiation) {
myInstantiation = instantiation;
}
public boolean addBound(PsiType classType, InferenceBound inferenceBound) {
List<PsiType> list = myBounds.get(inferenceBound);
if (list == null) {
list = new ArrayList<PsiType>();
myBounds.put(inferenceBound, list);
}
final int idx = list.indexOf(classType);
if (idx < 0) {
list.add(classType);
return true;
}
return false;
}
public List<PsiType> getBounds(InferenceBound inferenceBound) {
final List<PsiType> bounds = myBounds.get(inferenceBound);
return bounds != null ? new ArrayList<PsiType>(bounds) : Collections.<PsiType>emptyList();
}
public Set<InferenceVariable> getDependencies(InferenceSession session) {
final Set<InferenceVariable> dependencies = new LinkedHashSet<InferenceVariable>();
for (List<PsiType> boundTypes : myBounds.values()) {
if (boundTypes != null) {
for (PsiType bound : boundTypes) {
session.collectDependencies(bound, dependencies);
}
}
}
next:
for (InferenceVariable variable : session.getInferenceVariables()) {
if (!dependencies.contains(variable) && variable != this) {
nextBound:
for (List<PsiType> bounds : myBounds.values()) { //todo
if (bounds != null) {
for (PsiType bound : bounds) {
final Set<InferenceVariable> deps = new HashSet<InferenceVariable>();
session.collectDependencies(bound, deps);
if (deps.isEmpty()) {
continue nextBound;
}
if (deps.contains(this)) {
dependencies.add(variable);
continue next;
}
}
}
}
}
}
if (!session.hasCapture(this)) {
return dependencies;
}
for (Iterator<InferenceVariable> iterator = dependencies.iterator(); iterator.hasNext(); ) {
if (!session.hasCapture(iterator.next())) {
iterator.remove();
}
}
session.collectCaptureDependencies(this, dependencies);
return dependencies;
}
public boolean hasInstantiation(InferenceSession session) {
List<PsiType> bounds = getBounds(InferenceBound.EQ);
if (bounds != null) {
for (PsiType bound : bounds) {
if (session.isProperType(bound)) return true;
}
}
return false;
}
public boolean isThrownBound() {
return myThrownBound;
}
public void setThrownBound() {
myThrownBound = true;
}
@Override
public boolean isEquivalentTo(PsiElement another) {
return this == another || getDelegate() == another;
}
@Override
public boolean useDelegateToSubstitute() {
return false;
}
@Override
public String toString() {
return getDelegate().toString();
}
public PsiElement getCallContext() {
return myContext;
}
}
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