/*
* 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;
import com.intellij.psi.*;
import com.intellij.psi.scope.MethodProcessorSetupFailedException;
import com.intellij.psi.scope.processor.MethodCandidatesProcessor;
import com.intellij.psi.scope.util.PsiScopesUtil;
import com.intellij.psi.util.PsiUtil;
import org.jetbrains.annotations.NotNull;
import java.util.*;
/**
* User: anna
* Date: 2/14/13
*/
public class GraphInferencePolicy extends ProcessCandidateParameterTypeInferencePolicy {
private static final ThreadLocal<Map<PsiExpression, Map<JavaResolveResult, PsiSubstitutor>>> ourResults = new ThreadLocal<Map<PsiExpression, Map<JavaResolveResult, PsiSubstitutor>>>() {
@Override
protected Map<PsiExpression, Map<JavaResolveResult, PsiSubstitutor>> initialValue() {
return new WeakHashMap<PsiExpression, Map<JavaResolveResult, PsiSubstitutor>>();
}
};
@Override
protected List<PsiExpression> getExpressions(PsiExpression[] expressions, int i) {
final List<PsiExpression> list = Arrays.asList(expressions);
list.set(i, null);
return list;
}
@Override
protected PsiSubstitutor getSubstitutor(PsiCallExpression contextCall, PsiExpression[] expressions, int i, JavaResolveResult result) {
Map<JavaResolveResult, PsiSubstitutor> map = ourResults.get().get(contextCall);
if (map != null) {
final PsiSubstitutor substitutor = map.get(result);
if (substitutor != PsiSubstitutor.UNKNOWN && substitutor != null && substitutor.isValid()) return substitutor;
}
final PsiSubstitutor substitutor = super.getSubstitutor(contextCall, expressions, i, result);
if (map != null) {
map.put(result, substitutor);
}
return substitutor;
}
@NotNull
@Override
protected JavaResolveResult[] getResults(@NotNull PsiCallExpression contextCall, final int exprIdx)
throws MethodProcessorSetupFailedException {
Map<JavaResolveResult, PsiSubstitutor> map = ourResults.get().get(contextCall);
if (map != null) {
final Set<JavaResolveResult> results = map.keySet();
return results.toArray(new JavaResolveResult[results.size()]);
}
PsiFile containingFile = contextCall.getContainingFile();
final MethodCandidatesProcessor processor = new MethodCandidatesProcessor(contextCall, containingFile) {
@Override
protected PsiType[] getExpressionTypes(PsiExpressionList argumentList) {
if (argumentList != null) {
final PsiExpression[] expressions = argumentList.getExpressions();
final PsiType[] types = new PsiType[expressions.length];
for (int i = 0; i < expressions.length; i++) {
if (i != exprIdx) {
types[i] = expressions[i].getType();
}
else {
types[i] = PsiType.NULL;
}
}
return types;
}
else {
return null;
}
}
};
PsiScopesUtil.setupAndRunProcessor(processor, contextCall, false);
final JavaResolveResult[] results = processor.getResult();
map = new WeakHashMap<JavaResolveResult, PsiSubstitutor>();
ourResults.get().put(contextCall, map);
for (JavaResolveResult result : results) {
map.put(result, PsiSubstitutor.UNKNOWN);
}
return results;
}
public static void forget(PsiElement parent) {
if (parent instanceof PsiExpression) {
PsiElement gParent = PsiUtil.skipParenthesizedExprUp(parent.getParent());
if (gParent instanceof PsiExpressionList) {
final PsiElement ggParent = gParent.getParent();
if (ggParent instanceof PsiCallExpression) {
ourResults.get().remove(ggParent);
}
}
}
}
}