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/*
* Copyright 2000-2011 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.reference;
import com.intellij.lang.Language;
import com.intellij.lang.LanguageExtension;
import com.intellij.openapi.project.IndexNotReadyException;
import com.intellij.openapi.util.Comparing;
import com.intellij.patterns.ElementPattern;
import com.intellij.psi.*;
import com.intellij.util.ProcessingContext;
import com.intellij.util.containers.ContainerUtil;
import com.intellij.util.containers.FactoryMap;
import org.jetbrains.annotations.NotNull;
import java.util.*;
public class ReferenceProvidersRegistryImpl extends ReferenceProvidersRegistry {
private static final LanguageExtension<PsiReferenceContributor> CONTRIBUTOR_EXTENSION = new LanguageExtension<PsiReferenceContributor>(PsiReferenceContributor.EP_NAME.getName());
private static final LanguageExtension<PsiReferenceProviderBean> REFERENCE_PROVIDER_EXTENSION = new LanguageExtension<PsiReferenceProviderBean>(PsiReferenceProviderBean.EP_NAME.getName());
private static final Comparator<ProviderBinding.ProviderInfo<PsiReferenceProvider, ProcessingContext>> PRIORITY_COMPARATOR =
new Comparator<ProviderBinding.ProviderInfo<PsiReferenceProvider, ProcessingContext>>() {
@Override
public int compare(ProviderBinding.ProviderInfo<PsiReferenceProvider, ProcessingContext> o1,
ProviderBinding.ProviderInfo<PsiReferenceProvider, ProcessingContext> o2) {
return Comparing.compare(o2.priority, o1.priority);
}
};
@SuppressWarnings({"MismatchedQueryAndUpdateOfCollection"})
private final Map<Language, PsiReferenceRegistrarImpl> myRegistrars = new FactoryMap<Language, PsiReferenceRegistrarImpl>() {
@Override
protected PsiReferenceRegistrarImpl create(Language language) {
PsiReferenceRegistrarImpl registrar = new PsiReferenceRegistrarImpl();
for (PsiReferenceContributor contributor : CONTRIBUTOR_EXTENSION.allForLanguage(language)) {
contributor.registerReferenceProviders(registrar);
}
List<PsiReferenceProviderBean> referenceProviderBeans = REFERENCE_PROVIDER_EXTENSION.allForLanguage(language);
for (final PsiReferenceProviderBean providerBean : referenceProviderBeans) {
final ElementPattern<PsiElement> pattern = providerBean.createElementPattern();
if (pattern != null) {
registrar.registerReferenceProvider(pattern, new PsiReferenceProvider() {
PsiReferenceProvider myProvider;
@NotNull
@Override
public PsiReference[] getReferencesByElement(@NotNull PsiElement element, @NotNull ProcessingContext context) {
if (myProvider == null) {
myProvider = providerBean.instantiate();
if (myProvider == null) {
myProvider = NULL_REFERENCE_PROVIDER;
}
}
return myProvider.getReferencesByElement(element, context);
}
});
}
}
registrar.markInitialized();
return registrar;
}
};
@Override
public synchronized PsiReferenceRegistrarImpl getRegistrar(Language language) {
return myRegistrars.get(language);
}
@Override
protected PsiReference[] doGetReferencesFromProviders(PsiElement context,
PsiReferenceService.Hints hints) {
List<ProviderBinding.ProviderInfo<PsiReferenceProvider, ProcessingContext>> providersForContextLanguage =
getRegistrar(context.getLanguage()).getPairsByElement(context, hints);
List<ProviderBinding.ProviderInfo<PsiReferenceProvider, ProcessingContext>> providersForAllLanguages =
getRegistrar(Language.ANY).getPairsByElement(context, hints);
int providersCount = providersForContextLanguage.size() + providersForAllLanguages.size();
if (providersCount == 0) {
return PsiReference.EMPTY_ARRAY;
}
if (providersCount == 1) {
final ProviderBinding.ProviderInfo<PsiReferenceProvider, ProcessingContext> firstProvider =
(providersForAllLanguages.isEmpty() ? providersForContextLanguage : providersForAllLanguages).get(0);
return firstProvider.provider.getReferencesByElement(context, firstProvider.processingContext);
}
List<ProviderBinding.ProviderInfo<PsiReferenceProvider, ProcessingContext>> list =
ContainerUtil.concat(providersForContextLanguage, providersForAllLanguages);
@SuppressWarnings("unchecked")
ProviderBinding.ProviderInfo<PsiReferenceProvider, ProcessingContext>[] providers = list.toArray(new ProviderBinding.ProviderInfo[list.size()]);
Arrays.sort(providers, PRIORITY_COMPARATOR);
List<PsiReference> result = new ArrayList<PsiReference>();
final double maxPriority = providers[0].priority;
next:
for (ProviderBinding.ProviderInfo<PsiReferenceProvider, ProcessingContext> trinity : providers) {
final PsiReference[] refs;
try {
refs = trinity.provider.getReferencesByElement(context, trinity.processingContext);
}
catch(IndexNotReadyException ex) {
continue;
}
if (trinity.priority != maxPriority) {
for (PsiReference ref : refs) {
for (PsiReference reference : result) {
if (ref != null && ReferenceRange.containsRangeInElement(reference, ref.getRangeInElement())) {
continue next;
}
}
}
}
for (PsiReference ref : refs) {
if (ref != null) {
result.add(ref);
}
}
}
return result.isEmpty() ? PsiReference.EMPTY_ARRAY : ContainerUtil.toArray(result, new PsiReference[result.size()]);
}
}
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