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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 org.jetbrains.plugins.groovy.findUsages;
import com.intellij.openapi.application.AccessToken;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.application.ReadAction;
import com.intellij.openapi.util.Computable;
import com.intellij.psi.*;
import com.intellij.psi.impl.search.AnnotatedElementsSearcher;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.search.LocalSearchScope;
import com.intellij.psi.search.SearchScope;
import com.intellij.psi.search.searches.AnnotatedElementsSearch;
import com.intellij.psi.stubs.StubIndex;
import com.intellij.util.Processor;
import com.intellij.util.QueryExecutor;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.plugins.groovy.lang.psi.GroovyFile;
import org.jetbrains.plugins.groovy.lang.psi.GroovyPsiElement;
import org.jetbrains.plugins.groovy.lang.psi.GroovyRecursiveElementVisitor;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrField;
import org.jetbrains.plugins.groovy.lang.psi.api.statements.typedef.members.GrMethod;
import org.jetbrains.plugins.groovy.lang.psi.stubs.index.GrAnnotatedMemberIndex;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
/**
* @author ven
*/
public class AnnotatedMembersSearcher implements QueryExecutor<PsiModifierListOwner, AnnotatedElementsSearch.Parameters> {
@NotNull
private static List<PsiModifierListOwner> getAnnotatedMemberCandidates(final PsiClass clazz, final GlobalSearchScope scope) {
final String name = clazz.getName();
if (name == null) return Collections.emptyList();
final Collection<PsiElement> members = ApplicationManager.getApplication().runReadAction(new Computable<Collection<PsiElement>>() {
@Override
public Collection<PsiElement> compute() {
return StubIndex.getElements(GrAnnotatedMemberIndex.KEY, name, clazz.getProject(), scope, PsiElement.class);
}
});
if (members.isEmpty()) {
return Collections.emptyList();
}
final ArrayList<PsiModifierListOwner> result = new ArrayList<PsiModifierListOwner>();
for (PsiElement element : members) {
if (element instanceof GroovyFile) {
element = ((GroovyFile)element).getPackageDefinition();
}
if (element instanceof PsiModifierListOwner) {
result.add((PsiModifierListOwner)element);
}
}
return result;
}
@Override
public boolean execute(@NotNull final AnnotatedElementsSearch.Parameters p, @NotNull final Processor<PsiModifierListOwner> consumer) {
final PsiClass annClass = p.getAnnotationClass();
assert annClass.isAnnotationType() : "Annotation type should be passed to annotated members search";
AccessToken token = ReadAction.start();
final String annotationFQN;
try {
annotationFQN = annClass.getQualifiedName();
}
finally {
token.finish();
}
assert annotationFQN != null;
final SearchScope scope = p.getScope();
final List<PsiModifierListOwner> candidates;
if (scope instanceof GlobalSearchScope) {
candidates = getAnnotatedMemberCandidates(annClass, ((GlobalSearchScope)scope));
} else {
candidates = new ArrayList<PsiModifierListOwner>();
for (PsiElement element : ((LocalSearchScope)scope).getScope()) {
if (element instanceof GroovyPsiElement) {
((GroovyPsiElement)element).accept(new GroovyRecursiveElementVisitor() {
@Override
public void visitMethod(GrMethod method) {
candidates.add(method);
}
@Override
public void visitField(GrField field) {
candidates.add(field);
}
});
}
}
}
for (PsiModifierListOwner candidate : candidates) {
token = ReadAction.start();
try {
if (!AnnotatedElementsSearcher.isInstanceof(candidate, p.getTypes())) {
continue;
}
PsiModifierList list = candidate.getModifierList();
if (list != null) {
for (PsiAnnotation annotation : list.getAnnotations()) {
if (annotationFQN.equals(annotation.getQualifiedName()) && !consumer.process(candidate)) {
return false;
}
}
}
}
finally {
token.finish();
}
}
return true;
}
}
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