001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.jet.lang.resolve.java.resolver;
018    
019    import com.intellij.codeInsight.ExternalAnnotationsManager;
020    import com.intellij.psi.PsiAnnotation;
021    import com.intellij.psi.PsiModifierList;
022    import com.intellij.psi.PsiModifierListOwner;
023    import org.jetbrains.annotations.NotNull;
024    import org.jetbrains.annotations.Nullable;
025    import org.jetbrains.jet.lang.resolve.java.JvmClassName;
026    import org.jetbrains.jet.lang.resolve.java.structure.JavaAnnotation;
027    import org.jetbrains.jet.lang.resolve.java.structure.JavaAnnotationOwner;
028    import org.jetbrains.jet.lang.resolve.java.structure.impl.JavaAnnotationImpl;
029    import org.jetbrains.jet.lang.resolve.java.structure.impl.JavaAnnotationOwnerImpl;
030    import org.jetbrains.jet.lang.resolve.java.structure.impl.JavaElementCollectionFromPsiArrayUtil;
031    import org.jetbrains.jet.lang.resolve.name.FqName;
032    
033    import java.util.Collection;
034    import java.util.Collections;
035    
036    public class PsiBasedExternalAnnotationResolver implements ExternalAnnotationResolver {
037        @Nullable
038        @Override
039        public JavaAnnotation findExternalAnnotation(@NotNull JavaAnnotationOwner owner, @NotNull FqName fqName) {
040            PsiAnnotation psiAnnotation = findExternalAnnotation(((JavaAnnotationOwnerImpl) owner).getPsi(), fqName);
041            return psiAnnotation == null ? null : new JavaAnnotationImpl(psiAnnotation);
042        }
043    
044        @NotNull
045        @Override
046        public Collection<JavaAnnotation> findExternalAnnotations(@NotNull JavaAnnotationOwner owner) {
047            PsiModifierListOwner psiOwner = ((JavaAnnotationOwnerImpl) owner).getPsi();
048            PsiAnnotation[] annotations = ExternalAnnotationsManager.getInstance(psiOwner.getProject()).findExternalAnnotations(psiOwner);
049            return annotations == null
050                   ? Collections.<JavaAnnotation>emptyList()
051                   : JavaElementCollectionFromPsiArrayUtil.annotations(annotations);
052        }
053    
054        @Nullable
055        public static PsiAnnotation findExternalAnnotation(@NotNull PsiModifierListOwner owner, @NotNull FqName fqName) {
056            return ExternalAnnotationsManager.getInstance(owner.getProject()).findExternalAnnotation(owner, fqName.asString());
057        }
058    
059        @Nullable
060        public static PsiAnnotation findOwnAnnotation(@NotNull PsiModifierListOwner owner, @NotNull JvmClassName name) {
061            PsiModifierList list = owner.getModifierList();
062            return list == null ? null : list.findAnnotation(name.getFqName().asString());
063        }
064    }