001    /*
002     * Copyright 2010-2015 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.kotlin.load.java.components;
018    
019    import com.intellij.codeInsight.ExternalAnnotationsManager;
020    import com.intellij.psi.PsiAnnotation;
021    import com.intellij.psi.PsiModifierListOwner;
022    import org.jetbrains.annotations.NotNull;
023    import org.jetbrains.annotations.Nullable;
024    import org.jetbrains.kotlin.load.java.structure.JavaAnnotation;
025    import org.jetbrains.kotlin.load.java.structure.JavaAnnotationOwner;
026    import org.jetbrains.kotlin.load.java.structure.impl.JavaAnnotationImpl;
027    import org.jetbrains.kotlin.load.java.structure.impl.JavaElementCollectionFromPsiArrayUtil;
028    import org.jetbrains.kotlin.load.java.structure.impl.JavaModifierListOwnerImpl;
029    import org.jetbrains.kotlin.name.FqName;
030    
031    import java.util.Collection;
032    import java.util.Collections;
033    
034    public class PsiBasedExternalAnnotationResolver implements ExternalAnnotationResolver {
035        @Nullable
036        @Override
037        public JavaAnnotation findExternalAnnotation(@NotNull JavaAnnotationOwner owner, @NotNull FqName fqName) {
038            if (owner instanceof JavaModifierListOwnerImpl) {
039                JavaModifierListOwnerImpl modifierListOwner = (JavaModifierListOwnerImpl) owner;
040                PsiAnnotation psiAnnotation = findExternalAnnotation(modifierListOwner.getPsi(), fqName);
041                return psiAnnotation == null ? null : new JavaAnnotationImpl(psiAnnotation);
042            }
043            return null;
044        }
045    
046        @NotNull
047        @Override
048        public Collection<JavaAnnotation> findExternalAnnotations(@NotNull JavaAnnotationOwner owner) {
049            if (owner instanceof JavaModifierListOwnerImpl) {
050                PsiModifierListOwner psiOwner = ((JavaModifierListOwnerImpl) owner).getPsi();
051                PsiAnnotation[] annotations = ExternalAnnotationsManager.getInstance(psiOwner.getProject()).findExternalAnnotations(psiOwner);
052                return annotations == null
053                       ? Collections.<JavaAnnotation>emptyList()
054                       : JavaElementCollectionFromPsiArrayUtil.annotations(annotations);
055            }
056            return Collections.emptyList();
057        }
058    
059        @Nullable
060        public static PsiAnnotation findExternalAnnotation(@NotNull PsiModifierListOwner owner, @NotNull FqName fqName) {
061            return ExternalAnnotationsManager.getInstance(owner.getProject()).findExternalAnnotation(owner, fqName.asString());
062        }
063    }