001    /*
002     * Copyright 2010-2014 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.descriptors.annotations;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.annotations.Nullable;
021    import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
022    import org.jetbrains.jet.lang.descriptors.ClassifierDescriptor;
023    import org.jetbrains.jet.lang.resolve.DescriptorUtils;
024    import org.jetbrains.jet.lang.resolve.name.FqName;
025    
026    import java.util.Iterator;
027    import java.util.List;
028    
029    public class AnnotationsImpl implements Annotations {
030        private final List<AnnotationDescriptor> annotations;
031    
032        public AnnotationsImpl(@NotNull List<AnnotationDescriptor> annotations) {
033            this.annotations = annotations;
034        }
035    
036        @NotNull
037        public List<AnnotationDescriptor> getAnnotationDescriptors() {
038            return annotations;
039        }
040    
041        @Override
042        public boolean isEmpty() {
043            return getAnnotationDescriptors().isEmpty();
044        }
045    
046        @Nullable
047        @Override
048        public AnnotationDescriptor findAnnotation(@NotNull FqName fqName) {
049            for (AnnotationDescriptor annotation : annotations) {
050                ClassifierDescriptor descriptor = annotation.getType().getConstructor().getDeclarationDescriptor();
051                if (descriptor instanceof ClassDescriptor && fqName.toUnsafe().equals(DescriptorUtils.getFqName(descriptor))) {
052                    return annotation;
053                }
054            }
055            return null;
056        }
057    
058        @NotNull
059        @Override
060        public Iterator<AnnotationDescriptor> iterator() {
061            return getAnnotationDescriptors().iterator();
062        }
063    }