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.descriptors.impl;
018    
019    import com.google.common.collect.Lists;
020    import com.google.common.collect.Sets;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.jet.lang.descriptors.PackageFragmentDescriptor;
023    import org.jetbrains.jet.lang.descriptors.PackageFragmentProvider;
024    import org.jetbrains.jet.lang.resolve.name.FqName;
025    
026    import java.util.Collection;
027    import java.util.List;
028    import java.util.Set;
029    
030    public class CompositePackageFragmentProvider implements PackageFragmentProvider {
031        // can be modified from outside
032        private final List<PackageFragmentProvider> providers;
033    
034        public CompositePackageFragmentProvider(@NotNull List<PackageFragmentProvider> providers) {
035            this.providers = providers;
036        }
037    
038        @NotNull
039        @Override
040        public List<PackageFragmentDescriptor> getPackageFragments(@NotNull FqName fqName) {
041            List<PackageFragmentDescriptor> result = Lists.newArrayList();
042            for (PackageFragmentProvider provider : providers) {
043                result.addAll(provider.getPackageFragments(fqName));
044            }
045            return result;
046        }
047    
048        @NotNull
049        @Override
050        public Collection<FqName> getSubPackagesOf(@NotNull FqName fqName) {
051            Set<FqName> result = Sets.newHashSet();
052            for (PackageFragmentProvider provider : providers) {
053                result.addAll(provider.getSubPackagesOf(fqName));
054            }
055            return result;
056        }
057    }