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.lazy.declarations;
018    
019    import com.intellij.openapi.util.Computable;
020    import com.intellij.psi.NavigatablePsiElement;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.jet.lang.psi.JetDeclaration;
023    import org.jetbrains.jet.lang.psi.JetFile;
024    import org.jetbrains.jet.lang.resolve.lazy.storage.NotNullLazyValue;
025    import org.jetbrains.jet.lang.resolve.lazy.storage.StorageManager;
026    import org.jetbrains.jet.lang.resolve.name.FqName;
027    import org.jetbrains.jet.lang.resolve.name.Name;
028    
029    import java.util.Collection;
030    
031    public class FileBasedPackageMemberDeclarationProvider extends AbstractPsiBasedDeclarationProvider implements PackageMemberDeclarationProvider {
032    
033        private final FqName fqName;
034        private final FileBasedDeclarationProviderFactory factory;
035        private final Collection<JetFile> packageFiles;
036        private final NotNullLazyValue<Collection<FqName>> allDeclaredPackages;
037    
038    
039        /*package*/ FileBasedPackageMemberDeclarationProvider(
040                @NotNull StorageManager storageManager,
041                @NotNull FqName _fqName,
042                @NotNull FileBasedDeclarationProviderFactory _factory,
043                @NotNull Collection<JetFile> packageFiles
044        ) {
045            super(storageManager);
046            this.fqName = _fqName;
047            this.factory = _factory;
048            this.packageFiles = packageFiles;
049            this.allDeclaredPackages = storageManager.createLazyValue(new Computable<Collection<FqName>>() {
050                @Override
051                public Collection<FqName> compute() {
052                    return factory.getAllDeclaredSubPackagesOf(fqName);
053                }
054            });
055        }
056    
057        @Override
058        protected void doCreateIndex(@NotNull Index index) {
059            for (JetFile file : packageFiles) {
060                for (JetDeclaration declaration : file.getDeclarations()) {
061                    assert fqName.asString().equals(file.getPackageName()) : "Files declaration utils contains file with invalid namespace";
062                    index.putToIndex(declaration);
063                }
064            }
065        }
066    
067        @Override
068        public boolean isPackageDeclared(@NotNull Name name) {
069            return factory.isPackageDeclared(fqName.child(name));
070        }
071    
072        @Override
073        public Collection<FqName> getAllDeclaredPackages() {
074            return allDeclaredPackages.compute();
075        }
076    
077        @NotNull
078        @Override
079        public Collection<NavigatablePsiElement> getPackageDeclarations(FqName fqName) {
080            return factory.getPackageDeclarations(fqName);
081        }
082    
083        @Override
084        public String toString() {
085            return "Declarations for package " + fqName;
086        }
087    }