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 org.jetbrains.annotations.NotNull;
020    import org.jetbrains.jet.lang.psi.JetClassOrObject;
021    import org.jetbrains.jet.lang.psi.JetDeclaration;
022    import org.jetbrains.jet.lang.psi.JetNamedFunction;
023    import org.jetbrains.jet.lang.psi.JetProperty;
024    import org.jetbrains.jet.lang.resolve.name.FqName;
025    import org.jetbrains.jet.lang.resolve.name.Name;
026    
027    import java.util.Collection;
028    import java.util.Collections;
029    import java.util.List;
030    
031    public class EmptyPackageMemberDeclarationProvider implements PackageMemberDeclarationProvider {
032    
033        public static final EmptyPackageMemberDeclarationProvider INSTANCE = new EmptyPackageMemberDeclarationProvider();
034    
035        private EmptyPackageMemberDeclarationProvider() {}
036    
037        @Override
038        public boolean isPackageDeclared(@NotNull Name name) {
039            return false;
040        }
041    
042        @Override
043        public Collection<FqName> getAllDeclaredPackages() {
044            return Collections.emptyList();
045        }
046    
047        @Override
048        public List<JetDeclaration> getAllDeclarations() {
049            return Collections.emptyList();
050        }
051    
052        @NotNull
053        @Override
054        public Collection<JetNamedFunction> getFunctionDeclarations(@NotNull Name name) {
055            return Collections.emptyList();
056        }
057    
058        @NotNull
059        @Override
060        public Collection<JetProperty> getPropertyDeclarations(@NotNull Name name) {
061            return Collections.emptyList();
062        }
063    
064        @NotNull
065        @Override
066        public Collection<JetClassOrObject> getClassOrObjectDeclarations(@NotNull Name name) {
067            return Collections.emptyList();
068        }
069    }