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.resolve.lazy.declarations;
018    
019    import kotlin.jvm.functions.Function1;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.kotlin.name.FqName;
023    import org.jetbrains.kotlin.storage.MemoizedFunctionToNullable;
024    import org.jetbrains.kotlin.storage.StorageManager;
025    
026    public abstract class AbstractDeclarationProviderFactory implements DeclarationProviderFactory {
027        private final MemoizedFunctionToNullable<FqName, PackageMemberDeclarationProvider> packageDeclarationProviders;
028    
029        public AbstractDeclarationProviderFactory(@NotNull StorageManager storageManager) {
030            this.packageDeclarationProviders =
031                    storageManager.createMemoizedFunctionWithNullableValues(new Function1<FqName, PackageMemberDeclarationProvider>() {
032                        @Override
033                        public PackageMemberDeclarationProvider invoke(FqName fqName) {
034                            return createPackageMemberDeclarationProvider(fqName);
035                        }
036                    });
037        }
038    
039        @Nullable
040        protected abstract PackageMemberDeclarationProvider createPackageMemberDeclarationProvider(@NotNull FqName name);
041    
042        @Override
043        public PackageMemberDeclarationProvider getPackageMemberDeclarationProvider(@NotNull FqName packageFqName) {
044            return packageDeclarationProviders.invoke(packageFqName);
045        }
046    }