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.descriptors.serialization;
018    
019    import kotlin.Function1;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.jet.descriptors.serialization.context.DeserializationGlobalContext;
023    import org.jetbrains.jet.descriptors.serialization.descriptors.*;
024    import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
025    import org.jetbrains.jet.lang.descriptors.PackageFragmentProvider;
026    import org.jetbrains.jet.storage.MemoizedFunctionToNullable;
027    import org.jetbrains.jet.storage.StorageManager;
028    
029    public abstract class AbstractDescriptorFinder implements DescriptorFinder {
030        private final MemoizedFunctionToNullable<ClassId, ClassDescriptor> findClass;
031    
032        public AbstractDescriptorFinder(
033                @NotNull StorageManager storageManager,
034                @NotNull AnnotationLoader annotationLoader,
035                @NotNull ConstantLoader constantLoader,
036                @NotNull PackageFragmentProvider packageFragmentProvider
037        ) {
038            final DeserializationGlobalContext deserializationGlobalContext =
039                    new DeserializationGlobalContext(storageManager, this, annotationLoader, constantLoader,
040                                                     packageFragmentProvider);
041            this.findClass = storageManager.createMemoizedFunctionWithNullableValues(new Function1<ClassId, ClassDescriptor>() {
042                @Override
043                public ClassDescriptor invoke(ClassId classId) {
044                    ClassData classData = getClassData(classId);
045                    return classData == null ? null : new DeserializedClassDescriptor(deserializationGlobalContext, classData);
046                }
047            });
048        }
049    
050        @Nullable
051        @Override
052        public ClassDescriptor findClass(@NotNull ClassId classId) {
053            return findClass.invoke(classId);
054        }
055    
056        @Nullable
057        protected abstract ClassData getClassData(@NotNull ClassId classId);
058    }