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 jet.Function1;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.jet.descriptors.serialization.descriptors.AnnotationDeserializer;
023    import org.jetbrains.jet.descriptors.serialization.descriptors.DeserializedClassDescriptor;
024    import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
025    import org.jetbrains.jet.storage.MemoizedFunctionToNullable;
026    import org.jetbrains.jet.storage.StorageManager;
027    
028    public abstract class AbstractDescriptorFinder implements DescriptorFinder {
029        private final MemoizedFunctionToNullable<ClassId, ClassDescriptor> findClass;
030        private final AnnotationDeserializer annotationDeserializer;
031    
032        public AbstractDescriptorFinder(
033                @NotNull final StorageManager storageManager,
034                @NotNull AnnotationDeserializer annotationDeserializer
035        ) {
036            this.annotationDeserializer = annotationDeserializer;
037    
038            this.findClass = storageManager.createMemoizedFunctionWithNullableValues(new Function1<ClassId, ClassDescriptor>() {
039                @Override
040                public ClassDescriptor invoke(ClassId classId) {
041                    ClassData classData = getClassData(classId);
042                    if (classData == null) {
043                        return null;
044                    }
045    
046                    AbstractDescriptorFinder _this = AbstractDescriptorFinder.this;
047                    ClassDescriptor classDescriptor =
048                            new DeserializedClassDescriptor(storageManager, _this.annotationDeserializer, _this, classData.getNameResolver(),
049                                                            classData.getClassProto());
050                    classDescriptorCreated(classDescriptor);
051                    return classDescriptor;
052                }
053            });
054        }
055    
056        @Nullable
057        @Override
058        public ClassDescriptor findClass(@NotNull ClassId classId) {
059            return findClass.invoke(classId);
060        }
061    
062        @Nullable
063        protected abstract ClassData getClassData(@NotNull ClassId classId);
064    
065        protected void classDescriptorCreated(@NotNull ClassDescriptor classDescriptor) {
066        }
067    }