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.descriptors.AnnotationDeserializer;
023    import org.jetbrains.jet.descriptors.serialization.descriptors.DeserializedClassDescriptor;
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        private final AnnotationDeserializer annotationDeserializer;
032    
033        public AbstractDescriptorFinder(
034                @NotNull final StorageManager storageManager,
035                @NotNull AnnotationDeserializer annotationDeserializer,
036                @NotNull final PackageFragmentProvider packageFragmentProvider
037        ) {
038            this.annotationDeserializer = annotationDeserializer;
039    
040            this.findClass = storageManager.createMemoizedFunctionWithNullableValues(new Function1<ClassId, ClassDescriptor>() {
041                @Override
042                public ClassDescriptor invoke(ClassId classId) {
043                    ClassData classData = getClassData(classId);
044                    if (classData == null) {
045                        return null;
046                    }
047    
048                    AbstractDescriptorFinder _this = AbstractDescriptorFinder.this;
049                    return new DeserializedClassDescriptor(storageManager, _this.annotationDeserializer, _this, packageFragmentProvider,
050                                                    classData.getNameResolver(), classData.getClassProto());
051                }
052            });
053        }
054    
055        @Nullable
056        @Override
057        public ClassDescriptor findClass(@NotNull ClassId classId) {
058            return findClass.invoke(classId);
059        }
060    
061        @Nullable
062        protected abstract ClassData getClassData(@NotNull ClassId classId);
063    }