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.java;
018    
019    import com.google.common.collect.ImmutableBiMap;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
022    
023    public class CollectionClassMapping extends JavaToKotlinClassMapBuilder {
024        private static CollectionClassMapping instance = null;
025    
026        @NotNull
027        public static CollectionClassMapping getInstance() {
028            if (instance == null) {
029                instance = new CollectionClassMapping();
030            }
031            return instance;
032        }
033    
034        private ImmutableBiMap.Builder<ClassDescriptor, ClassDescriptor> mapBuilder = ImmutableBiMap.builder();
035        private final ImmutableBiMap<ClassDescriptor, ClassDescriptor> mutableToReadOnlyMap;
036    
037        private CollectionClassMapping() {
038            init();
039            mutableToReadOnlyMap = mapBuilder.build();
040            mapBuilder = null;
041        }
042    
043        @Override
044        protected void register(@NotNull Class<?> javaClass, @NotNull ClassDescriptor kotlinDescriptor, @NotNull Direction direction) {
045            // do nothing
046        }
047    
048        @Override
049        protected void register(
050                @NotNull Class<?> javaClass,
051                @NotNull ClassDescriptor kotlinDescriptor,
052                @NotNull ClassDescriptor kotlinMutableDescriptor,
053                @NotNull Direction direction
054        ) {
055            mapBuilder.put(kotlinMutableDescriptor, kotlinDescriptor);
056        }
057    
058        public boolean isMutableCollection(@NotNull ClassDescriptor mutable) {
059            return mutableToReadOnlyMap.containsKey(mutable);
060        }
061    
062        public boolean isReadOnlyCollection(@NotNull ClassDescriptor immutable) {
063            return mutableToReadOnlyMap.containsValue(immutable);
064        }
065    
066        @NotNull
067        public ClassDescriptor convertMutableToReadOnly(@NotNull ClassDescriptor mutable) {
068            ClassDescriptor readOnly = mutableToReadOnlyMap.get(mutable);
069            if (readOnly == null) {
070                throw new IllegalArgumentException("Given class " + mutable + " is not a mutable collection");
071            }
072            return readOnly;
073        }
074    
075        @NotNull
076        public ClassDescriptor convertReadOnlyToMutable(@NotNull ClassDescriptor readOnly) {
077            ClassDescriptor mutable = mutableToReadOnlyMap.inverse().get(readOnly);
078            if (mutable == null) {
079                throw new IllegalArgumentException("Given class " + readOnly + " is not a read-only collection");
080            }
081            return mutable;
082        }
083    }