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.kotlinSignature;
018    
019    import com.google.common.collect.ImmutableBiMap;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
022    import org.jetbrains.jet.lang.resolve.java.mapping.JavaToKotlinClassMapBuilder;
023    
024    public class CollectionClassMapping extends JavaToKotlinClassMapBuilder {
025        private static CollectionClassMapping instance = null;
026    
027        @NotNull
028        public static CollectionClassMapping getInstance() {
029            if (instance == null) {
030                instance = new CollectionClassMapping();
031            }
032            return instance;
033        }
034    
035        private ImmutableBiMap.Builder<ClassDescriptor, ClassDescriptor> mapBuilder = ImmutableBiMap.builder();
036        private final ImmutableBiMap<ClassDescriptor, ClassDescriptor> mutableToReadOnlyMap;
037    
038        private CollectionClassMapping() {
039            init();
040            mutableToReadOnlyMap = mapBuilder.build();
041            mapBuilder = null;
042        }
043    
044        @Override
045        protected void register(@NotNull Class<?> javaClass, @NotNull ClassDescriptor kotlinDescriptor, @NotNull Direction direction) {
046            // do nothing
047        }
048    
049        @Override
050        protected void register(
051                @NotNull Class<?> javaClass,
052                @NotNull ClassDescriptor kotlinDescriptor,
053                @NotNull ClassDescriptor kotlinMutableDescriptor,
054                @NotNull Direction direction
055        ) {
056            mapBuilder.put(kotlinMutableDescriptor, kotlinDescriptor);
057        }
058    
059        public boolean isMutableCollection(@NotNull ClassDescriptor mutable) {
060            return mutableToReadOnlyMap.containsKey(mutable);
061        }
062    
063        public boolean isReadOnlyCollection(@NotNull ClassDescriptor immutable) {
064            return mutableToReadOnlyMap.containsValue(immutable);
065        }
066    
067        @NotNull
068        public ClassDescriptor convertMutableToReadOnly(@NotNull ClassDescriptor mutable) {
069            ClassDescriptor readOnly = mutableToReadOnlyMap.get(mutable);
070            if (readOnly == null) {
071                throw new IllegalArgumentException("Given class " + mutable + " is not a mutable collection");
072            }
073            return readOnly;
074        }
075    
076        @NotNull
077        public ClassDescriptor convertReadOnlyToMutable(@NotNull ClassDescriptor readOnly) {
078            ClassDescriptor mutable = mutableToReadOnlyMap.inverse().get(readOnly);
079            if (mutable == null) {
080                throw new IllegalArgumentException("Given class " + readOnly + " is not a read-only collection");
081            }
082            return mutable;
083        }
084    }