001    /*
002     * Copyright 2010-2015 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.kotlin.resolve;
018    
019    import com.google.common.collect.Maps;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.kotlin.diagnostics.Diagnostic;
023    import org.jetbrains.kotlin.psi.JetExpression;
024    import org.jetbrains.kotlin.types.JetType;
025    import org.jetbrains.kotlin.util.slicedMap.ReadOnlySlice;
026    import org.jetbrains.kotlin.util.slicedMap.WritableSlice;
027    
028    import java.util.Collection;
029    import java.util.Map;
030    
031    public class ObservableBindingTrace implements BindingTrace {
032        public interface RecordHandler<K, V> {
033    
034            void handleRecord(WritableSlice<K, V> slice, K key, V value);
035        }
036    
037        private final BindingTrace originalTrace;
038    
039        private Map<WritableSlice, RecordHandler> handlers = Maps.newHashMap();
040    
041        public ObservableBindingTrace(BindingTrace originalTrace) {
042            this.originalTrace = originalTrace;
043        }
044        @Override
045        public void report(@NotNull Diagnostic diagnostic) {
046            originalTrace.report(diagnostic);
047        }
048    
049        @NotNull
050        @Override
051        public BindingContext getBindingContext() {
052            return originalTrace.getBindingContext();
053        }
054    
055        @Override
056        public <K, V> void record(WritableSlice<K, V> slice, K key, V value) {
057            originalTrace.record(slice, key, value);
058            RecordHandler recordHandler = handlers.get(slice);
059            if (recordHandler != null) {
060                recordHandler.handleRecord(slice, key, value);
061            }
062        }
063    
064        @Override
065        public <K> void record(WritableSlice<K, Boolean> slice, K key) {
066            record(slice, key, true);
067        }
068    
069        @Override
070        public <K, V> V get(ReadOnlySlice<K, V> slice, K key) {
071            return originalTrace.get(slice, key);
072        }
073    
074        @Override
075        @NotNull
076        public <K, V> Collection<K> getKeys(WritableSlice<K, V> slice) {
077            return originalTrace.getKeys(slice);
078        }
079    
080        @Nullable
081        @Override
082        public JetType getType(@NotNull JetExpression expression) {
083            return originalTrace.getType(expression);
084        }
085    
086        @Override
087        public void recordType(@NotNull JetExpression expression, @Nullable JetType type) {
088            originalTrace.recordType(expression, type);
089        }
090    
091        public <K, V> ObservableBindingTrace addHandler(@NotNull WritableSlice<K, V> slice, @NotNull RecordHandler<K, V> handler) {
092            handlers.put(slice, handler);
093            return this;
094        }
095        
096    }