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
017package org.jetbrains.jet.lang.resolve;
018
019import com.google.common.collect.Maps;
020import org.jetbrains.annotations.NotNull;
021import org.jetbrains.jet.lang.diagnostics.Diagnostic;
022import org.jetbrains.jet.util.slicedmap.ReadOnlySlice;
023import org.jetbrains.jet.util.slicedmap.WritableSlice;
024
025import java.util.Collection;
026import java.util.Map;
027
028public class ObservableBindingTrace implements BindingTrace {
029    public interface RecordHandler<K, V> {
030
031        void handleRecord(WritableSlice<K, V> slice, K key, V value);
032    }
033
034    private final BindingTrace originalTrace;
035
036    private Map<WritableSlice, RecordHandler> handlers = Maps.newHashMap();
037
038    public ObservableBindingTrace(BindingTrace originalTrace) {
039        this.originalTrace = originalTrace;
040    }
041    @Override
042    public void report(@NotNull Diagnostic diagnostic) {
043        originalTrace.report(diagnostic);
044    }
045
046    @Override
047    public BindingContext getBindingContext() {
048        return originalTrace.getBindingContext();
049    }
050
051    @Override
052    public <K, V> void record(WritableSlice<K, V> slice, K key, V value) {
053        originalTrace.record(slice, key, value);
054        RecordHandler recordHandler = handlers.get(slice);
055        if (recordHandler != null) {
056            recordHandler.handleRecord(slice, key, value);
057        }
058    }
059
060    @Override
061    public <K> void record(WritableSlice<K, Boolean> slice, K key) {
062        record(slice, key, true);
063    }
064
065    @Override
066    public <K, V> V get(ReadOnlySlice<K, V> slice, K key) {
067        return originalTrace.get(slice, key);
068    }
069
070    @Override
071    @NotNull
072    public <K, V> Collection<K> getKeys(WritableSlice<K, V> slice) {
073        return originalTrace.getKeys(slice);
074    }
075
076    public <K, V> ObservableBindingTrace addHandler(@NotNull WritableSlice<K, V> slice, @NotNull RecordHandler<K, V> handler) {
077        handlers.put(slice, handler);
078        return this;
079    }
080    
081}