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;
018    
019    import com.google.common.collect.ImmutableMap;
020    import com.google.common.collect.Lists;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.annotations.TestOnly;
023    import org.jetbrains.jet.lang.diagnostics.Diagnostic;
024    import org.jetbrains.jet.util.slicedmap.*;
025    
026    import java.util.Collection;
027    import java.util.List;
028    
029    public class BindingTraceContext implements BindingTrace {
030        private final List<Diagnostic> diagnostics = Lists.newArrayList();
031    
032        // This flag is used for debugging of "Rewrite at slice..." exceptions
033        // NOTE: sometimes TrackingSlicedMap throws a ClassCastException (after you have fixed the rewrite).
034        // I gave up debugging it, because it still serves its purpose. Any suggestions on how to fix it are welcome. (abreslav)
035        private final static boolean TRACK_REWRITES = false;
036        @SuppressWarnings("ConstantConditions")
037        private final MutableSlicedMap map = TRACK_REWRITES ? new TrackingSlicedMap(SlicedMapImpl.create()) : SlicedMapImpl.create();
038    
039        private final BindingContext bindingContext = new BindingContext() {
040    
041            @Override
042            public Collection<Diagnostic> getDiagnostics() {
043                return diagnostics;
044            }
045    
046            @Override
047            public <K, V> V get(ReadOnlySlice<K, V> slice, K key) {
048                return BindingTraceContext.this.get(slice, key);
049            }
050    
051            @NotNull
052            @Override
053            public <K, V> Collection<K> getKeys(WritableSlice<K, V> slice) {
054                return BindingTraceContext.this.getKeys(slice);
055            }
056    
057            @NotNull
058            @TestOnly
059            @Override
060            public <K, V> ImmutableMap<K, V> getSliceContents(@NotNull ReadOnlySlice<K, V> slice) {
061                return map.getSliceContents(slice);
062            }
063        };
064    
065        @Override
066        public void report(@NotNull Diagnostic diagnostic) {
067            diagnostics.add(diagnostic);
068        }
069    
070        public void clearDiagnostics() {
071            diagnostics.clear();
072        }
073    
074        @Override
075        public BindingContext getBindingContext() {
076            return bindingContext;
077        }
078    
079        @Override
080        public <K, V> void record(WritableSlice<K, V> slice, K key, V value) {
081            map.put(slice, key, value);
082        }
083    
084        @Override
085        public <K> void record(WritableSlice<K, Boolean> slice, K key) {
086            record(slice, key, true);
087        }
088    
089        @Override
090        public <K, V> V get(ReadOnlySlice<K, V> slice, K key) {
091            return map.get(slice, key);
092        }
093    
094        @NotNull
095        @Override
096        public <K, V> Collection<K> getKeys(WritableSlice<K, V> slice) {
097            return map.getKeys(slice);
098        }
099    }