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.calls.autocasts;
018    
019    import com.google.common.collect.ImmutableMap;
020    import com.google.common.collect.SetMultimap;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.jet.lang.types.JetType;
023    
024    import java.util.Map;
025    import java.util.Set;
026    
027    public interface DataFlowInfo {
028        DataFlowInfo EMPTY = new DelegatingDataFlowInfo(null, ImmutableMap.<DataFlowValue, Nullability>of(),
029                                                        DelegatingDataFlowInfo.newTypeInfo());
030    
031        @NotNull
032        Map<DataFlowValue, Nullability> getCompleteNullabilityInfo();
033    
034        @NotNull
035        SetMultimap<DataFlowValue, JetType> getCompleteTypeInfo();
036    
037        @NotNull
038        Nullability getNullability(@NotNull DataFlowValue key);
039    
040        @NotNull
041        Set<JetType> getPossibleTypes(@NotNull DataFlowValue key);
042    
043        @NotNull
044        DataFlowInfo equate(@NotNull DataFlowValue a, @NotNull DataFlowValue b);
045    
046        @NotNull
047        DataFlowInfo disequate(@NotNull DataFlowValue a, @NotNull DataFlowValue b);
048    
049        @NotNull
050        DataFlowInfo establishSubtyping(@NotNull DataFlowValue value, @NotNull JetType type);
051    
052        @NotNull
053        DataFlowInfo and(@NotNull DataFlowInfo other);
054    
055        @NotNull
056        DataFlowInfo or(@NotNull DataFlowInfo other);
057    }