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 org.jetbrains.annotations.NotNull;
020    import org.jetbrains.jet.lang.resolve.scopes.receivers.ReceiverValue;
021    
022    import java.util.Collections;
023    import java.util.List;
024    
025    public interface AutoCastService {
026        AutoCastService NO_AUTO_CASTS = new AutoCastService() {
027            @NotNull
028            @Override
029            public DataFlowInfo getDataFlowInfo() {
030                return DataFlowInfo.EMPTY;
031            }
032    
033            @Override
034            public boolean isNotNull(@NotNull ReceiverValue receiver) {
035                return !receiver.getType().isNullable();
036            }
037    
038            @NotNull
039            @Override
040            public List<ReceiverValue> getVariantsForReceiver(@NotNull ReceiverValue receiverValue) {
041                return Collections.singletonList(receiverValue);
042            }
043        };
044    
045        @NotNull
046        List<ReceiverValue> getVariantsForReceiver(@NotNull ReceiverValue receiverValue);
047    
048        @NotNull
049        DataFlowInfo getDataFlowInfo();
050    
051        boolean isNotNull(@NotNull ReceiverValue receiver);
052    }