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.results;
018    
019    import com.google.common.collect.Lists;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.annotations.Nullable;
022    import org.jetbrains.jet.lang.descriptors.CallableDescriptor;
023    import org.jetbrains.jet.lang.resolve.calls.CallResolverUtil;
024    import org.jetbrains.jet.lang.resolve.calls.context.ContextDependency;
025    import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCall;
026    import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCallWithTrace;
027    import org.jetbrains.jet.lang.types.JetType;
028    
029    import java.util.Collection;
030    
031    public class OverloadResolutionResultsUtil {
032        @NotNull
033        public static <D extends CallableDescriptor> OverloadResolutionResults<D> ambiguity(OverloadResolutionResults<D> results1, OverloadResolutionResults<D> results2) {
034            Collection<ResolvedCallWithTrace<D>> resultingCalls = Lists.newArrayList();
035            resultingCalls.addAll((Collection<ResolvedCallWithTrace<D>>) results1.getResultingCalls());
036            resultingCalls.addAll((Collection<ResolvedCallWithTrace<D>>) results2.getResultingCalls());
037            return OverloadResolutionResultsImpl.ambiguity(resultingCalls);
038        }
039    
040        @Nullable
041        public static <D extends CallableDescriptor> JetType getResultingType(
042                @NotNull OverloadResolutionResults<D> results,
043                @NotNull ContextDependency contextDependency
044        ) {
045            ResolvedCall<D> resultingCall = getResultingCall((OverloadResolutionResultsImpl<D>) results, contextDependency);
046            return resultingCall != null ? resultingCall.getResultingDescriptor().getReturnType() : null;
047        }
048    
049        @Nullable
050        public static <D extends CallableDescriptor> ResolvedCallWithTrace<D> getResultingCall(
051                @NotNull OverloadResolutionResultsImpl<D> results,
052                @NotNull ContextDependency contextDependency
053        ) {
054            if (results.isSingleResult() && contextDependency == ContextDependency.INDEPENDENT) {
055                if (!results.getResultingCall().getCallToCompleteTypeArgumentInference().hasInferredReturnType()) {
056                    return null;
057                }
058            }
059            return results.isSingleResult() ? results.getResultingCall() : null;
060        }
061    }