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.tasks;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.jet.lang.descriptors.CallableDescriptor;
021    import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor;
022    import org.jetbrains.jet.lang.psi.Call;
023    import org.jetbrains.jet.lang.psi.JetReferenceExpression;
024    import org.jetbrains.jet.lang.resolve.BindingTrace;
025    import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCall;
026    import org.jetbrains.jet.lang.resolve.calls.model.VariableAsFunctionResolvedCall;
027    import org.jetbrains.jet.lang.types.ErrorUtils;
028    
029    import java.util.Collection;
030    
031    import static org.jetbrains.jet.lang.diagnostics.Errors.UNRESOLVED_REFERENCE;
032    import static org.jetbrains.jet.lang.diagnostics.Errors.UNRESOLVED_REFERENCE_WRONG_RECEIVER;
033    import static org.jetbrains.jet.lang.resolve.BindingContext.CALL;
034    import static org.jetbrains.jet.lang.resolve.BindingContext.REFERENCE_TARGET;
035    import static org.jetbrains.jet.lang.resolve.BindingContext.RESOLVED_CALL;
036    
037    public class TracingStrategyImpl extends AbstractTracingStrategy {
038        private final JetReferenceExpression reference;
039    
040        private TracingStrategyImpl(@NotNull JetReferenceExpression reference, @NotNull Call call) {
041            super(reference, call);
042            this.reference = reference;
043        }
044    
045        @NotNull
046        public static TracingStrategy create(@NotNull JetReferenceExpression reference, @NotNull Call call) {
047            return new TracingStrategyImpl(reference, call);
048        }
049    
050        @Override
051        public void bindCall(@NotNull BindingTrace trace, @NotNull Call call) {
052            trace.record(CALL, call.getCalleeExpression(), call);
053        }
054    
055        @Override
056        public <D extends CallableDescriptor> void bindReference(@NotNull BindingTrace trace, @NotNull ResolvedCall<D> resolvedCall) {
057            CallableDescriptor descriptor = resolvedCall.getCandidateDescriptor();
058            if (resolvedCall instanceof VariableAsFunctionResolvedCall) {
059                descriptor = ((VariableAsFunctionResolvedCall) resolvedCall).getVariableCall().getCandidateDescriptor();
060            }
061            DeclarationDescriptor storedReference = trace.get(REFERENCE_TARGET, reference);
062            if (storedReference == null || !ErrorUtils.isError(descriptor)) {
063                trace.record(REFERENCE_TARGET, reference, descriptor);
064            }
065        }
066    
067        @Override
068        public <D extends CallableDescriptor> void bindResolvedCall(@NotNull BindingTrace trace, @NotNull ResolvedCall<D> resolvedCall) {
069            trace.record(RESOLVED_CALL, call.getCalleeExpression(), resolvedCall);
070        }
071    
072        @Override
073        public void unresolvedReference(@NotNull BindingTrace trace) {
074            trace.report(UNRESOLVED_REFERENCE.on(reference, reference));
075        }
076    
077        @Override
078        public <D extends CallableDescriptor> void unresolvedReferenceWrongReceiver(@NotNull BindingTrace trace, @NotNull Collection<? extends ResolvedCall<D>> candidates) {
079            trace.report(UNRESOLVED_REFERENCE_WRONG_RECEIVER.on(reference, candidates));
080        }
081    }