001    /*
002     * Copyright 2010-2015 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.kotlin.resolve.calls.tasks;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.kotlin.descriptors.CallableDescriptor;
021    import org.jetbrains.kotlin.descriptors.DeclarationDescriptor;
022    import org.jetbrains.kotlin.psi.Call;
023    import org.jetbrains.kotlin.psi.KtReferenceExpression;
024    import org.jetbrains.kotlin.resolve.BindingTrace;
025    import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
026    import org.jetbrains.kotlin.resolve.calls.model.VariableAsFunctionResolvedCall;
027    import org.jetbrains.kotlin.resolve.calls.util.FakeCallableDescriptorForObject;
028    import org.jetbrains.kotlin.types.ErrorUtils;
029    
030    import java.util.Collection;
031    
032    import static org.jetbrains.kotlin.diagnostics.Errors.UNRESOLVED_REFERENCE;
033    import static org.jetbrains.kotlin.diagnostics.Errors.UNRESOLVED_REFERENCE_WRONG_RECEIVER;
034    import static org.jetbrains.kotlin.resolve.BindingContext.*;
035    
036    public class TracingStrategyImpl extends AbstractTracingStrategy {
037        private final KtReferenceExpression reference;
038    
039        private TracingStrategyImpl(@NotNull KtReferenceExpression reference, @NotNull Call call) {
040            super(reference, call);
041            this.reference = reference;
042        }
043    
044        @NotNull
045        public static TracingStrategy create(@NotNull KtReferenceExpression reference, @NotNull Call call) {
046            return new TracingStrategyImpl(reference, call);
047        }
048    
049        @Override
050        public void bindCall(@NotNull BindingTrace trace, @NotNull Call call) {
051            trace.record(CALL, call.getCalleeExpression(), call);
052        }
053    
054        @Override
055        public <D extends CallableDescriptor> void bindReference(@NotNull BindingTrace trace, @NotNull ResolvedCall<D> resolvedCall) {
056            DeclarationDescriptor descriptor = resolvedCall.getCandidateDescriptor();
057            if (resolvedCall instanceof VariableAsFunctionResolvedCall) {
058                descriptor = ((VariableAsFunctionResolvedCall) resolvedCall).getVariableCall().getCandidateDescriptor();
059            }
060            if (descriptor instanceof FakeCallableDescriptorForObject) {
061                FakeCallableDescriptorForObject fakeCallableDescriptorForObject = (FakeCallableDescriptorForObject) descriptor;
062                descriptor = fakeCallableDescriptorForObject.getReferencedDescriptor();
063                if (fakeCallableDescriptorForObject.getClassDescriptor().getCompanionObjectDescriptor() != null) {
064                    trace.record(SHORT_REFERENCE_TO_COMPANION_OBJECT, reference, fakeCallableDescriptorForObject.getClassDescriptor());
065                }
066            }
067            DeclarationDescriptor storedReference = trace.get(REFERENCE_TARGET, reference);
068            if (storedReference == null || !ErrorUtils.isError(descriptor)) {
069                trace.record(REFERENCE_TARGET, reference, descriptor);
070            }
071        }
072    
073        @Override
074        public <D extends CallableDescriptor> void bindResolvedCall(@NotNull BindingTrace trace, @NotNull ResolvedCall<D> resolvedCall) {
075            trace.record(RESOLVED_CALL, call, resolvedCall);
076        }
077    
078        @Override
079        public void unresolvedReference(@NotNull BindingTrace trace) {
080            trace.report(UNRESOLVED_REFERENCE.on(reference, reference));
081        }
082    
083        @Override
084        public <D extends CallableDescriptor> void unresolvedReferenceWrongReceiver(@NotNull BindingTrace trace, @NotNull Collection<? extends ResolvedCall<D>> candidates) {
085            trace.report(UNRESOLVED_REFERENCE_WRONG_RECEIVER.on(reference, candidates));
086        }
087    }