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.jvm.checkers;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.kotlin.descriptors.CallableDescriptor;
021    import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor;
022    import org.jetbrains.kotlin.descriptors.PropertyDescriptor;
023    import org.jetbrains.kotlin.descriptors.Visibilities;
024    import org.jetbrains.kotlin.resolve.calls.checkers.CallChecker;
025    import org.jetbrains.kotlin.resolve.calls.context.BasicCallResolutionContext;
026    import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
027    import org.jetbrains.kotlin.resolve.scopes.LexicalScope;
028    
029    import static org.jetbrains.kotlin.resolve.BindingContext.NEED_SYNTHETIC_ACCESSOR;
030    
031    public class NeedSyntheticChecker implements CallChecker {
032    
033        @Override
034        public <F extends CallableDescriptor> void check(
035                @NotNull ResolvedCall<F> resolvedCall,
036                @NotNull BasicCallResolutionContext context
037        ) {
038            CallableDescriptor targetDescriptor = resolvedCall.getResultingDescriptor();
039            if (needSyntheticAccessor(context.scope, targetDescriptor)) {
040                context.trace.record(NEED_SYNTHETIC_ACCESSOR, (CallableMemberDescriptor) targetDescriptor.getOriginal(), Boolean.TRUE);
041            }
042        }
043    
044        //Necessary synthetic accessors in outer classes generated via old logic: CodegenContext.getAccessor
045        //Generation of accessors in nested classes (to invoke from outer,
046        //      e.g.: from class to companion object) controlled via NEED_SYNTHETIC_ACCESSOR slice
047        private static boolean needSyntheticAccessor(LexicalScope invokationScope, CallableDescriptor targetDescriptor) {
048            return targetDescriptor instanceof CallableMemberDescriptor &&
049                   isPrivate(targetDescriptor) &&
050                   targetDescriptor.getContainingDeclaration() != invokationScope.getOwnerDescriptor().getContainingDeclaration();
051        }
052    
053        private static boolean isPrivate(@NotNull CallableDescriptor targetDescriptor) {
054            return Visibilities.isPrivate(targetDescriptor.getVisibility()) ||
055                   (targetDescriptor instanceof PropertyDescriptor &&
056                    ((PropertyDescriptor) targetDescriptor).getSetter() != null &&
057                    Visibilities.isPrivate(((PropertyDescriptor) targetDescriptor).getSetter().getVisibility()));
058        }
059    }