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.scopes;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.kotlin.descriptors.DeclarationDescriptor;
021    import org.jetbrains.kotlin.resolve.DescriptorUtils;
022    
023    public interface RedeclarationHandler {
024        RedeclarationHandler DO_NOTHING = new RedeclarationHandler() {
025            @Override
026            public void handleRedeclaration(@NotNull DeclarationDescriptor first, @NotNull DeclarationDescriptor second) {
027            }
028        };
029        RedeclarationHandler THROW_EXCEPTION = new RedeclarationHandler() {
030            @Override
031            public void handleRedeclaration(@NotNull DeclarationDescriptor first, @NotNull DeclarationDescriptor second) {
032                throw new IllegalStateException(
033                        String.format("Redeclaration: %s (%s) and %s (%s) (no line info available)", DescriptorUtils.getFqName(first), first,
034                                      DescriptorUtils.getFqName(second), second)
035                );
036            }
037        };
038    
039        void handleRedeclaration(@NotNull DeclarationDescriptor first, @NotNull DeclarationDescriptor second);
040    }