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.CallableMemberDescriptor;
021    import org.jetbrains.kotlin.descriptors.DeclarationDescriptor;
022    import org.jetbrains.kotlin.resolve.DescriptorUtils;
023    
024    public interface RedeclarationHandler {
025        RedeclarationHandler DO_NOTHING = new RedeclarationHandler() {
026            @Override
027            public void handleRedeclaration(@NotNull DeclarationDescriptor first, @NotNull DeclarationDescriptor second) {
028            }
029    
030            @Override
031            public void handleConflictingOverloads(@NotNull CallableMemberDescriptor first, @NotNull CallableMemberDescriptor second) {
032            }
033        };
034        RedeclarationHandler THROW_EXCEPTION = new RedeclarationHandler() {
035            @Override
036            public void handleRedeclaration(@NotNull DeclarationDescriptor first, @NotNull DeclarationDescriptor second) {
037                throw new IllegalStateException(
038                        String.format("Redeclaration: %s (%s) and %s (%s) (no line info available)", DescriptorUtils.getFqName(first), first,
039                                      DescriptorUtils.getFqName(second), second)
040                );
041            }
042    
043            @Override
044            public void handleConflictingOverloads(@NotNull CallableMemberDescriptor first, @NotNull CallableMemberDescriptor second) {
045                throw new IllegalStateException(
046                        String.format("Conflicting overloads: %s (%s) and %s (%s) (no line info available)",
047                                      DescriptorUtils.getFqName(first), first,
048                                      DescriptorUtils.getFqName(second), second)
049                );
050            }
051        };
052    
053        void handleRedeclaration(@NotNull DeclarationDescriptor first, @NotNull DeclarationDescriptor second);
054        void handleConflictingOverloads(@NotNull CallableMemberDescriptor first, @NotNull CallableMemberDescriptor second);
055    }