| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.collections4; |
| |
| /** |
| * Marker interface for collections, maps and iterators that are unmodifiable. |
| * <p> |
| * This interface enables testing such as: |
| * </p> |
| * <pre> |
| * if (coll instanceof Unmodifiable) { |
| * coll = new ArrayList(coll); |
| * } |
| * // now we know coll is modifiable |
| * </pre> |
| * Of course all this only works if you use the Unmodifiable classes defined |
| * in this library. If you use the JDK unmodifiable class via {@code java.util Collections} |
| * then the interface won't be there. |
| * |
| * @since 3.0 |
| */ |
| public interface Unmodifiable { |
| // marker interface - no methods to implement |
| } |
