- /*
- * Copyright 2003-2004 The Apache Software Foundation
- *
- * Licensed 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.collections.set;
-
- import java.util.Comparator;
- import java.util.Set;
- import java.util.SortedSet;
-
- /**
- * Decorates another <code>SortedSet</code> to provide additional behaviour.
- * <p>
- * Methods are forwarded directly to the decorated set.
- *
- * @since Commons Collections 3.0
- * @version $Revision: 1.4 $ $Date: 2004/06/02 21:53:03 $
- *
- * @author Stephen Colebourne
- */
- public abstract class AbstractSortedSetDecorator extends AbstractSetDecorator implements SortedSet {
-
- /**
- * Constructor only used in deserialization, do not use otherwise.
- * @since Commons Collections 3.1
- */
- protected AbstractSortedSetDecorator() {
- super();
- }
-
- /**
- * Constructor that wraps (not copies).
- *
- * @param set the set to decorate, must not be null
- * @throws IllegalArgumentException if set is null
- */
- protected AbstractSortedSetDecorator(Set set) {
- super(set);
- }
-
- /**
- * Gets the sorted set being decorated.
- *
- * @return the decorated set
- */
- protected SortedSet getSortedSet() {
- return (SortedSet) getCollection();
- }
-
- //-----------------------------------------------------------------------
- public SortedSet subSet(Object fromElement, Object toElement) {
- return getSortedSet().subSet(fromElement, toElement);
- }
-
- public SortedSet headSet(Object toElement) {
- return getSortedSet().headSet(toElement);
- }
-
- public SortedSet tailSet(Object fromElement) {
- return getSortedSet().tailSet(fromElement);
- }
-
- public Object first() {
- return getSortedSet().first();
- }
-
- public Object last() {
- return getSortedSet().last();
- }
-
- public Comparator comparator() {
- return getSortedSet().comparator();
- }
-
- }