/*
 *  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.collections.set;

import java.util.Comparator;
import java.util.SortedSet;

import org.apache.commons.collections.Transformer;

Decorates another SortedSet to transform objects that are added.

The add methods are affected by this class.
Thus objects must be removed or searched for using their transformed form.
For example, if the transformation converts Strings to Integers, you must
use the Integer form to remove objects.

This class is Serializable from Commons Collections 3.1.
Author:
Stephen Colebourne
Since:
Commons Collections 3.0
Version:
$Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $/**
 * Decorates another <code>SortedSet</code> to transform objects that are added.
 * <p>
 * The add methods are affected by this class.
 * Thus objects must be removed or searched for using their transformed form.
 * For example, if the transformation converts Strings to Integers, you must
 * use the Integer form to remove objects.
 * <p>
 * This class is Serializable from Commons Collections 3.1.
 * 
 * @since Commons Collections 3.0
 * @version $Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $
 * 
 * @author Stephen Colebourne
 */
public class TransformedSortedSet extends TransformedSet implements SortedSet {

    
Serialization version /** Serialization version */
    private static final long serialVersionUID = -1675486811351124386L;

    
Factory method to create a transforming sorted set.

If there are any elements already in the set being decorated, they
are NOT transformed.
Params:
set –  the set to decorate, must not be null
transformer –  the transformer to use for conversion, must not be null
Throws:
IllegalArgumentException – if set or transformer is null/**
     * Factory method to create a transforming sorted set.
     * <p>
     * If there are any elements already in the set being decorated, they
     * are NOT transformed.
     * 
     * @param set  the set to decorate, must not be null
     * @param transformer  the transformer to use for conversion, must not be null
     * @throws IllegalArgumentException if set or transformer is null
     */
    public static SortedSet decorate(SortedSet set, Transformer transformer) {
        return new TransformedSortedSet(set, transformer);
    }
    
    //-----------------------------------------------------------------------
    
Constructor that wraps (not copies).

If there are any elements already in the set being decorated, they
are NOT transformed.
Params:
set –  the set to decorate, must not be null
transformer –  the transformer to use for conversion, must not be null
Throws:
IllegalArgumentException – if set or transformer is null/**
     * Constructor that wraps (not copies).
     * <p>
     * If there are any elements already in the set being decorated, they
     * are NOT transformed.
     * 
     * @param set  the set to decorate, must not be null
     * @param transformer  the transformer to use for conversion, must not be null
     * @throws IllegalArgumentException if set or transformer is null
     */
    protected TransformedSortedSet(SortedSet set, Transformer transformer) {
        super(set, transformer);
    }

    
Gets the decorated set.
Returns:
the decorated set/**
     * Gets the decorated set.
     * 
     * @return the decorated set
     */
    protected SortedSet getSortedSet() {
        return (SortedSet) collection;
    }

    //-----------------------------------------------------------------------
    public Object first() {
        return getSortedSet().first();
    }

    public Object last() {
        return getSortedSet().last();
    }

    public Comparator comparator() {
        return getSortedSet().comparator();
    }

    //-----------------------------------------------------------------------
    public SortedSet subSet(Object fromElement, Object toElement) {
        SortedSet set = getSortedSet().subSet(fromElement, toElement);
        return new TransformedSortedSet(set, transformer);
    }

    public SortedSet headSet(Object toElement) {
        SortedSet set = getSortedSet().headSet(toElement);
        return new TransformedSortedSet(set, transformer);
    }

    public SortedSet tailSet(Object fromElement) {
        SortedSet set = getSortedSet().tailSet(fromElement);
        return new TransformedSortedSet(set, transformer);
    }

}