/*
 * 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.set;

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

import org.apache.commons.collections4.Predicate;

Decorates another SortedSet to validate that all additions
match a specified predicate.

This set exists to provide validation for the decorated set.
It is normally created to decorate an empty set.
If an object cannot be added to the set, an IllegalArgumentException is thrown.


One usage would be to ensure that no null entries are added to the set.

SortedSet set =
  PredicatedSortedSet.predicatedSortedSet(new TreeSet(),
                                          NotNullPredicate.notNullPredicate());


This class is Serializable from Commons Collections 3.1.

Type parameters:
<E> – the type of the elements in this set
Since:
3.0/**
 * Decorates another <code>SortedSet</code> to validate that all additions
 * match a specified predicate.
 * <p>
 * This set exists to provide validation for the decorated set.
 * It is normally created to decorate an empty set.
 * If an object cannot be added to the set, an IllegalArgumentException is thrown.
 * </p>
 * <p>
 * One usage would be to ensure that no null entries are added to the set.
 * </p>
 * <pre>
 * SortedSet set =
 *   PredicatedSortedSet.predicatedSortedSet(new TreeSet(),
 *                                           NotNullPredicate.notNullPredicate());
 * </pre>
 * <p>
 * This class is Serializable from Commons Collections 3.1.
 * </p>
 *
 * @param <E> the type of the elements in this set
 * @since 3.0
 */
public class PredicatedSortedSet<E> extends PredicatedSet<E> implements SortedSet<E> {

    
Serialization version /** Serialization version */
    private static final long serialVersionUID = -9110948148132275052L;

    
Factory method to create a predicated (validating) sorted set.

If there are any elements already in the set being decorated, they
are validated.
Params:
set –  the set to decorate, must not be null
predicate –  the predicate to use for validation, must not be null
Type parameters:
<E> – the element type
Throws:
NullPointerException – if set or predicate is null
IllegalArgumentException – if the set contains invalid elements
Returns:
a new predicated sorted set.
Since:
4.0/**
     * Factory method to create a predicated (validating) sorted set.
     * <p>
     * If there are any elements already in the set being decorated, they
     * are validated.
     *
     * @param <E> the element type
     * @param set  the set to decorate, must not be null
     * @param predicate  the predicate to use for validation, must not be null
     * @return a new predicated sorted set.
     * @throws NullPointerException if set or predicate is null
     * @throws IllegalArgumentException if the set contains invalid elements
     * @since 4.0
     */
    public static <E> PredicatedSortedSet<E> predicatedSortedSet(final SortedSet<E> set,
                                                                 final Predicate<? super E> predicate) {
        return new PredicatedSortedSet<>(set, predicate);
    }

    //-----------------------------------------------------------------------
    
Constructor that wraps (not copies).

If there are any elements already in the set being decorated, they
are validated.
Params:
set –  the set to decorate, must not be null
predicate –  the predicate to use for validation, must not be null
Throws:
NullPointerException – if set or predicate is null
IllegalArgumentException – if the set contains invalid elements/**
     * Constructor that wraps (not copies).
     * <p>
     * If there are any elements already in the set being decorated, they
     * are validated.
     *
     * @param set  the set to decorate, must not be null
     * @param predicate  the predicate to use for validation, must not be null
     * @throws NullPointerException if set or predicate is null
     * @throws IllegalArgumentException if the set contains invalid elements
     */
    protected PredicatedSortedSet(final SortedSet<E> set, final Predicate<? super E> predicate) {
        super(set, predicate);
    }

    
Gets the sorted set being decorated.
Returns:
the decorated sorted set/**
     * Gets the sorted set being decorated.
     *
     * @return the decorated sorted set
     */
    @Override
    protected SortedSet<E> decorated() {
        return (SortedSet<E>) super.decorated();
    }

    //-----------------------------------------------------------------------
    @Override
    public Comparator<? super E> comparator() {
        return decorated().comparator();
    }

    @Override
    public E first() {
        return decorated().first();
    }

    @Override
    public E last() {
        return decorated().last();
    }

    @Override
    public SortedSet<E> subSet(final E fromElement, final E toElement) {
        final SortedSet<E> sub = decorated().subSet(fromElement, toElement);
        return new PredicatedSortedSet<>(sub, predicate);
    }

    @Override
    public SortedSet<E> headSet(final E toElement) {
        final SortedSet<E> head = decorated().headSet(toElement);
        return new PredicatedSortedSet<>(head, predicate);
    }

    @Override
    public SortedSet<E> tailSet(final E fromElement) {
        final SortedSet<E> tail = decorated().tailSet(fromElement);
        return new PredicatedSortedSet<>(tail, predicate);
    }

}