/
PredicatedBag.java
98 lines (87 loc) · 3.09 KB
/
PredicatedBag.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
/*
* 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.bag;
import java.util.Set;
import org.apache.commons.collections.Bag;
import org.apache.commons.collections.Predicate;
import org.apache.commons.collections.collection.PredicatedCollection;
/**
* Decorates another <code>Bag</code> to validate that additions
* match a specified predicate.
* <p>
* If an object cannot be added to the list, an IllegalArgumentException
* is thrown.
*
* @since Commons Collections 3.0
* @version $Revision: 1.4 $ $Date: 2004/02/18 00:56:25 $
*
* @author Stephen Colebourne
* @author Paul Jack
*/
public class PredicatedBag
extends PredicatedCollection implements Bag {
/**
* Factory method to create a predicated (validating) bag.
* <p>
* If there are any elements already in the bag being decorated, they
* are validated.
*
* @param bag the bag to decorate, must not be null
* @param predicate the predicate to use for validation, must not be null
* @throws IllegalArgumentException if bag or predicate is null
* @throws IllegalArgumentException if the bag contains invalid elements
*/
public static Bag decorate(Bag bag, Predicate predicate) {
return new PredicatedBag(bag, predicate);
}
//-----------------------------------------------------------------------
/**
* Constructor that wraps (not copies).
* <p>
* If there are any elements already in the bag being decorated, they
* are validated.
*
* @param bag the bag to decorate, must not be null
* @param predicate the predicate to use for validation, must not be null
* @throws IllegalArgumentException if bag or predicate is null
* @throws IllegalArgumentException if the bag contains invalid elements
*/
protected PredicatedBag(Bag bag, Predicate predicate) {
super(bag, predicate);
}
/**
* Gets the decorated bag.
*
* @return the decorated bag
*/
protected Bag getBag() {
return (Bag) getCollection();
}
//-----------------------------------------------------------------------
public boolean add(Object object, int count) {
validate(object);
return getBag().add(object, count);
}
public boolean remove(Object object, int count) {
return getBag().remove(object, count);
}
public Set uniqueSet() {
return getBag().uniqueSet();
}
public int getCount(Object object) {
return getBag().getCount(object);
}
}