blob: 2ca4a1c2b66f93f4d90e6f2e290e4257c778b57b (
plain) (
blame)
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
99
100
101
102
103
|
/**
* $RCSfile$
* $Revision$
* $Date$
*
* Copyright 2003-2004 Jive Software.
*
* All rights reserved. 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.jivesoftware.smack.filter;
import org.jivesoftware.smack.packet.Packet;
/**
* Implements the logical AND operation over two or more packet filters.
* In other words, packets pass this filter if they pass <b>all</b> of the filters.
*
* @author Matt Tucker
*/
public class AndFilter implements PacketFilter {
/**
* The current number of elements in the filter.
*/
private int size;
/**
* The list of filters.
*/
private PacketFilter [] filters;
/**
* Creates an empty AND filter. Filters should be added using the
* {@link #addFilter(PacketFilter)} method.
*/
public AndFilter() {
size = 0;
filters = new PacketFilter[3];
}
/**
* Creates an AND filter using the two specified filters.
*
* @param filter1 the first packet filter.
* @param filter2 the second packet filter.
*/
public AndFilter(PacketFilter filter1, PacketFilter filter2) {
if (filter1 == null || filter2 == null) {
throw new IllegalArgumentException("Parameters cannot be null.");
}
size = 2;
filters = new PacketFilter[2];
filters[0] = filter1;
filters[1] = filter2;
}
/**
* Adds a filter to the filter list for the AND operation. A packet
* will pass the filter if all of the filters in the list accept it.
*
* @param filter a filter to add to the filter list.
*/
public void addFilter(PacketFilter filter) {
if (filter == null) {
throw new IllegalArgumentException("Parameter cannot be null.");
}
// If there is no more room left in the filters array, expand it.
if (size == filters.length) {
PacketFilter [] newFilters = new PacketFilter[filters.length+2];
for (int i=0; i<filters.length; i++) {
newFilters[i] = filters[i];
}
filters = newFilters;
}
// Add the new filter to the array.
filters[size] = filter;
size++;
}
public boolean accept(Packet packet) {
for (int i=0; i<size; i++) {
if (!filters[i].accept(packet)) {
return false;
}
}
return true;
}
public String toString() {
return filters.toString();
}
}
|
