01: /*
02: * IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
03: *
04: * http://izpack.org/
05: * http://izpack.codehaus.org/
06: *
07: * Copyright 2003 Elmar Grom
08: *
09: * Licensed under the Apache License, Version 2.0 (the "License");
10: * you may not use this file except in compliance with the License.
11: * You may obtain a copy of the License at
12: *
13: * http://www.apache.org/licenses/LICENSE-2.0
14: *
15: * Unless required by applicable law or agreed to in writing, software
16: * distributed under the License is distributed on an "AS IS" BASIS,
17: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18: * See the License for the specific language governing permissions and
19: * limitations under the License.
20: */
21:
22: package com.izforge.izpack.sample;
23:
24: import com.izforge.izpack.panels.ProcessingClient;
25: import com.izforge.izpack.panels.Validator;
26:
27: /*---------------------------------------------------------------------------*/
28: /**
29: * This class represents a simple validator for IP addresses to demonstrate
30: * the implementation of a rule validator that cooperates with the
31: * <code>RuleInputField</code> used in the <code>UserInputPanel</code>
32: *
33: * @version 0.0.1 / 02/19/03
34: * @author Elmar Grom
35: */
36: /*---------------------------------------------------------------------------*/
37: public class IPValidator implements Validator {
38: /*--------------------------------------------------------------------------*/
39: /**
40: * Validates the contend of a <code>RuleInputField</code>. The test is
41: * intended for a rule input field composed of four sub-fields. The
42: * combination of their individual content is assumed to represent an IP
43: * address.
44: *
45: * @param client the client object using the services of this validator.
46: *
47: * @return <code>true</code> if the validation passes, otherwise <code>false</code>.
48: */
49: /*--------------------------------------------------------------------------*/
50: public boolean validate(ProcessingClient client) {
51: // ----------------------------------------------------
52: // verify that there are actually four sub-fields. A
53: // different number would indicate that we are not
54: // connected with the RuleInputField that we expect
55: // ----------------------------------------------------
56: if (client.getNumFields() != 4) {
57: return (false);
58: }
59:
60: // ----------------------------------------------------
61: // test each field to make sure it actually contains
62: // an integer and the value of the integer is beween
63: // 0 and 255.
64: // ----------------------------------------------------
65: boolean isIP = true;
66:
67: for (int i = 0; i < 4; i++) {
68: int value;
69:
70: try {
71: value = Integer.parseInt(client.getFieldContents(i));
72: if ((value < 0) || (value > 255)) {
73: isIP = false;
74: }
75: } catch (Throwable exception) {
76: isIP = false;
77: }
78: }
79:
80: return (isIP);
81: }
82: }
83: /*---------------------------------------------------------------------------*/
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