Source Code Cross Referenced for IPValidator.java in  » Installer » IzPack » com » izforge » izpack » sample » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Installer » IzPack » com.izforge.izpack.sample 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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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