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ca.spaz.cron.config.AbstractRegexKeyValidator	0%	0%

1		/*
2		*******************************************************************************
3		* Copyright (c) 2005 Chris Rose and AIMedia
4		* All rights reserved. AbstractRegexKeyValidator and the accompanying materials
5		* are made available under the terms of the Common Public License v1.0
6		* which accompanies this distribution, and is available at
7		* http://www.eclipse.org/legal/cpl-v10.html
8		*
9		* Contributors:
10		* Chris Rose
11		*******************************************************************************/
12		package ca.spaz.cron.config;
13
14		import java.util.regex.*;
15
16	0	public abstract class AbstractRegexKeyValidator implements PropertyValidator {
17
18		protected Matcher getMatcher(String string) {
19	0	if (null == string) {
20	0	throw new IllegalArgumentException("Null strings are not allowed");
21		}
22	0	return Pattern.compile(getExpression()).matcher(string);
23		}
24
25		/* (non-Javadoc)
26		* @see ca.spaz.cron.config.PropertyValidator#isValid(java.lang.String, java.lang.String)
27		*/
28		public boolean isValid(String key, String value) {
29	0	boolean valid = false;
30	0	if (getMatcher(key).find()) {
31	0	valid = doIsValid(key, value);
32		}
33	0	return valid;
34		}
35
36		/**
37		* This method will be called only in the case where the pattern matches. This
38		* can be assumed to be a precondition of the method call.
39		*
40		* @param key The matching key.
41		* @param value The value being checked.
42		* @return <code>true</code> if <code>value</code> is a valid value for
43		* <code>key</code>, <code>false</code> otherwise.
44		*/
45		protected abstract boolean doIsValid(String key, String value);
46
47		/**
48		* Get the regular expression to match the key on.
49		* @return a string representation of a regular expression.
50		*/
51		protected abstract String getExpression();
52
53		}

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