/*******************************************************************************
* Copyright (c) 2000, 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.actions;
/**
* Implements an algorithm for very simple pattern matching in a string.
* There is only one feature: "*" may be used at the start or the end of the
* pattern to represent "one or more characters".
* @since 1.0
*/
public final class SimpleWildcardTester {
/**
* Returns whether a string matches a particular pattern.
*
* @param pattern the input pattern
* @param str the string to test
* @return <code>true</code> if a match occurs; <code>false</code>otherwise.
*/
public static boolean testWildcard(String pattern, String str) {
if (pattern.equals("*")) {//$NON-NLS-1$
return true;
} else if (pattern.startsWith("*")) {//$NON-NLS-1$
if (pattern.endsWith("*")) {//$NON-NLS-1$
if (pattern.length() == 2) {
return true;
}
return str.indexOf(pattern.substring(1, pattern.length() - 1)) >= 0;
}
return str.endsWith(pattern.substring(1));
} else if (pattern.endsWith("*")) {//$NON-NLS-1$
return str.startsWith(pattern.substring(0, pattern.length() - 1));
} else {
return str.equals(pattern);
}
}
/**
* Returns whether a string matches a particular pattern. Both string and
* pattern are converted to lower case before pattern matching occurs.
*
* @param pattern the input pattern
* @param str the string to test
* @return <code>true</code> if a match occurs; <code>false</code>otherwise.
*/
public static boolean testWildcardIgnoreCase(String pattern, String str) {
//If str is null there was no extension to test
if (str == null) {
return false;
}
pattern = pattern.toLowerCase();
str = str.toLowerCase();
return testWildcard(pattern, str);
}
}