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/*****************************************************************************
* Copyright (c) 2013 CEA LIST.
*
*
* 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:
* CEA LIST - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.views.search.regex;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
/**
*
* Singleton helper class used to find pattern queries in strings
*
*/
public class PatternHelper {
private static PatternHelper instance = null;
private PatternHelper() {
super();
}
/**
* Singleton
*
* @return the helper
*/
public static final PatternHelper getInstance() {
synchronized (PatternHelper.class) {
if (PatternHelper.instance == null) {
PatternHelper.instance = new PatternHelper();
}
}
return PatternHelper.instance;
}
/**
* Create a pattern
*
* @param query
* the query text
* @param isCaseSensitive
* if it is a case sensitive pattern
* @param isRegularExpression
* if it i a regular expression pattern
* @return
* the pattern corresponding to the query text and the parameters
* @throws PatternSyntaxException
*/
public Pattern createPattern(String query, boolean isCaseSensitive, boolean isRegularExpression) throws PatternSyntaxException {
int options = Pattern.MULTILINE;
if (!isRegularExpression) {
// query = ".*" + Pattern.quote(query); //$NON-NLS-1$
query = Pattern.quote(query);
}
if (!isCaseSensitive) {
options |= Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE;
}
Pattern pattern = Pattern.compile(query, options);
return pattern;
}
// /**
// * Check whether a string matches a certain pattern in a matcher
// *
// * @param m
// * the matcher
// * @param isRegularExpression
// * specify if it is a regular expression pattern
// * @return
// * true if the text matches the pattern, else false
// */
// public boolean evaluate(Matcher m, boolean isRegularExpression) {
//
//
// if(isRegularExpression) {
// return m.matches();
// } else {
// return m.lookingAt();
// }
// }
}
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