/*******************************************************************************
* Copyright (c) 2008, 2012 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.bpel.ui.editors.xpath.rules;
import org.eclipse.jface.text.rules.ICharacterScanner;
import org.eclipse.jface.text.rules.IRule;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.Token;
/**
* Single character rule. If the character is matched, the token is returned and
* the style is applied.
*
* @author Michal Chmielewski (michal.chmielewski@oracle.com)
* @date Oct 26, 2006
*
*/
public class SingleCharRule implements IRule {
IToken fToken;
String fChars;
/**
* Return a brand new shiny Single Character Rule.
*
* @param token
* @param chars
*/
public SingleCharRule(IToken token, String chars) {
assert token != null;
fToken = token;
assert chars != null;
fChars = chars;
}
/**
*
* @see org.eclipse.jface.text.rules.IRule#evaluate(org.eclipse.jface.text.rules.ICharacterScanner)
*/
public IToken evaluate(ICharacterScanner scanner) {
int ch = scanner.read();
if (fChars.indexOf(ch) >= 0) {
return fToken;
}
scanner.unread();
return Token.UNDEFINED;
}
}