/*******************************************************************************
* Copyright (c) 2006, 2012 Oracle 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:
* Oracle 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.IToken;
import org.eclipse.jface.text.rules.IWordDetector;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.text.rules.WordRule;
/**
* Rule for recognizing axis.
*
* @author Michal Chmielewski (michal.chmielewski@oracle.com)
* @date Dec 20, 2006
*
*/
public class AxisRule extends WordRule {
/**
* @param detector
*/
public AxisRule(IWordDetector detector) {
super(detector);
}
/**
* @param words
* @param token
*/
public void addWords(String[] words, IToken token) {
for (int i = 0; i < words.length; i++) {
addWord(words[i], token);
}
}
/**
* Axis names are (non-Javadoc)
*
* @see org.eclipse.jface.text.rules.WordRule#evaluate(org.eclipse.jface.text.rules.ICharacterScanner)
*/
@Override
public IToken evaluate(ICharacterScanner scanner) {
IToken token = super.evaluate(scanner);
if (token == Token.UNDEFINED) {
return token;
}
// otherwise we have matched the axis name, however, for it to be valid
// it must be followed by ::
// so ...
int ch1 = scanner.read();
int ch2 = scanner.read();
if (ch1 == ch2 && ch1 == ':') {
scanner.unread();
scanner.unread();
return token;
}
// not it
unreadBuffer(scanner);
return Token.UNDEFINED;
}
}