/*******************************************************************************
* Copyright (c) 2004, 2005 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.jst.jsp.ui.internal.style.jspel;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.text.rules.IRule;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.text.rules.WhitespaceRule;
import org.eclipse.jface.text.rules.WordRule;
/**
* A Java code scanner.
*/
public class JSPELCodeScanner extends org.eclipse.jface.text.rules.RuleBasedScanner {
private IToken fKeywordToken;
private IToken fTypeToken;
private IToken fDefaultToken;
private static String[] fgKeywords = {
"and", //$NON-NLS-1$
"did", //$NON-NLS-1$
"div", //$NON-NLS-1$
"empty", //$NON-NLS-1$
"eq", //$NON-NLS-1$
"ge", //$NON-NLS-1$
"gt", //$NON-NLS-1$
"or", //$NON-NLS-1$
"le", //$NON-NLS-1$
"lt", //$NON-NLS-1$
"mod", //$NON-NLS-1$
"ne", //$NON-NLS-1$
"not" //$NON-NLS-1$
};
private static String[] fgConstants = {"false", "true"};//$NON-NLS-2$//$NON-NLS-1$
/**
* Creates a Java code scanner
*/
public JSPELCodeScanner() {
super();
}
public void initializeRules() {
List rules = new ArrayList();
// Add generic whitespace rule.
rules.add(new WhitespaceRule(new JSPELWhitespaceDetector()));
// Add word rule for keywords, types, and constants.
WordRule wordRule = new WordRule(new JSPELWordDetector(), fDefaultToken);
for (int i = 0; i < fgKeywords.length; i++)
wordRule.addWord(fgKeywords[i], fKeywordToken);
for (int i = 0; i < fgConstants.length; i++)
wordRule.addWord(fgConstants[i], fTypeToken);
rules.add(wordRule);
IRule[] result = new IRule[rules.size()];
rules.toArray(result);
setRules(result);
}
public void setTokenData(String tokenKey, Object data) {
if (tokenKey == IStyleConstantsJSPEL.EL_KEYWORD) {
fKeywordToken = new Token(data);
fTypeToken = new Token(data);
} else if (tokenKey == IStyleConstantsJSPEL.EL_DEFAULT) {
fDefaultToken = new Token(data);
}
}
}