/*******************************************************************************
* Copyright (c) 2007 Red Hat, Inc.
* Distributed under license by Red Hat, Inc. All rights reserved.
* This program is 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:
* Red Hat, Inc. - initial API and implementation
******************************************************************************/
package org.jboss.tools.common.el.internal.core.parser.token;
import org.jboss.tools.common.el.core.parser.Tokenizer;
/**
*
* @author V. Kabanovich
*
*/
public class UnaryTokenDescription extends ConstantTokenDescription {
public static final int UNARY = 15;
public static UnaryTokenDescription INSTANCE = new UnaryTokenDescription();
private static final String[] OPS_2 = {
"not", "empty" //$NON-NLS-1$//$NON-NLS-2$
};
public UnaryTokenDescription() {
super("!", UNARY); //$NON-NLS-1$
addContent("--"); //$NON-NLS-1$
addContent("++"); //$NON-NLS-1$
addContent("+"); //$NON-NLS-1$
addContent("-"); //$NON-NLS-1$
}
public boolean isStart(Tokenizer tokenizer, int offset) {
if(super.isStart(tokenizer, offset)) {
return true;
}
int end = -1;
for (int i = 0; end < 0 && i < OPS_2.length; i++) {
if(tokenizer.startsWith(OPS_2[i])) {
end = offset + OPS_2[i].length();
}
}
if(end < 0) return false;
char ch = tokenizer.lookUpChar(end);
if(Character.isWhitespace(ch) || ch == '\0' || ch == '(' || !Character.isJavaIdentifierPart(ch)
) {
return true;
}
return false;
}
public boolean read(Tokenizer tokenizer, int offset) {
if(super.isStart(tokenizer, offset)) {
return super.read(tokenizer, offset);
}
int end = -1;
for (int i = 0; end < 0 && i < OPS_2.length; i++) {
if(tokenizer.startsWith(OPS_2[i])) {
end = offset + OPS_2[i].length();
}
}
tokenizer.addToken(getType(), offset, end);
return true;
}
}