/*******************************************************************************
* 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.ElCoreMessages;
import org.jboss.tools.common.el.core.parser.ITokenDescription;
import org.jboss.tools.common.el.core.parser.Tokenizer;
/**
*
* @author V. Kabanovich
*
*/
public class JavaNameTokenDescription implements ITokenDescription {
public static final int JAVA_NAME = 3;
public static JavaNameTokenDescription INSTANCE = new JavaNameTokenDescription();
public static ConstantTokenDescription INSTANCEOF_INSTANCE = InstanceofTokenDescription.INSTANCE;
public String getName() {
return ElCoreMessages.JavaNameTokenDescription_Name;
}
public int getType() {
return JAVA_NAME;
}
public boolean isStart(Tokenizer tokenizer, int offset) {
if(OperationTokenDescription.INSTANCE.isStart(tokenizer, offset)) {
return false;
}
if(InstanceofTokenDescription.INSTANCE.isStart(tokenizer, offset)) {
return false;
}
char ch = tokenizer.lookUpChar(offset);
return Character.isJavaIdentifierStart(ch) && ch != '\0' && ch != '$';
}
public boolean read(Tokenizer tokenizer, int offset) {
int i = offset;
char ch = '\0';
while(Character.isJavaIdentifierPart(ch = tokenizer.readNextChar()) && ch != '\0') {
i++;
}
if(ch != '\0') {
tokenizer.releaseChar();
}
tokenizer.addToken(getType(), offset, i);
return false;
}
}
class InstanceofTokenDescription extends ConstantTokenDescription {
public static final int INSTANCEOF = 16;
public static InstanceofTokenDescription INSTANCE = new InstanceofTokenDescription();
private static final String[] OPS_2 = {
"instanceof" //$NON-NLS-1$
};
public InstanceofTokenDescription() {
super("!", INSTANCEOF); //$NON-NLS-1$
}
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;
}
}