/*
* xtc - The eXTensible Compiler
* Copyright (C) 2004-2007 Robert Grimm
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
package xtc.parser;
/**
* Element to set the semantic value to a string.
*
* @author Robert Grimm
* @version $Revision: 1.5 $
*/
public class StringValue extends ValueElement {
/** The canonical string value element with unknown text. */
public static final StringValue VALUE = new StringValue();
/** The statically known text, which is optional. */
public final String text;
/** Create a new string value. */
public StringValue() {
text = null;
}
/**
* Create a new string value.
*
* @param text The static text.
*/
public StringValue(String text) {
this.text = text;
}
public Tag tag() {
return Tag.STRING_VALUE;
}
public int hashCode() {
return null == text ? 7 : text.hashCode();
}
public boolean equals(Object o) {
if (this == o) return true;
if (! (o instanceof StringValue)) return false;
StringValue other = (StringValue)o;
return null == text ? null == other.text : text.equals(other.text);
}
}