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/* PredefinedTeXFormulaParser.java
* =========================================================================
* This file is part of the JMathTeX Library - http://jmathtex.sourceforge.net
*
* Copyright (C) 2004-2007 Universiteit Gent
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* 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.
*
* A copy of the GNU General Public License can be found in the file
* LICENSE.txt provided with the source distribution of this program (see
* the META-INF directory in the source jar). This license can also be
* found on the GNU website at http://www.gnu.org/licenses/gpl.html.
*
* If you did not receive a copy of the GNU General Public License along
* with this program, contact the lead developer, or write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
*/
package be.ugent.caagt.jmathtex;
import java.util.Map;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
/**
* Parses and creates predefined TeXFormula objects form an XML-file.
*/
class PredefinedTeXFormulaParser {
private static final String RESOURCE_DIR = "";
public static final String RESOURCE_NAME = "PredefinedTeXFormulas.xml";
private Element root;
public PredefinedTeXFormulaParser() throws ResourceParseException {
try {
root = new SAXBuilder().build(
getClass().getResourceAsStream(RESOURCE_DIR + RESOURCE_NAME))
.getRootElement();
} catch (Exception e) { // JDOMException or IOException
throw new XMLResourceParseException(RESOURCE_NAME, e);
}
}
public void parse(Map<String,TeXFormula> predefinedTeXFormulas) {
// get required string attribute
String enabledAll = getAttrValueAndCheckIfNotNull("enabled", root);
if ("true".equals(enabledAll)) { // parse formula's
// iterate all "Font"-elements
for (Object obj : root.getChildren("TeXFormula")) {
Element formula = (Element) obj;
// get required string attribute
String enabled = getAttrValueAndCheckIfNotNull("enabled", formula);
if ("true".equals (enabled)) { // parse this formula
// get required string attribute
String name = getAttrValueAndCheckIfNotNull("name", formula);
// parse and build the formula and add it to the table
predefinedTeXFormulas.put(name, new TeXFormulaParser(name, formula).parse());
}
}
}
}
private static String getAttrValueAndCheckIfNotNull(String attrName,
Element element) throws ResourceParseException {
String attrValue = element.getAttributeValue(attrName);
if (attrValue == null)
throw new XMLResourceParseException(RESOURCE_NAME, element.getName(),
attrName, null);
return attrValue;
}
}
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