Main.java

/*
	
	Copyright 2012 VU Medical Center Amsterdam
	
	Licensed under the Apache License, Version 2.0 (the "License");
	you may not use this file except in compliance with the License.
	You may obtain a copy of the License at
	
	    http://www.apache.org/licenses/LICENSE-2.0
	
	Unless required by applicable law or agreed to in writing, software
	distributed under the License is distributed on an "AS IS" BASIS,
	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	See the License for the specific language governing permissions and
	limitations under the License.
	
*/

package nl.vumc.trait.oc.mirth;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathFactory;

import nl.vumc.trait.oc.odm.NSContext;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;

/**
 * Skeleton for any program contained within this package. It provides and initializes
 * basic support data structures for xml handling and command line parsing. 
 * @author Arjan van der Velde (a.vandervelde (at) xs4all.nl)
 */
public abstract class Main {
	/**
	 * Document Builder Factory, set to be namespace aware in default
	 * constructor
	 */
	protected DocumentBuilderFactory documentBuilderFactory;

	/** Document Builder */
	protected DocumentBuilder documentBuilder;

	/** Turn on/off debugging */
	protected boolean debug;

	/** Transformer Factory */
	protected TransformerFactory transformerFactory;
	/** xpath factory */
	protected XPathFactory xPathFactory;
	/** xpath */
	protected XPath xPath;
	/** Logger used for logging (Log4J for logging in Mirth) */
	protected Logger logger;

	/**
	 * Initialize a Main() object 
	 * @throws ParserConfigurationException
	 */
	public Main() throws ParserConfigurationException {
		documentBuilderFactory = DocumentBuilderFactory.newInstance();
		documentBuilderFactory.setValidating(false);
		documentBuilderFactory.setNamespaceAware(true); // <- important!
		documentBuilder = documentBuilderFactory.newDocumentBuilder();
		transformerFactory = TransformerFactory.newInstance();
		xPathFactory = XPathFactory.newInstance();
		xPath = xPathFactory.newXPath();
		xPath.setNamespaceContext(new NSContext()); // <- important too!
		debug = false;
		logger = Logger.getLogger("nl.vumc.trait.oc.mirth");
		logger.setLevel(Level.WARN);
	}

	/**
	 * Check whether we are in debugging mode or not
	 * @return true if we are in debugging mode
	 */
	public boolean isDebug() {
		return debug;
	}

	/**
	 * Set debugging mode. True for debugging, false to turn off debugging.
	 * @param debug debugging mode to set.
	 */
	public void setDebug(boolean debug) {
		this.debug = debug;
		if (debug) {
			logger.setLevel(Level.DEBUG);
		}
	}

	/**
	 * Turn debugging mode on
	 */
	public void setDebug() {
		setDebug(true);
	}


}