com.github.aiderpmsi.hprim.parser.xml.XmlContentHandler Maven / Gradle / Ivy

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package com.github.aiderpmsi.hprim.parser.xml;

import java.io.IOException;
import java.io.PrintStream;
import java.io.Writer;
import java.util.concurrent.CancellationException;

import org.apache.commons.lang.StringEscapeUtils;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;

/**
 * Implémentation de l'interface ContentHandler permettant de sortir sur une sortie
 * de type {@link PrintStream} les éléments du fichier HPRIM sous la forme d'un xml
 * valide
 * @author delabre
 */
public class XmlContentHandler implements ContentHandler {
		
	/**
	 * Writer utilisé dans ce collecteur
	 */
	private Writer out;

	/**
	 * Constructeur
	 */
	public XmlContentHandler(Writer writer) {
		this.out = writer;
		if (Thread.currentThread().isInterrupted())
			throw new CancellationException();
	}
	
	// ======== Méthodes pour ContentHandler =======
	@Override
	public void setDocumentLocator(Locator locator) {
		// Do nothing
	}

	@Override
	public void startDocument() throws SAXException {
		try {
			out.write("");
			out.flush();
		} catch (IOException e) {
			throw new SAXException(e);
		}
		if (Thread.currentThread().isInterrupted())
			throw new CancellationException();
	}

	@Override
	public void endDocument() throws SAXException {
		try {
			out.flush();
		} catch (IOException e) {
			throw new SAXException(e);
		}
		if (Thread.currentThread().isInterrupted())
			throw new CancellationException();
	}

	@Override
	public void startPrefixMapping(String prefix, String uri)
			throws SAXException {
		// Do nothing
	}

	@Override
	public void endPrefixMapping(String prefix) throws SAXException {
		// Do nothing
	}

	@Override
	public void startElement(String uri, String localName, String qName,
			Attributes atts) throws SAXException {
		StringBuilder builder = new StringBuilder();
	    try {
	    	builder.append("<")
	    		.append(StringEscapeUtils.escapeXml(localName));
	        if (atts != null) {
	            int i = 0;
	            while (i < atts.getLength()) {
	            	builder.append(" ")
	            		.append(StringEscapeUtils.escapeXml(atts.getLocalName(i)))
	            		.append("=\"")
	            		.append(StringEscapeUtils.escapeXml(atts.getValue(i)))
	            		.append("\"");
	            	i++;
	            }                
	        }            
	        builder.append(">");
	        out.write(builder.toString());
			out.flush();
	    } catch (IOException e) {
	        throw new SAXException(e);
	    }
		if (Thread.currentThread().isInterrupted())
			throw new CancellationException();
	}

	@Override
	public void endElement(String uri, String localName, String qName) throws SAXException {
		StringBuilder builder = new StringBuilder();
		try {
			builder.append("");
			out.write(builder.toString());
			out.flush();
		} catch (IOException e) {
			throw new SAXException(e);
		}
		if (Thread.currentThread().isInterrupted())
			throw new CancellationException();
	}

	@Override
	public void characters(char[] ch, int start, int length)
			throws SAXException {
		try {
			out.write(StringEscapeUtils.escapeXml(new String(ch, start, length)));
			out.flush();
		} catch (IOException e) {
			throw new SAXException(e);
		}
	}

	@Override
	public void ignorableWhitespace(char[] ch, int start, int length)
			throws SAXException {
		// Do nothing
	}

	@Override
	public void processingInstruction(String target, String data)
			throws SAXException {
		// Do nothing
	}

	@Override
	public void skippedEntity(String name) throws SAXException {
		// Do nothing
	}

}