Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/**
* Copyright (c) 2011, 2013, Jonathan Giles, Johan Vos, Hendrik Ebbers
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of DataFX, the website javafxdata.org, nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.datafx.reader.converter;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.bind.JAXB;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.dom.DOMSource;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
/**
*
* A Converter implementation that converts a
* {@link java.io.InputStream} into one or more instances of a java class
* with type T.
* @author johan
* @param The type of the converted objects.
*/
public class XmlConverter extends InputStreamConverter {
private String tag;
private Class clazz;
private NodeList childNodes;
private int totalNodes;
private int currentNode = 0;
private boolean domCreated = false;
private InputStream inputStream;
/**
* Create an XmlConverter that will generate instances of the specified class.
* @param clazz the entities returned by the {@link get()} call will be of class clazz
*/
public XmlConverter (Class clazz) {
this(null, clazz);
}
/**
* Create an XmlConverter that will generate instances of the specified class.
* Using this constructor, it is assumed that the entities are contained within a
* XML structure in a DOM with the name specified by the value of the tag parameter.
* @param clazz the entities returned by the {@link get()} call will be of class clazz
* @param tag the name of the xml element(s) holding the data entity(ies).
*/
public XmlConverter (String tag, Class clazz) {
this.tag = tag;
this.clazz = clazz;
}
@Override public T get() {
// if no tag is specified, we assume it is a single item
if (tag == null) {
if (currentNode == 0) {
T answer = JAXB.unmarshal(inputStream, clazz);
return answer;
} else {
return null;
}
}
// otherwise we expect a DOM to have been created, and we navigate through
// that
if (!domCreated) {
throw new IllegalStateException("XmlConverter has not been initialized");
}
Node node = childNodes.item(currentNode);
DOMSource source = new DOMSource(node);
final T entry = (T) JAXB.unmarshal(source, clazz);
System.out.println("entry retrieved: "+entry);
currentNode++;
return entry;
}
@Override public boolean next() {
if (clazz == null) {
if (currentNode == 0) {
currentNode++;
}
return currentNode == 0;
}
if (!domCreated) {
throw new IllegalStateException("XmlConverter has not been initialized");
}
return currentNode < totalNodes;
}
@Override
public synchronized void initialize(InputStream is) {
this.inputStream = is;
if (clazz == null) {
return;
}
try {
if (tag != null) {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(inputStream);
childNodes = doc.getElementsByTagName(tag);
totalNodes = childNodes.getLength();
System.out.println("childnodes for tag " + tag + "= " + childNodes + " and length = " + totalNodes);
} else {
totalNodes = 1;
}
currentNode = 0;
domCreated = true;
} catch (ParserConfigurationException ex) {
Logger.getLogger(XmlConverter.class.getName()).log(Level.SEVERE, null, ex);
} catch (SAXException ex) {
Logger.getLogger(XmlConverter.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(XmlConverter.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
