/*******************************************************************************
* Copyright (c) 2011 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Blaise Doughan - 2.3 - initial implementation
******************************************************************************/
package org.eclipse.persistence.jaxb.metadata;
import java.io.File;
import java.io.InputStream;
import java.io.Reader;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Map;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stax.StAXSource;
import javax.xml.transform.stream.StreamSource;
import org.eclipse.persistence.jaxb.JAXBContext;
import org.eclipse.persistence.jaxb.compiler.CompilerHelper;
import org.eclipse.persistence.jaxb.xmlmodel.XmlBindings;
import org.w3c.dom.Node;
import org.xml.sax.InputSource;
/**
* A concrete implementation of MetadataSource that can represent the following
* metadata input types;
* <ul><li>java.io.File</li>
* <li>java.io.InputStream</li>
* <li>java.io.Reader</li>
* <li>java.net.URL</li>
* <li>javax.xml.stream.XMLEventReader</li>
* <li>javax.xml.stream.XMLStreamReader</li>
* <li>javax.xml.transform.Source</li>
* <li>org.w3c.dom.Node</li>
* <li>org.xml.sax.InputSource</li></ul>
*/
public class XMLMetadataSource extends MetadataSourceAdapter {
private Source xmlBindingsSource;
private URL xmlBindingsURL;
private String xmlBindingsLocation;
/**
* The XML bindings metadata will be loaded from a File.
*/
public XMLMetadataSource(File xmlBindings) {
if(xmlBindings == null) {
throw new IllegalArgumentException();
}
xmlBindingsSource = new StreamSource(xmlBindings);
}
/**
* The XML bindings metadata will be loaded from an InputStream.
*/
public XMLMetadataSource(InputStream xmlBindings) {
if(xmlBindings == null) {
throw new IllegalArgumentException();
}
xmlBindingsSource = new StreamSource(xmlBindings);
}
/**
* The XML bindings metadata will be loaded from Reader.
*/
public XMLMetadataSource(Reader xmlBindings) {
if(xmlBindings == null) {
throw new IllegalArgumentException();
}
xmlBindingsSource = new StreamSource(xmlBindings);
}
/**
* The XML bindings metadata will be loaded from a URL.
*/
public XMLMetadataSource(URL xmlBindings) {
if(xmlBindings == null) {
throw new IllegalArgumentException();
}
xmlBindingsURL = xmlBindings;
}
/**
* The XML bindings metadata will be loaded from an XMLEventReader.
*/
public XMLMetadataSource(XMLEventReader xmlBindings) {
if(xmlBindings == null) {
throw new IllegalArgumentException();
}
try {
xmlBindingsSource = new StAXSource(xmlBindings);
} catch (XMLStreamException e) {
org.eclipse.persistence.exceptions.JAXBException.couldNotUnmarshalMetadata(e);
}
}
/**
* The XML bindings metadata will be loaded from an XMLStreamReader.
*/
public XMLMetadataSource(XMLStreamReader xmlBindings) {
if(xmlBindings == null) {
throw new IllegalArgumentException();
}
xmlBindingsSource = new StAXSource(xmlBindings);
}
/**
* The XML bindings metadata will be loaded from a Source.
*/
public XMLMetadataSource(Source xmlBindings) {
if(xmlBindings == null) {
throw new IllegalArgumentException();
}
xmlBindingsSource = xmlBindings;
}
/**
* The XML bindings metadata will be loaded from a Node.
*/
public XMLMetadataSource(Node xmlBindings) {
if(xmlBindings == null) {
throw new IllegalArgumentException();
}
xmlBindingsSource = new DOMSource(xmlBindings);
}
/**
* The XML bindings metadata will be loaded from an InputSource.
*/
public XMLMetadataSource(InputSource xmlBindings) {
if(xmlBindings == null) {
throw new IllegalArgumentException();
}
xmlBindingsSource = new SAXSource(xmlBindings);
}
/**
* XML bindings metatdata will be loaded either as a URL or as a classpath reference
*/
public XMLMetadataSource(String xmlBindings) {
if(xmlBindings == null) {
throw new IllegalArgumentException();
}
//If this is a valid URL, store it as URL. Otherwise store as a String and
//try to load from the classpath later.
try {
this.xmlBindingsURL = new URL(xmlBindings);
} catch (MalformedURLException ex) {
xmlBindingsLocation = xmlBindings;
}
}
@Override
public XmlBindings getXmlBindings(Map<String, ?> properties, ClassLoader classLoader) {
try {
JAXBContext jaxbContext = CompilerHelper.getXmlBindingsModelContext();
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
if(null != xmlBindingsSource) {
return (XmlBindings) unmarshaller.unmarshal(xmlBindingsSource);
}
if(null != xmlBindingsURL) {
return (XmlBindings) unmarshaller.unmarshal(xmlBindingsURL);
}
if(null != xmlBindingsLocation) {
URL url = classLoader.getResource(xmlBindingsLocation);
if(url == null) {
// throw exception
throw org.eclipse.persistence.exceptions.JAXBException.unableToLoadMetadataFromLocation(xmlBindingsLocation);
}
return (XmlBindings) unmarshaller.unmarshal(url);
}
} catch(JAXBException e) {
throw org.eclipse.persistence.exceptions.JAXBException.couldNotUnmarshalMetadata(e);
}
return null;
}
}