org.mycore.common.content.MCRSourceContent Maven / Gradle / Ivy
/*
* This file is part of *** M y C o R e ***
* See http://www.mycore.de/ for details.
*
* MyCoRe 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 3 of the License, or
* (at your option) any later version.
*
* MyCoRe 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.
*
* You should have received a copy of the GNU General Public License
* along with MyCoRe. If not, see .
*/
package org.mycore.common.content;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.transform.Source;
import javax.xml.transform.TransformerException;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamSource;
import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.transform.JDOMSource;
import org.mycore.common.MCRException;
import org.mycore.common.xml.MCRURIResolver;
import org.w3c.dom.Node;
/**
* @author Thomas Scheffler (yagee)
*/
public class MCRSourceContent extends MCRWrappedContent {
private static final MCRURIResolver URI_RESOLVER = MCRURIResolver.instance();
private Source source;
public MCRSourceContent(Source source) {
if (source == null) {
throw new NullPointerException("Source cannot be null");
}
this.source = source;
MCRContent baseContent = null;
if (source instanceof JDOMSource) {
JDOMSource src = (JDOMSource) source;
Document xml = src.getDocument();
if (xml != null) {
baseContent = new MCRJDOMContent(xml);
} else {
for (Object node : src.getNodes()) {
if (node instanceof Element) {
Element element = (Element) node;
Document doc = element.getDocument();
if (doc == null) {
baseContent = new MCRJDOMContent(element);
} else {
if (doc.getRootElement() == element) {
baseContent = new MCRJDOMContent(doc);
} else {
baseContent = new MCRJDOMContent(element.clone());
}
}
break;
} else if (node instanceof Document) {
baseContent = new MCRJDOMContent((Document) node);
break;
}
}
}
} else if (source instanceof SAXSource) {
SAXSource src = (SAXSource) source;
baseContent = new MCRSAXContent(src.getXMLReader(), src.getInputSource());
} else if (source instanceof DOMSource) {
Node node = ((DOMSource) source).getNode();
baseContent = new MCRDOMContent(node.getOwnerDocument());
} else if (source instanceof StreamSource) {
InputStream inputStream = ((StreamSource) source).getInputStream();
if (inputStream != null) {
baseContent = new MCRStreamContent(inputStream);
} else {
try {
URL url = new URL(source.getSystemId());
baseContent = new MCRURLContent(url);
} catch (MalformedURLException e) {
throw new MCRException("Could not create instance of MCRURLContent for SYSTEMID: "
+ source.getSystemId(), e);
}
}
}
if (baseContent == null) {
throw new MCRException("Could not get MCRContent from " + source.getClass().getCanonicalName()
+ ", systemId:" + source.getSystemId());
}
baseContent.setSystemId(getSystemId());
this.setBaseContent(baseContent);
}
/**
* Build instance of MCRSourceContent by resolving via {@link MCRURIResolver}
*
* @throws TransformerException
* thrown by {@link MCRURIResolver#resolve(String, String)}
*/
public static MCRSourceContent getInstance(String uri) throws TransformerException {
Source source = URI_RESOLVER.resolve(uri, null);
if (source == null) {
return null;
}
return new MCRSourceContent(source);
}
@Override
public String getSystemId() {
return source.getSystemId();
}
@Override
public Source getSource() throws IOException {
return source;
}
}