/*
* Copyright (C) 2014 Jan Pokorsky
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cas.lib.proarc.mix;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;
import java.io.StringWriter;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.xml.bind.DataBindingException;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
/**
*
* @author Jan Pokorsky
*/
public final class MixUtils {
/**
* The MIX namespace {@code http://www.loc.gov/mix/v20}.
*/
public static final String NS = "http://www.loc.gov/mix/v20";
private static JAXBContext defaultJaxbContext;
private static ThreadLocal<Marshaller> defaultMarshaller = new ThreadLocal<Marshaller>();
private static ThreadLocal<Unmarshaller> defaultUnmarshaller = new ThreadLocal<Unmarshaller>();
/**
* Default context. Oracle JAXB RI's context should be thread safe.
* @see <a href='http://jaxb.java.net/faq/index.html#threadSafety'>Are the JAXB runtime API's thread safe?</a>
*/
public static JAXBContext defaultJaxbContext() throws JAXBException {
if (defaultJaxbContext == null) {
defaultJaxbContext = JAXBContext.newInstance(ObjectFactory.class);
}
return defaultJaxbContext;
}
public static Marshaller defaultMarshaller(boolean indent) throws JAXBException {
Marshaller m = defaultMarshaller.get();
if (m == null) {
// later we could use a pool to minimize Marshaller instances
m = defaultJaxbContext().createMarshaller();
defaultMarshaller.set(m);
}
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, indent);
return m;
}
/**
* Default marshaller for current thread.
*/
public static Unmarshaller defaultUnmarshaller() throws JAXBException {
Unmarshaller m = defaultUnmarshaller.get();
if (m == null) {
m = defaultJaxbContext().createUnmarshaller();
defaultUnmarshaller.set(m);
}
return m;
}
/**
* Dumps object to XML string.
*/
public static String toXml(MixType mix, boolean indent) {
StringWriter dump = new StringWriter();
marshal(new StreamResult(dump), mix, indent);
return dump.toString();
}
public static void marshal(Result target, Object mixElement, boolean indent) {
try {
Marshaller m = defaultMarshaller(indent);
m.marshal(mixElement, target);
} catch (JAXBException ex) {
throw new DataBindingException(ex);
}
}
public static <T> T unmarshal(InputStream source, Class<T> type, boolean close) {
try {
return unmarshal(new StreamSource(source), type);
} finally {
if (close) {
try {
source.close();
} catch (IOException ex) {
Logger.getLogger(MixUtils.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}
public static <T> T unmarshal(String source, Class<T> type) {
return unmarshal(new StreamSource(new StringReader(source)), type);
}
public static <T> T unmarshal(URL source, Class<T> type) {
return unmarshal(new StreamSource(source.toExternalForm()), type);
}
public static <T> T unmarshal(Source source, Class<T> type) {
try {
JAXBElement<T> item = defaultUnmarshaller().unmarshal(source, type);
return item.getValue();
} catch (JAXBException ex) {
throw new DataBindingException(ex);
}
}
public static StringType stringType(String value) {
StringType stringType = new StringType();
stringType.setValue(value);
return stringType;
}
}