main.java.com.px100systems.util.XmlParser Maven / Gradle / Ivy
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/*
* This file is part of Px100 Data.
*
* Px100 Data 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 com.px100systems.util;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.output.StringBuilderWriter;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.Writer;
/**
* Simple JAXB-based XML parser
*
* @version 0.3
Copyright (c) 2015 Px100 Systems. All Rights Reserved.
* @author Alex Rogachevsky
*/
public class XmlParser {
private JAXBContext jaxb;
/**
* XML parser
* @param xmlClass class to parse into
*/
public XmlParser(Class xmlClass) {
try {
jaxb = JAXBContext.newInstance(xmlClass);
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}
/**
* Parse
* @param in input
* @return the parsed class
*/
@SuppressWarnings("unchecked")
public T parse(InputStream in) {
try {
return (T)jaxb.createUnmarshaller().unmarshal(in);
} catch (JAXBException e) {
throw new RuntimeException(e);
}
}
/**
* Parse
* @param data input
* @return the parsed class
*/
public T parse(byte[] data) {
InputStream in = null;
try {
in = new ByteArrayInputStream(data);
return parse(in);
} finally {
IOUtils.closeQuietly(in);
}
}
/**
* Serialize the bean to XML
* @param bean teh bean to serialize
* @return XML
*/
public String write(T bean) {
StringBuilder result = new StringBuilder();
Writer writer = new StringBuilderWriter(result);
try {
Marshaller m = jaxb.createMarshaller();
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
m.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);
m.marshal(bean, writer);
} catch (Exception e) {
throw new RuntimeException(e);
} finally {
IOUtils.closeQuietly(writer);
}
return result.toString();
}
}