Java XML JAXB Serialize deserialize(Path input, Class clazz)

Description

deserialize

License

Open Source License

Declaration

public static <T> T deserialize(Path input, Class<T> clazz) throws IOException 

Method Source Code

//package com.java2s;
/*/*from  w  ww  .java 2s .  c  o m*/
JJSP - Java and Javascript Server Pages 
Copyright (C) 2016 Global Travel Ventures Ltd
    
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/.
*/

import javax.xml.bind.JAXBContext;

import javax.xml.bind.JAXBException;

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.stream.StreamSource;
import java.io.*;
import java.nio.file.Path;
import java.util.HashSet;
import java.util.Set;

public class Main {
    public static <T> T deserialize(Path input, Class<T> clazz) throws IOException {

        InputStream in = new FileInputStream(input.toFile());

        return deserialize(in, clazz);
    }

    public static <T> T deserialize(InputStream in, Class<T> clazz) {
        XMLInputFactory xif = XMLInputFactory.newFactory();

        StreamSource xml = new StreamSource(new InputStreamReader(in));

        String name = clazz.getSimpleName().trim();
        Set<String> names = new HashSet<>();

        try {
            XMLStreamReader xsr = xif.createXMLStreamReader(xml);

            while (xsr.hasNext()) {
                xsr.nextTag();
                String localName = xsr.getLocalName();
                names.add(localName);
                if (!localName.equals(name))
                    continue;
                return (T) getContext(clazz).createUnmarshaller().unmarshal(xsr);
            }
        } catch (Exception ex) {
            throw new IllegalStateException(ex);
        }

        throw new IllegalStateException("No elements with label " + name);
    }

    private static JAXBContext getContext(Class _class) {
        try {
            return JAXBContext.newInstance(_class);
        } catch (JAXBException jaxbe) {
            throw new IllegalStateException("Could not create JAXB context for class " + _class.getName(), jaxbe);
        }
    }
}

Related

1. deserialize(Class clazz, String filename)
2. deSerialize(Class docClass, InputStream inputStream)
3. deserialize(Element elmnt, Class cls)
4. deserialize(File fXMLFilePath, Class cls)
5. deserialize(final Class clazz, final String json)
6. deserialize(String data, String className)
7. deserializeFile(String path, Class clazz)
8. deserializeFromXmlFile(T defaultObject, String fileName)
9. deserializeXmlToJava(String valueType, Serializable value)