Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (c) 2011, 2014 Eurotech and/or its affiliates
 *
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  which accompanies this distribution, and is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Eurotech
 */

import java.io.Reader;
import java.io.StringReader;

import java.text.MessageFormat;
import java.util.HashMap;
import java.util.Map;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;

import javax.xml.bind.UnmarshalException;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.ValidationEvent;
import javax.xml.bind.util.ValidationEventCollector;
import javax.xml.stream.FactoryConfigurationError;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;

public class Main {
    @SuppressWarnings("rawtypes")
    private static Map<Class, JAXBContext> s_contexts = new HashMap<Class, JAXBContext>();

    public static <T> T unmarshal(String s, Class<T> clazz)
            throws JAXBException, XMLStreamException, FactoryConfigurationError {
        StringReader sr = new StringReader(s);
        return unmarshal(sr, clazz);
    }

    public static <T> T unmarshal(Reader r, Class<T> clazz)
            throws JAXBException, XMLStreamException, FactoryConfigurationError {
        JAXBContext context = s_contexts.get(clazz);
        if (context == null) {
            context = JAXBContext.newInstance(clazz);
            s_contexts.put(clazz, context);
        }

        ValidationEventCollector valEventHndlr = new ValidationEventCollector();
        XMLStreamReader xmlsr = XMLInputFactory.newFactory().createXMLStreamReader(r);
        Unmarshaller unmarshaller = context.createUnmarshaller();
        unmarshaller.setSchema(null);
        unmarshaller.setEventHandler(valEventHndlr);

        JAXBElement<T> elem = null;
        try {
            elem = unmarshaller.unmarshal(xmlsr, clazz);
        } catch (Exception e) {
            if (e instanceof JAXBException) {
                throw (JAXBException) e;
            } else {
                throw new UnmarshalException(e.getMessage(), e);
            }
        }

        if (valEventHndlr.hasEvents()) {
            for (ValidationEvent valEvent : valEventHndlr.getEvents()) {
                if (valEvent.getSeverity() != ValidationEvent.WARNING) {
                    // throw a new Unmarshall Exception if there is a parsing error
                    String msg = MessageFormat.format("Line {0}, Col: {1}: {2}",
                            valEvent.getLocator().getLineNumber(), valEvent.getLocator().getColumnNumber(),
                            valEvent.getLinkedException().getMessage());
                    throw new UnmarshalException(msg, valEvent.getLinkedException());
                }
            }
        }
        return elem.getValue();
    }
}