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jBasics is a collection of useful utility classes for Java. This includes helper for XML, mathematic functions, restful web services helper, pattern oriented programming interfaces and more. Currently Java7 and up is supported. Version 1.0 will required at leaset Java8.
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/*
 * Copyright (c) 2009-2015
 * 	IT-Consulting Stephan Schloepke (http://www.schloepke.de/)
 * 	klemm software consulting Mirko Klemm (http://www.klemm-scs.com/)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.jbasics.jaxb;

import org.jbasics.checker.ContractCheck;
import org.jbasics.enviroment.JVMEnviroment;
import org.jbasics.exception.DelegatedException;

import javax.xml.XMLConstants;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import java.io.File;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.net.URL;

public class JAXBSimpleTools {
	private final JAXBPool pool;

	public JAXBSimpleTools(final String contextPath) {
		this.pool = new JAXBPool(contextPath);
	}

	public JAXBSimpleTools(final String contextPath, final String schemaResource) {
		if (schemaResource != null) {
			try {
				SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
				Schema schema = factory.newSchema(JVMEnviroment.getNotNullResource(schemaResource));
				this.pool = new JAXBPool(contextPath, schema);
			} catch (Exception e) {
				throw DelegatedException.delegate(e);
			}
		} else {
			this.pool = new JAXBPool(contextPath);
		}
	}

	public JAXBSimpleTools(final String contextPath, final Schema schema) {
		this.pool = new JAXBPool(contextPath, schema);
	}

	public JAXBSimpleTools(final Class... classes) {
		this.pool = new JAXBPool(classes);
	}

	public static  String marshallToString(final JAXBElement element) {
		return new JAXBSimpleTools(element.getDeclaredType()).marshall(element);
	}

	public  String marshall(final T element) {
		Marshaller marshaller = this.pool.aquireMarshaller();
		try {
			marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
			StringWriter writer = new StringWriter();
			marshaller.marshal(element, writer);
			return writer.toString();
		} catch (JAXBException e) {
			throw DelegatedException.delegate(e);
		} finally {
			this.pool.releaseMarshaller(marshaller);
		}
	}

	public static  String marshallToString(final T element) {
		return new JAXBSimpleTools(element.getClass()).marshall(element);
	}

	public static  void marshallToFile(final T element, final File file) {
		new JAXBSimpleTools(element.getClass()).marshall(element, file);
	}

	public  void marshall(final T element, final File file) {
		Marshaller marshaller = this.pool.aquireMarshaller();
		try {
			marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
			marshaller.marshal(element, file);
		} catch (JAXBException e) {
			throw DelegatedException.delegate(e);
		} finally {
			this.pool.releaseMarshaller(marshaller);
		}
	}

	public static  T unmarshallFromString(final Class type, final String content) {
		return new JAXBSimpleTools(type).unmarshall(type, content);
	}

	public  T unmarshall(final Class type, final String content) {
		Unmarshaller unmarshaller = this.pool.aquireUnmarshaller();
		try {
			return unmarshaller.unmarshal(new StreamSource(new StringReader(content)), type).getValue();
		} catch (JAXBException e) {
			throw DelegatedException.delegate(e);
		} finally {
			this.pool.releaseUnmarshaller(unmarshaller);
		}
	}

	public static  T unmarshallFromURL(final Class type, final URL content) {
		return new JAXBSimpleTools(type).unmarshall(type, content);
	}

	public  T unmarshall(final Class type, final URL resource) {
		Unmarshaller unmarshaller = this.pool.aquireUnmarshaller();
		try {
			return unmarshaller.unmarshal(new StreamSource(ContractCheck.mustNotBeNull(resource, "resource").openStream()), type).getValue(); //$NON-NLS-1$
		} catch (JAXBException e) {
			throw DelegatedException.delegate(e);
		} catch (IOException e) {
			throw DelegatedException.delegate(e);
		} finally {
			this.pool.releaseUnmarshaller(unmarshaller);
		}
	}

	public JAXBPool getPool() {
		return this.pool;
	}

	public  T unmarshall(final Class type, final Class resourceBase, final String resourceName) {
		return unmarshall(type, ContractCheck.mustNotBeNull(resourceBase, "resourceBase").getResource( //$NON-NLS-1$
				ContractCheck.mustNotBeNull(resourceName, "resourceName"))); //$NON-NLS-1$
	}
}