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Extension for Jackson (http://jackson.codehaus.org) to offer alternative support for serializing POJOs as XML and deserializing XML as pojos. Support implemented on top of Stax API (javax.xml.stream), by implementing core Jackson Streaming API types like JsonGenerator, JsonParser and JsonFactory. Some data-binding types overridden as well (ObjectMapper sub-classed as XmlMapper).

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package com.fasterxml.jackson.xml;

import org.codehaus.jackson.*;
import org.codehaus.jackson.map.*;
import org.codehaus.jackson.util.VersionUtil;

import com.fasterxml.jackson.xml.deser.FromXmlParser;
import com.fasterxml.jackson.xml.ser.ToXmlGenerator;
import com.fasterxml.jackson.xml.ser.XmlSerializerProvider;
import com.fasterxml.jackson.xml.util.XmlRootNameLookup;

/**
 * Customized {@link ObjectMapper} that will read and write XML instead of JSON,
 * using XML-backed {@link JsonFactory} implementation ({@link XmlFactory}).
 *
 * Mapper itself overrides some aspects of functionality to try to handle
 * data binding aspects as similar to JAXB as possible.
 * 
 * @since 1.7
 */
public class XmlMapper extends ObjectMapper
{
    /*
    /**********************************************************
    /* Life-cycle: construction, configuration
    /**********************************************************
     */

    public XmlMapper()
    {
        this(new XmlFactory());
    }
    
    public XmlMapper(XmlFactory xmlFactory)
    {
        /* Need to override serializer provider (due to root name handling);
         * deserializer provider fine as is
         */
        super(xmlFactory, new XmlSerializerProvider(new XmlRootNameLookup()), null);
        // but all the rest is done via Module interface!
        this.registerModule(new JacksonXmlModule());
    }

    /**
     * Method that will return version information stored in and read from jar
     * that contains this class.
     */
    @Override
    public Version version() {
        return VersionUtil.versionFor(getClass());
    }

    /*
    /**********************************************************
    /* Access to configuration settings
    /**********************************************************
     */

    public ObjectMapper configure(ToXmlGenerator.Feature f, boolean state) {
        ((XmlFactory)_jsonFactory).configure(f, state);
        return this;
    }

    public ObjectMapper configure(FromXmlParser.Feature f, boolean state) {
        ((XmlFactory)_jsonFactory).configure(f, state);
        return this;
    }
    
    /*
    /**********************************************************
    /* Overridden methods
    /**********************************************************
     */

    /**
     * XML indentation differs from JSON indentation, thereby
     * need to change default pretty-printer
     */
    @Override
    protected PrettyPrinter _defaultPrettyPrinter() {
        return null; // new DefaultPrettyPrinter();
    }
}