DefaultXmlStreamWriter.java

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package com.sun.jersey.json.impl.writer;

import javax.xml.namespace.NamespaceContext;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;

import com.sun.jersey.json.impl.reader.JsonNamespaceContext;

/**
 * This class contains a default implementation of {@code XMLStreamWriter} methods that aren't expected of doing anything
 * (have empty body or return a {@code null} reference) in case of marshalling a {@code JAXBBean} into a JSON representation.
 *
 * @author Michal Gajdos (michal.gajdos at oracle.com)
 */
public abstract class DefaultXmlStreamWriter implements XMLStreamWriter {

    private NamespaceContext namespaceContext = null;

    @Override
    public NamespaceContext getNamespaceContext() {
        if (namespaceContext == null) {
            namespaceContext = new JsonNamespaceContext();
        }
        return namespaceContext;
    }

    @Override
    public String getPrefix(String uri) throws XMLStreamException {
        return getNamespaceContext().getPrefix(uri);
    }

    @Override
    public Object getProperty(String name) throws IllegalArgumentException {
        return null;
    }

    @Override
    public void setDefaultNamespace(String uri) throws XMLStreamException {
        // do nothing
    }

    @Override
    public void setNamespaceContext(NamespaceContext context) throws XMLStreamException {
        this.namespaceContext = context;
    }

    @Override
    public void setPrefix(String prefix, String uri) throws XMLStreamException {
        // do nothing
    }

    @Override
    public void writeCData(String data) throws XMLStreamException {
        writeCharacters(data);
    }

    @Override
    public void writeComment(String data) throws XMLStreamException {
        // do nothing
    }

    @Override
    public void writeDefaultNamespace(String namespaceURI) throws XMLStreamException {
        // do nothing
    }

    @Override
    public void writeDTD(String dtd) throws XMLStreamException {
        // do nothing
    }

    @Override
    public void writeEntityRef(String name) throws XMLStreamException {
        // do nothing
    }

    @Override
    public void writeNamespace(String prefix, String namespaceURI) throws XMLStreamException {
        // we do not want to deal with namespaces
        // the main goal of this writer is keep the produced json as simple as possible
    }

    @Override
    public void writeProcessingInstruction(String target) throws XMLStreamException {
        // do nothing
    }

    @Override
    public void writeProcessingInstruction(String target, String data) throws XMLStreamException {
        // do nothing
    }

    @Override
    public void writeStartDocument(String encoding, String version) throws XMLStreamException {
        // do nothing
    }

    @Override
    public void writeStartDocument(String version) throws XMLStreamException {
        // do nothing
    }

    public void writeStartDocument() throws XMLStreamException {
        // do nothing
    }
    
}