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package javax.xml.transform.stax;

import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.Result;


Acts as a holder for an XML Result in the form of a StAX writer,i.e. XMLStreamWriter or XMLEventWriter. StAXResult can be used in all cases that accept
a Result, e.g. Transformer, Validator which accept Result as input.

Author:Neeraj Bajaj, Jeff Suttor
See Also:
Since:1.6
/**
 * <p>Acts as a holder for an XML {@link Result} in the
 * form of a StAX writer,i.e.
 * {@link XMLStreamWriter} or {@link XMLEventWriter}.
 * <code>StAXResult</code> can be used in all cases that accept
 * a <code>Result</code>, e.g. {@link javax.xml.transform.Transformer},
 * {@link javax.xml.validation.Validator} which accept
 * <code>Result</code> as input.
 *
 * @author Neeraj Bajaj
 * @author Jeff Suttor
 *
 * @see <a href="http://jcp.org/en/jsr/detail?id=173">
 *  JSR 173: Streaming API for XML</a>
 * @see XMLStreamWriter
 * @see XMLEventWriter
 *
 * @since 1.6
 */
public class StAXResult implements Result {
    
If TransformerFactory.getFeature(String name) returns true when passed this value as an argument, the Transformer supports Result output of this type. 
/** If {@link javax.xml.transform.TransformerFactory#getFeature(String name)}
     * returns true when passed this value as an argument,
     * the Transformer supports Result output of this type.
     */
    public static final String FEATURE =
        "http://javax.xml.transform.stax.StAXResult/feature";

    
XMLEventWriter to be used for
Result output.


/**
     * <p><code>XMLEventWriter</code> to be used for
     * <code>Result</code> output.</p>
     */
    private XMLEventWriter xmlEventWriter = null;

    
XMLStreamWriter to be used for
Result output.


/**
     * <p><code>XMLStreamWriter</code> to be used for
     * <code>Result</code> output.</p>
     */
    private XMLStreamWriter xmlStreamWriter = null;

    
System identifier for this StAXResult.
 
/** <p>System identifier for this <code>StAXResult</code>.<p> */
    private String systemId = null;

    
Creates a new instance of a StAXResult by supplying an XMLEventWriter.


XMLEventWriter must be a
non-null reference.


Params:
  • xmlEventWriter – XMLEventWriter used to create
  this StAXResult.
Throws:
/**
     * <p>Creates a new instance of a <code>StAXResult</code>
     * by supplying an {@link XMLEventWriter}.</p>
     *
     * <p><code>XMLEventWriter</code> must be a
     * non-<code>null</code> reference.</p>
     *
     * @param xmlEventWriter <code>XMLEventWriter</code> used to create
     *   this <code>StAXResult</code>.
     *
     * @throws IllegalArgumentException If <code>xmlEventWriter</code> ==
     *   <code>null</code>.
     */
    public StAXResult(final XMLEventWriter xmlEventWriter) {

        if (xmlEventWriter == null) {
            throw new IllegalArgumentException(
                    "StAXResult(XMLEventWriter) with XMLEventWriter == null");
        }

        this.xmlEventWriter = xmlEventWriter;
    }

    
Creates a new instance of a StAXResult by supplying an XMLStreamWriter.


XMLStreamWriter must be a
non-null reference.


Params:
  • xmlStreamWriter – XMLStreamWriter used to create
  this StAXResult.
Throws:
/**
     * <p>Creates a new instance of a <code>StAXResult</code>
     * by supplying an {@link XMLStreamWriter}.</p>
     *
     * <p><code>XMLStreamWriter</code> must be a
     * non-<code>null</code> reference.</p>
     *
     * @param xmlStreamWriter <code>XMLStreamWriter</code> used to create
     *   this <code>StAXResult</code>.
     *
     * @throws IllegalArgumentException If <code>xmlStreamWriter</code> ==
     *   <code>null</code>.
     */
    public StAXResult(final XMLStreamWriter xmlStreamWriter) {

        if (xmlStreamWriter == null) {
            throw new IllegalArgumentException(
                    "StAXResult(XMLStreamWriter) with XMLStreamWriter == null");
        }

        this.xmlStreamWriter = xmlStreamWriter;
    }

    
Get the XMLEventWriter used by this
StAXResult.


XMLEventWriter will be null
if this StAXResult was created with a
XMLStreamWriter.


Returns:XMLEventWriter used by this
  StAXResult.
/**
     * <p>Get the <code>XMLEventWriter</code> used by this
     * <code>StAXResult</code>.</p>
     *
     * <p><code>XMLEventWriter</code> will be <code>null</code>
     * if this <code>StAXResult</code> was created with a
     * <code>XMLStreamWriter</code>.</p>
     *
     * @return <code>XMLEventWriter</code> used by this
     *   <code>StAXResult</code>.
     */
    public XMLEventWriter getXMLEventWriter() {

        return xmlEventWriter;
    }

    
Get the XMLStreamWriter used by this
StAXResult.


XMLStreamWriter will be null
if this StAXResult was created with a
XMLEventWriter.


Returns:XMLStreamWriter used by this
  StAXResult.
/**
     * <p>Get the <code>XMLStreamWriter</code> used by this
     * <code>StAXResult</code>.</p>
     *
     * <p><code>XMLStreamWriter</code> will be <code>null</code>
     * if this <code>StAXResult</code> was created with a
     * <code>XMLEventWriter</code>.</p>
     *
     * @return <code>XMLStreamWriter</code> used by this
     *   <code>StAXResult</code>.
     */
    public XMLStreamWriter getXMLStreamWriter() {

        return xmlStreamWriter;
    }

    
In the context of a StAXResult, it is not appropriate
to explicitly set the system identifier.
The XMLEventWriter or XMLStreamWriter
used to construct this StAXResult determines the
system identifier of the XML result.


An UnsupportedOperationException is always
thrown by this method.


Params:
  • systemId – Ignored.
Throws:
/**
     * <p>In the context of a <code>StAXResult</code>, it is not appropriate
     * to explicitly set the system identifier.
     * The <code>XMLEventWriter</code> or <code>XMLStreamWriter</code>
     * used to construct this <code>StAXResult</code> determines the
     * system identifier of the XML result.</p>
     *
     * <p>An {@link UnsupportedOperationException} is <strong>always</strong>
     * thrown by this method.</p>
     *
     * @param systemId Ignored.
     *
     * @throws UnsupportedOperationException Is <strong>always</strong>
     *   thrown by this method.
     */
    public void setSystemId(final String systemId) {

        throw new UnsupportedOperationException(
                "StAXResult#setSystemId(systemId) cannot set the "
                + "system identifier for a StAXResult");
    }

    
The returned system identifier is always null.


Returns:The returned system identifier is always null.
/**
     * <p>The returned system identifier is always <code>null</code>.</p>
     *
     * @return The returned system identifier is always <code>null</code>.
     */
    public String getSystemId() {

        return null;
    }
}