// $Id: StreamResult.java,v 1.3.22.4 2004/07/13 22:27:51 jsuttor Exp $
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
/*
* @(#)StreamResult.java 1.15 04/07/13
*/
package javax.xml.transform.stream;
import javax.xml.transform.Result;
import java.io.File;
import java.io.OutputStream;
import java.io.Writer;
import java.net.MalformedURLException;
/**
* <p>Acts as an holder for a transformation result,
* which may be XML, plain Text, HTML, or some other form of markup.</p>
*
* @author <a href="Jeff.Suttor@Sun.com">Jeff Suttor</a>
*/
public class StreamResult implements Result {
/** If {@link javax.xml.transform.TransformerFactory#getFeature}
* 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.stream.StreamResult/feature";
/**
* Zero-argument default constructor.
*/
public StreamResult() {
}
/**
* Construct a StreamResult from a byte stream. Normally,
* a stream should be used rather than a reader, so that
* the transformer may use instructions contained in the
* transformation instructions to control the encoding.
*
* @param outputStream A valid OutputStream reference.
*/
public StreamResult(OutputStream outputStream) {
setOutputStream(outputStream);
}
/**
* Construct a StreamResult from a character stream. Normally,
* a stream should be used rather than a reader, so that
* the transformer may use instructions contained in the
* transformation instructions to control the encoding. However,
* there are times when it is useful to write to a character
* stream, such as when using a StringWriter.
*
* @param writer A valid Writer reference.
*/
public StreamResult(Writer writer) {
setWriter(writer);
}
/**
* Construct a StreamResult from a URL.
*
* @param systemId Must be a String that conforms to the URI syntax.
*/
public StreamResult(String systemId) {
this.systemId = systemId;
}
/**
* Construct a StreamResult from a File.
*
* @param f Must a non-null File reference.
*/
public StreamResult(File f) {
setSystemId(f);
}
/**
* Set the ByteStream that is to be written to. Normally,
* a stream should be used rather than a reader, so that
* the transformer may use instructions contained in the
* transformation instructions to control the encoding.
*
* @param outputStream A valid OutputStream reference.
*/
public void setOutputStream(OutputStream outputStream) {
this.outputStream = outputStream;
}
/**
* Get the byte stream that was set with setOutputStream.
*
* @return The byte stream that was set with setOutputStream, or null
* if setOutputStream or the ByteStream constructor was not called.
*/
public OutputStream getOutputStream() {
return outputStream;
}
/**
* Set the writer that is to receive the result. Normally,
* a stream should be used rather than a writer, so that
* the transformer may use instructions contained in the
* transformation instructions to control the encoding. However,
* there are times when it is useful to write to a writer,
* such as when using a StringWriter.
*
* @param writer A valid Writer reference.
*/
public void setWriter(Writer writer) {
this.writer = writer;
}
/**
* Get the character stream that was set with setWriter.
*
* @return The character stream that was set with setWriter, or null
* if setWriter or the Writer constructor was not called.
*/
public Writer getWriter() {
return writer;
}
/**
* Set the systemID that may be used in association
* with the byte or character stream, or, if neither is set, use
* this value as a writeable URI (probably a file name).
*
* @param systemId The system identifier as a URI string.
*/
public void setSystemId(String systemId) {
this.systemId = systemId;
}
/**
* <p>Set the system ID from a <code>File</code> reference.</p>
*
* <p>Note the use of {@link File#toURI()} and {@link File#toURL()}.
* <code>toURI()</code> is prefered and used if possible.
* To allow JAXP 1.3 to run on J2SE 1.3, <code>toURL()</code>
* is used if a {@link NoSuchMethodException} is thrown by the attempt
* to use <code>toURI()</code>.</p>
*
* @param f Must a non-null File reference.
*/
public void setSystemId(File f) {
try {
// assume >= 1.4
this.systemId = f.toURI().toString();
} catch (java.lang.NoSuchMethodError nme) {
// running on J2SE 1.3?
try {
this.systemId = f.toURL().toString();
} catch (MalformedURLException malformedURLException) {
this.systemId = null;
throw new RuntimeException(
"javax.xml.transform.stream.StreamResult#setSystemId(File f) with MalformedURLException: "
+ malformedURLException.toString()
);
}
} catch (Exception exception) {
throw new RuntimeException(
"javax.xml.transform.stream.StreamResult#setSystemId(File f):"
+ " unexpected Exception: " + exception.toString()
);
}
}
/**
* Get the system identifier that was set with setSystemId.
*
* @return The system identifier that was set with setSystemId, or null
* if setSystemId was not called.
*/
public String getSystemId() {
return systemId;
}
//////////////////////////////////////////////////////////////////////
// Internal state.
//////////////////////////////////////////////////////////////////////
/**
* The systemID that may be used in association
* with the byte or character stream, or, if neither is set, use
* this value as a writeable URI (probably a file name).
*/
private String systemId;
/**
* The byte stream that is to be written to.
*/
private OutputStream outputStream;
/**
* The character stream that is to be written to.
*/
private Writer writer;
}
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