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I am new to javax.xml.transform.Transformer.
I am applying an XSLT on an XML document and It works fine.
What I want to achieve is to be able to write the output of that tranformation to an OutputStream.
This is my code:
OutputStream outputStream = null;
InputStream agent = new FileInputStream("src/res/testxmlfile.xml");
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer(new StreamSource("src/res/trans.xslt"));
transformer.transform(new StreamSource(agent), outputStream ????????);
I know it can be used to write a file like this, but I want to write it to a OutputStream Object.
transformer.transform(new StreamSource(agent),
new StreamResult(new FileOutputStream("/result.xml")));
How can I pass an OutputStream to be used here?
This is the error I am getting when I am passing the Outputstream:
Exception in thread "main" javax.xml.transform.TransformerException:
Result object passed to ''{0}'' is invalid.
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl
.getOutputHandler(TransformerImpl.java:468)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl
.transform(TransformerImpl.java:344)
at com.gohealth.TestXmlStream.main(TestXmlStream.java:75)
732
Methods of OutputStream. 1 write () - writes the specified byte to the output stream. 2 write (byte [] array) - writes the bytes from the specified array to the output stream. 3 flush () - forces to write all data present in output stream to the destination. 4 close () - closes the output stream.
It is because OutputStream is an abstract class, so we cannot create an object of OutputStream. Note: We can also create the output stream from other subclasses of the OutputStream class. The OutputStream class provides different methods that are implemented by its subclasses.
As the name suggests, a FileOutputStream is an OutputStream to write data to a File. FileOutputStream, like any other OutputStream, can write a stream of raw bytes. We have already examined different methods in FileOutputStream as part of the last section. 5.2. ByteArrayOutputStream
OutputStream is an abstract class that enables you to write data to an output sink or destination. As with InputStream, that destination could be a console, a file, a socket, a pipe and even a buffer in memory. The most basic and fundamental thing you can do with an OutputStream is write a sequence of bytes to it.
Use a StreamResult. It provides constructors to write to a File or an OutputStream:
Example using File:
transformer.transform(new StreamSource(agent), new StreamResult(file));
Example using FileOutputStream:
FileOutputStream outputStream = new FileOutputStream(new File("outputfile.xml"));
transformer.transform(new StreamSource(agent), new StreamResult(outputStream));
Example using ByteArrayOutputStream:
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
transformer.transform(new StreamSource(agent), new StreamResult(outputStream));
byte[] bytes = outputStream.toByteArray();`
Use a "StreamResult" constructed with an object that represents where you want the output. See http://docs.oracle.com/javase/7/docs/api/javax/xml/transform/stream/StreamResult.html
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