xml byte array

[Sashi]

Hi, I'm using TIBCO rv to receive a message. This message has an XML
document. I can read this XML message into a byte array.
Now how do I output this array into a human readable form? (via the
console, for example). Any pointers would be appreciated.
TIA,
Sashi

 

[Thomas Fritsch]

[...] I can read this XML message into a byte array.
Now how do I output this array into a human readable form? (via the
console, for example). [...]

byte[] yourByteArray = ...
System.out.write(yourByteArray);

 

[Sashi]

[...] I can read this XML message into a byte array.
Now how do I output this array into a human readable form? (via the
console, for example). [...]

byte[] yourByteArray = ...
System.out.write(yourByteArray);

That simply seems to output the bit pattern for this bye array.
I did it by reading each byte off the array, casting it to a char and
appending it to a StringBuffer.
Sashi

 

[Oliver Wong]

I did it by reading each byte off the array, casting it to a char and
appending it to a StringBuffer.
Sashi

Generally, you shouldn't just cast byte to characters, as the conversion
from one to the other may be complicated depending on the encoding (UTF-16
uses at least 2 bytes per character, for example). Check out the
InputStreamReader class:

http://java.sun.com/j2se/1.5.0/docs/api/java/io/InputStreamReader.html

<quote>
An InputStreamReader is a bridge from byte streams to character streams: It
reads bytes and decodes them into characters using a specified charset. The
charset that it uses may be specified by name or may be given explicitly, or
the platform's default charset may be accepted.
</quote>

- Oliver

 

[Sashi]

Generally, you shouldn't just cast byte to characters, as the conversion
from one to the other may be complicated depending on the encoding (UTF-16
uses at least 2 bytes per character, for example). Check out the
InputStreamReader class:

http://java.sun.com/j2se/1.5.0/docs/api/java/io/InputStreamReader.html

<quote>
An InputStreamReader is a bridge from byte streams to character streams: It
reads bytes and decodes them into characters using a specified charset. The
charset that it uses may be specified by name or may be given explicitly, or
the platform's default charset may be accepted.
</quote>

- Oliver

Thanks, Oliver, I'll check it out.
Sashi

 

[iksrazal]

Sashi escreveu:

Hi, I'm using TIBCO rv to receive a message. This message has an XML
document. I can read this XML message into a byte array.
Now how do I output this array into a human readable form? (via the
console, for example). Any pointers would be appreciated.
TIA,
Sashi

Why are you reading the file into a byte array if all you want is the
document printed to the console ?

public static final String getDocumentAsString(Document document)
throws XMLHelperException
{
try
{
// Create source and result objects
Source source = new DOMSource(document);
StringWriter out = new StringWriter();
Result result = new StreamResult(out);
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
transformer.transform(source, result);
return out.toString();
}
catch(Exception e)
{
throw new XMLHelperException("XML Document to String Error", e);
}
}

Then just do:

System.out.println(yourString);

HTH,
iksrazal
www.braziloutsource.com

 

[Sashi]

Sashi escreveu:


Why are you reading the file into a byte array if all you want is the
document printed to the console ?

For the simple reason that TibrvMsg class provides a toByteArray()
method.

public static final String getDocumentAsString(Document document)
throws XMLHelperException
{
try
{
// Create source and result objects
Source source = new DOMSource(document);
StringWriter out = new StringWriter();
Result result = new StreamResult(out);
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
transformer.transform(source, result);
return out.toString();
}
catch(Exception e)
{
throw new XMLHelperException("XML Document to String Error", e);
}
}

Then just do:

System.out.println(yourString);

HTH,
iksrazal
www.braziloutsource.com

In terms of effort, extracting the byte array is easier on the
programmer.
Sashi