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How can I read or write the file in jar? [message #461218]

Sun, 07 January 2007 00:24

Eclipse User

Originally posted by: filot97.nate.com

My rcp package has the myRCP.jar in the plugin folder.
The myRCP.jar also has foo/property.xml file.
Then, how can I read or write the propety.xml.

Please, give me some code.
Thank you.

Re: How can I read or write the file in jar? [message #461219 is a reply to message #461218]

Sun, 07 January 2007 04:33

Eclipse User

You can't write to a Jar, but you can read from it by getClass().getResourceAsStream("/foo/property.xml") and then dealing with the returned InputStream. If you want to do writing of data then use the plugin's state location (from the bundle's getPluginStateLocation() if I remember) to read/write the file, and then use the property.xml as a template if there's no file in the property state location.

Alex.

Re: How can I read or write the file in jar? [message #461230 is a reply to message #461218]

Sun, 07 January 2007 10:36

Eclipse User

You might want to try something similar to the following:

private String getSchemaString() throws Exception
{
String schemaString = null;
try
{
JarFile jarFile = new JarFile (schemaJarFileName);
if (null == jarFile)
throw new Exception ("jarFile is null");

JarEntry schemaJarEntry = jarFile.getJarEntry("schema.ddl");
InputStream schemaInputStream = jarFile.getInputStream(schemaJarEntry);
int bytesAvailable = schemaInputStream.available();
char[] streamCharacterArray = new char [bytesAvailable];
InputStreamReader schemaInputReader = new InputStreamReader
(schemaInputStream);
schemaInputReader.read(streamCharacterArray);

schemaString = new String (streamCharacterArray);
return schemaString;
}// try
catch (Exception e)
{
System.out.println ("ERROR: getSchemaString() : " + e.toString());
throw new Exception (e);
}// catch (Exception e)
}// private String getSchemaString() throws Exception

Hope this helps,

Charlie

Oh Sangin wrote:
> My rcp package has the myRCP.jar in the plugin folder.
> The myRCP.jar also has foo/property.xml file.
> Then, how can I read or write the propety.xml.
>
> Please, give me some code.
> Thank you.

Re: How can I read or write the file in jar? [message #461243 is a reply to message #461230]

Sun, 07 January 2007 14:23

Eclipse User

Note that the 'getClass' method will access resources inside nested jars, whereas bundle.getEntry won't. Also, getClass will work when the library code is executed outside of the OSGi framework, whereas the latter will require the OSGi framework to be up and running in order to work.

Alex.

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