public class DataSourceUtils extends Object
DataSource
objects.Constructor and Description |
---|
DataSourceUtils() |
Modifier and Type | Method and Description |
---|---|
static long |
getSize(javax.activation.DataSource ds)
Determine the size of the data represented by a
DataSource object. |
public static long getSize(javax.activation.DataSource ds)
DataSource
object.
The method will try to determine the size without reading the data source.
It will do so by looking for the SizeAwareDataSource
interface. In addition, it
supports some other well known data source implementations for which it is possible to
get the size of the data without reading it.
As noted in the documentation of the SizeAwareDataSource
, the returned value
may be an estimation that is not 100% accurate, and code using this method must be prepared
to receive more or less data from the data source.
ds
- the data source-1
if the size is unknownCopyright © 2004-2013 The Apache Software Foundation. All Rights Reserved.