org.apache.axiom.util.activation

## Class DataSourceUtils

- java.lang.Object
- - org.apache.axiom.util.activation.DataSourceUtils

-     public class DataSourceUtils
      extends Object

  Contains utility methods to work with `DataSource` objects.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `DataSourceUtils()`

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static long` | `getSize(javax.activation.DataSource ds)` Determine the size of the data represented by a `DataSource` object.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### DataSourceUtils

          public DataSourceUtils()

  - ### Method Detail

    - #### getSize

          public static long getSize(javax.activation.DataSource ds)

      Determine the size of the data represented by a `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.

      Parameters:
        `ds` - the data source
      Returns:
        (an estimation of) the size of the data or `-1` if the size is unknown

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