org.apache.axiom.util.activation

Class EmptyDataSource

java.lang.Object

org.apache.axiom.util.activation.EmptyDataSource

All Implemented Interfaces:

javax.activation.DataSource, SizeAwareDataSource

public class EmptyDataSource
extends java.lang.Object
implements SizeAwareDataSource

A data source with empty (zero length) content.

Field Summary

Fields

Modifier and Type	Field and Description
private java.lang.String	contentType
private static java.io.InputStream	emptyInputStream
static EmptyDataSource	INSTANCE Empty data source instance with content type application/octet-stream.

Constructor Summary

Constructors

Constructor and Description
EmptyDataSource(java.lang.String contentType) Construct an empty data source with the given content type.

Method Summary

Modifier and Type	Method and Description
java.lang.String	getContentType()
java.io.InputStream	getInputStream()
java.lang.String	getName()
java.io.OutputStream	getOutputStream()
long	getSize() Get the size of the data source.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final EmptyDataSource INSTANCE

Empty data source instance with content type application/octet-stream.

emptyInputStream

private static final java.io.InputStream emptyInputStream

contentType

private final java.lang.String contentType

Constructor Detail

EmptyDataSource

public EmptyDataSource(java.lang.String contentType)

Construct an empty data source with the given content type.

Parameters:

contentType - the content type

Method Detail

getContentType

public java.lang.String getContentType()

Specified by:

getContentType in interface javax.activation.DataSource

getName

public java.lang.String getName()

Specified by:

getName in interface javax.activation.DataSource

getSize

public long getSize()

Description copied from interface: SizeAwareDataSource

Get the size of the data source. Implementations must return the number of bytes that can be read from the input stream returned by DataSource.getInputStream() before reaching the end of the stream. If the implementation is unable to determine the size, it must return -1.

Specified by:

getSize in interface SizeAwareDataSource

Returns:

the size of the data source or -1 if the size is not known

getInputStream

public java.io.InputStream getInputStream()
                                   throws java.io.IOException

Specified by:

getInputStream in interface javax.activation.DataSource

Throws:

java.io.IOException

getOutputStream

public java.io.OutputStream getOutputStream()
                                     throws java.io.IOException

Specified by:

getOutputStream in interface javax.activation.DataSource

Throws:

java.io.IOException