Package org.apache.axiom.blob

Class AbstractWritableBlob

java.lang.Object

org.apache.axiom.blob.AbstractWritableBlob

All Implemented Interfaces:

Blob, WritableBlob

public abstract class AbstractWritableBlob
extends Object
implements WritableBlob

Partial implementation of the WritableBlob interface that implements WritableBlob.readFrom(InputStream) using WritableBlob.getOutputStream() and Blob.writeTo(OutputStream) using Blob.getInputStream().

Constructor Summary

Constructors

Constructor	Description
AbstractWritableBlob()

Method Summary

Modifier and Type	Method	Description
long	readFrom(InputStream in)	Read data from the given input stream and write it to the blob.
void	writeTo(OutputStream out)	Write the data to a given output stream.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.axiom.blob.Blob

getInputStream, getSize

Methods inherited from interface org.apache.axiom.blob.WritableBlob

getOutputStream, release

Constructor Detail

AbstractWritableBlob

public AbstractWritableBlob()

Method Detail

readFrom

public long readFrom(InputStream in)
              throws StreamCopyException

Description copied from interface: WritableBlob

Read data from the given input stream and write it to the blob.

A call to this method has the same effect as requesting an output stream using WritableBlob.getOutputStream() and copying the data from the input stream to that output stream, but the implementation may achieve this result in a more efficient way.

The blob must be in state NEW when this method is called. It will be in state COMMITTED after this method completes successfully.

The method transfers data from the input stream to the blob until the end of the input stream is reached.

Specified by:

readFrom in interface WritableBlob

Parameters:

in - An input stream to read data from. This method will not close the stream.

Returns:

the number of bytes transferred

Throws:

StreamCopyException

writeTo

public void writeTo(OutputStream out)
             throws StreamCopyException

Description copied from interface: Blob

Write the data to a given output stream. This method can be called multiple times, i.e. it doesn't consume the content.

Specified by:

writeTo in interface Blob

Parameters:

out - The output stream to write the data to. This method will not close the stream.

Throws:

StreamCopyException - Thrown if there is an I/O when reading the data from the blob or when writing it to the stream. StreamCopyException.getOperation() can be used to determine whether the failed operation was a read or a write.