Package com.google.cloud.datastore

Class Blob

java.lang.Object

com.google.cloud.datastore.Blob

All Implemented Interfaces:

Serializable

public final class Blob
extends Object
implements Serializable

A Google Cloud Datastore Blob. This class is immutable.

See Also:

• Google Cloud Datastore Entities, Properties, and Keys
• Serialized Form

Method Summary

Modifier and Type	Method	Description
InputStream	asInputStream()	Returns an InputStream for this blob content.
ByteBuffer	asReadOnlyByteBuffer()	Returns a read-only ByteBuffer for this blob content.
static Blob	copyFrom(byte[] bytes)
static Blob	copyFrom(InputStream input)
static Blob	copyFrom(ByteBuffer bytes)
void	copyTo(byte[] target)	Copies bytes into a buffer.
void	copyTo(ByteBuffer target)	Copies bytes into a ByteBuffer.
boolean	equals(Object obj)
int	getLength()	Returns the size of this blob.
int	hashCode()
byte[]	toByteArray()	Returns a copy as byte array.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Details

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

getLength

public int getLength()

Returns the size of this blob.

toByteArray

public byte[] toByteArray()

Returns a copy as byte array.

asReadOnlyByteBuffer

public ByteBuffer asReadOnlyByteBuffer()

Returns a read-only ByteBuffer for this blob content.

asInputStream

public InputStream asInputStream()

Returns an InputStream for this blob content.

copyTo

public void copyTo(ByteBuffer target)

Copies bytes into a ByteBuffer.

Throws:

ReadOnlyBufferException - if the target is read-only

BufferOverflowException - if the target's remaining() space is not large enough to hold the data

copyTo

public void copyTo(byte[] target)

Copies bytes into a buffer.

Throws:

IndexOutOfBoundsException - if an offset or size is negative or too large

copyFrom

public static Blob copyFrom(byte[] bytes)

copyFrom

public static Blob copyFrom(ByteBuffer bytes)

copyFrom

public static Blob copyFrom(InputStream input)
                     throws IOException

Throws:

IOException