oracle.jbo.domain
Class BlobDomain

oracle.jbo.domain.BlobDomain

All Implemented Interfaces:

java.io.Serializable

public class BlobDomain

implements java.io.Serializable

This class provides a lightweight wrapper for oracle.sql.BLOB, the Java representation of the BLOB database type. This wrapper allows an instance of the oracle.sql.BLOB to be used as a domain object.

Since:

JDeveloper 3.0

See Also:

Serialized Form

Constructor Summary

BlobDomain()
Constructor for this object.

BlobDomain(BLOB blob)
Constructor for this object.

BlobDomain(BLOB blob, byte[] blobData)
Creates an instance of this class with data as described in blobData and using the transaction context from blob to use the blob-locator in the database.

BlobDomain(BlobDomain nblob, byte[] blobData)
Creates an instance of this class with data as described in blobData and using the transaction context from blob to use the blob-locator in the database.

BlobDomain(byte[] data)
Constructor for this class.

Method Summary

Type	Method
static BLOB	createEmptyBLOB(java.lang.Object context) Creates an empty Blob object.
boolean	equals(java.lang.Object obj) Tests for equality between this and obj.
java.io.OutputStream	getBinaryOutputStream()
java.io.InputStream	getBinaryStream()
int	getBufferSize()
byte[]	getBytes(long offset, int length)
int	getBytes(long pos, int length, byte[] buf)
long	getLength()
Node	getXMLContentNode(Document xmlDoc) Creates the XML node in the given XML document for this domain's data.
static oracle.jbo.domain.XMLDomainFactory	getXMLDomainFactory(java.lang.Class attrClass) Internal: Applications should not use this method.
protected java.lang.String	getXMLElementTag() Returns this class name as an XML-element tag for this Struct domain object.
void	prepareForDML(java.lang.Object context) Internal: Applications should not use this method.
java.lang.String	printXMLDefinition(java.util.Hashtable allDefs, java.io.PrintWriter pw, boolean bContainees) Prints the DTD information for this domain in the given print writer.
void	useBLOB(BLOB nBlob) Obselete

Constructor Detail

BlobDomain

public BlobDomain()

Constructor for this object.

BlobDomain

public BlobDomain(BLOB blob)

Constructor for this object. This is for use by JDBC. This constructor uses the transaction context from blob to use the blob-locator in the database.

Parameters:

blob - the BLOB from which to construct the BlobDomain.

BlobDomain

public BlobDomain(byte[] data)

Constructor for this class. Creates an instance of this class with data as described in blobData.

Parameters:

blobData - data for the BLOB.

BlobDomain

public BlobDomain(BLOB blob,
                  byte[] blobData)

Creates an instance of this class with data as described in blobData and using the transaction context from blob to use the blob-locator in the database.

Parameters:

blob - transaction context for the BLOB locator, as a BLOB object.

blobData - data for the BLOB.

BlobDomain

public BlobDomain(BlobDomain nblob,
                  byte[] blobData)

Creates an instance of this class with data as described in blobData and using the transaction context from blob to use the blob-locator in the database.

This constructor should be used by applications using the framework to create BlobDomain objects.

Parameters:

blob - transaction context for the BLOB locator as a BlobDomain object.

blobData - data for the BLOB.

Method Detail

useBLOB

public void useBLOB(BLOB nBlob)

Obselete

prepareForDML

public void prepareForDML(java.lang.Object context)

Internal: Applications should not use this method.

Parameters:

context - an internal framework context.

equals

public boolean equals(java.lang.Object obj)

Tests for equality between this and obj. Converts all the data into a String and compares the two strings. This is a default implementation of equals which could be overridden to perform more scalable application-specific comparisons.

Parameters:

obj - the data item to compare against.

getXMLElementTag

protected java.lang.String getXMLElementTag()

Returns this class name as an XML-element tag for this Struct domain object. Override this method to return a custom XML-element tag for this domain.

getXMLContentNode

public Node getXMLContentNode(Document xmlDoc)

Creates the XML node in the given XML document for this domain's data.

Parameters:

xmlDoc - name of the XML document.

printXMLDefinition

public java.lang.String printXMLDefinition(java.util.Hashtable allDefs,
                                           java.io.PrintWriter pw,
                                           boolean bContainees)

Prints the DTD information for this domain in the given print writer. Returns the DTD string to be added to this domain's container entity/domain.

Parameters:

allDefs - name of hashtable containing key-value pairs of XML tags and their values.

pw - printwriter on which the information should be printed.

bContainees - whether this domain container has containees.

getXMLDomainFactory

public static oracle.jbo.domain.XMLDomainFactory getXMLDomainFactory(java.lang.Class attrClass)

Internal: Applications should not use this method.

createEmptyBLOB

public static BLOB createEmptyBLOB(java.lang.Object context)

Creates an empty Blob object.

Parameters:

context - an internal framework context.

getBinaryOutputStream

public java.io.OutputStream getBinaryOutputStream()
                                           throws java.sql.SQLException

getBinaryStream

public java.io.InputStream getBinaryStream()

getBytes

public byte[] getBytes(long offset,
                       int length)

getLength

public long getLength()

getBufferSize

public int getBufferSize()

getBytes

public int getBytes(long pos,
                    int length,
                    byte[] buf)