org.apache.ode.daohib.bpel.hobj
Class GZipDataType

java.lang.Object
  org.apache.ode.daohib.bpel.hobj.GZipDataType

All Implemented Interfaces:

org.hibernate.usertype.UserType

public class GZipDataType
extends java.lang.Object
implements org.hibernate.usertype.UserType

Custom Hibernate datatype that compresses (GZip) byte arrays to increase performance and save disk space.

Field Summary

static byte[]	GZIP_PREFIX For backward compatibility with non-zipped data, prefix the gzip stream with a magic sequence
static java.lang.Class	RETURNED_CLASS
static int[]	SQL_TYPES

Constructor Summary

GZipDataType()

Method Summary

java.lang.Object	assemble(java.io.Serializable cached, java.lang.Object owner) Reconstruct an object from the cacheable representation
java.lang.Object	deepCopy(java.lang.Object value) Return a deep copy of the persistent state
java.io.Serializable	disassemble(java.lang.Object value) Transform the object into its cacheable representation
boolean	equals(java.lang.Object x, java.lang.Object y) Compare two instances of the class mapped by this type for persistence "equality".
static byte[]	gunzip(java.io.InputStream input) Decompress (using gzip algorithm) a byte array.
static void	gzip(byte[] content, java.io.OutputStream out) Compress (using gzip algorithm) a byte array into an output stream.
int	hashCode(java.lang.Object x) Get a hashcode for the instance, consistent with persistence "equality"
boolean	isMutable() Are objects of this type mutable?
java.lang.Object	nullSafeGet(java.sql.ResultSet rs, java.lang.String[] names, java.lang.Object owner) Retrieve an instance of the mapped class from a JDBC resultset.
void	nullSafeSet(java.sql.PreparedStatement st, java.lang.Object value, int index) Write an instance of the mapped class to a prepared statement.
java.lang.Object	replace(java.lang.Object original, java.lang.Object target, java.lang.Object owner) During merge, replace the existing (target) value in the entity we are merging to with a new (original) value from the detached entity we are merging.
java.lang.Class	returnedClass() The class returned by nullSafeGet().
int[]	sqlTypes() Return the SQL type codes for the columns mapped by this type.

Methods inherited from class java.lang.Object

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

Field Detail

SQL_TYPES

public static final int[] SQL_TYPES

RETURNED_CLASS

public static final java.lang.Class RETURNED_CLASS

GZIP_PREFIX

public static final byte[] GZIP_PREFIX

For backward compatibility with non-zipped data, prefix the gzip stream with a magic sequence

Constructor Detail

GZipDataType

public GZipDataType()

Method Detail

assemble

public java.lang.Object assemble(java.io.Serializable cached,
                                 java.lang.Object owner)

Reconstruct an object from the cacheable representation

Specified by:

assemble in interface org.hibernate.usertype.UserType

disassemble

public java.io.Serializable disassemble(java.lang.Object value)

Transform the object into its cacheable representation

Specified by:

disassemble in interface org.hibernate.usertype.UserType

deepCopy

public java.lang.Object deepCopy(java.lang.Object value)

Return a deep copy of the persistent state

Specified by:

deepCopy in interface org.hibernate.usertype.UserType

equals

public boolean equals(java.lang.Object x,
                      java.lang.Object y)

Compare two instances of the class mapped by this type for persistence "equality".

Specified by:

equals in interface org.hibernate.usertype.UserType

hashCode

public int hashCode(java.lang.Object x)

Get a hashcode for the instance, consistent with persistence "equality"

Specified by:

hashCode in interface org.hibernate.usertype.UserType

isMutable

public boolean isMutable()

Are objects of this type mutable?

Specified by:

isMutable in interface org.hibernate.usertype.UserType

nullSafeGet

public java.lang.Object nullSafeGet(java.sql.ResultSet rs,
                                    java.lang.String[] names,
                                    java.lang.Object owner)
                             throws java.sql.SQLException

Retrieve an instance of the mapped class from a JDBC resultset.

Specified by:

nullSafeGet in interface org.hibernate.usertype.UserType

Throws:

java.sql.SQLException

nullSafeSet

public void nullSafeSet(java.sql.PreparedStatement st,
                        java.lang.Object value,
                        int index)
                 throws java.sql.SQLException

Write an instance of the mapped class to a prepared statement.

Specified by:

nullSafeSet in interface org.hibernate.usertype.UserType

Throws:

java.sql.SQLException

replace

public java.lang.Object replace(java.lang.Object original,
                                java.lang.Object target,
                                java.lang.Object owner)

During merge, replace the existing (target) value in the entity we are merging to with a new (original) value from the detached entity we are merging.

Specified by:

replace in interface org.hibernate.usertype.UserType

returnedClass

public java.lang.Class returnedClass()

The class returned by nullSafeGet().

Specified by:

returnedClass in interface org.hibernate.usertype.UserType

sqlTypes

public int[] sqlTypes()

Return the SQL type codes for the columns mapped by this type.

Specified by:

sqlTypes in interface org.hibernate.usertype.UserType

gzip

public static void gzip(byte[] content,
                        java.io.OutputStream out)

Compress (using gzip algorithm) a byte array into an output stream.

gunzip

public static byte[] gunzip(java.io.InputStream input)

Decompress (using gzip algorithm) a byte array.