com.informix.jdbc

Class IfxLocator

java.lang.Object

com.informix.jdbc.IfxLocator

public class IfxLocator
extends java.lang.Object

The IfxLocator class (known as the locator pointer or large object locator) is the communication link between the database server and the client for a particular large object. Before it creates a large object or opens a large object for reading or writing, an application must create a IfxLocator object.

Field Summary

Fields

Modifier and Type	Field and Description
static int	IFX_LOCATOR_SIZE

Constructor Summary

Constructors

Constructor and Description
IfxLocator() Creates a default IfxLocator.
IfxLocator(byte[] byteBuf) Creates an IfxLocator using the byte array.
IfxLocator(byte[] lo_ptr, java.sql.Connection conn) Creates an IfxLocator using the byte array format.
IfxLocator(java.sql.Connection conn) Creates a IfxLocator.
IfxLocator(IfxLocator loc)

Method Summary

Modifier and Type	Method and Description
int	decRefCount() decRefCount() decrements the reference count of this large object.
void	free() Frees the resource associated with this location.
int	incRefCount() incRefCount() increments the reference count of this large object.
byte[]	toBytes() toBytes() This method can be used to return the locator in its raw byte[] format.
java.lang.String	toString() toString() This method can be used to return the locator in its hexadecimal string format.

Methods inherited from class java.lang.Object

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

Field Detail

IFX_LOCATOR_SIZE

public static final int IFX_LOCATOR_SIZE

See Also:

Constant Field Values

Constructor Detail

IfxLocator

public IfxLocator()

Creates a default IfxLocator.

IfxLocator

public IfxLocator(IfxLocator loc)

IfxLocator

public IfxLocator(java.sql.Connection conn)

Creates a IfxLocator.

Parameters:

conn - the java.sql.Connection object

IfxLocator

public IfxLocator(byte[] byteBuf)
           throws java.sql.SQLException

Creates an IfxLocator using the byte array.

Parameters:

byteBuf - the byte array containing the locator pointer

Throws:

java.sql.SQLException

IfxLocator

public IfxLocator(byte[] lo_ptr,
                  java.sql.Connection conn)

Creates an IfxLocator using the byte array format.

Parameters:

lo_ptr - the byte array containing the locator pointer

conn - the java.sql.Connection object

Method Detail

incRefCount

public int incRefCount()
                throws java.sql.SQLException

incRefCount() increments the reference count of this large object. This function is useful for manually tracking multiple references to the same smartlarge object. Typical use for this function would be in the assign() support function to increment the reference count of the new smart large object. This method is only supported in the server-side JDBC. Attempts to use this method from a client program will raise an SQLException.

Returns:

Reference count after the increment

Throws:

java.sql.SQLException - if there is an error or if using client JDBC

decRefCount

public int decRefCount()
                throws java.sql.SQLException

decRefCount() decrements the reference count of this large object. This function is useful for manually tracking multiple references to the same smart large object. Typical use for this function would be in the destroy() support function to decrement the reference count of the new smart large object. This method is only supported in the server-side JDBC. Attempts to use this method from a client program will raise an SQLException.

Returns:

Reference count after the decrement

Throws:

java.sql.SQLException - if there is an error or if using client JDBC

toString

public java.lang.String toString()

toString() This method can be used to return the locator in its hexadecimal string format. The output is similar to the output produced by Long.toHexString(i) except that leading zeros are preserved.

Overrides:

toString in class java.lang.Object

Returns:

the string representation of this instance's raw locator in hexadecimal (base 16).

toBytes

public byte[] toBytes()

toBytes() This method can be used to return the locator in its raw byte[] format.

Returns:

the raw locator as a byte[].

free

public void free()

Frees the resource associated with this location.