org.apache.derby.impl.sql
Class CursorInfo

java.lang.Object
  org.apache.derby.impl.sql.CursorInfo

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, Formatable, TypedFormat

public class CursorInfo
extends java.lang.Object
implements Formatable

A basic holder for information about cursors for execution.

See Also:

Serialized Form

Field Summary

(package private) ResultColumnDescriptor[]	targetColumns
(package private) ExecCursorTableReference	targetTable This class implements Formatable.
(package private) java.lang.String[]	updateColumns
(package private) int	updateMode

Constructor Summary

CursorInfo()
Niladic constructor for Formatable

CursorInfo(int updateMode, ExecCursorTableReference targetTable, ResultColumnDescriptor[] targetColumns, java.lang.String[] updateColumns)

Method Summary

int	getTypeFormatId() Get the formatID which corresponds to this class.
void	readExternal(java.io.ObjectInput in) Read this object from a stream of stored objects.
java.lang.String	toString()
void	writeExternal(java.io.ObjectOutput out) Write this object out

Methods inherited from class java.lang.Object

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

Field Detail

targetTable

ExecCursorTableReference targetTable

This class implements Formatable. That means that it can write itself to and from a formatted stream. If you add more fields to this class, make sure that you also write/read them with the writeExternal()/readExternal() methods. If, inbetween releases, you add more fields to this class, then you should bump the version number emitted by the getTypeFormatId() method.

targetColumns

ResultColumnDescriptor[] targetColumns

updateColumns

java.lang.String[] updateColumns

updateMode

int updateMode

Constructor Detail

CursorInfo

public CursorInfo()

Niladic constructor for Formatable

CursorInfo

public CursorInfo(int updateMode,
                  ExecCursorTableReference targetTable,
                  ResultColumnDescriptor[] targetColumns,
                  java.lang.String[] updateColumns)

Method Detail

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Write this object out

Specified by:

writeExternal in interface java.io.Externalizable

Parameters:

out - write bytes here

Throws:

java.io.IOException - thrown on error

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Read this object from a stream of stored objects.

Specified by:

readExternal in interface java.io.Externalizable

Parameters:

in - read this.

Throws:

java.io.IOException - thrown on error

java.lang.ClassNotFoundException - thrown on error

getTypeFormatId

public int getTypeFormatId()

Get the formatID which corresponds to this class.

Specified by:

getTypeFormatId in interface TypedFormat

Returns:

the formatID of this class

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object