org.apache.cocoon.components.modules.database
Class PgsqlAutoIncrementModule

java.lang.Object
  |
  +--org.apache.cocoon.components.modules.database.PgsqlAutoIncrementModule

All Implemented Interfaces:

AutoIncrementModule, org.apache.avalon.framework.component.Component, org.apache.avalon.framework.thread.ThreadSafe

public class PgsqlAutoIncrementModule

extends java.lang.Object

implements AutoIncrementModule, org.apache.avalon.framework.thread.ThreadSafe

Abstraction layer to encapsulate different DBMS behaviour for autoincrement columns. Here: PostgreSQL sequences. The default sequence name is constructed from the table name, a "_", the column name, and the suffix "_seq". To use a different sequence name, set an attribute "sequence" for the modeConf e.g. <mode name="auto" type="auto" sequence="my_sequence"/>.

Version:

CVS $Id: PgsqlAutoIncrementModule.java,v 1.1.2.1 2002/11/17 19:12:50 haul Exp $

Author:

Philipp Hahn

Fields inherited from interface org.apache.cocoon.components.modules.database.AutoIncrementModule

ROLE

Constructor Summary

PgsqlAutoIncrementModule()

Method Summary

java.lang.Object	getPostValue(org.apache.avalon.framework.configuration.Configuration tableConf, org.apache.avalon.framework.configuration.Configuration columnConf, org.apache.avalon.framework.configuration.Configuration modeConf, java.sql.Connection conn, java.sql.Statement stmt, java.util.Map objectModel) Return key attribute value of last inserted row.
java.lang.Object	getPreValue(org.apache.avalon.framework.configuration.Configuration tableConf, org.apache.avalon.framework.configuration.Configuration columnConf, org.apache.avalon.framework.configuration.Configuration modeConf, java.sql.Connection conn, java.util.Map objectModel) Provide the value for the key attribute column.
java.lang.String	getSubquery(org.apache.avalon.framework.configuration.Configuration tableConf, org.apache.avalon.framework.configuration.Configuration columnConf, org.apache.avalon.framework.configuration.Configuration modeConf) Provide subquery string for the key attribute column.
boolean	includeAsValue() Boolean whether the key attribute needs to be included in the insert query as an attribute value (no subquery).
boolean	includeInQuery() Boolean whether the key attribute column needs to be included in the insert query.

Methods inherited from class java.lang.Object

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

Constructor Detail

PgsqlAutoIncrementModule

public PgsqlAutoIncrementModule()

Method Detail

getPostValue

public java.lang.Object getPostValue(org.apache.avalon.framework.configuration.Configuration tableConf,
                                     org.apache.avalon.framework.configuration.Configuration columnConf,
                                     org.apache.avalon.framework.configuration.Configuration modeConf,
                                     java.sql.Connection conn,
                                     java.sql.Statement stmt,
                                     java.util.Map objectModel)
                              throws java.sql.SQLException,
                                     org.apache.avalon.framework.configuration.ConfigurationException

Description copied from interface: AutoIncrementModule

Return key attribute value of last inserted row.

Specified by:

getPostValue in interface AutoIncrementModule

Following copied from interface: org.apache.cocoon.components.modules.database.AutoIncrementModule

Parameters:

name - a String that specifies what the caller thinks would identify a set of parameters. This is mainly a fallback if no modeConf is present.

tableConf - Table's configuration from resource description.

columnConf - column's configuration from resource description.

mdoeConf - this mode's configuration from resource description.

conn - Connection

stmt - Statement that was executed to insert the last row.

request - The request object

Returns:

value representing the last key value value.

includeInQuery

public boolean includeInQuery()

Description copied from interface: AutoIncrementModule

Boolean whether the key attribute column needs to be included in the insert query.

Specified by:

includeInQuery in interface AutoIncrementModule

Following copied from interface: org.apache.cocoon.components.modules.database.AutoIncrementModule

Returns:

true if the column is needed, false if the column should be skipped.

includeAsValue

public boolean includeAsValue()

Description copied from interface: AutoIncrementModule

Boolean whether the key attribute needs to be included in the insert query as an attribute value (no subquery).

Specified by:

includeAsValue in interface AutoIncrementModule

Following copied from interface: org.apache.cocoon.components.modules.database.AutoIncrementModule

Returns:

true if a value is needed, false if a subquery expression is used or the column is skipped altogether.

getPreValue

public java.lang.Object getPreValue(org.apache.avalon.framework.configuration.Configuration tableConf,
                                    org.apache.avalon.framework.configuration.Configuration columnConf,
                                    org.apache.avalon.framework.configuration.Configuration modeConf,
                                    java.sql.Connection conn,
                                    java.util.Map objectModel)
                             throws java.sql.SQLException,
                                    org.apache.avalon.framework.configuration.ConfigurationException

Description copied from interface: AutoIncrementModule

Provide the value for the key attribute column. If a value for the key value column is needed (i.e. the column is not skipped), this value is computed here.

Specified by:

getPreValue in interface AutoIncrementModule

Following copied from interface: org.apache.cocoon.components.modules.database.AutoIncrementModule

Parameters:

tableConf - Table's configuration from resource description.

columnConf - column's configuration from resource description.

mdoeConf - this mode's configuration from resource description.

conn - Connection

request - The request object

idx - In case of multiple rows to be inserted, index to the desired row

Returns:

exact value for key attribute column

getSubquery

public java.lang.String getSubquery(org.apache.avalon.framework.configuration.Configuration tableConf,
                                    org.apache.avalon.framework.configuration.Configuration columnConf,
                                    org.apache.avalon.framework.configuration.Configuration modeConf)
                             throws org.apache.avalon.framework.configuration.ConfigurationException

Description copied from interface: AutoIncrementModule

Provide subquery string for the key attribute column. If a value for the autoincrement column is needed (i.e. the column is not skipped), and the value can be determined through a nested subquery, this function provides the subquery as a string.

Specified by:

getSubquery in interface AutoIncrementModule

Following copied from interface: org.apache.cocoon.components.modules.database.AutoIncrementModule

Returns:

subquery string for autoincrement column.