GenericDatabaseTrigger.java
/*
** Module : GenericDatabaseTrigger.java
** Abstract : Abstract class to be extended by generic database triggers.
**
** Copyright (c) 2023, Golden Code Development Corporation.
**
** -#- -I- --Date-- -------------------------------- Description --------------------------------
** 001 OM 20230920 Created first version.
*/
/*
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU Affero General Public License as
** published by the Free Software Foundation, either version 3 of the
** License, or (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU Affero General Public License for more details.
**
** You may find a copy of the GNU Affero GPL version 3 at the following
** location: https://www.gnu.org/licenses/agpl-3.0.en.html
**
** Additional terms under GNU Affero GPL version 3 section 7:
**
** Under Section 7 of the GNU Affero GPL version 3, the following additional
** terms apply to the works covered under the License. These additional terms
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** Affero GPL version 3 and may not be removed by you.
**
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**
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**
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*/
package com.goldencode.p2j.persist.trigger;
import com.goldencode.p2j.persist.*;
import com.goldencode.p2j.util.*;
/**
* Abstract class to be extended by a generic database trigger implementation. This class extends the
* {@link DatabaseTrigger} and restrict the access interface only to the methods which can be called as
* callback when the triggers are executed:
* - the methods which are not called are made final and will just report the unexpected call;
* - the new callback for Assign was added with an empty body.
*/
public abstract class GenericDatabaseTrigger
extends DatabaseTrigger<Buffer>
{
/**
* Should be implemented to get a callback for a generic ASSIGN trigger.
*
* @param buf
* Buffer which contains the record that triggered the event.
* @param oldValueCopy
* A copy of the old value that was changed by assign statement. Even if this value
* can be overwritten, the change will be lost when exiting the trigger body block.
* @param fieldName
* The name of the field which have been changed.
*/
public void assign(Buffer buf, BaseDataType oldValueCopy, character fieldName)
{
}
/**
* Should be implemented to get a callback for a generic CREATE trigger.
*
* @param buf
* Buffer which contains the record which triggered the event.
*/
@Override
public void create(Buffer buf)
{
}
/**
* Should be implemented to get a callback for a generic DELETE trigger.
*
* @param buf
* Buffer which contains the record which triggered the event.
*/
@Override
public void delete(Buffer buf)
{
}
/**
* Should be implemented to get a callback for a generic FIND trigger.
*
* @param buf
* Buffer which contains the record which triggered the event.
*/
@Override
public void find(Buffer buf)
{
}
/**
* Should be implemented to get a callback for a generic WRITE trigger.
*
* @param newBuf
* Buffer which contains the new value of the record which triggered the event.
* @param oldBuf
* Buffer which contains the old value of the record which triggered the event.
*/
public void write(Buffer newBuf, Buffer oldBuf)
{
}
/**
* Disabled. Should NOT be implemented by an ASSIGN trigger.
*
* @param buf
* Buffer which contains the record that triggered the event.
* @param oldValueCopy
* A copy of the old value that was changed by assign statement. Even if this value
* can be overwritten, the change will be lost when exiting the trigger body block.
*/
@Override
public final void assign(Buffer buf, BaseDataType oldValueCopy)
{
}
/**
* Disabled. Should NOT be implemented by an ASSIGN trigger.
*
* @param buf
* Buffer which contains the record that triggered the event.
*/
@Override
public final void assign(Buffer buf)
{
}
/**
* Disabled. Should NOT be implemented by a SCHEMA ASSIGN trigger with NEW form (no field reference).
*
* @param newVal
* The value that triggered the event.
* @param oldValueCopy
* A copy of the old value that was changed by assign statement. Even if this value
* can be overwritten, the change will be lost when exiting the trigger body block.
*/
@Override
public final void assign(Undoable newVal, BaseDataType oldValueCopy)
{
}
/**
* Disabled. Should NOT be implemented by a SCHEMA ASSIGN trigger with NEW form (no field reference).
* This overloaded method does not pass in the old value.
*
* @param newVal
* The value that triggered the event.
*/
@Override
public final void assign(Undoable newVal)
{
}
/**
* Disabled. Should NOT be implemented by a WRITE trigger without OLD buffer specified.
*
* @param buf
* Buffer which contains the record which triggered the event.
*/
@Override
public final void write(Buffer buf)
{
}
/**
* Disabled. Should NOT be implemented by a REPLICATION-CREATE trigger.
*
* @param buf
* Buffer which contains the record which triggered the event.
*/
@Override
public final void replicationCreate(Buffer buf)
{
}
/**
* Disabled. Should NOT be implemented by a REPLICATION-DELETE trigger.
*
* @param buf
* Buffer which contains the record which triggered the event.
*/
@Override
public final void replicationDelete(Buffer buf)
{
}
/**
* Disabled. Should NOT be implemented by a REPLICATION-WRITE trigger without OLD buffer specified.
*
* @param buf
* Buffer which contains the record which triggered the event.
*/
@Override
public final void replicationWrite(Buffer buf)
{
}
/**
* Disabled. Should NOT be implemented by a REPLICATION-WRITE trigger with OLD buffer specified.
*
* @param newBuf
* Buffer which contains the new value of the record which triggered the event.
* @param oldBuf
* Buffer which contains the old value of the record which triggered the event.
*/
@Override
public final void replicationWrite(Buffer newBuf, Buffer oldBuf)
{
}
}