/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
***************************************************************************************
*/
package com.espertech.esper.client.soda;
import java.io.Serializable;
/**
* A clause to delete from a named window based on a triggering event arriving and correlated to the named window events to be deleted.
*/
public abstract class OnClause implements Serializable {
private static final long serialVersionUID = 0L;
/**
* Ctor.
*/
public OnClause() {
}
/**
* Creates an on-delete clause for deleting from a named window.
*
* @param windowName is the named window name
* @param asName is the as-provided name of the named window
* @return on-delete clause
*/
public static OnDeleteClause createOnDelete(String windowName, String asName) {
return OnDeleteClause.create(windowName, asName);
}
/**
* Creates a split-stream clause.
*
* @return split-stream on-insert clause
*/
public static OnInsertSplitStreamClause createOnInsertSplitStream() {
return OnInsertSplitStreamClause.create();
}
/**
* Creates an on-select clause for selecting from a named window.
*
* @param windowName is the named window name
* @param asName is the as-provided name of the named window
* @return on-select clause
*/
public static OnSelectClause createOnSelect(String windowName, String asName) {
return OnSelectClause.create(windowName, asName);
}
/**
* Creates an on-update clause for updating a named window.
*
* @param windowName is the named window name
* @param asName is the as-provided name of the named window
* @param expression expression
* @return on-update clause
*/
public static OnUpdateClause createOnUpdate(String windowName, String asName, Expression expression) {
return OnUpdateClause.create(windowName, asName).addAssignment(expression);
}
/**
* Creates an on-set clause for setting variable values.
*
* @param expression is the assignment expression
* @return on-set clause
*/
public static OnSetClause createOnSet(Expression expression) {
return OnSetClause.create(expression);
}
}