callout.java

Java写的ERP系统

/******************************************************************************
 * The contents of this file are subject to the   Compiere License  Version 1.1
 * ("License"); You may not use this file except in compliance with the License
 * You may obtain a copy of the License at http://www.compiere.org/license.html
 * Software distributed under the License is distributed on an  "AS IS"  basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific language governing rights and limitations under the License.
 * The Original Code is                  Compiere  ERP & CRM  Business Solution
 * The Initial Developer of the Original Code is Jorg Janke  and ComPiere, Inc.
 * Portions created by Jorg Janke are Copyright (C) 1999-2001 Jorg Janke, parts
 * created by ComPiere are Copyright (C) ComPiere, Inc.;   All Rights Reserved.
 * Contributor(s): ______________________________________.
 *****************************************************************************/
package org.compiere.model;

import java.util.*;

/**
 *  Callout Interface for Callout.
 *  Used in MTab and ImpFormatRow
 *
 *  @author     Jorg Janke
 *  @version    $Id: Callout.java,v 1.3 2002/08/12 01:55:12 danb Exp $
 */
public interface Callout
{
	/**
	 *	Start Callout.
	 *  <p>
	 *	Callout's are used for cross field validation and setting values in other fields
	 *	when returning a non empty (error message) string, an exception is raised
	 *  <p>
	 *	When invoked, the Tab model has the new value!
	 *
	 *  @param ctx      Context
	 *  @param method   Method name
	 *  @param WindowNo current Window No
	 *  @param mTab     Model Tab
	 *  @param mField   Model Field
	 *  @param value    The new value
	 *  @param oldValue The old value
	 *  @return Error message or ""
	 */
	public String start (Properties ctx, String method, int WindowNo,
		MTab mTab, MField mField, Object value, Object oldValue);

	/**
	 *	Conversion Rules.
	 *	Convert a String
	 *
	 *	@param method   in notation User_Function
	 *  @param value    the value
	 *	@return converted String or Null if no method found
	 */
	public String convert (String method, String value);

}   //  callout