001 /** 002 * ======================================== 003 * JFreeReport : a free Java report library 004 * ======================================== 005 * 006 * Project Info: http://reporting.pentaho.org/ 007 * 008 * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors. 009 * 010 * This library is free software; you can redistribute it and/or modify it under the terms 011 * of the GNU Lesser General Public License as published by the Free Software Foundation; 012 * either version 2.1 of the License, or (at your option) any later version. 013 * 014 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 015 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 016 * See the GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public License along with this 019 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 020 * Boston, MA 02111-1307, USA. 021 * 022 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 023 * in the United States and other countries.] 024 * 025 * ------------ 026 * $Id: GetValueExpression.java 3048 2007-07-28 18:02:42Z tmorgner $ 027 * ------------ 028 * (C) Copyright 2000-2005, by Object Refinery Limited. 029 * (C) Copyright 2005-2007, by Pentaho Corporation. 030 */ 031 032 package org.jfree.report.expressions.sys; 033 034 import org.jfree.report.DataSourceException; 035 import org.jfree.report.expressions.AbstractExpression; 036 037 /** 038 * Creation-Date: 02.12.2006, 22:07:57 039 * 040 * @author Thomas Morgner 041 */ 042 public class GetValueExpression extends AbstractExpression 043 { 044 private String field; 045 046 public GetValueExpression() 047 { 048 } 049 050 public GetValueExpression(final String field) 051 { 052 this.field = field; 053 } 054 055 public String getField() 056 { 057 return field; 058 } 059 060 public void setField(final String field) 061 { 062 this.field = field; 063 } 064 065 /** 066 * Return the current expression value. <P> The value depends (obviously) on 067 * the expression implementation. 068 * 069 * @return the value of the function. 070 */ 071 public Object computeValue() throws DataSourceException 072 { 073 return getDataRow().get(getField()); 074 } 075 }