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: IsExportTypeExpression.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 package org.jfree.report.expressions.sys; 032 033 import org.jfree.report.expressions.AbstractExpression; 034 import org.jfree.report.expressions.ExpressionException; 035 import org.jfree.report.flow.ReportContext; 036 037 038 /** 039 * Tests, whether a certain export type is currently used. 040 * 041 * @author Thomas Morgner 042 */ 043 public class IsExportTypeExpression extends AbstractExpression 044 { 045 private String exportType; 046 047 public IsExportTypeExpression() 048 { 049 } 050 051 public String getExportType() 052 { 053 return exportType; 054 } 055 056 public void setExportType(final String exportType) 057 { 058 this.exportType = exportType; 059 } 060 061 /** 062 * Return the current expression value. <P> The value depends (obviously) on 063 * the expression implementation. 064 * 065 * @return the value of the function. 066 */ 067 public Object computeValue() throws ExpressionException 068 { 069 if (exportType == null) 070 { 071 return Boolean.FALSE; 072 } 073 final ReportContext reportContext = getRuntime().getReportContext(); 074 if (reportContext.getExportDescriptor().startsWith(exportType)) 075 { 076 return Boolean.TRUE; 077 } 078 return Boolean.FALSE; 079 } 080 }