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1: /** 2: * ======================================== 3: * JFreeReport : a free Java report library 4: * ======================================== 5: * 6: * Project Info: http://reporting.pentaho.org/ 7: * 8: * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors. 9: * 10: * This library is free software; you can redistribute it and/or modify it under the terms 11: * of the GNU Lesser General Public License as published by the Free Software Foundation; 12: * either version 2.1 of the License, or (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 15: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 16: * See the GNU Lesser General Public License for more details. 17: * 18: * You should have received a copy of the GNU Lesser General Public License along with this 19: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 20: * Boston, MA 02111-1307, USA. 21: * 22: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 23: * in the United States and other countries.] 24: * 25: * ------------ 26: * $Id: PrecomputedExpressionSlot.java 3525 2007-10-16 11:43:48Z tmorgner $ 27: * ------------ 28: * (C) Copyright 2000-2005, by Object Refinery Limited. 29: * (C) Copyright 2005-2007, by Pentaho Corporation. 30: */ 31: 32: package org.jfree.report.data; 33: 34: import org.jfree.report.DataRow; 35: import org.jfree.report.DataSourceException; 36: 37: /** 38: * Creation-Date: 25.11.2006, 15:18:58 39: * 40: * @author Thomas Morgner 41: */ 42: public class PrecomputedExpressionSlot implements ExpressionSlot 43: { 44: private String name; 45: private Object value; 46: private boolean preserve; 47: 48: public PrecomputedExpressionSlot(final String name, 49: final Object value, 50: final boolean preserve) 51: { 52: this.preserve = preserve; 53: this.name = name; 54: this.value = value; 55: } 56: 57: public Object getValue() throws DataSourceException 58: { 59: return value; 60: } 61: 62: public void advance() throws DataSourceException 63: { 64: // does nothing ... 65: } 66: 67: public void updateDataRow(final DataRow dataRow) 68: { 69: // does nothing ... 70: } 71: 72: public String getName() 73: { 74: return name; 75: } 76: 77: public boolean isDeepTraversing() 78: { 79: return false; 80: } 81: 82: /** 83: * Returns a clone of the object. 84: * 85: * @return A clone. 86: * @throws CloneNotSupportedException if cloning is not supported for some 87: * reason. 88: */ 89: public Object clone() throws CloneNotSupportedException 90: { 91: return super.clone(); 92: } 93: 94: public boolean isPreserve() 95: { 96: return preserve; 97: } 98: 99: }