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: ReportFormulaContext.java,v 1.5 2007/04/01 18:49:25 taqua Exp $
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;
033
034 import org.jfree.formula.ContextEvaluationException;
035 import org.jfree.formula.FormulaContext;
036 import org.jfree.formula.LibFormulaErrorValue;
037 import org.jfree.formula.LocalizationContext;
038 import org.jfree.formula.function.FunctionRegistry;
039 import org.jfree.formula.operators.OperatorFactory;
040 import org.jfree.formula.typing.Type;
041 import org.jfree.formula.typing.TypeRegistry;
042 import org.jfree.formula.typing.coretypes.AnyType;
043 import org.jfree.report.DataFlags;
044 import org.jfree.report.DataRow;
045 import org.jfree.report.DataSourceException;
046 import org.jfree.util.Configuration;
047 import org.jfree.util.Log;
048
049 /**
050 * Creation-Date: 29.11.2006, 17:54:33
051 *
052 * @author Thomas Morgner
053 */
054 public class ReportFormulaContext implements FormulaContext
055 {
056 private FormulaContext backend;
057 private DataRow dataRow;
058 private Object declaringElement;
059
060 public ReportFormulaContext(FormulaContext backend,
061 DataRow dataRow)
062 {
063 this.backend = backend;
064 this.dataRow = dataRow;
065 }
066
067 public LocalizationContext getLocalizationContext()
068 {
069 return backend.getLocalizationContext();
070 }
071
072 public Configuration getConfiguration()
073 {
074 return backend.getConfiguration();
075 }
076
077 public FunctionRegistry getFunctionRegistry()
078 {
079 return backend.getFunctionRegistry();
080 }
081
082 public TypeRegistry getTypeRegistry()
083 {
084 return backend.getTypeRegistry();
085 }
086
087 public OperatorFactory getOperatorFactory()
088 {
089 return backend.getOperatorFactory();
090 }
091
092 public boolean isReferenceDirty(Object name) throws ContextEvaluationException
093 {
094 try
095 {
096 final DataFlags flags = dataRow.getFlags(String.valueOf(name));
097 return flags.isChanged();
098 }
099 catch(Exception e)
100 {
101 throw new ContextEvaluationException
102 (new LibFormulaErrorValue(LibFormulaErrorValue.ERROR_REFERENCE_NOT_RESOLVABLE));
103 }
104 }
105
106 public Type resolveReferenceType(Object name)
107 {
108 return AnyType.TYPE;
109 }
110
111 public Object resolveReference(Object name) throws ContextEvaluationException
112 {
113 if (name == null)
114 {
115 throw new NullPointerException();
116 }
117 try
118 {
119 return dataRow.get(String.valueOf(name));
120 }
121 catch (DataSourceException e)
122 {
123 Log.debug ("Error while resolving formula reference: ", e);
124 throw new ContextEvaluationException(new LibFormulaErrorValue
125 (LibFormulaErrorValue.ERROR_REFERENCE_NOT_RESOLVABLE));
126 }
127 }
128
129 public DataRow getDataRow()
130 {
131 return dataRow;
132 }
133
134 public void setDataRow(final DataRow dataRow)
135 {
136 this.dataRow = dataRow;
137 }
138
139 public Object getDeclaringElement()
140 {
141 return declaringElement;
142 }
143
144 public void setDeclaringElement(final Object declaringElement)
145 {
146 this.declaringElement = declaringElement;
147 }
148 }