001 /* 002 Copyright (C) 2003 Laurent Martelli <laurent@aopsys.com> 003 004 This program is free software; you can redistribute it and/or modify 005 it under the terms of the GNU Lesser General Public License as 006 published by the Free Software Foundation; either version 2 of the 007 License, or (at your option) any later version. 008 009 This program is distributed in the hope that it will be useful, but 010 WITHOUT ANY WARRANTY; without even the implied warranty of 011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 Lesser General Public License for more details. 013 014 You should have received a copy of the GNU Lesser General Public 015 License along with this program; if not, write to the Free Software 016 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 017 USA */ 018 019 package org.objectweb.jac.aspects.gui.reports; 020 021 import dori.jasper.engine.JRDataSource; 022 import dori.jasper.engine.JRException; 023 import dori.jasper.engine.JRField; 024 import java.util.Collection; 025 import java.util.Iterator; 026 import org.objectweb.jac.aspects.gui.GuiAC; 027 import org.objectweb.jac.core.ObjectRepository; 028 import org.objectweb.jac.core.rtti.ClassItem; 029 import org.objectweb.jac.core.rtti.ClassRepository; 030 import org.objectweb.jac.core.rtti.CollectionItem; 031 032 /** 033 * A data source for JasperReports. 034 */ 035 public class JacDataSource implements JRDataSource { 036 ClassItem componentType; 037 Collection collection; 038 039 Iterator it; 040 Object current; 041 042 /** 043 * Create a data source of all instances of a class. 044 */ 045 public JacDataSource(ClassItem cl) { 046 this.componentType = cl; 047 this.collection = ObjectRepository.getObjects(cl); 048 } 049 050 /** 051 * Creates a data source for a collection. 052 * 053 * @param collection a collection to fetch data from 054 * @param componentType the type of the elements in the collection. It can be null. 055 */ 056 public JacDataSource(Collection collection, ClassItem componentType) { 057 this.collection = collection; 058 this.componentType = componentType; 059 } 060 061 /** 062 * Creates a data source for a collection of an object 063 * 064 * @param collection a collection to fetch data from 065 * @param substance 066 */ 067 public JacDataSource(Object substance, CollectionItem collection) { 068 this.collection = collection.getActualCollectionThroughAccessor(substance); 069 this.componentType = collection.getComponentType(); 070 } 071 072 073 /** 074 * Creates a data source for a collection of an object 075 * 076 * @param collection a collection to fetch data from 077 * @param substance 078 */ 079 public JacDataSource(Object substance, String collectionName) { 080 this(substance,ClassRepository.get().getClass(substance).getCollection(collectionName)); 081 } 082 // implementation of dori.jasper.engine.JRDataSource interface 083 084 public boolean next() throws JRException 085 { 086 if (it==null) { 087 it = collection.iterator(); 088 } 089 boolean result = it.hasNext(); 090 if (result) 091 current = it.next(); 092 return result; 093 } 094 095 /** 096 * Uses the documentation of the field as the full name of the 097 * field, since the field's name can not contain dots. 098 */ 099 public Object getFieldValue(JRField field) throws JRException 100 { 101 if (current==null) { 102 throw new JRException( 103 "JacDataSource: No current object to get field "+ 104 field.getName()); 105 } 106 String name = field.getDescription(); 107 Object value = null; 108 if (componentType!=null) { 109 value = componentType.getField(name).getThroughAccessor(current); 110 } else { 111 ClassItem cl = ClassRepository.get().getClass(current); 112 value = cl.getField(name).getThroughAccessor(current); 113 } 114 115 if (field.getValueClass()==String.class && 116 value!=null && 117 value.getClass()!=String.class) { 118 value = GuiAC.toString(value); 119 } 120 return value; 121 } 122 123 }