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.web; 020 021 import org.objectweb.jac.core.rtti.CollectionItem; 022 import org.objectweb.jac.core.rtti.FieldItem; 023 import org.objectweb.jac.core.rtti.MethodItem; 024 import org.objectweb.jac.core.rtti.RttiAC; 025 import org.objectweb.jac.util.Strings; 026 import java.io.PrintWriter; 027 028 /** 029 * A reference editor that uses the value of an index field to select 030 * objects. 031 */ 032 public class IndexSelector extends AbstractFieldEditor 033 implements HTMLEditor 034 { 035 CollectionItem index; 036 FieldItem indexedField; 037 Object repository; 038 String key; 039 MethodItem indexNotFoundHandler; 040 041 public IndexSelector(Object substance, FieldItem field, 042 CollectionItem index, Object repository, 043 boolean allowCreation, 044 MethodItem indexNotFoundHandler) { 045 super(substance,field); 046 this.index = index; 047 this.repository = repository; 048 indexedField = (FieldItem)index.getAttribute(RttiAC.INDEXED_FIELD); 049 this.indexNotFoundHandler = indexNotFoundHandler; 050 updateKey(); 051 } 052 053 public void setValue(Object value) { 054 super.setValue(value); 055 updateKey(); 056 } 057 058 protected void updateKey() { 059 if (indexedField!=null && value!=null) { 060 key = indexedField.getThroughAccessor(value).toString(); 061 } 062 } 063 064 // HTMLEditor interface 065 066 public void genHTML(PrintWriter out) { 067 out.print("<input type=\"text\" name=\""+label+ 068 "\" size=\"12\" style=\"width:12ex\""+ 069 " value=\""+(key!=null?key:"")+"\""); 070 printAttributes(out); 071 out.println(">"); 072 } 073 074 protected boolean doReadValue(Object parameter) { 075 key = (String)parameter; 076 if (Strings.isEmpty(key)) { 077 setValue(null); 078 } else { 079 Object value = index.getMap(repository,key); 080 if (value!=null) { 081 setValue(value); 082 } else { 083 if (indexNotFoundHandler!=null && field!=null) { 084 value = indexNotFoundHandler.invokeStatic( 085 new Object[] {field.getTypeItem(),key}); 086 } 087 setValue(value); 088 } 089 090 } 091 return true; 092 } 093 094 095 } 096