001/* 002 * (C) Copyright 2006-2008 Nuxeo SAS (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but 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 * Contributors: 015 * bstefanescu 016 */ 017package org.nuxeo.ecm.webengine.forms.validation; 018 019import java.lang.reflect.InvocationHandler; 020import java.lang.reflect.InvocationTargetException; 021import java.lang.reflect.Method; 022import java.lang.reflect.Proxy; 023import java.util.ArrayList; 024import java.util.Collection; 025import java.util.HashMap; 026import java.util.Hashtable; 027import java.util.List; 028import java.util.Map; 029import java.util.Set; 030 031import org.nuxeo.ecm.webengine.WebEngine; 032import org.nuxeo.ecm.webengine.forms.FormDataProvider; 033import org.nuxeo.runtime.api.Framework; 034 035/** 036 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 037 */ 038public class FormManager implements InvocationHandler, Form { 039 040 protected Map<String, Object> map; 041 042 protected Map<String, String[]> fields; 043 044 protected List<String> unknownKeys; 045 046 protected FormDescriptor fd; 047 048 public FormManager(FormDescriptor fd) { 049 this.fd = fd; 050 unknownKeys = new ArrayList<String>(); 051 map = new HashMap<String, Object>(); // remove any previous data 052 fields = new HashMap<String, String[]>(); // remove any previous data 053 // TODO when implementing file upload - remove here any previously created file 054 } 055 056 public Collection<String> unknownKeys() { 057 return unknownKeys; 058 } 059 060 public Map<String, String[]> fields() { 061 return fields; 062 } 063 064 @SuppressWarnings("unchecked") 065 public void load(FormDataProvider data, Form proxy) throws ValidationException { 066 ValidationException ve = null; 067 Set<String> reqs = (Set<String>) fd.requiredFields.clone(); 068 for (String key : data.getKeys()) { 069 String[] values = data.getList(key); 070 if (values != null) { 071 int k = 0; 072 for (String v : values) { 073 if (v.length() == 0) { 074 k++; 075 } 076 } 077 if (k == values.length) { 078 values = null; 079 } 080 } 081 if (values != null) { 082 fields.put(key, values); 083 reqs.remove(key); 084 } 085 FormDescriptor.Field f = fd.fields.get(key); 086 if (f != null) { 087 Object o = null; 088 try { 089 if (f.isArray) { 090 if (values != null) { 091 o = f.validateArray(values); 092 } 093 } else { 094 String v = values != null && values.length > 0 ? values[0] : null; 095 if (v != null && v.length() > 0) { 096 097 o = f.validate(v); 098 } 099 } 100 } catch (ValidationException e) { 101 if (ve == null) { 102 ve = e; 103 } 104 ve.addInvalidField(key); 105 } 106 map.put(key, o); 107 } else { 108 unknownKeys.add(key); 109 } 110 } 111 if (!reqs.isEmpty()) { 112 if (ve == null) { 113 ve = new ValidationException(); 114 } 115 for (String req : reqs) { 116 ve.addRequiredField(req); 117 } 118 } 119 if (ve != null) { 120 throw ve; 121 } 122 if (fd.validator != null) { 123 fd.validator.validate(data, proxy); 124 } 125 } 126 127 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { 128 if (method.getDeclaringClass() == Form.class) { 129 try { 130 return method.invoke(this, args); 131 } catch (InvocationTargetException e) { 132 throw e.getCause(); 133 } 134 } else { 135 String name = method.getName(); 136 int len = name.length(); 137 if (len > 3) { 138 if (name.startsWith("get")) { 139 name = FormDescriptor.getFieldName(name, len); 140 return map.get(name); 141 } 142 } 143 } 144 throw new UnsupportedOperationException("Method unsupported: " + method); 145 } 146 147 protected static Map<Class<?>, FormDescriptor> forms = new Hashtable<Class<?>, FormDescriptor>(); 148 149 @SuppressWarnings("unchecked") 150 public static <T> T newProxy(Class<T> type) { 151 WebEngine we = Framework.getService(WebEngine.class); 152 ClassLoader cl = we != null ? we.getWebLoader().getClassLoader() : FormManager.class.getClassLoader(); 153 return (T) Proxy.newProxyInstance(cl, new Class<?>[] { type }, new FormManager(getDescriptor(type))); 154 } 155 156 public void flushCache() { 157 forms = new Hashtable<Class<?>, FormDescriptor>(); 158 } 159 160 static FormDescriptor getDescriptor(Class<?> type) { 161 FormDescriptor fd = forms.get(type); 162 if (fd == null) { 163 try { 164 fd = new FormDescriptor(type); 165 forms.put(type, fd); 166 } catch (ReflectiveOperationException e) { 167 throw new RuntimeException("Failed to build form descriptor", e); 168 } 169 } 170 return fd; 171 } 172 173}