001 /*
002 GRANITE DATA SERVICES
003 Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004
005 This file is part of Granite Data Services.
006
007 Granite Data Services is free software; you can redistribute it and/or modify
008 it under the terms of the GNU Library General Public License as published by
009 the Free Software Foundation; either version 2 of the License, or (at your
010 option) any later version.
011
012 Granite Data Services is distributed in the hope that it will be useful, but
013 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015 for more details.
016
017 You should have received a copy of the GNU Library General Public License
018 along with this library; if not, see <http://www.gnu.org/licenses/>.
019 */
020
021 package org.granite.generator.as3.reflect;
022
023 import java.lang.annotation.Annotation;
024 import java.lang.reflect.Array;
025 import java.lang.reflect.Method;
026 import java.lang.reflect.Modifier;
027 import java.net.URL;
028 import java.util.ArrayList;
029 import java.util.Arrays;
030 import java.util.HashMap;
031 import java.util.List;
032 import java.util.Map;
033
034 /**
035 * Entity reflection for converting validation annotations to Flex.
036 *
037 * @author William DRAI
038 * @author Franck WOLFF
039 */
040 public class JavaValidatableEntityBean extends JavaEntityBean {
041
042 private Map<JavaProperty, List<JavaConstraint>> constraints = new HashMap<JavaProperty, List<JavaConstraint>>();
043
044 public JavaValidatableEntityBean(JavaTypeFactory provider, Class<?> type, URL url, String metaAnnotationName, List<String> specialAnnotationNames, Map<String, String> nameConversions) {
045 super(provider, type, url);
046
047 Class<? extends Annotation> metaAnnotationClass = loadMetaAnnotationClass(type, metaAnnotationName);
048 if (metaAnnotationClass == null)
049 return;
050
051 // Collect validation annotations
052 for (JavaProperty property : properties.values()) {
053 List<JavaConstraint> javaConstraints = new ArrayList<JavaConstraint>();
054
055 List<Annotation> constraintAnnotations = new ArrayList<Annotation>();
056 for (Annotation annotation : property.getDeclaredAnnotations()) {
057 Class<? extends Annotation> annotationClass = annotation.annotationType();
058
059 if (annotationClass.isAnnotationPresent(metaAnnotationClass) || specialAnnotationNames.contains(annotationClass.getName()))
060 constraintAnnotations.add(annotation);
061 else {
062
063 // (Spec 2.2) "...the bean validation provider treats regular annotations
064 // (annotations not annotated by @Constraint) whose value element has a
065 // return type of an array of constraint annotations in a special way.
066 // Each element in the value array are processed by the Bean Validation
067 // implementation as regular constraint annotations."
068
069 Method value = null;
070 try {
071 value = annotationClass.getMethod("value");
072 }
073 catch (NoSuchMethodException e) {
074 }
075
076 if (value != null && value.getReturnType().isArray() &&
077 value.getReturnType().getComponentType().isAnnotation() &&
078 value.getReturnType().getComponentType().isAnnotationPresent(metaAnnotationClass)) {
079
080 try {
081 Annotation[] annotationList = (Annotation[])value.invoke(annotation);
082 constraintAnnotations.addAll(Arrays.asList(annotationList));
083 }
084 catch (Exception e) {
085 // should never happen...
086 }
087 }
088 }
089 }
090
091 for (Annotation constraint : constraintAnnotations) {
092 List<String[]> attributes = new ArrayList<String[]>();
093
094 for (Method attribute : constraint.annotationType().getDeclaredMethods()) {
095 if (Modifier.isPublic(attribute.getModifiers()) &&
096 !Modifier.isStatic(attribute.getModifiers()) &&
097 attribute.getParameterTypes().length == 0) {
098
099 Object value = null;
100 try {
101 value = attribute.invoke(constraint);
102 }
103 catch (Exception e) {
104 continue;
105 }
106
107 if (value != null && (!value.getClass().isArray() || Array.getLength(value) > 0))
108 attributes.add(new String[]{attribute.getName(), escape(value)});
109 }
110 }
111
112 String constraintName = constraint.annotationType().getSimpleName();
113 if (nameConversions.containsKey(constraintName))
114 constraintName = nameConversions.get(constraintName);
115 javaConstraints.add(new JavaConstraint(constraintName, attributes));
116 }
117
118 if (!javaConstraints.isEmpty())
119 constraints.put(property, javaConstraints);
120 }
121 }
122
123 public Map<JavaProperty, List<JavaConstraint>> getConstraints() {
124 return constraints;
125 }
126
127 @SuppressWarnings("unchecked")
128 private static Class<? extends Annotation> loadMetaAnnotationClass(Class<?> type, String metaAnnotationName) {
129 try {
130 return (Class<? extends Annotation>)type.getClassLoader().loadClass(metaAnnotationName);
131 }
132 catch (Exception e) {
133 return null;
134 }
135 }
136
137 private static String escape(Object value) {
138
139 if (value.getClass().isArray()) {
140 StringBuilder sb = new StringBuilder();
141
142 final int length = Array.getLength(value);
143 boolean first = true;
144 for (int i = 0; i < length; i++) {
145 Object item = Array.get(value, i);
146 if (item == null)
147 continue;
148
149 if (first)
150 first = false;
151 else
152 sb.append(", ");
153
154 sb.append(escape(item, true));
155 }
156
157 return sb.toString();
158 }
159
160 return escape(value, false);
161 }
162
163 private static String escape(Object value, boolean array) {
164 if (value instanceof Class<?>)
165 return ((Class<?>)value).getName();
166
167 if (value.getClass().isEnum())
168 return ((Enum<?>)value).name();
169
170 value = value.toString().replace("&", "&").replace("\"", """).replace("\\", "\\\\");
171 if (array)
172 value = ((String)value).replace(",", ",,");
173 return (String)value;
174 }
175 }