001 package org.granite.generator.as3.reflect;
002
003 import java.lang.annotation.Annotation;
004 import java.lang.reflect.Array;
005 import java.lang.reflect.Method;
006 import java.lang.reflect.Modifier;
007 import java.util.ArrayList;
008 import java.util.Arrays;
009 import java.util.List;
010 import java.util.Map;
011
012 public class ValidatableBean {
013
014 private final Class<?> type;
015 private final String metaAnnotationName;
016 private final List<String> specialAnnotationNames;
017 private final Map<String, String> nameConversions;
018
019 public ValidatableBean(Class<?> type, String metaAnnotationName, List<String> specialAnnotationNames, Map<String, String> nameConversions) {
020 this.type = type;
021 this.metaAnnotationName = metaAnnotationName;
022 this.specialAnnotationNames = specialAnnotationNames;
023 this.nameConversions = nameConversions;
024 }
025
026 public void buildConstraints(Map<String, JavaProperty> properties, Map<JavaProperty, List<JavaConstraint>> constraints) {
027 Class<? extends Annotation> metaAnnotationClass = loadMetaAnnotationClass(type, metaAnnotationName);
028 if (metaAnnotationClass == null)
029 return;
030
031 // Collect validation annotations
032 for (JavaProperty property : properties.values()) {
033 List<JavaConstraint> javaConstraints = new ArrayList<JavaConstraint>();
034
035 List<Annotation> constraintAnnotations = new ArrayList<Annotation>();
036 for (Annotation annotation : property.getDeclaredAnnotations()) {
037 Class<? extends Annotation> annotationClass = annotation.annotationType();
038
039 if (annotationClass.isAnnotationPresent(metaAnnotationClass) || specialAnnotationNames.contains(annotationClass.getName()))
040 constraintAnnotations.add(annotation);
041 else {
042
043 // (Spec 2.2) "...the bean validation provider treats regular annotations
044 // (annotations not annotated by @Constraint) whose value element has a
045 // return type of an array of constraint annotations in a special way.
046 // Each element in the value array are processed by the Bean Validation
047 // implementation as regular constraint annotations."
048
049 Method value = null;
050 try {
051 value = annotationClass.getMethod("value");
052 }
053 catch (NoSuchMethodException e) {
054 }
055
056 if (value != null && value.getReturnType().isArray() &&
057 value.getReturnType().getComponentType().isAnnotation() &&
058 value.getReturnType().getComponentType().isAnnotationPresent(metaAnnotationClass)) {
059
060 try {
061 Annotation[] annotationList = (Annotation[])value.invoke(annotation);
062 constraintAnnotations.addAll(Arrays.asList(annotationList));
063 }
064 catch (Exception e) {
065 // should never happen...
066 }
067 }
068 }
069 }
070
071 for (Annotation constraint : constraintAnnotations) {
072 List<String[]> attributes = new ArrayList<String[]>();
073
074 for (Method attribute : constraint.annotationType().getDeclaredMethods()) {
075 if (Modifier.isPublic(attribute.getModifiers()) &&
076 !Modifier.isStatic(attribute.getModifiers()) &&
077 attribute.getParameterTypes().length == 0) {
078
079 Object value = null;
080 try {
081 value = attribute.invoke(constraint);
082 }
083 catch (Exception e) {
084 continue;
085 }
086
087 if (value != null && (!value.getClass().isArray() || Array.getLength(value) > 0))
088 attributes.add(new String[]{attribute.getName(), escape(value), attribute.getReturnType().getName()});
089 }
090 }
091
092 String constraintName = constraint.annotationType().getName();
093 if (nameConversions.containsKey(constraintName))
094 constraintName = nameConversions.get(constraintName);
095 String packageName = constraintName.indexOf(".") > 0 ? constraintName.substring(0, constraintName.lastIndexOf(".")) : "";
096 constraintName = constraintName.indexOf(".") > 0 ? constraintName.substring(constraintName.lastIndexOf(".")+1) : constraintName;
097 if (nameConversions.containsKey(packageName))
098 packageName = nameConversions.get(packageName);
099
100 javaConstraints.add(new JavaConstraint(packageName, constraintName, attributes));
101 }
102
103 if (!javaConstraints.isEmpty())
104 constraints.put(property, javaConstraints);
105 }
106 }
107
108 @SuppressWarnings("unchecked")
109 private static Class<? extends Annotation> loadMetaAnnotationClass(Class<?> type, String metaAnnotationName) {
110 try {
111 return (Class<? extends Annotation>)type.getClassLoader().loadClass(metaAnnotationName);
112 }
113 catch (Exception e) {
114 return null;
115 }
116 }
117
118 private static String escape(Object value) {
119
120 if (value.getClass().isArray()) {
121 StringBuilder sb = new StringBuilder();
122
123 final int length = Array.getLength(value);
124 boolean first = true;
125 for (int i = 0; i < length; i++) {
126 Object item = Array.get(value, i);
127 if (item == null)
128 continue;
129
130 if (first)
131 first = false;
132 else
133 sb.append(", ");
134
135 sb.append(escape(item, true));
136 }
137
138 return sb.toString();
139 }
140
141 return escape(value, false);
142 }
143
144 private static String escape(Object value, boolean array) {
145 if (value instanceof Class<?>)
146 return ((Class<?>)value).getName();
147
148 if (value.getClass().isEnum())
149 return ((Enum<?>)value).name();
150
151 value = value.toString().replace("&", "&").replace("\"", """);
152 if (array)
153 value = ((String)value).replace(",", ",,");
154 return (String)value;
155 }
156 }