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package com.sun.faces.application.annotation;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.LinkedHashMap;
import java.util.Set;
import javax.faces.bean.*;
import javax.faces.context.FacesContext;
import com.sun.faces.application.ApplicationAssociate;
import com.sun.faces.mgbean.BeanManager;
import com.sun.faces.mgbean.ManagedBeanInfo;
/**
* <p>
* <code>ConfigAnnotationHandler</code> for {@link ManagedBean} annotated
* classes.
* </p>
*/
public class ManagedBeanConfigHandler implements ConfigAnnotationHandler {
private static final Class<?>[] SCOPES = {
RequestScoped.class,
ViewScoped.class,
SessionScoped.class,
ApplicationScoped.class,
NoneScoped.class,
CustomScoped.class
};
private static final Collection<Class<? extends Annotation>> HANDLES;
static {
Collection<Class<? extends Annotation>> handles =
new ArrayList<Class<? extends Annotation>>(2);
handles.add(ManagedBean.class);
HANDLES = Collections.unmodifiableCollection(handles);
}
private Map<Class<?>,Annotation> managedBeans;
// ------------------------------------ Methods from ConfigAnnotationHandler
/**
* @see com.sun.faces.application.annotation.ConfigAnnotationHandler#getHandledAnnotations()
*/
public Collection<Class<? extends Annotation>> getHandledAnnotations() {
return HANDLES;
}
/**
* @see com.sun.faces.application.annotation.ConfigAnnotationHandler#collect(Class, java.lang.annotation.Annotation)
*/
public void collect(Class<?> target, Annotation annotation) {
if (managedBeans == null) {
managedBeans = new HashMap<Class<?>,Annotation>();
}
managedBeans.put(target, annotation);
}
/**
* @see com.sun.faces.application.annotation.ConfigAnnotationHandler#push(javax.faces.context.FacesContext)
*/
public void push(FacesContext ctx) {
if (managedBeans != null) {
ApplicationAssociate associate =
ApplicationAssociate.getInstance(ctx.getExternalContext());
if (associate != null) {
BeanManager manager = associate.getBeanManager();
for (Map.Entry<Class<?>,Annotation> entry : managedBeans.entrySet()) {
process(manager, entry.getKey(), entry.getValue());
}
}
}
}
// --------------------------------------------------------- Private Methods
private void process(BeanManager manager,
Class<?> annotatedClass,
Annotation annotation) {
manager.register(getBeanInfo(annotatedClass,
(ManagedBean) annotation));
}
private ManagedBeanInfo getBeanInfo(Class<?> annotatedClass,
ManagedBean metadata) {
String name = getName(metadata, annotatedClass);
String scope = getScope(annotatedClass);
boolean eager = metadata.eager();
Map<String,Field> annotatedFields = new LinkedHashMap<String,Field>();
//Map<String, Method> annotatedMethods = new LinkedHashMap<String,Method>();
collectAnnotatedFields(annotatedClass, annotatedFields);
//collectAnnotatedMethods(annotatedClass,
// annotatedMethods,
// annotatedFields.keySet());
List<ManagedBeanInfo.ManagedProperty> properties = null;
if (!annotatedFields.isEmpty()) {
properties = new ArrayList<ManagedBeanInfo.ManagedProperty>(annotatedFields.size());
for (Map.Entry<String,Field> entry : annotatedFields.entrySet()) {
Field f = entry.getValue();
ManagedProperty property = f.getAnnotation(ManagedProperty.class);
ManagedBeanInfo.ManagedProperty propertyInfo =
new ManagedBeanInfo.ManagedProperty(entry.getKey(),
f.getType().getName(),
property.value(),
null,
null);
properties.add(propertyInfo);
}
}
/*
if (!annotatedMethods.isEmpty()) {
if (properties == null) {
properties = new ArrayList<ManagedBeanInfo.ManagedProperty>(annotatedMethods.size());
for (Map.Entry<String,Method> entry : annotatedMethods.entrySet()) {
Method m = entry.getValue();
ManagedProperty property = m.getAnnotation(ManagedProperty.class);
String alias = property.name();
if (alias != null && alias.length() == 0) {
alias = null;
}
ManagedBeanInfo.ManagedProperty propertyInfo =
new ManagedBeanInfo.ManagedProperty(alias,
entry.getKey(),
m.getParameterTypes()[0].getName(),
property.value(),
null,
null);
properties.add(propertyInfo);
}
}
}
*/
return new ManagedBeanInfo(name,
annotatedClass.getName(),
scope,
eager,
null,
null,
properties,
null);
}
private void collectAnnotatedMethods(Class<?> baseClass,
Map<String,Method> annotatedMethods,
Set<String> annotatedFields) {
Method[] methods = baseClass.getDeclaredMethods();
for (Method method : methods) {
ManagedProperty property = method.getAnnotation(ManagedProperty.class);
if (property != null) {
if (!method.getName().startsWith("set")
|| method.getParameterTypes().length != 1) {
continue;
}
StringBuilder sb =
new StringBuilder(method.getName().substring(3));
char c = sb.charAt(0);
sb.deleteCharAt(0);
sb.insert(0, Character.toLowerCase(c));
String propName = sb.toString();
if (!annotatedFields.contains(propName) && !annotatedMethods.containsKey(propName)) {
annotatedMethods.put(propName, method);
}
}
}
Class<?> superClass = baseClass.getSuperclass();
if (!Object.class.equals(superClass)) {
collectAnnotatedMethods(superClass, annotatedMethods, annotatedFields);
}
}
private void collectAnnotatedFields(Class<?> baseClass, Map<String,Field> annotatedFields) {
Field[] fields = baseClass.getDeclaredFields();
for (Field field : fields) {
ManagedProperty property = field.getAnnotation(ManagedProperty.class);
if (property != null) {
String propName = property.name();
if (propName == null || propName.length() == 0) {
propName = field.getName();
}
// if the field has already been collected, don't replace the existing
// value as that value represents an override.
if (!annotatedFields.containsKey(propName)) {
annotatedFields.put(propName, field);
}
}
}
Class<?> superClass = baseClass.getSuperclass();
if (!Object.class.equals(superClass)) {
collectAnnotatedFields(superClass, annotatedFields);
}
}
private String getScope(Class<?> annotatedClass) {
for (Class<?> scope : SCOPES) {
//noinspection unchecked
Annotation a = annotatedClass.getAnnotation((Class<? extends Annotation>) scope);
if (a != null) {
if (a instanceof RequestScoped) {
return "request";
} else if (a instanceof ViewScoped) {
return "view";
} if (a instanceof SessionScoped) {
return "session";
} else if (a instanceof ApplicationScoped) {
return "application";
} else if (a instanceof NoneScoped) {
return "none";
} else if (a instanceof CustomScoped) {
return ((CustomScoped) a).value();
}
}
}
return "request";
}
private String getName(ManagedBean managedBean, Class<?> annotatedClass) {
String name = managedBean.name();
if (name.length() == 0) {
String t = annotatedClass.getName();
name = t.substring(t.lastIndexOf('.') + 1);
char[] nameChars = name.toCharArray();
nameChars[0] = Character.toLowerCase(nameChars[0]);
name = new String(nameChars);
}
return name;
}
}