package org.jboss.resteasy.util;
import javax.ws.rs.CookieParam;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.MatrixParam;
import javax.ws.rs.PathParam;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Context;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;
/**
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
* @version $Revision: 1 $
*/
@SuppressWarnings("unchecked")
public final class FindAnnotation
{
/**
*
*/
private static final Class<? extends Annotation>[] JAXRS_ANNOTATIONS =
(Class<? extends Annotation>[]) new Class[]{
QueryParam.class,
HeaderParam.class,
CookieParam.class,
PathParam.class,
MatrixParam.class,
Context.class
};
private static final Class[] findJaxRSAnnotations_TYPE = new Class[]{};
private FindAnnotation()
{
}
/**
* FIXME Comment this
*
* @param <T>
* @param searchList
* @param annotation
* @return
*/
public static <T> T findAnnotation(Annotation[] searchList, Class<T> annotation)
{
if (searchList == null) return null;
for (Annotation ann : searchList)
{
if (ann.annotationType().equals(annotation))
{
return (T) ann;
}
}
return null;
}
/**
* FIXME Comment this
*
* @param <T>
* @param searchList
* @param annotation
* @return
*/
public static <T> T findAnnotation(Annotation[] searchList, String... annotations)
{
if (searchList == null || annotations == null || annotations.length == 0) return null;
for (Annotation ann : searchList)
{
for (String a : annotations)
{
if (ann.annotationType().getName().equals(a))
{
return (T) ann;
}
}
}
return null;
}
public static Class<? extends Annotation>[] findJaxRSAnnotations(Annotation[] searchList)
{
LinkedList<Class<? extends Annotation>> result = new LinkedList<Class<? extends Annotation>>();
for (Class<? extends Annotation> clazz : JAXRS_ANNOTATIONS)
{
if (findAnnotation(searchList, clazz) != null)
result.add(clazz);
}
return result.toArray(findJaxRSAnnotations_TYPE);
}
/**
* Returns an array of annotations the specified method of
* a resource class.
*
* @param method
* @return
*/
public static Annotation[] getResourcesAnnotations(Method method)
{
Map<Class<?>, Annotation> annotations = new HashMap<Class<?>, Annotation>();
for (Annotation annotation : method.getDeclaringClass().getAnnotations())
{
annotations.put(annotation.getClass(), annotation);
}
for (Annotation annotation : method.getAnnotations())
{
annotations.put(annotation.getClass(), annotation);
}
return annotations.values().toArray(new Annotation[annotations.size()]);
}
/**
* Look for an annotation in a list of annotations. If not there, see if it is on the type provided
*
* @param type
* @param annotations
* @param annnotation
* @return
*/
public static <T extends Annotation> T findAnnotation(Class<?> type, Annotation[] annotations, Class<T> annotation)
{
T config = FindAnnotation.findAnnotation(annotations, annotation);
if (config == null)
{
config = type.getAnnotation(annotation);
}
return config;
}
}