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package com.sun.jersey.core.provider;
/**
* A holder for an entity of a request consumed by the server or a response
* consumed by a client.
*
* Some clients/servers may send requests/responses with no entity or an
* entity (for example WebDAV clients). To support such request or responses
* The EntityHolder type may be used where the actual type
* of the entity is declared as a type parameter.
*
* For example a POST method that consumes a specific JAXB object,
* MyJAXBObject, can determine if the request contained the
* JAXB object or the request contained no entity, as follows:
*
* @POST
* @Consumes("text/plain")
* public void post(EntityHolder<MyJAXBObject> s) {
* if (s.hasEntity()) {
* MyJAXBObject entity = s.getEntity();
* } else {
* ...
* }
* }
*
*
*
* @author [email protected]
*/
public class EntityHolder {
private final T t;
/**
* Create an entity holder containing no entity.
*/
public EntityHolder() {
this.t = null;
}
/**
* Create an entity holder containing an entity.
*
* @param t the entity.
*/
public EntityHolder(T t) {
this.t = t;
}
/**
*
* @return true if there is an entity present, otherwise false.
*/
public boolean hasEntity() {
return t != null;
}
/**
* Get the entity.
* @return the entity if present, otherwise null if the entity is not
* present.
*/
public T getEntity() {
return t;
}
}