com.google.gwt.requestfactory.shared
Interface RequestContext

All Known Subinterfaces:

LoggingRequest

public interface RequestContext

The base interface for RequestFactory service endpoints.

create

<T extends BaseProxy> T create(java.lang.Class<T> clazz)

Returns a new mutable proxy that this request can carry to the server, perhaps to be persisted. If the object is succesfully persisted, a PERSIST event will be posted including the EntityProxyId of this proxy.

Parameters:

clazz - a Class object of type T

Returns:

an BaseProxy instance of type T

edit

<T extends BaseProxy> T edit(T object)

Returns a mutable version of the proxy, whose mutations will accumulate in this context. Proxies reached via getters on this mutable proxy will also be mutable.

Parameters:

object - an instance of type T

Returns:

an EntityProxy or ValueProxy instance of type T

fire

void fire()

Send the accumulated changes and method invocations associated with the RequestContext.

If Request.to(Receiver) has not been called, this method will install a default receiver that will throw a RuntimeException if there is a server failure.

fire

void fire(Receiver<java.lang.Void> receiver)

For receiving errors or validation failures only.

Parameters:

receiver - a Receiver instance

Throws:

java.lang.IllegalArgumentException - if receiver is null

isChanged

boolean isChanged()

Returns true if any changes have been made to proxies mutable under this context. Note that vacuous changes — e.g. foo.setName(foo.getName() — will not trip the changed flag. Similarly, "unmaking" a change will clear the isChanged flag

 String name = bar.getName();
 bar.setName("something else");
 assertTrue(context.isChanged());
 bar.setName(name);
 assertFalse(context.isChanged());
 

Returns:

true if any changes have been made