Helper ProxyState

Jan Burse, created Jun 19. 2019
package jekpro.tools.proxy;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
/**
* <p>Per instance invocation handler.</p>
* <p/>
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
* <p/>
* Rights & License
* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
* <p/>
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
* <p/>
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
* <p/>
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
*/
public final class ProxyState implements InvocationHandler {
private final ProxyHandler handler;
private final Object[] template;
/**
* <p>Create a data by a handler.</p>
*
* @param h The handler.
* @param size The size.
*/
ProxyState(ProxyHandler h, int size) {
handler = h;
template = new Object[size];
}
/**
* <p>Retrieve the handler.</p>
*
* @return The handler.
*/
public ProxyHandler getHandler() {
return handler;
}
/**
* <p>Retrieve the template skeleton.</p>
*
* @param idx The index.
* @return The template skeleton.
*/
Object at(int idx) {
return template[idx];
}
/**
* <p>Set the template skeleton.</p>
*
* @param idx The index.
* @param data The template skeleton.
*/
void set_at(int idx, Object data) {
template[idx] = data;
}
/**
* <p>Retrieve the length.</p>
*
* @return The length.
*/
int length() {
return template.length;
}
/**
* <p>Invoke by executing a Prolog term.</p>
*
* @param proxy The proxy object.
* @param method The method.
* @param args The arguments.
* @return The return value.
*/
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
return handler.invoke(proxy, method, args);
}
}

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