com.tinkerpop.frames.modules.javahandler.JavaMethodHandler Maven / Gradle / Ivy

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Frames is a framework for exposing the elements of a Blueprints graph as Java objects. Instead of writing software in terms of vertices and edges, with Frames, software is written in terms of domain objects and their relationships to each other.

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package com.tinkerpop.frames.modules.javahandler;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import com.tinkerpop.blueprints.Element;
import com.tinkerpop.frames.FramedGraph;
import com.tinkerpop.frames.util.ExceptionUtils;

class JavaMethodHandler implements
		com.tinkerpop.frames.modules.MethodHandler {

	private JavaHandlerModule module;

	JavaMethodHandler(JavaHandlerModule module) {
		this.module = module;
	}

	@Override
	public Class getAnnotationType() {
		return JavaHandler.class;
	}



	@Override
	public Object processElement(Object framedElement, Method method,
			Object[] arguments, JavaHandler annotation,
			FramedGraph framedGraph, Element element) {
		try {
			Object handler = module.createHandler(framedElement, framedGraph, element, method.getDeclaringClass(), method);
			return method.invoke(handler, arguments);
		} catch (IllegalArgumentException e) {
			throw new JavaHandlerException("Problem calling Java handler", e);
		} catch (IllegalAccessException e) {
			throw new JavaHandlerException("Problem calling Java handler", e);
		} catch (InvocationTargetException e) {
			ExceptionUtils.sneakyThrow(e.getTargetException());
			return null;
		}
	}

}