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J2V8 is a set of Java bindings for V8

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/*******************************************************************************
 * Copyright (c) 2014 EclipseSource and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    EclipseSource - initial API and implementation
 ******************************************************************************/
package com.eclipsesource.v8;

/**
 * Classes that implement this interface provide a method
 * which can be invoked from JavaScript. The method can return
 * a result.
 *
 * After creating an instance of a class that implements this
 * interface it can be registered as a Callback on a V8Object.
 */
public interface JavaCallback {

    /**
     * Called when a JS Function invokes a the registered Java
     * method.
     *
     * @param receiver The V8Object that the function was called on.
     * @param parameters The parameters passed to the JS Function. The
     * parameter array does not need to be released, by any objects accessed
     * from the array must be.
     *
     * @return A result that should be passed back to JavaScript. The
     * result must be either an Integer, Double, Boolean, String or V8Value.
     */
    public Object invoke(V8Object receiver, V8Array parameters);

}