--- old/src/sample/nashorn/BufferArray.java 2020-04-15 18:52:41.000000000 +0530 +++ /dev/null 2020-04-15 18:52:41.000000000 +0530 @@ -1,120 +0,0 @@ -/* - * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * - Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * - Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * - Neither the name of Oracle nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS - * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, - * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -import java.nio.DoubleBuffer; -import jdk.nashorn.api.scripting.AbstractJSObject; - -/** - * Simple class demonstrating pluggable script object - * implementation. By implementing jdk.nashorn.api.scripting.JSObject - * (or extending AbstractJSObject which implements it), you - * can supply a friendly script object. Nashorn will call - * 'magic' methods on such a class on 'obj.foo, obj.foo = 33, - * obj.bar()' etc. from script. - * - * In this example, Java nio DoubleBuffer object is wrapped - * as a friendly script object that provides indexed acces - * to buffer content and also support array-like "length" - * readonly property to retrieve buffer's capacity. This class - * also demonstrates a function valued property called "buf". - * On 'buf' method, we return the underlying nio buffer object - * that is being wrapped. - */ -public class BufferArray extends AbstractJSObject { - // underlying nio buffer - private final DoubleBuffer buf; - - /** - * Constructor - * @param size initial size - */ - public BufferArray(final int size) { - buf = DoubleBuffer.allocate(size); - } - - /** - * Constructur - * @param buf {@link DoubleBuffer} to link to - */ - public BufferArray(final DoubleBuffer buf) { - this.buf = buf; - } - - // called to check if indexed property exists - @Override - public boolean hasSlot(final int index) { - return index > 0 && index < buf.capacity(); - } - - // get the value from that index - @Override - public Object getSlot(final int index) { - return buf.get(index); - } - - // set the value at that index - @Override - public void setSlot(final int index, final Object value) { - buf.put(index, ((Number)value).doubleValue()); - } - - // do you have a property of that given name? - @Override - public boolean hasMember(final String name) { - return "length".equals(name) || "buf".equals(name); - } - - // get the value of that named property - @Override - public Object getMember(final String name) { - switch (name) { - case "length": - return buf.capacity(); - case "buf": - // return a 'function' value for this property - return new AbstractJSObject() { - @Override - public Object call(final Object thiz, final Object... args) { - return BufferArray.this.buf; - } - - // yes, I'm a function ! - @Override - public boolean isFunction() { - return true; - } - }; - default: - break; - } - return null; - } -}