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-/*
- * 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;
- }
-}