ExtendedJavaArray.java

/*
 * Scriptographer
 *
 * This file is part of Scriptographer, a Scripting Plugin for Adobe Illustrator
 * http://scriptographer.org/
 *
 * Copyright (c) 2002-2010, Juerg Lehni
 * http://scratchdisk.com/
 *
 * All rights reserved. See LICENSE file for details.
 * 
 * File created on Mar 30, 2007.
 */

package com.scratchdisk.script.rhino;

import java.lang.reflect.Array;
import java.util.HashMap;

import org.mozilla.javascript.NativeJavaArray;
import org.mozilla.javascript.ScriptRuntime;
import org.mozilla.javascript.Scriptable;

/**
 * @author lehni
 *
 */
public class ExtendedJavaArray extends NativeJavaArray {
	HashMap<String, Object> properties;

	public ExtendedJavaArray(Scriptable scope, Object array, Class staticType, boolean unsealed) {
		super(scope, array);
		properties = unsealed ? new HashMap<String, Object>() : null;
	}

	public Object get(String name, Scriptable start) {
		Object result;
		if (super.has(name, start)) {
			result = super.get(name, start);
		} else if (properties != null && properties.containsKey(name)) {
			// see whether this object defines the property.
			result = properties.get(name);
		} else {
			Scriptable prototype = getPrototype();
			if (name.equals("prototype")) {
				result = prototype;
			} else if (prototype != null) {
				// if not, see whether the prototype maybe defines it.
				// NativeJavaObject misses to do so:
				result = prototype.get(name, start);
			} else {
				result = Scriptable.NOT_FOUND;
			}
		}
		return result;
	}

	public void put(String name, Scriptable start, Object value) {
		if (super.has(name, start)) {
			super.put(name, start, value);
		} else if (name.equals("prototype")) {
			if (value instanceof Scriptable)
				this.setPrototype((Scriptable) value);
		} else if (properties != null) {
			properties.put(name, value);
		}
	}

	public boolean has(String name, Scriptable start) {
		boolean has = super.has(name, start);
		if (!has && properties != null)
			has = properties.get(name) != null;
		return has;
	}

	public void delete(String name) {
		if (properties != null)
			properties.remove(name);
	}

	public Object getDefaultValue(Class hint) {
		if (hint == null || hint == ScriptRuntime.StringClass) {
			StringBuffer buffer = new StringBuffer();
			Object array = unwrap();
			int length = Array.getLength(array);
			for (int i = 0; i < length; i++) {
				if (i > 0)
					buffer.append(", ");
				buffer.append(Array.get(array, i));
			}
			return buffer.toString();
		} else {
			return super.getDefaultValue(hint);
		}
	}
}