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	/*
	* Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/
	package com.sun.beans.decoder;

	import java.lang.reflect.Array;

	/**
	* This class is intended to handle <array> element,
	* that is used to array creation.
	* The {@code length} attribute specifies the length of the array.
	* The {@code class} attribute specifies the elements type.
	* The {@link Object} type is used by default.
	* For example:<pre>
	* <array length="10"/></pre>
	* is equivalent to {@code new Component[10]} in Java code.
	* The {@code set} and {@code get} methods,
	* as defined in the {@link java.util.List} interface,
	* can be used as if they could be applied to array instances.
	* The {@code index} attribute can thus be used with arrays.
	* For example:<pre>
	* <array length="3" class="java.lang.String">
	* <void index="1">
	* <string>Hello, world</string>
	* </void>
	* </array></pre>
	* is equivalent to the following Java code:<pre>
	* String[] s = new String[3];
	* s[1] = "Hello, world";</pre>
	* It is possible to omit the {@code length} attribute and
	* specify the values directly, without using {@code void} tags.
	* The length of the array is equal to the number of values specified.
	* For example:<pre>
	* <array id="array" class="int">
	* <int>123</int>
	* <int>456</int>
	* </array></pre>
	* is equivalent to {@code int[] array = {123, 456}} in Java code.
	* <p>The following attributes are supported:
	* <dl>
	* <dt>length
	* <dd>the array length
	* <dt>class
	* <dd>the type of object for instantiation
	* <dt>id
	* <dd>the identifier of the variable that is intended to store the result
	* </dl>
	*
	* @since 1.7
	*
	* @author Sergey A. Malenkov
	*/
	final class ArrayElementHandler extends NewElementHandler {
	private Integer length;

	/**
	* Parses attributes of the element.
	* The following attributes are supported:
	* <dl>
	* <dt>length
	* <dd>the array length
	* <dt>class
	* <dd>the type of object for instantiation
	* <dt>id
	* <dd>the identifier of the variable that is intended to store the result
	* </dl>
	*
	* @param name the attribute name
	* @param value the attribute value
	*/
	@Override
	public void addAttribute(String name, String value) {
	if (name.equals("length")) { // NON-NLS: the attribute name
	this.length = Integer.valueOf(value);
	} else {
	super.addAttribute(name, value);
	}
	}

	/**
	* Calculates the value of this element
	* if the lentgh attribute is set.
	*/
	@Override
	public void startElement() {
	if (this.length != null) {
	getValueObject();
	}
	}

	/**
	* Tests whether the value of this element can be used
	* as an argument of the element that contained in this one.
	*
	* @return {@code true} if the value of this element can be used
	* as an argument of the element that contained in this one,
	* {@code false} otherwise
	*/
	@Override
	protected boolean isArgument() {
	return true; // hack for compatibility
	}


	/**
	* Creates an instance of the array.
	*
	* @param type the base class
	* @param args the array of arguments
	* @return the value of this element
	*/
	@Override
	protected ValueObject getValueObject(Class<?> type, Object[] args) {
	if (type == null) {
	type = Object.class;
	}
	if (this.length != null) {
	return ValueObjectImpl.create(Array.newInstance(type, this.length));
	}
	Object array = Array.newInstance(type, args.length);
	for (int i = 0; i < args.length; i++) {
	Array.set(array, i, args[i]);
	}
	return ValueObjectImpl.create(array);
	}
	}

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