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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package com.sun.beans.decoder;

This class is intended to handle <null> element. This element specifies null value. It should not contain body or inner elements. For example:
<null/>
 is equivalent to null in Java code. 
The following attribute is supported:

id
the identifier of the variable that is intended to store the result

Author:
Sergey A. Malenkov
Since:
1.7/**
 * This class is intended to handle &lt;null&gt; element.
 * This element specifies {@code null} value.
 * It should not contain body or inner elements.
 * For example:<pre>
 * &lt;null/&gt;</pre>
 * is equivalent to {@code null} in Java code.
 * <p>The following attribute is supported:
 * <dl>
 * <dt>id
 * <dd>the identifier of the variable that is intended to store the result
 * </dl>
 *
 * @since 1.7
 *
 * @author Sergey A. Malenkov
 */
class NullElementHandler extends ElementHandler implements ValueObject {

    
Returns the value of this element.
Returns:
the value of this element/**
     * Returns the value of this element.
     *
     * @return the value of this element
     */
    @Override
    protected final ValueObject getValueObject() {
        return this;
    }

    
Returns null as a value of <null> element. This method should be overridden in those handlers that extend behavior of this element. 
Returns:
null by default/**
     * Returns {@code null}
     * as a value of &lt;null&gt; element.
     * This method should be overridden in those handlers
     * that extend behavior of this element.
     *
     * @return {@code null} by default
     */
    public Object getValue() {
        return null;
    }

    
Returns void state of this value object. 
Returns:
false always/**
     * Returns {@code void} state of this value object.
     *
     * @return {@code false} always
     */
    public final boolean isVoid() {
        return false;
    }
}