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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 *
 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package com.sun.beans.decoder;

This class is intended to handle <char> element. This element specifies char values. The class Character is used as wrapper for these values. The result value is created from text of the body of this element. The body parsing is described in the class StringElementHandler. For example:
<char>X</char>
 which is equivalent to Character.valueOf('X') in Java code. 
The following attributes are supported:

code
this attribute specifies character code
id
the identifier of the variable that is intended to store the result
 The code attribute can be used for characters that are illegal in XML document, for example:
<char code="0"/>
Author:
Sergey A. Malenkov
Since:
1.7/**
 * This class is intended to handle &lt;char&gt; element.
 * This element specifies {@code char} values.
 * The class {@link Character} is used as wrapper for these values.
 * The result value is created from text of the body of this element.
 * The body parsing is described in the class {@link StringElementHandler}.
 * For example:<pre>
 * &lt;char&gt;X&lt;/char&gt;</pre>
 * which is equivalent to {@code Character.valueOf('X')} in Java code.
 * <p>The following attributes are supported:
 * <dl>
 * <dt>code
 * <dd>this attribute specifies character code
 * <dt>id
 * <dd>the identifier of the variable that is intended to store the result
 * </dl>
 * The {@code code} attribute can be used for characters
 * that are illegal in XML document, for example:<pre>
 * &lt;char code="0"/&gt;</pre>
 *
 * @since 1.7
 *
 * @author Sergey A. Malenkov
 */
final class CharElementHandler extends StringElementHandler {

    
Parses attributes of the element.
The following attributes are supported:

code
this attribute specifies character code
id
the identifier of the variable that is intended to store the result

Params:
name –   the attribute name
value –  the attribute value/**
     * Parses attributes of the element.
     * The following attributes are supported:
     * <dl>
     * <dt>code
     * <dd>this attribute specifies character code
     * <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("code")) { // NON-NLS: the attribute name
            int code = Integer.decode(value);
            for (char ch : Character.toChars(code)) {
                addCharacter(ch);
            }
        } else {
            super.addAttribute(name, value);
        }
    }

    
Creates char value from the text of the body of this element. 
Params:
argument –  the text of the body
Returns:
evaluated char value/**
     * Creates {@code char} value from
     * the text of the body of this element.
     *
     * @param argument  the text of the body
     * @return evaluated {@code char} value
     */
    @Override
    public Object getValue(String argument) {
        if (argument.length() != 1) {
            throw new IllegalArgumentException("Wrong characters count");
        }
        return Character.valueOf(argument.charAt(0));
    }
}