nl.nn.xmldecoder.CharElementHandler Maven / Gradle / Ivy
/*
* Copyright (c) 2008, 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
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*/
package nl.nn.xmldecoder;
/**
* This class is intended to handle <char> 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:
* <char>X</char>
* which is equivalent to {@code Character.valueOf('X')} in Java code.
* The following atributes are supported:
*
* - code
*
- this attribute specifies character code
*
- id
*
- the identifier of the variable that is intended to store the result
*
* The {@code code} attribute can be used for characters
* that are illegal in XML document, for example:
* <char code="0"/>
*
* @since 1.7
*
* @author Sergey A. Malenkov
*/
final class CharElementHandler extends StringElementHandler {
/**
* Parses attributes of the element.
* The following atributes are supported:
*
* - code
*
- this attribute specifies character code
*
- id
*
- the identifier of the variable that is intended to store the result
*
*
* @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 {@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));
}
}