/*
* Copyright (c) 2008-2010 Mozilla Foundation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
package org.whattf.datatype;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import org.whattf.datatype.data.CharsetData;
import org.relaxng.datatype.DatatypeException;
public class Charset extends AbstractDatatype {
/**
* The singleton instance.
*/
public static final Charset THE_INSTANCE = new Charset();
public Charset() {
super();
}
@Override public void checkValid(CharSequence literal) throws DatatypeException {
if (literal.length() == 0) {
throw newDatatypeException("The empty string is not a valid character encoding name.");
}
for (int i = 0; i < literal.length(); i++) {
char c = literal.charAt(i);
// http://tools.ietf.org/html/rfc2978
if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z')
|| (c >= 'A' && c <= 'Z') || c == '-' || c == '!'
|| c == '#' || c == '$' || c == '%' || c == '&'
|| c == '\'' || c == '+' || c == '_' || c == '`'
|| c == '{' || c == '}' || c == '~' || c == '^')) {
throw newDatatypeException("Value contained ", c,
", which is not a valid character in an encoding name.");
}
}
String encodingName = literal.toString();
encodingName = toAsciiLowerCase(encodingName);
if ("replacement".equals(encodingName) || !CharsetData.isPreferred(encodingName)) {
String preferred = CharsetData.preferredForLabel(encodingName);
if (preferred == null || "replacement".equals(preferred)) {
throw newDatatypeException("\u201c" + encodingName
+ "\u201d is not a valid character encoding name.");
}
throw newDatatypeException("\u201c" + encodingName
+ "\u201d is not a preferred encoding name." + " The preferred label for this encoding is \u201C"
+ preferred + "\u201D.");
}
}
@Override public String getName() {
return "encoding name";
}
}