/*
* Copyright (c) 2010-2011 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 org.relaxng.datatype.DatatypeException;
public class CdoCdcPair extends AbstractDatatype {
private enum State {
DATA, LESS_THAN_SIGN, LESS_THAN_SIGN_BANG, LESS_THAN_SIGN_BANG_HYPHEN,
HAS_CDO, HAS_CDO_AND_HYPHEN, HAS_CDO_AND_DOUBLE_HYPHEN
}
/**
* The singleton instance.
*/
public static final CdoCdcPair THE_INSTANCE = new CdoCdcPair();
protected CdoCdcPair() {
super();
}
@Override public void checkValid(CharSequence literal)
throws DatatypeException {
State state = State.DATA;
for (int i = 0; i < literal.length(); i++) {
char c = literal.charAt(i);
switch (state) {
case DATA:
if ('<' == c) {
state = State.LESS_THAN_SIGN;
continue;
}
continue;
case LESS_THAN_SIGN:
if ('!' == c) {
state = State.LESS_THAN_SIGN_BANG;
continue;
}
state = State.DATA;
continue;
case LESS_THAN_SIGN_BANG:
if ('-' == c) {
state = State.LESS_THAN_SIGN_BANG_HYPHEN;
continue;
}
state = State.DATA;
continue;
case LESS_THAN_SIGN_BANG_HYPHEN:
if ('-' == c) {
state = State.HAS_CDO;
continue;
}
state = State.DATA;
continue;
case HAS_CDO:
if ('-' == c) {
state = State.HAS_CDO_AND_HYPHEN;
continue;
}
continue;
case HAS_CDO_AND_HYPHEN:
if ('-' == c) {
state = State.HAS_CDO_AND_DOUBLE_HYPHEN;
continue;
}
state = State.HAS_CDO;
continue;
case HAS_CDO_AND_DOUBLE_HYPHEN:
if ('>' == c) {
state = State.DATA;
continue;
} else if ('-' == c) {
continue;
}
state = State.HAS_CDO;
continue;
default:
assert false : state;
}
}
if (state == State.HAS_CDO) {
throw newDatatypeException("Content contains the character sequence \u201c<!--\u201d without"
+ " a later occurrence of the character sequence \u201c-->\u201d.");
}
}
@Override public String getName() {
return "text content with CDO-CDC pair";
}
}