001    /*
002     * Copyright (c) 2006 Henri Sivonen
003     *
004     * Permission is hereby granted, free of charge, to any person obtaining a 
005     * copy of this software and associated documentation files (the "Software"), 
006     * to deal in the Software without restriction, including without limitation 
007     * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
008     * and/or sell copies of the Software, and to permit persons to whom the 
009     * Software is furnished to do so, subject to the following conditions:
010     *
011     * The above copyright notice and this permission notice shall be included in 
012     * all copies or substantial portions of the Software.
013     *
014     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
015     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
016     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
017     * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
018     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
019     * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
020     * DEALINGS IN THE SOFTWARE.
021     */
022    
023    package org.whattf.datatype;
024    
025    import org.relaxng.datatype.Datatype;
026    import org.relaxng.datatype.DatatypeException;
027    
028    /**
029     * This datatype shall accept any string that consists of one or more characters and 
030     * contains at least one character that is not a whitespace character.
031     * <p>The ID-type of this datatype is IDREFS.
032     * @version $Id: Idrefs.java 121 2006-11-18 11:51:44Z hsivonen $
033     * @author hsivonen
034     */
035    public final class Idrefs extends AbstractDatatype {
036    
037        /**
038         * The singleton instance.
039         */
040        public static final Idrefs THE_INSTANCE = new Idrefs();
041        
042        /**
043         * Package-private constructor
044         */
045        private Idrefs() {
046            super();
047        }
048    
049        /**
050         * Checks that the value is a proper list of HTML5 ids.
051         * @param literal the value
052         * @param context ignored
053         * @throws DatatypeException if the value isn't valid
054         * @see org.relaxng.datatype.Datatype#checkValid(java.lang.String, org.relaxng.datatype.ValidationContext)
055         */
056        public void checkValid(CharSequence literal) throws DatatypeException {
057            for (int i = 0; i < literal.length(); i++) {
058                char c = literal.charAt(i);
059                if (!isWhitespace(c)) {
060                    return;
061                }
062            }
063            throw new DatatypeException("An IDREFS value must contain at least one non-whitespace character.");
064        }   
065        
066        /**
067         * Returns <code>Datatype.ID_TYPE_IDREFS</code>.
068         * @return <code>Datatype.ID_TYPE_IDREFS</code>
069         * @see org.relaxng.datatype.Datatype#getIdType()
070         */
071        public int getIdType() {
072            return Datatype.ID_TYPE_IDREFS;
073        }
074    }