001: /*
002: * The Apache Software License, Version 1.1
003: *
004: *
005: * Copyright (c) 1999, 2000 The Apache Software Foundation. All rights
006: * reserved.
007: *
008: * Redistribution and use in source and binary forms, with or without
009: * modification, are permitted provided that the following conditions
010: * are met:
011: *
012: * 1. Redistributions of source code must retain the above copyright
013: * notice, this list of conditions and the following disclaimer.
014: *
015: * 2. Redistributions in binary form must reproduce the above copyright
016: * notice, this list of conditions and the following disclaimer in
017: * the documentation and/or other materials provided with the
018: * distribution.
019: *
020: * 3. The end-user documentation included with the redistribution,
021: * if any, must include the following acknowledgment:
022: * "This product includes software developed by the
023: * Apache Software Foundation (http://www.apache.org/)."
024: * Alternately, this acknowledgment may appear in the software itself,
025: * if and wherever such third-party acknowledgments normally appear.
026: *
027: * 4. The names "Xerces" and "Apache Software Foundation" must
028: * not be used to endorse or promote products derived from this
029: * software without prior written permission. For written
030: * permission, please contact apache@apache.org.
031: *
032: * 5. Products derived from this software may not be called "Apache",
033: * nor may "Apache" appear in their name, without prior written
034: * permission of the Apache Software Foundation.
035: *
036: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
037: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
038: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
039: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
040: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
041: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
042: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
043: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
044: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
045: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
046: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
047: * SUCH DAMAGE.
048: * ====================================================================
049: *
050: * This software consists of voluntary contributions made by many
051: * individuals on behalf of the Apache Software Foundation and was
052: * originally based on software copyright (c) 2001, International
053: * Business Machines, Inc., http://www.apache.org. For more
054: * information on the Apache Software Foundation, please see
055: * <http://www.apache.org/>.
056: */
057:
058: package org.apache.xerces.validators.datatype;
059:
060: import java.util.Hashtable;
061:
062: /**
063: * Validator for <gMonth> datatype (W3C Schema Datatypes)
064: *
065: * @author Elena Litani
066: * @version $Id: MonthDatatypeValidator.java,v 1.5 2001/06/21 20:56:06 elena Exp $
067: */
068:
069: public class MonthDatatypeValidator extends DateTimeValidator {
070:
071: public MonthDatatypeValidator()
072: throws InvalidDatatypeFacetException {
073: super ();
074: }
075:
076: public MonthDatatypeValidator(DatatypeValidator base,
077: Hashtable facets, boolean derivedByList)
078: throws InvalidDatatypeFacetException {
079: super (base, facets, derivedByList);
080: }
081:
082: /**
083: * Parses, validates and computes normalized version of gMonth object
084: *
085: * @param str The lexical representation of gMonth object --MM--
086: * with possible time zone Z or (-),(+)hh:mm
087: * @param date uninitialized date object
088: * @return normalized date representation
089: * @exception Exception Invalid lexical representation
090: */
091: protected int[] parse(String str, int[] date)
092: throws SchemaDateTimeException {
093:
094: resetBuffer(str);
095:
096: //create structure to hold an object
097: if (date == null) {
098: date = new int[TOTAL_SIZE];
099: }
100: resetDateObj(date);
101:
102: //set constants
103: date[CY] = YEAR;
104: date[D] = DAY;
105: if (fBuffer.charAt(0) != '-' || fBuffer.charAt(1) != '-') {
106: throw new SchemaDateTimeException(
107: "Invalid format for gMonth: " + str);
108: }
109: int stop = fStart + 4;
110: date[M] = parseInt(fStart + 2, stop);
111:
112: if (fBuffer.charAt(stop++) != '-'
113: || fBuffer.charAt(stop) != '-') {
114: throw new SchemaDateTimeException(
115: "Invalid format for gMonth: " + str);
116: }
117: if (MONTH_SIZE < fEnd) {
118: int sign = findUTCSign(MONTH_SIZE, fEnd);
119: if (sign < 0) {
120: throw new SchemaDateTimeException(
121: "Error in month parsing: " + str);
122: } else {
123: getTimeZone(date, sign);
124: }
125: }
126: //validate and normalize
127:
128: //REVISIT: do we need SchemaDateTimeException?
129: validateDateTime(date);
130:
131: if (date[utc] != 0 && date[utc] != 'Z') {
132: normalize(date);
133: }
134: return date;
135: }
136:
137: /**
138: * Overwrite compare algorithm to optimize month comparison
139: *
140: * @param date1
141: * @param date2
142: * @return
143: */
144: protected short compareDates(int[] date1, int[] date2) {
145:
146: if (date1[utc] == date2[utc]) {
147: return (date1[M] >= date2[M]) ? (date1[M] > date2[M]) ? LESS_THAN
148: : EQUAL
149: : GREATER_THAN;
150: }
151:
152: if (date1[utc] == 'Z' || date2[utc] == 'Z') {
153:
154: if (date1[M] == date2[M]) {
155: //--05--Z and --05--
156: return INDETERMINATE;
157: }
158: if ((date1[M] + 1 == date2[M] || date1[M] - 1 == date2[M])) {
159: //--05--Z and (--04-- or --05--)
160: //REVISIT: should this case be less than or equal?
161: // maxExclusive should fail but what about maxInclusive
162: //
163: return INDETERMINATE;
164: }
165: }
166:
167: if (date1[M] < date2[M]) {
168: return LESS_THAN;
169: } else {
170: return GREATER_THAN;
171: }
172:
173: }
174:
175: /**
176: * Converts month object representation to String
177: *
178: * @param date month object
179: * @return lexical representation of month: --MM-- with an optional time zone sign
180: */
181: protected String dateToString(int[] date) {
182:
183: message.setLength(0);
184: message.append('-');
185: message.append('-');
186: message.append(date[M]);
187: message.append('-');
188: message.append('-');
189: message.append((char) date[utc]);
190: return message.toString();
191: }
192:
193: }
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