001/** 002 * 003 * Copyright 2014 Anno van Vliet 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.jivesoftware.smackx.xdatavalidation.provider; 018 019import java.io.IOException; 020import java.util.logging.Logger; 021 022import org.jivesoftware.smack.util.ParserUtils; 023 024import org.jivesoftware.smackx.xdatavalidation.packet.ValidateElement; 025import org.jivesoftware.smackx.xdatavalidation.packet.ValidateElement.BasicValidateElement; 026import org.jivesoftware.smackx.xdatavalidation.packet.ValidateElement.ListRange; 027import org.jivesoftware.smackx.xdatavalidation.packet.ValidateElement.OpenValidateElement; 028import org.jivesoftware.smackx.xdatavalidation.packet.ValidateElement.RangeValidateElement; 029import org.jivesoftware.smackx.xdatavalidation.packet.ValidateElement.RegexValidateElement; 030 031import org.xmlpull.v1.XmlPullParser; 032import org.xmlpull.v1.XmlPullParserException; 033 034/** 035 * Extension Provider for Data validation of forms. 036 * 037 * @author Anno van Vliet 038 * 039 */ 040public class DataValidationProvider { 041 private static final Logger LOGGER = Logger.getLogger(DataValidationProvider.class.getName()); 042 043 public static ValidateElement parse(XmlPullParser parser) throws XmlPullParserException, IOException { 044 final int initialDepth = parser.getDepth(); 045 final String dataType = parser.getAttributeValue("", "datatype"); 046 ValidateElement dataValidation = null; 047 ListRange listRange = null; 048 049 outerloop: while (true) { 050 int eventType = parser.next(); 051 switch (eventType) { 052 case XmlPullParser.START_TAG: 053 switch (parser.getName()) { 054 case OpenValidateElement.METHOD: 055 dataValidation = new OpenValidateElement(dataType); 056 break; 057 case BasicValidateElement.METHOD: 058 dataValidation = new BasicValidateElement(dataType); 059 break; 060 case RangeValidateElement.METHOD: 061 dataValidation = new RangeValidateElement(dataType, 062 parser.getAttributeValue("", "min"), 063 parser.getAttributeValue("", "max") 064 ); 065 break; 066 case RegexValidateElement.METHOD: 067 dataValidation = new RegexValidateElement(dataType,parser.nextText()); 068 break; 069 case ListRange.ELEMENT: 070 Long min = ParserUtils.getLongAttribute(parser, "min"); 071 Long max = ParserUtils.getLongAttribute(parser, "max"); 072 if (min != null || max != null) { 073 listRange = new ListRange(min, max); 074 } else { 075 LOGGER.fine("Ignoring list-range element without min or max attribute"); 076 } 077 break; 078 default: 079 break; 080 } 081 break; 082 case XmlPullParser.END_TAG: 083 if (parser.getDepth() == initialDepth) { 084 if (dataValidation == null) { 085 // XEP-122 ยง 3.2 states that "If no validation method is specified, 086 // form processors MUST assume <basic/> validation." 087 dataValidation = new BasicValidateElement(dataType); 088 } 089 dataValidation.setListRange(listRange); 090 break outerloop; 091 } 092 break; 093 } 094 } 095 return dataValidation; 096 } 097 098}