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Java > Open Source Codes > org > apache > fulcrum > intake > model > DateStringField


1 package org.apache.fulcrum.intake.model;
2
3 /* ====================================================================
4  * The Apache Software License, Version 1.1
5  *
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7  * reserved.
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10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
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17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
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21  * 3. The end-user documentation included with the redistribution,
22  * if any, must include the following acknowledgment:
23  * "This product includes software developed by the
24  * Apache Software Foundation (http://www.apache.org/)."
25  * Alternately, this acknowledgment may appear in the software itself,
26  * if and wherever such third-party acknowledgments normally appear.
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37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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53  * information on the Apache Software Foundation, please see
54  * <http://www.apache.org/>.
55  */
56
57 import java.text.DateFormat JavaDoc;
58 import java.text.ParseException JavaDoc;
59 import java.util.Date JavaDoc;
60
61 import org.apache.fulcrum.intake.validator.DateStringValidator;
62 import org.apache.fulcrum.intake.xmlmodel.XmlField;
63
64 /**
65  * Field for date inputs as free form text. The parsing of date strings
66  * is dependent on any rules that are defined, so this field will expect that
67  * any validator will be (or extend) DateStringValidator.
68  *
69  * @author <a HREF="mailto:jmcnally@collab.net">John McNally</a>
70  * @author <a HREF="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
71  * @version $Id: DateStringField.java,v 1.1 2004/11/12 10:25:38 epugh Exp $
72  */
73 public class DateStringField
74     extends Field
75 {
76     private DateFormat JavaDoc df = null;
77
78     public DateStringField(XmlField field, Group group)
79         throws Exception JavaDoc
80     {
81         super(field, group);
82         
83         if ( validator == null || !(validator instanceof DateStringValidator))
84         {
85             df = DateFormat.getInstance();
86             df.setLenient(true);
87         }
88     }
89
90     /**
91      * Sets the default value for a DateString field
92      *
93      * @param prop Parameter for the default values
94      */
95     protected void setDefaultValue(String JavaDoc prop)
96     {
97         defaultValue = prop;
98     }
99
100     /**
101      * A suitable validator.
102      *
103      * @return "DateStringValidator"
104      */
105     protected String JavaDoc getDefaultValidator()
106     {
107         return "org.apache.fulcrum.intake.validator.DateStringValidator";
108     }
109
110     /**
111      * converts the parameter to the correct Object.
112      */
113     protected void doSetValue()
114     {
115         if ( isMultiValued )
116         {
117             String JavaDoc[] ss = pp.getStrings(getKey());
118             Date JavaDoc[] dates = new Date JavaDoc[ss.length];
119             for (int i=0; i<ss.length; i++)
120             {
121                 dates[i] = getDate(ss[i]);
122             }
123             setTestValue(dates);
124         }
125         else
126         {
127             setTestValue( getDate(pp.getString(getKey())) );
128         }
129     }
130
131     private Date JavaDoc getDate(String JavaDoc dateString)
132     {
133         Date JavaDoc date = null;
134         try
135         {
136             // FIXME: Canonicalize user-entered date strings.
137 if (validator != null && validator instanceof DateStringValidator)
138             {
139                 date = ((DateStringValidator)validator).parse(dateString);
140             }
141             else
142             {
143                 date = df.parse(dateString);
144             }
145         }
146         catch (ParseException JavaDoc e)
147         {
148             //ignore, return null
149 }
150         return date;
151     }
152
153     public String JavaDoc toString()
154     {
155         String JavaDoc s = null;
156         Object JavaDoc value = getValue();
157         if (value == null)
158         {
159             s = "";
160         }
161         else if (value instanceof String JavaDoc)
162         {
163             s = (String JavaDoc)value;
164         }
165         else if (validator != null && validator instanceof DateStringValidator)
166         {
167             s= ((DateStringValidator)validator).format((Date JavaDoc)value);
168         }
169         else
170         {
171             s = df.format((Date JavaDoc)value);
172         }
173         return s;
174     }
175 }
176
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