1 package org.apache.turbine.services.intake.model;
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19 import org.apache.commons.lang.StringUtils;
20
21 import org.apache.turbine.services.intake.IntakeException;
22 import org.apache.turbine.services.intake.validator.LongValidator;
23 import org.apache.turbine.services.intake.xmlmodel.XmlField;
24
25 /***
26 * Processor for long fields.
27 *
28 * @author <a href="mailto:jmcnally@collab.net>John McNally</a>
29 * @author <a href="mailto:Colin.Chalmers@maxware.nl">Colin Chalmers</a>
30 * @version $Id: LongField.java 264148 2005-08-29 14:21:04Z henning $
31 */
32 public class LongField
33 extends Field
34 {
35
36 /***
37 * Constructor.
38 *
39 * @param field xml field definition object
40 * @param group xml group definition object
41 * @throws IntakeException thrown by superclass
42 */
43 public LongField(XmlField field, Group group)
44 throws IntakeException
45 {
46 super(field, group);
47 }
48
49 /***
50 * Sets the default value for an Long Field
51 *
52 * @param prop Parameter for the default values
53 */
54 public void setDefaultValue(String prop)
55 {
56 defaultValue = null;
57
58 if (prop == null)
59 {
60 return;
61 }
62
63 defaultValue = new Long(prop);
64 }
65
66 /***
67 * Set the empty Value. This value is used if Intake
68 * maps a field to a parameter returned by the user and
69 * the corresponding field is either empty (empty string)
70 * or non-existant.
71 *
72 * @param prop The value to use if the field is empty.
73 */
74 public void setEmptyValue(String prop)
75 {
76 emptyValue = null;
77
78 if (prop == null)
79 {
80 return;
81 }
82
83 emptyValue = new Long(prop);
84 }
85
86 /***
87 * Provides access to emptyValue such that the value returned will be
88 * acceptable as an argument parameter to Method.invoke. Subclasses
89 * that deal with primitive types should ensure that they return an
90 * appropriate value wrapped in the object wrapper class for the
91 * primitive type.
92 *
93 * @return the value to use when the field is empty or an Object that
94 * wraps the empty value for primitive types.
95 */
96 protected Object getSafeEmptyValue()
97 {
98 if (isMultiValued)
99 {
100 return new long[0];
101 }
102 else
103 {
104 return (null == getEmptyValue()) ? new Long(0l) : getEmptyValue();
105 }
106 }
107
108 /***
109 * A suitable validator.
110 *
111 * @return A suitable validator
112 */
113 protected String getDefaultValidator()
114 {
115 return LongValidator.class.getName();
116 }
117
118 /***
119 * Sets the value of the field from data in the parser.
120 */
121 protected void doSetValue()
122 {
123 if (isMultiValued)
124 {
125 String[] inputs = parser.getStrings(getKey());
126 long[] values = new long[inputs.length];
127 for (int i = 0; i < inputs.length; i++)
128 {
129 values[i] = StringUtils.isNotEmpty(inputs[i])
130 ? new Long(inputs[i]).longValue()
131 : ((Long) getEmptyValue()).longValue();
132 }
133 setTestValue(values);
134 }
135 else
136 {
137 String val = parser.getString(getKey());
138 setTestValue(StringUtils.isNotEmpty(val)
139 ? new Long(val) : (Long) getEmptyValue());
140 }
141 }
142
143 }