1 package org.apache.turbine.services.intake.model;
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22 import org.apache.turbine.services.intake.IntakeException;
23 import org.apache.turbine.services.intake.validator.DoubleValidator;
24 import org.apache.turbine.services.intake.xmlmodel.XmlField;
25
26 /***
27 * Creates Double Field objects.
28 *
29 * @author <a href="mailto:quintonm@bellsouth.net">Quinton McCombs</a>
30 * @version $Id: DoubleField.java 646288 2008-04-09 11:51:16Z tv $
31 */
32 public class DoubleField
33 extends Field
34 {
35 /***
36 * Constructor.
37 *
38 * @param field xml field definition object
39 * @param group xml group definition object
40 * @throws IntakeException thrown by superclass
41 */
42 public DoubleField(XmlField field, Group group)
43 throws IntakeException
44 {
45 super(field, group);
46 }
47
48 /***
49 * Sets the default value for a Double Field
50 *
51 * @param prop Parameter for the default values
52 */
53 public void setDefaultValue(String prop)
54 {
55 defaultValue = null;
56
57 if (prop == null)
58 {
59 return;
60 }
61
62 defaultValue = new Double(prop);
63 }
64
65 /***
66 * Set the empty Value. This value is used if Intake
67 * maps a field to a parameter returned by the user and
68 * the corresponding field is either empty (empty string)
69 * or non-existant.
70 *
71 * @param prop The value to use if the field is empty.
72 */
73 public void setEmptyValue(String prop)
74 {
75 emptyValue = null;
76
77 if (prop == null)
78 {
79 return;
80 }
81
82 emptyValue = new Double(prop);
83 }
84
85 /***
86 * Provides access to emptyValue such that the value returned will be
87 * acceptable as an argument parameter to Method.invoke. Subclasses
88 * that deal with primitive types should ensure that they return an
89 * appropriate value wrapped in the object wrapper class for the
90 * primitive type.
91 *
92 * @return the value to use when the field is empty or an Object that
93 * wraps the empty value for primitive types.
94 */
95 protected Object getSafeEmptyValue()
96 {
97 if (isMultiValued)
98 {
99 return new double[0];
100 }
101 else
102 {
103 return (null == getEmptyValue())
104 ? new Double(0.0) : getEmptyValue();
105 }
106 }
107
108 /***
109 * A suitable validator.
110 *
111 * @return A suitable validator
112 */
113 protected String getDefaultValidator()
114 {
115 return DoubleValidator.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 Double[] inputs = parser.getDoubleObjects(getKey());
126 double[] values = new double[inputs.length];
127
128 for (int i = 0; i < inputs.length; i++)
129 {
130 values[i] = inputs[i] == null
131 ? ((Double) getEmptyValue()).doubleValue()
132 : inputs[i].doubleValue();
133 }
134
135 setTestValue(values);
136 }
137 else
138 {
139 setTestValue(parser.getDoubleObject(getKey(), (Double)getEmptyValue()));
140 }
141 }
142
143 }