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1
19
20 package org.apache.cayenne.access.types;
21
22 import java.lang.reflect.Method  ;
23 import java.sql.CallableStatement ;
24 import java.sql.PreparedStatement ;
25 import java.sql.ResultSet ;
26
27 import org.apache.cayenne.dba.TypesMapping;
28 import org.apache.cayenne.map.DbAttribute;
29 import org.apache.cayenne.validation.ValidationResult;
30
31
42 public class EnumType implements ExtendedType {
43
44 protected Class enumClass;
45 protected Object [] values;
46
47 public EnumType(Class enumClass) {
48 if (enumClass == null) {
49 throw new IllegalArgumentException ("Null enum class");
50 }
51
52 this.enumClass = enumClass;
53
54 try {
55 Method m = enumClass.getMethod("values");
56 this.values = (Object []) m.invoke(null);
57 }
58 catch (Exception e) {
59 throw new IllegalArgumentException ("Class "
60 + enumClass.getName()
61 + " is not an Enum", e);
62 }
63 }
64
65 public String getClassName() {
66 return enumClass.getName();
67 }
68
69
72 public boolean validateProperty(
73 Object source,
74 String property,
75 Object value,
76 DbAttribute dbAttribute,
77 ValidationResult validationResult) {
78
79 return AbstractType.validateNull(
80 source,
81 property,
82 value,
83 dbAttribute,
84 validationResult);
85 }
86
87 public void setJdbcObject(
88 PreparedStatement statement,
89 Object value,
90 int pos,
91 int type,
92 int precision) throws Exception {
93
94 if (value instanceof Enum ) {
95
96 Enum e = (Enum ) value;
97
98 if (TypesMapping.isNumeric(type)) {
99 statement.setInt(pos, e.ordinal());
100 }
101 else {
102 statement.setString(pos, e.name());
103 }
104 }
105 else {
106 statement.setNull(pos, type);
107 }
108 }
109
110 public Object materializeObject(ResultSet rs, int index, int type) throws Exception {
111 if (TypesMapping.isNumeric(type)) {
112 int i = rs.getInt(index);
113 return (rs.wasNull() || index < 0) ? null : values[i];
114 }
115 else {
116 String string = rs.getString(index);
117 return string != null ? Enum.valueOf(enumClass, string) : null;
118 }
119 }
120
121 public Object materializeObject(CallableStatement rs, int index, int type)
122 throws Exception {
123
124 if (TypesMapping.isNumeric(type)) {
125 int i = rs.getInt(index);
126 return (rs.wasNull() || index < 0) ? null : values[i];
127 }
128 else {
129 String string = rs.getString(index);
130 return string != null ? Enum.valueOf(enumClass, string) : null;
131 }
132 }
133 }
134 |
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