|
1
10
11 package com.triactive.jdo.model;
12
13 import java.util.List  ;
14 import java.util.Set ;
15 import javax.jdo.JDOFatalInternalException;
16 import org.w3c.dom.Element ;
17
18
19 public class MapMetaData extends MetaData
20 {
21 protected final Class keyType;
22 protected final Class valueType;
23 protected final boolean embeddedKey;
24 protected final boolean embeddedValue;
25 protected final boolean allowsNullValues;
26
27 public MapMetaData(FieldMetaData fmd, Element elem)
28 {
29 super(fmd.getClassMetaData().getSourceURL(), elem);
30
31 String typeAttr = elem.getAttribute("key-type");
32 String embeddedAttr = elem.getAttribute("embedded-key");
33
34 keyType = getReferencedType(typeAttr, fmd.getClassMetaData());
35
36 if (embeddedAttr.length() > 0)
37 embeddedKey = Boolean.valueOf(embeddedAttr).booleanValue();
38 else
39 embeddedKey = Types.isDefaultEmbeddedType(keyType);
40
41 typeAttr = elem.getAttribute("value-type");
42 embeddedAttr = elem.getAttribute("embedded-value");
43
44 valueType = getReferencedType(typeAttr, fmd.getClassMetaData());
45
46 if (embeddedAttr.length() > 0)
47 embeddedValue = Boolean.valueOf(embeddedAttr).booleanValue();
48 else
49 embeddedValue = Types.isDefaultEmbeddedType(valueType);
50
51 if (fmd.getType() == java.util.Hashtable .class)
52 allowsNullValues = false;
53 else
54 allowsNullValues = true;
55 }
56
57 public String getJavaName()
58 {
59 throw new JDOFatalInternalException("MapMetaData has no equivalent Java identifier");
60 }
61
62 public Class getKeyType()
63 {
64 return keyType;
65 }
66
67 public Class getValueType()
68 {
69 return valueType;
70 }
71
72 public boolean isEmbeddedKey()
73 {
74 return embeddedKey;
75 }
76
77 public boolean isEmbeddedValue()
78 {
79 return embeddedValue;
80 }
81
82 public boolean allowsNullValues()
83 {
84 return allowsNullValues;
85 }
86
87 public ColumnOptions getKeyColumnOptions()
88 {
89 return new ColumnOptions()
90 {
91 public String getLength()
92 {
93 String length = getVendorExtension(MY_VENDOR, "key-length");
94
95 if (length == null)
96 length = getVendorExtension(MY_VENDOR, "length");
97
98 return length;
99 }
100
101 public String getPrecision()
102 {
103 String precision = getVendorExtension(MY_VENDOR, "key-precision");
104
105 if (precision == null)
106 precision = getVendorExtension(MY_VENDOR, "precision");
107
108 return precision;
109 }
110
111 public String getScale()
112 {
113 String scale = getVendorExtension(MY_VENDOR, "key-scale");
114
115 if (scale == null)
116 scale = getVendorExtension(MY_VENDOR, "scale");
117
118 return scale;
119 }
120 };
121 }
122
123 public ColumnOptions getValueColumnOptions()
124 {
125 return new ColumnOptions()
126 {
127 public String getLength()
128 {
129 return getVendorExtension(MY_VENDOR, "value-length");
130 }
131
132 public String getPrecision()
133 {
134 return getVendorExtension(MY_VENDOR, "value-precision");
135 }
136
137 public String getScale()
138 {
139 return getVendorExtension(MY_VENDOR, "value-scale");
140 }
141 };
142 }
143
144 public boolean isInverseMap()
145 {
146 return getOwnerField() != null;
147 }
148
149 public boolean clearOnDelete()
150 {
151 String codAttr = getVendorExtension(MY_VENDOR, "clear-on-delete");
152
153 return codAttr == null ? true : Boolean.valueOf(codAttr).booleanValue();
154 }
155
156 public FieldMetaData getOwnerField()
157 {
158 String ownerFieldName = getVendorExtension(MY_VENDOR, "owner-field");
159
160 return ownerFieldName == null ? null : FieldMetaData.forField(valueType, ownerFieldName);
161 }
162
163 public FieldMetaData getKeyField()
164 {
165 String keyFieldName = getVendorExtension(MY_VENDOR, "key-field");
166
167 return keyFieldName == null ? null : FieldMetaData.forField(valueType, keyFieldName);
168 }
169
170 void getReferencedClasses(final String vendorID, final List ordered, final Set referenced)
171 {
172 ClassMetaData cmd = ClassMetaData.forClass(keyType);
173
174 if (cmd != null)
175 cmd.getReferencedClasses(vendorID, ordered, referenced);
176
177 cmd = ClassMetaData.forClass(valueType);
178
179 if (cmd != null)
180 cmd.getReferencedClasses(vendorID, ordered, referenced);
181 }
182 }
183 |
Popular Tags |
Java API By Example, From Geeks To Geeks.