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1
19 package org.apache.cayenne.map;
20
21 import java.util.ArrayList  ;
22 import java.util.Collection ;
23 import java.util.Collections ;
24 import java.util.Iterator ;
25 import java.util.Map ;
26 import java.util.SortedMap ;
27 import java.util.TreeMap ;
28
29 import org.apache.cayenne.CayenneRuntimeException;
30 import org.apache.cayenne.util.Util;
31 import org.apache.cayenne.util.XMLEncoder;
32
33
39 public class EmbeddedAttribute extends Attribute {
40
41 protected String type;
42 protected SortedMap attributeOverrides;
43
44 public EmbeddedAttribute() {
45 attributeOverrides = new TreeMap ();
46 }
47
48 public EmbeddedAttribute(String name) {
49 this();
50 setName(name);
51 }
52
53 public EmbeddedAttribute(String name, String type, ObjEntity entity) {
54 this();
55 setName(name);
56 setType(type);
57 setEntity(entity);
58 }
59
60 public void encodeAsXML(XMLEncoder encoder) {
61 encoder.print("<embedded-attribute name=\"" + getName() + '\"');
62 if (getType() != null) {
63 encoder.print(" type=\"");
64 encoder.print(getType());
65 encoder.print('\"');
66 }
67
68 if (attributeOverrides.isEmpty()) {
69 encoder.println("/>");
70 return;
71 }
72
73 encoder.println('>');
74
75 encoder.indent(1);
76
77
78
79 Iterator it = attributeOverrides.entrySet().iterator();
80 while (it.hasNext()) {
81 Map.Entry e = (Map.Entry ) it.next();
82 encoder.print("<embeddable-attribute-override name=\"");
83 encoder.print(e.getKey().toString());
84 encoder.print("\" db-attribute-path=\"");
85 encoder.print(e.getValue().toString());
86 encoder.println("\"/>");
87 }
88
89 encoder.indent(-1);
90 encoder.println("</embedded-attribute>");
91 }
92
93 public Map getAttributeOverrides() {
94 return Collections.unmodifiableMap(attributeOverrides);
95 }
96
97 public Embeddable getEmbeddable() {
98 if (type == null) {
99 return null;
100 }
101
102 return getNonNullNamespace().getEmbeddable(type);
103 }
104
105 private ObjAttribute makeObjAttribute(EmbeddableAttribute embeddableAttribute) {
106 String dbPath = (String ) attributeOverrides.get(embeddableAttribute.getName());
107 if (dbPath == null) {
108 dbPath = embeddableAttribute.getDbAttributeName();
109 }
110
111 return makeObjAttribute(embeddableAttribute, dbPath);
112 }
113
114 private ObjAttribute makeObjAttribute(
115 EmbeddableAttribute embeddableAttribute,
116 String dbPath) {
117 String fullName = getName() + "." + embeddableAttribute.getName();
118
119 ObjAttribute oa = new ObjAttribute(
120 fullName,
121 embeddableAttribute.getType(),
122 (ObjEntity) getEntity());
123 oa.setDbAttributeName(dbPath);
124 return oa;
125 }
126
127
131 public ObjAttribute getAttributeForDbPath(String dbPath) {
132
133 Embeddable e = getEmbeddable();
134 if (e == null) {
135 return null;
136 }
137
138 EmbeddableAttribute ea = null;
139
140 Iterator overrides = attributeOverrides.entrySet().iterator();
141 while (overrides.hasNext()) {
142 Map.Entry override = (Map.Entry ) overrides.next();
143 if (dbPath.equals(override.getValue())) {
144 ea = e.getAttribute(override.getKey().toString());
145 break;
146 }
147 }
148
149 if (ea == null) {
150 ea = e.getAttributeForDbPath(dbPath);
151 }
152
153 if (ea != null) {
154 return makeObjAttribute(ea, dbPath);
155 }
156
157 return null;
158 }
159
160
164 public ObjAttribute getAttribute(String name) {
165 Embeddable e = getEmbeddable();
166 if (e == null) {
167 return null;
168 }
169
170 EmbeddableAttribute ea = e.getAttribute(name);
171 if (ea == null) {
172 return null;
173 }
174
175 return makeObjAttribute(ea);
176 }
177
178
182 public Collection getAttributes() {
183 Embeddable e = getEmbeddable();
184 if (e == null) {
185 return Collections.EMPTY_LIST;
186 }
187
188 Collection embeddableAttributes = e.getAttributes();
189 Collection objectAttributes = new ArrayList (embeddableAttributes.size());
190 Iterator it = embeddableAttributes.iterator();
191 while (it.hasNext()) {
192 EmbeddableAttribute ea = (EmbeddableAttribute) it.next();
193 objectAttributes.add(makeObjAttribute(ea));
194 }
195
196 return objectAttributes;
197 }
198
199 public void addAttributeOverride(String name, String dbAttributeName) {
200 attributeOverrides.put(name, dbAttributeName);
201 }
202
203 public void removeAttributeOverride(String name) {
204 attributeOverrides.remove(name);
205 }
206
207
210 public String getType() {
211 return type;
212 }
213
214
218 public Class getJavaClass() {
219 if (this.getType() == null) {
220 return null;
221 }
222
223 try {
224 return Util.getJavaClass(getType());
225 }
226 catch (ClassNotFoundException e) {
227 throw new CayenneRuntimeException("Failed to load class for name '"
228 + this.getType()
229 + "': "
230 + e.getMessage(), e);
231 }
232 }
233
234
237 public void setType(String type) {
238 this.type = type;
239 }
240
241
246 final MappingNamespace getNonNullNamespace() {
247
248 if (entity == null) {
249 throw new CayenneRuntimeException("Embedded attribute '"
250 + getName()
251 + "' has no parent Entity.");
252 }
253
254 return entity.getNonNullNamespace();
255 }
256 }
257 |
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