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1
56 package org.objectstyle.cayenne.service;
57
58 import org.apache.commons.beanutils.PropertyUtils;
59 import org.objectstyle.cayenne.CayenneRuntimeException;
60 import org.objectstyle.cayenne.ObjectId;
61 import org.objectstyle.cayenne.Persistent;
62 import org.objectstyle.cayenne.distribution.GlobalID;
63 import org.objectstyle.cayenne.graph.GraphChangeHandler;
64
65
72 class ClientToServerDiffConverter implements GraphChangeHandler {
73
74 ObjectDataContext context;
75
76 ClientToServerDiffConverter(ObjectDataContext context) {
77 this.context = context;
78 }
79
80 public void nodeIdChanged(Object  nodeId, Object newId) {
81 throw new CayenneRuntimeException(
82 "Not supported - client is not allowed to change Global ID of server objects.");
83 }
84
85 public void nodeCreated(Object nodeId) {
86 ObjectId id = toObjectId(nodeId);
87 context.createAndRegisterNewObject(id);
88 }
89
90 public void nodeRemoved(Object nodeId) {
91 Persistent object = findObject(nodeId);
92 context.deleteObject(object);
93 }
94
95 public void nodePropertyChanged(
96 Object nodeId,
97 String property,
98 Object oldValue,
99 Object newValue) {
100
101 Persistent object = findObject(nodeId);
102 try {
103 PropertyUtils.setSimpleProperty(object, property, newValue);
104 }
105 catch (Exception e) {
106 throw new CayenneRuntimeException("Error setting property: " + property, e);
107 }
108 }
109
110 public void arcCreated(Object nodeId, Object targetNodeId, Object arcId) {
111 throw new CayenneRuntimeException(
112 "TODO: implement relationship change updates...");
113 }
114
115 public void arcDeleted(Object nodeId, Object targetNodeId, Object arcId) {
116 throw new CayenneRuntimeException(
117 "TODO: implement relationship change updates...");
118 }
119
120 Persistent findObject(Object nodeId) {
121 ObjectId id = toObjectId(nodeId);
122 return context.getObjectStore().getObject(id);
123 }
124
125 ObjectId toObjectId(Object nodeId) {
126 if (nodeId instanceof GlobalID) {
127 return context.getEntityResolver().convertToObjectID((GlobalID) nodeId);
128 }
129 else if (nodeId instanceof ObjectId) {
130 return (ObjectId) nodeId;
131 }
132 else if (nodeId == null) {
133 throw new NullPointerException ("Null GlobalID");
134 }
135 else {
136 throw new CayenneRuntimeException(
137 "Client node id is expected to be GlobalID, got: " + nodeId);
138 }
139 }
140 }
141 |
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