1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/**
* <copyright>
*
* Copyright (c) 2005, 2006, 2007, 2008 Springsite BV (The Netherlands) and others
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* </copyright>
*
* $Id: ExternalType.java,v 1.4 2009/10/15 20:35:48 mtaal Exp $
*/
package org.eclipse.emf.teneo.hibernate.mapping;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Properties;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EClassifier;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.ecore.InternalEObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.teneo.PackageRegistryProvider;
import org.eclipse.emf.teneo.hibernate.mapper.HbMapperConstants;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.usertype.ParameterizedType;
import org.hibernate.usertype.UserType;
/**
* Provides a way to store external references (references to objects not in the same datastore) as a string/uri.
*
* @author <a href="mailto:mtaal@elver.org">Martin Taal</a>
*/
public class ExternalType implements UserType, ParameterizedType {
private static final int[] SQL_TYPES = { Types.VARCHAR };
private EClass eClass;
private EPackage.Registry registry;
public int[] sqlTypes() {
return SQL_TYPES;
}
public Class<?> returnedClass() {
return eClass.getInstanceClass();
}
public boolean isMutable() {
return true;
}
public ExternalType() {
registry = PackageRegistryProvider.getInstance().getPackageRegistry();
}
public Object deepCopy(Object value) {
return value;
}
public boolean equals(Object x, Object y) {
if (x == y) {
return true;
}
if (x == null || y == null) {
return false;
}
return x.equals(y);
}
public Object nullSafeGet(ResultSet resultSet, String[] names, SessionImplementor sessionImplementor, Object owner) throws SQLException {
final String data = resultSet.getString(names[0]);
if (data == null) {
return null;
}
// now create a new instance and set its proxyuri
final InternalEObject newValue = (InternalEObject) eClass.getEPackage().getEFactoryInstance().create(eClass);
final URI uri = URI.createURI(data);
newValue.eSetProxyURI(uri);
return newValue;
}
public void nullSafeSet(PreparedStatement statement, Object value, int index, SessionImplementor sessionImplementor) throws SQLException {
String pvalue = null;
if (value != null) {
final Resource res = ((InternalEObject) value).eResource();
URI uri = res.getURI();
final String fragment = res.getURIFragment((EObject) value);
uri = uri.appendFragment(fragment);
pvalue = uri.toString();
}
if (pvalue != null) {
statement.setString(index, pvalue);
} else {
statement.setNull(index, Types.VARCHAR);
}
}
public Serializable disassemble(Object value) {
return (Serializable) value;
}
public Object assemble(Serializable cachedValue, Object owner) {
return cachedValue;
}
public Object replace(Object original, Object target, Object owner) {
return original;
}
public int hashCode(Object x) {
return x.hashCode();
}
public void setParameterValues(Properties properties) {
final String ePackageNsUri = properties.getProperty(HbMapperConstants.EPACKAGE_PARAM);
if (ePackageNsUri == null || ePackageNsUri.length() == 0) {
throw new IllegalArgumentException("Could not find custom UserType property "
+ HbMapperConstants.EPACKAGE_PARAM);
}
final EPackage epackage = registry.getEPackage(ePackageNsUri);
if (epackage == null) {
throw new IllegalArgumentException("Could not find ePackage using nsuri " + ePackageNsUri);
}
final String eClassName = properties.getProperty(HbMapperConstants.ECLASS_NAME_META);
if (eClassName == null) {
throw new IllegalArgumentException("Could not find custom UserType property "
+ HbMapperConstants.ECLASS_NAME_META);
}
final EClassifier eclassifier = epackage.getEClassifier(eClassName);
if (eclassifier instanceof EClass) {
eClass = (EClass) eclassifier;
} else {
if (eclassifier == null) {
throw new IllegalArgumentException("Missing eClass " + eClassName + " in package implementation "
+ epackage.getName());
} else {
throw new IllegalArgumentException("Found property of type " + eclassifier.getClass().getName()
+ " when an EClass was expected.");
}
}
}
}
|
