org.apache.openjpa.jdbc.meta.strats.XMLValueHandler Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.jdbc.meta.strats;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.stream.StreamSource;
import org.apache.openjpa.jdbc.identifier.DBIdentifier;
import org.apache.openjpa.jdbc.kernel.JDBCStore;
import org.apache.openjpa.jdbc.meta.ValueMapping;
import org.apache.openjpa.jdbc.schema.Column;
import org.apache.openjpa.jdbc.schema.ColumnIO;
import org.apache.openjpa.jdbc.sql.DBDictionary;
import org.apache.openjpa.meta.JavaTypes;
import org.apache.openjpa.util.InternalException;
/**
* Base class for xml value handlers.
*
* @author Catalina Wei
* @since 1.0
*/
public class XMLValueHandler
extends AbstractValueHandler {
private static final String PROXY_SUFFIX = "$proxy";
/**
* @deprecated
*/
public Column[] map(ValueMapping vm, String name, ColumnIO io,
boolean adapt) {
DBDictionary dict = vm.getMappingRepository().getDBDictionary();
DBIdentifier colName = DBIdentifier.newColumn(name, dict != null ? dict.delimitAll() : false);
return map(vm, colName, io, adapt);
}
public Column[] map(ValueMapping vm, DBIdentifier name, ColumnIO io,
boolean adapt) {
Column col = new Column();
col.setIdentifier(name);
col.setJavaType(JavaTypes.STRING);
col.setSize(-1);
col.setTypeIdentifier(DBIdentifier.newColumnDefinition(vm.getMappingRepository().getDBDictionary()
.xmlTypeName));
col.setXML(true);
return new Column[]{ col };
}
public Object toDataStoreValue(ValueMapping vm, Object val,
JDBCStore store) {
// check for null value.
if (val == null)
return null;
try {
JAXBContext jc = JAXBContext.newInstance(
// on update val is a proxy, that can not be marshalled.
// so we get original type if val is a proxy.
(val.getClass().getName().endsWith(PROXY_SUFFIX))
? val.getClass().getSuperclass()
: val.getClass());
Marshaller m = jc.createMarshaller();
// Some DBs, like MS SQL Server, require a different encoding than the JAXB default of UTF-8
m.setProperty("jaxb.encoding", store.getDBDictionary().getXMLTypeEncoding());
Writer result = new StringWriter();
m.marshal( val, result );
return result.toString();
}
catch (JAXBException je) {
throw new InternalException(je);
}
}
public Object toObjectValue(ValueMapping vm, Object val) {
// check for null value.
if (val == null)
return null;
try {
String className = vm.getDeclaredType().getName();
int i = className.lastIndexOf('.');
String packageName = className;
if (i != -1) {
packageName = className.substring(0, i);
}
JAXBContext jc = JAXBContext.newInstance(packageName);
Unmarshaller u = jc.createUnmarshaller();
return u.unmarshal(new StreamSource(new StringReader
(val.toString())));
}
catch (JAXBException je) {
throw new InternalException(je);
}
}
}