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OPENJPA-240 Feature:Persistent field mapping support for XML column type. 

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@547827 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
David J. Wisneski 2007-06-15 23:41:50 +00:00
parent 90d053f4ef
commit ee3c0b1dc4
2 changed files with 161 additions and 0 deletions
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64
openjpa-xmlmapping-5/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<!--
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
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa-xmlmapping-5</artifactId>
<packaging>jar</packaging>
<name>OpenJPA Xmlmapping 1.5</name>
<description>OpenJPA Xmlmapping 1.5</description>
<url>http://incubator.apache.org/projects/openjpa</url>
<parent>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa-parent</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa-kernel</artifactId>
<version>${pom.version}</version>
</dependency>
<dependency>
<groupId>org.apache.openjpa</groupId>
<artifactId>openjpa-jdbc</artifactId>
<version>${pom.version}</version>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

97
openjpa-xmlmapping-5/src/main/java/org/apache/openjpa/xmlmapping/XmlValueHandler.java Normal file
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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
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.xmlmapping;
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.kernel.JDBCStore;
import org.apache.openjpa.jdbc.meta.ValueMapping;
import org.apache.openjpa.jdbc.meta.strats.AbstractValueHandler;
import org.apache.openjpa.jdbc.schema.Column;
import org.apache.openjpa.jdbc.schema.ColumnIO;
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";
public Column[] map(ValueMapping vm, String name, ColumnIO io,
boolean adapt) {
Column col = new Column();
col.setName(name);
col.setJavaType(JavaTypes.STRING);
col.setSize(-1);
col.setTypeName(vm.getMappingRepository().getDBDictionary()
.xmlTypeName);
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();
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 packageName = vm.getDeclaredType().getPackage().getName();
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);
}
}
}