/*
* 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.jdbc.conf;
import org.apache.commons.lang.StringUtils;
import org.apache.openjpa.jdbc.meta.MetaDataPlusMappingFactory;
import org.apache.openjpa.lib.conf.Configuration;
import org.apache.openjpa.lib.conf.Configurations;
import org.apache.openjpa.lib.conf.PluginValue;
import org.apache.openjpa.lib.log.Log;
import org.apache.openjpa.lib.util.Localizer;
import org.apache.openjpa.meta.MetaDataFactory;
/**
* Handles the complex logic of creating a {@link MetaDataFactory} for
* combined metadata and mapping.
*
* @author Abe White
* @nojavadoc
*/
public class MappingFactoryValue
extends PluginValue {
private static final Localizer _loc = Localizer.forPackage
(MappingFactoryValue.class);
private String[] _metaFactoryDefaults = null;
private String[] _mappedMetaFactoryDefaults = null;
public MappingFactoryValue(String prop) {
super(prop, false);
}
/**
* Default setting for a given <code>MetaDataFactory</code> alias setting.
* If a <code>MappingFactory</code> value is not supplied, we check these
* defaults against the <code>MetaDataFactory</code> setting. If the
* <code>MetaDataFactory</code> does not have a default, we assume it
* handles both metadata and mapping factory.
*/
public void setMetaDataFactoryDefault(String metaAlias,
String mappingAlias) {
_metaFactoryDefaults = setAlias(metaAlias, mappingAlias,
_metaFactoryDefaults);
}
/**
* If the <code>Mapping</code> property is set, we check these defaults
* before checking metadata factory defaults.
*/
public void setMappedMetaDataFactoryDefault(String metaAlias,
String mappingAlias) {
_mappedMetaFactoryDefaults = setAlias(metaAlias, mappingAlias,
_mappedMetaFactoryDefaults);
}
/**
* Intantiate a {@link MetaDataFactory} responsible for both metadata and
* mapping.
*/
public MetaDataFactory instantiateMetaDataFactory(Configuration conf,
PluginValue metaPlugin, String mapping) {
return instantiateMetaDataFactory(conf, metaPlugin, mapping, true);
}
/**
* Intantiate a {@link MetaDataFactory} responsible for both metadata and
* mapping.
*/
public MetaDataFactory instantiateMetaDataFactory(Configuration conf,
PluginValue metaPlugin, String mapping, boolean fatal) {
String clsName = getClassName();
String props = getProperties();
String metaClsName = metaPlugin.getClassName();
String metaProps = metaPlugin.getProperties();
// if no mapping factory set, check for default for this factory
if (StringUtils.isEmpty(clsName)) {
String def;
if (!StringUtils.isEmpty(mapping)) {
def = unalias(metaPlugin.alias(metaClsName),
_mappedMetaFactoryDefaults, true);
if (def != null)
clsName = unalias(def);
}
if (StringUtils.isEmpty(clsName)) {
def = unalias(metaPlugin.alias(metaClsName),
_metaFactoryDefaults, true);
if (def != null)
clsName = unalias(def);
}
}
// if mapping factory and metadata factory the same, combine
// into metadata factory
if (clsName != null && clsName.equals(metaClsName)) {
if (props != null && metaProps == null)
metaProps = props;
else if (props != null)
metaProps += "," + props;
clsName = null;
props = null;
}
// instantiate factories
MetaDataFactory map = (MetaDataFactory) newInstance(clsName,
MetaDataFactory.class, conf, fatal);
MetaDataFactory meta;
if (map != null
&& map.getClass().getName().indexOf("Deprecated") != -1) {
// deprecated mapping factories take over metadata too, so we have
// to special-case them to treat them like metadata factory only
meta = map;
map = null;
} else {
meta = (MetaDataFactory) metaPlugin.newInstance
(metaClsName, MetaDataFactory.class, conf, fatal);
}
// configure factories. if only meta factory, allow user to specify
// its mapping properties in the mapping factory setting
if (map == null && props != null) {
if (metaProps == null)
metaProps = props;
else
metaProps += ", " + props;
}
Configurations.configureInstance(map, conf, props,
(fatal) ? getProperty() : null);
Configurations.configureInstance(meta, conf, metaProps,
(fatal) ? metaPlugin.getProperty() : null);
Log log = conf.getLog(JDBCConfiguration.LOG_METADATA);
if (log.isTraceEnabled()) {
log.trace(_loc.get("meta-factory", meta));
if (map != null)
log.trace(_loc.get("map-factory", map));
}
// if no mapping setting, return meta factory alone, assuming it handles
// both metadata and mapping
MetaDataFactory ret = (map == null) ? meta
: new MetaDataPlusMappingFactory(meta, map);
return ret;
}
}