/*
* 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.slice.policy;
import java.util.List;
import org.apache.openjpa.slice.Car;
import org.apache.openjpa.slice.FinderTargetPolicy;
import org.apache.openjpa.slice.Manufacturer;
import org.apache.openjpa.slice.PObject;
import org.apache.openjpa.slice.Person;
/**
* A sample policy to target slices based on a persistent type and a given identifier.
*
* @author Pinaki Poddar
*
*/
public class SampleFinderPolicy implements FinderTargetPolicy {
@Override
public String[] getTargets(Class<?> cls, Object oid, List<String> slices, Object context) {
if (cls == PObject.class || cls == Person.class) {
int id = ((Long)oid).intValue();
return new String[]{slices.get(id%2)};
}
if (cls == Car.class) {
String vin = (String)oid;
char firstChar = Character.toLowerCase(vin.charAt(0));
return new String[]{slices.get((firstChar >= 'a' && firstChar <='m') ? 0 : 1)};
}
if (cls == Manufacturer.class) {
String name = (String)oid;
return new String[] {
slices.get("BMW".equalsIgnoreCase(name) ? 0 : "HONDA".equalsIgnoreCase(name) ? 1 : 2)
};
}
return null; // look in all slices
}
}