A sample finder target policy

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@1243932 13f79535-47bb-0310-9956-ffa450edef68

openjpa-slice/src/test/java/org/apache/openjpa/slice/policy/SampleFinderPolicy.java

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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.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
+	}
+
+}