FINERACT-2169: Refactor external assets owner api controller;

fineract-core/src/main/java/org/apache/fineract/batch/command/CommandHandlerRegistry.java

@@ -0,0 +1,40 @@
+/**
+ * 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.fineract.batch.command;
+
+import java.util.Map;
+import java.util.function.BiFunction;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public final class CommandHandlerRegistry<K, P1, P2, R> {
+
+    private final Map<K, BiFunction<P1, P2, R>> handlers;
+
+    public void register(K key, BiFunction<P1, P2, R> handler) {
+        handlers.put(key, handler);
+    }
+
+    public R execute(K key, P1 param1, P2 param2, RuntimeException ex) {
+        return handlers.getOrDefault(key, (p1, p2) -> {
+            throw ex;
+        }).apply(param1, param2);
+
+    }
+}

fineract-core/src/main/java/org/apache/fineract/infrastructure/core/service/CommandParameterUtil.java

@@ -22,6 +22,11 @@ import org.apache.commons.lang3.StringUtils;
 
 public final class CommandParameterUtil {
 
+    public static final String INTERMEDIARY_SALE_COMMAND_VALUE = "intermediarySale";
+    public static final String SALE_COMMAND_VALUE = "sale";
+    public static final String BUY_BACK_COMMAND_VALUE = "buyback";
+    public static final String CANCEL_COMMAND_VALUE = "cancel";
+
     private CommandParameterUtil() {}
 
     public static boolean is(final String commandParam, final String commandValue) {