[ODTN]add NETCONF driver for Infinera and OPENCONFIG handler

Handler can easily create List<CharSequence> of OPENCONFIG by managing
ModelObject and Annotation together.
Handler also gives an alias to ModelObject of the same name in another
package(eg DefaultConfig), making it easier to handle within the same
class.

Change-Id: Ie4481f4020954518dc4c3c6deaced6d9e348c885
diff --git a/apps/odtn/api/src/main/java/org/onosproject/odtn/utils/openconfig/OpenConfigConfigOfAssignmentHandler.java b/apps/odtn/api/src/main/java/org/onosproject/odtn/utils/openconfig/OpenConfigConfigOfAssignmentHandler.java
new file mode 100755
index 0000000..7c7ade2
--- /dev/null
+++ b/apps/odtn/api/src/main/java/org/onosproject/odtn/utils/openconfig/OpenConfigConfigOfAssignmentHandler.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * Licensed 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.onosproject.odtn.utils.openconfig;
+
+import org.onosproject.yang.gen.v1.openconfigterminaldevice.rev20161222.openconfigterminaldevice.terminallogicalchanassignmentconfig.AssignmentTypeEnum;
+import org.onosproject.yang.gen.v1.openconfigterminaldevice.rev20161222.openconfigterminaldevice.terminallogicalchanassignmenttop.logicalchannelassignments.assignment.DefaultConfig;
+
+import java.math.BigDecimal;
+
+/**
+ * Utility class to deal with OPENCONFIG Assignment/Config ModelObject & Annotation.
+ */
+public final class OpenConfigConfigOfAssignmentHandler
+        extends OpenConfigObjectHandler<DefaultConfig> {
+
+    private static final String OPENCONFIG_NAME = "config";
+    private static final String NAME_SPACE = "http://openconfig.net/yang/terminal-device";
+
+    /**
+     * OpenConfigConfigOfAssignmentHandler Constructor.
+     *
+     * @param parent OpenConfigAssignmentHandler of parent OPENCONFIG(assignment)
+     */
+    public OpenConfigConfigOfAssignmentHandler(OpenConfigAssignmentHandler parent) {
+        modelObject = new DefaultConfig();
+        setResourceId(OPENCONFIG_NAME, NAME_SPACE, null, parent.getResourceIdBuilder());
+        annotatedNodeInfos = parent.getAnnotatedNodeInfoList();
+
+        parent.addConfig(this);
+    }
+
+    /**
+     * Add child OPENCONFIG(assignment-type).
+     *
+     * @param assignmentType AssignmentTypeEnum to be set for modelObject
+     * @return OpenConfigConfigOfAssignmentHandler of target OPENCONFIG
+     */
+    public OpenConfigConfigOfAssignmentHandler addAssignmentType(
+                                               AssignmentTypeEnum assignmentType) {
+        modelObject.assignmentType(assignmentType);
+        return this;
+    }
+
+    /**
+     * Add child OPENCONFIG(logical-channel).
+     *
+     * @param logicalChannel String to be set for modelObject
+     * @return OpenConfigConfigOfAssignmentHandler of target OPENCONFIG
+     */
+    public OpenConfigConfigOfAssignmentHandler addLogicalChannel(String logicalChannel) {
+        modelObject.logicalChannel(logicalChannel);
+        return this;
+    }
+
+    /**
+     * Add child OPENCONFIG(allocation).
+     *
+     * @param allocation BigDecimal to be set for modelObject
+     * @return OpenConfigConfigOfAssignmentHandler of target OPENCONFIG
+     */
+    public OpenConfigConfigOfAssignmentHandler addAllocation(BigDecimal allocation) {
+        modelObject.allocation(allocation);
+        return this;
+    }
+}