code: /*
   * Copyright (c) 2019 the Eclipse Milo Authors
   *
   * This program and the accompanying materials are made
   * available under the terms of the Eclipse Public License 2.0
   * which is available at https://www.eclipse.org/legal/epl-2.0/
   *
   * SPDX-License-Identifier: EPL-2.0
   */
  
  package org.eclipse.milo.opcua.sdk.server.model.methods;
  
  import org.eclipse.milo.opcua.sdk.core.ValueRanks;
  import org.eclipse.milo.opcua.sdk.server.api.methods.AbstractMethodInvocationHandler;
  import org.eclipse.milo.opcua.sdk.server.api.methods.Out;
  import org.eclipse.milo.opcua.sdk.server.nodes.UaMethodNode;
  import org.eclipse.milo.opcua.stack.core.UaException;
  import org.eclipse.milo.opcua.stack.core.types.builtin.LocalizedText;
  import org.eclipse.milo.opcua.stack.core.types.builtin.NodeId;
  import org.eclipse.milo.opcua.stack.core.types.builtin.Variant;
  import org.eclipse.milo.opcua.stack.core.types.structured.Argument;
  
  public abstract class MoveOrCopyMethod extends AbstractMethodInvocationHandler {
      public static final Argument OBJECT_TO_MOVE_OR_COPY = new Argument(
          "ObjectToMoveOrCopy",
          NodeId.parse("ns=0;i=17"),
          ValueRanks.Scalar,
          null,
          new LocalizedText("", "")
      );
  
      public static final Argument TARGET_DIRECTORY = new Argument(
          "TargetDirectory",
          NodeId.parse("ns=0;i=17"),
          ValueRanks.Scalar,
          null,
          new LocalizedText("", "")
      );
  
      public static final Argument CREATE_COPY = new Argument(
          "CreateCopy",
          NodeId.parse("ns=0;i=1"),
          ValueRanks.Scalar,
          null,
          new LocalizedText("", "")
      );
  
      public static final Argument NEW_NAME = new Argument(
          "NewName",
          NodeId.parse("ns=0;i=12"),
          ValueRanks.Scalar,
          null,
          new LocalizedText("", "")
      );
  
      public static final Argument NEW_NODE_ID = new Argument(
          "NewNodeId",
          NodeId.parse("ns=0;i=17"),
          ValueRanks.Scalar,
          null,
          new LocalizedText("", "")
      );
  
      public MoveOrCopyMethod(UaMethodNode node) {
          super(node);
      }
  
      @Override
      public Argument[] getInputArguments() {
          return new Argument[]{OBJECT_TO_MOVE_OR_COPY, TARGET_DIRECTORY, CREATE_COPY, NEW_NAME};
      }
  
      @Override
      public Argument[] getOutputArguments() {
          return new Argument[]{NEW_NODE_ID};
      }
  
      @Override
      protected Variant[] invoke(AbstractMethodInvocationHandler.InvocationContext context,
                                 Variant[] inputValues) throws UaException {
          NodeId objectToMoveOrCopy = (NodeId) inputValues[0].getValue();
          NodeId targetDirectory = (NodeId) inputValues[1].getValue();
          Boolean createCopy = (Boolean) inputValues[2].getValue();
          String newName = (String) inputValues[3].getValue();
          Out<NodeId> newNodeId = new Out<NodeId>();
          invoke(context, objectToMoveOrCopy, targetDirectory, createCopy, newName, newNodeId);
          return new Variant[]{new Variant(newNodeId.get())};
      }
  
      protected abstract void invoke(AbstractMethodInvocationHandler.InvocationContext context,
                                     NodeId objectToMoveOrCopy, NodeId targetDirectory, Boolean createCopy, String newName,
                                     Out<NodeId> newNodeId) throws UaException;
  }
  