content: /*
   * 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.camel.component.milo;
  
  import java.util.Base64;
  import java.util.Objects;
  import java.util.UUID;
  
  import org.eclipse.milo.opcua.stack.core.types.builtin.ByteString;
  import org.eclipse.milo.opcua.stack.core.types.builtin.ExpandedNodeId;
  import org.eclipse.milo.opcua.stack.core.types.builtin.NodeId;
  import org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.UInteger;
  import org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.UShort;
  
  import static java.util.Objects.requireNonNull;
  import static org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.Unsigned.ushort;
  
  /**
   * Helper class to work with node IDs
   */
  public final class NodeIds {
  
      private NodeIds() {
      }
  
      public static NodeId toNodeId(final UShort namespaceIndex, final ExpandedNodeId nodeId) {
          requireNonNull(namespaceIndex);
  
          final Object id = nodeId.getIdentifier();
  
          if (id instanceof String) {
              return new NodeId(namespaceIndex, (String) id);
          } else if (id instanceof UInteger) {
              return new NodeId(namespaceIndex, (UInteger) id);
          } else if (id instanceof ByteString) {
              return new NodeId(namespaceIndex, (ByteString) id);
          } else if (id instanceof UUID) {
              return new NodeId(namespaceIndex, (UUID) id);
          }
  
          throw new IllegalStateException("Invalid id type: " + id);
      }
  
      public static NodeId toNodeId(final int namespaceIndex, final ExpandedNodeId nodeId) {
          return toNodeId(ushort(namespaceIndex), nodeId);
      }
  
      /**
       * Create an attribute value for the "node" attribute
       *
       * @param  namespace the namespace to use
       * @param  node      the node ID
       * @return           the value ready to append to a "node" URI attribute
       */
      public static String nodeValue(final String namespace, final String node) {
          Objects.requireNonNull(namespace);
          Objects.requireNonNull(node);
  
          final StringBuilder builder = new StringBuilder("RAW(");
          appendNamespace(builder, namespace);
          builder.append(';');
          appendNodeId(builder, node);
          builder.append(')');
          return builder.toString();
      }
  
      /**
       * Create an attribute value for the "node" attribute
       *
       * @param  namespace the namespace to use
       * @param  node      the node ID
       * @return           the value ready to append to a "node" URI attribute
       */
      public static String nodeValue(final String namespace, final int node) {
          Objects.requireNonNull(namespace);
  
          final StringBuilder builder = new StringBuilder("RAW(");
          appendNamespace(builder, namespace);
          builder.append(';');
          appendNodeId(builder, node);
          builder.append(')');
          return builder.toString();
      }
  
      /**
       * Create an attribute value for the "node" attribute
       *
       * @param  namespace the namespace to use
       * @param  node      the node ID
       * @return           the value ready to append to a "node" URI attribute
       */
      public static String nodeValue(final String namespace, final UUID node) {
          Objects.requireNonNull(namespace);
          Objects.requireNonNull(node);
  
          final StringBuilder builder = new StringBuilder("RAW(");
          appendNamespace(builder, namespace);
          builder.append(';');
          appendNodeId(builder, node);
          builder.append(')');
          return builder.toString();
      }
  
      /**
       * Create an attribute value for the "node" attribute
       *
       * @param  namespace the namespace to use
       * @param  node      the node ID
       * @return           the value ready to append to a "node" URI attribute
       */
      public static String nodeValue(final String namespace, final ByteString node) {
          Objects.requireNonNull(namespace);
          Objects.requireNonNull(node);
  
          final StringBuilder builder = new StringBuilder("RAW(");
          appendNamespace(builder, namespace);
          builder.append(';');
          appendNodeId(builder, node);
          builder.append(')');
          return builder.toString();
      }
  
      /**
       * Create an attribute value for the "node" attribute
       *
       * @param  namespace the namespace to use
       * @param  node      the node ID
       * @return           the value ready to append to a "node" URI attribute
       */
      public static String nodeValue(final int namespace, final String node) {
          Objects.requireNonNull(namespace);
          Objects.requireNonNull(node);
  
          final StringBuilder builder = new StringBuilder("RAW(");
          appendNamespace(builder, namespace);
          builder.append(';');
          appendNodeId(builder, node);
          builder.append(')');
          return builder.toString();
      }
  
      /**
       * Create an attribute value for the "node" attribute
       *
       * @param  namespace the namespace to use
       * @param  node      the node ID
       * @return           the value ready to append to a "node" URI attribute
       */
      public static String nodeValue(final int namespace, final int node) {
          Objects.requireNonNull(namespace);
  
          final StringBuilder builder = new StringBuilder("RAW(");
          appendNamespace(builder, namespace);
          builder.append(';');
          appendNodeId(builder, node);
          builder.append(')');
          return builder.toString();
      }
  
      /**
       * Create an attribute value for the "node" attribute
       *
       * @param  namespace the namespace to use
       * @param  node      the node ID
       * @return           the value ready to append to a "node" URI attribute
       */
      public static String nodeValue(final int namespace, final UUID node) {
          Objects.requireNonNull(namespace);
          Objects.requireNonNull(node);
  
          final StringBuilder builder = new StringBuilder("RAW(");
          appendNamespace(builder, namespace);
          builder.append(';');
          appendNodeId(builder, node);
          builder.append(')');
          return builder.toString();
      }
  
      /**
       * Create an attribute value for the "node" attribute
       *
       * @param  namespace the namespace to use
       * @param  node      the node ID
       * @return           the value ready to append to a "node" URI attribute
       */
      public static String nodeValue(final int namespace, final ByteString node) {
          Objects.requireNonNull(namespace);
          Objects.requireNonNull(node);
  
          final StringBuilder builder = new StringBuilder("RAW(");
          appendNamespace(builder, namespace);
          builder.append(';');
          appendNodeId(builder, node);
          builder.append(')');
          return builder.toString();
      }
  
      private static void appendNamespace(final StringBuilder builder, final String namespace) {
          builder.append("nsu=").append(namespace);
      }
  
      private static void appendNamespace(final StringBuilder builder, final int namespace) {
          builder.append("ns=").append(Integer.toUnsignedString(namespace));
      }
  
      private static void appendNodeId(final StringBuilder builder, final String nodeId) {
          builder.append("s=").append(nodeId);
      }
  
      private static void appendNodeId(final StringBuilder builder, final int nodeId) {
          builder.append("i=").append(Integer.toUnsignedString(nodeId));
      }
  
      private static void appendNodeId(final StringBuilder builder, final UUID nodeId) {
          builder.append("g=").append(nodeId);
      }
  
      private static void appendNodeId(final StringBuilder builder, final ByteString nodeId) {
          builder.append("b=").append(Base64.getEncoder().encodeToString(nodeId.bytes()));
      }
  
  }
  