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.events.conversions;
  
  import org.eclipse.milo.opcua.stack.core.BuiltinDataType;
  import org.eclipse.milo.opcua.stack.core.types.builtin.StatusCode;
  import org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.UByte;
  import org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.UInteger;
  import org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.ULong;
  import org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.UShort;
  import org.jetbrains.annotations.NotNull;
  import org.jetbrains.annotations.Nullable;
  
  import static org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.Unsigned.ubyte;
  import static org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.Unsigned.uint;
  import static org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.Unsigned.ulong;
  
  final class UInt16Conversions {
  
      private UInt16Conversions() {}
  
      @NotNull
      static Boolean uInt16ToBoolean(@NotNull UShort us) {
          return us.intValue() != 0;
      }
  
      @Nullable
      static UByte uInt16ToByte(@NotNull UShort us) {
          int i = us.intValue();
  
          if (i <= UByte.MAX_VALUE) {
              return ubyte(i);
          } else {
              return null;
          }
      }
  
      @NotNull
      static Double uInt16ToDouble(@NotNull UShort us) {
          return us.doubleValue();
      }
  
      @NotNull
      static Float uInt16ToFloat(@NotNull UShort us) {
          return us.floatValue();
      }
  
      @Nullable
      static Short uInt16ToInt16(@NotNull UShort us) {
          int i = us.intValue();
  
          if (i <= Short.MAX_VALUE) {
              return (short) i;
          } else {
              return null;
          }
      }
  
      @NotNull
      static Integer uInt16ToInt32(@NotNull UShort us) {
          return us.intValue();
      }
  
      @NotNull
      static Long uInt16ToInt64(@NotNull UShort us) {
          return us.longValue();
      }
  
      @Nullable
      static Byte uInt16ToSByte(@NotNull UShort us) {
          int i = us.intValue();
  
          if (i <= Byte.MAX_VALUE) {
              return (byte) i;
          } else {
              return null;
          }
      }
  
      @NotNull
      static StatusCode uInt16ToStatusCode(@NotNull UShort us) {
          return new StatusCode(us.longValue() << 16);
      }
  
      @NotNull
      static String uInt16ToString(@NotNull UShort us) {
          return us.toString();
      }
  
      @NotNull
      static UInteger uInt16ToUInt32(@NotNull UShort us) {
          return uint(us.intValue());
      }
  
      @NotNull
      static ULong uInt16ToUInt64(@NotNull UShort us) {
          return ulong(us.longValue());
      }
  
      @Nullable
      static Object convert(@Nullable Object o, BuiltinDataType targetType, boolean implicit) {
          if (o instanceof UShort) {
              UShort us = (UShort) o;
  
              return implicit ?
                  implicitConversion(us, targetType) :
                  explicitConversion(us, targetType);
          } else {
              return null;
          }
      }
  
      @Nullable
      static Object explicitConversion(@NotNull UShort us, BuiltinDataType targetType) {
          //@formatter:off
          switch (targetType) {
              case Boolean:   return uInt16ToBoolean(us);
              case Byte:      return uInt16ToByte(us);
              case SByte:     return uInt16ToSByte(us);
              case String:    return uInt16ToString(us);
              default:        return implicitConversion(us, targetType);
          }
          //@formatter:on
      }
  
      @Nullable
      static Object implicitConversion(@NotNull UShort us, BuiltinDataType targetType) {
          //@formatter:off
          switch (targetType) {
              case Double:        return uInt16ToDouble(us);
              case Float:         return uInt16ToFloat(us);
              case Int16:         return uInt16ToInt16(us);
              case Int32:         return uInt16ToInt32(us);
              case Int64:         return uInt16ToInt64(us);
              case StatusCode:    return uInt16ToStatusCode(us);
              case UInt32:        return uInt16ToUInt32(us);
              case UInt64:        return uInt16ToUInt64(us);
              default:            return null;
          }
          //@formatter:on
      }
  
  }
  