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.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.uint;
  import static org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.Unsigned.ulong;
  import static org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.Unsigned.ushort;
  
  final class ByteConversions {
  
      private ByteConversions() {}
  
      @NotNull
      static Boolean byteToBoolean(@NotNull UByte ub) {
          return ub.intValue() != 0;
      }
  
      @NotNull
      static Double byteToDouble(@NotNull UByte ub) {
          return ub.doubleValue();
      }
  
      @NotNull
      static Float byteToFloat(@NotNull UByte ub) {
          return ub.floatValue();
      }
  
      @NotNull
      static Short byteToInt16(@NotNull UByte ub) {
          return ub.shortValue();
      }
  
      @NotNull
      static Integer byteToInt32(@NotNull UByte ub) {
          return ub.intValue();
      }
  
      @NotNull
      static Long byteToInt64(@NotNull UByte ub) {
          return ub.longValue();
      }
  
      @Nullable
      static Byte byteToSByte(@NotNull UByte ub) {
          return ub.intValue() > Byte.MAX_VALUE ? null : ub.byteValue();
      }
  
      @NotNull
      static String byteToString(@NotNull UByte ub) {
          return ub.toString();
      }
  
      @NotNull
      static UShort byteToUInt16(@NotNull UByte ub) {
          return ushort(ub.intValue());
      }
  
      @NotNull
      static UInteger byteToUInt32(@NotNull UByte ub) {
          return uint(ub.intValue());
      }
  
      @NotNull
      static ULong byteToUInt64(@NotNull UByte ub) {
          return ulong(ub.longValue());
      }
  
      @Nullable
      static Object convert(@NotNull Object o, BuiltinDataType targetType, boolean implicit) {
          if (o instanceof UByte) {
              UByte b = (UByte) o;
  
              return implicit ?
                  implicitConversion(b, targetType) :
                  explicitConversion(b, targetType);
          } else {
              return null;
          }
      }
  
      @Nullable
      static Object explicitConversion(@NotNull UByte b, BuiltinDataType targetType) {
          //@formatter:off
          switch (targetType) {
              case Boolean:   return byteToBoolean(b);
              case String:    return byteToString(b);
              default:        return implicitConversion(b, targetType);
          }
          //@formatter:on
      }
  
      @Nullable
      static Object implicitConversion(@NotNull UByte b, BuiltinDataType targetType) {
          //@formatter:off
          switch (targetType) {
              case Double:    return byteToDouble(b);
              case Float:     return byteToFloat(b);
              case Int16:     return byteToInt16(b);
              case Int32:     return byteToInt32(b);
              case Int64:     return byteToInt64(b);
              case SByte:     return byteToSByte(b);
              case UInt16:    return byteToUInt16(b);
              case UInt32:    return byteToUInt32(b);
              case UInt64:    return byteToUInt64(b);
              default:        return null;
          }
          //@formatter:on
      }
      
  }
  