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;
  import static org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.Unsigned.ushort;
  
  final class Int32Conversions {
  
      private Int32Conversions() {}
  
      @NotNull
      static Boolean int32ToBoolean(@NotNull Integer i) {
          return i != 0;
      }
  
      @Nullable
      static UByte int32ToByte(@NotNull Integer i) {
          if (i >= 0 && i <= UByte.MAX_VALUE) {
              return ubyte(i);
          } else {
              return null;
          }
      }
  
      @NotNull
      static Double int32ToDouble(@NotNull Integer i) {
          return i.doubleValue();
      }
  
      @NotNull
      static Float int32ToFloat(@NotNull Integer i) {
          return i.floatValue();
      }
  
      @Nullable
      static Short int32ToInt16(@NotNull Integer i) {
          if (i >= Short.MIN_VALUE && i <= Short.MAX_VALUE) {
              return i.shortValue();
          } else {
              return null;
          }
      }
  
      @NotNull
      static Long int32ToInt64(@NotNull Integer i) {
          return i.longValue();
      }
  
      @Nullable
      static Byte int32ToSByte(@NotNull Integer i) {
          if (i >= Byte.MIN_VALUE && i <= Byte.MAX_VALUE) {
              return i.byteValue();
          } else {
              return null;
          }
      }
  
      @NotNull
      static StatusCode int32ToStatusCode(@NotNull Integer i) {
          return new StatusCode(i);
      }
  
      @NotNull
      static String int32ToString(@NotNull Integer i) {
          return i.toString();
      }
  
      @Nullable
      static UShort int32ToUInt16(@NotNull Integer i) {
          if (i >= UShort.MIN_VALUE && i <= UShort.MAX_VALUE) {
              return ushort(i);
          } else {
              return null;
          }
      }
  
      @Nullable
      static UInteger int32ToUInt32(@NotNull Integer i) {
          if (i >= 0) {
              return uint(i);
          } else {
              return null;
          }
      }
  
      @Nullable
      static ULong int32ToUInt64(@NotNull Integer i) {
          if (i >= 0) {
              return ulong(i);
          } else {
              return null;
          }
      }
  
      @Nullable
      static Object convert(@Nullable Object o, BuiltinDataType targetType, boolean implicit) {
          if (o instanceof Integer) {
              Integer i = (Integer) o;
  
              return implicit ?
                  implicitConversion(i, targetType) :
                  explicitConversion(i, targetType);
          } else {
              return null;
          }
      }
  
      @Nullable
      static Object explicitConversion(@NotNull Integer i, BuiltinDataType targetType) {
          //@formatter:off
          switch (targetType) {
              case Boolean:       return int32ToBoolean(i);
              case Byte:          return int32ToByte(i);
              case Int16:         return int32ToInt16(i);
              case SByte:         return int32ToSByte(i);
              case StatusCode:    return int32ToStatusCode(i);
              case String:        return int32ToString(i);
              case UInt16:        return int32ToUInt16(i);
              case UInt32:        return int32ToUInt32(i);
              default:            return implicitConversion(i, targetType);
          }
          //@formatter:on
      }
  
      @Nullable
      static Object implicitConversion(@NotNull Integer i, BuiltinDataType targetType) {
          //@formatter:off
          switch (targetType) {
              case Double:    return int32ToDouble(i);
              case Float:     return int32ToFloat(i);
              case Int64:     return int32ToInt64(i);
              case UInt64:    return int32ToUInt64(i);
              default:        return null;
          }
          //@formatter:on
      }
  
  }
  