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.operators;
  
  import com.google.common.primitives.UnsignedLongs;
  import org.eclipse.milo.opcua.sdk.server.events.OperatorContext;
  import org.eclipse.milo.opcua.sdk.server.model.nodes.objects.BaseEventTypeNode;
  import org.eclipse.milo.opcua.stack.core.BuiltinDataType;
  import org.jetbrains.annotations.Nullable;
  
  public class LessThanOrEqual extends ImplicitConversionBinaryOperator<Boolean> {
  
      LessThanOrEqual() {}
  
      @Nullable
      @Override
      protected Boolean apply(
          OperatorContext context,
          BaseEventTypeNode eventNode,
          BuiltinDataType dataType,
          @Nullable Object operand0,
          @Nullable Object operand1) {
  
          if (operand0 instanceof Number && operand1 instanceof Number) {
              Number n0 = (Number) operand0;
              Number n1 = (Number) operand1;
  
              switch (dataType) {
                  case SByte:
                  case Int16:
                  case Int32:
                  case Int64:
                  case Byte:
                  case UInt16:
                  case UInt32:
                      return n0.longValue() <= n1.longValue();
  
                  case UInt64:
                      return UnsignedLongs.compare(n0.longValue(), n1.longValue()) <= 0;
  
                  case Float:
                      return n0.floatValue() <= n1.floatValue();
  
                  case Double:
                      return n0.doubleValue() <= n1.doubleValue();
  
                  default:
                      return false;
              }
          } else {
              return false;
          }
      }
  
  }
  