#region License
/*
* Copyright 2002-2005 the original author or authors.
*
* Licensed 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.
*/
#endregion
using System;
using System.Collections;
using System.Runtime.Serialization;
using Spring.Util;
namespace Spring.Expressions{
/// <summary>
/// Represents logical BETWEEN operator.
/// </summary>
/// <author>Aleksandar Seovic</author>
[Serializable]
public class OpBetween : BinaryOperator
{
/// <summary>
/// Create a new instance
/// </summary>
public OpBetween()
{
}
/// <summary>
/// Create a new instance from SerializationInfo
/// </summary>
protected OpBetween(SerializationInfo info, StreamingContext context)
: base(info, context)
{
}
/// <summary>
/// Returns a value for the logical IN operator node.
/// </summary>
/// <param name="context">Context to evaluate expressions against.</param>
/// <param name="evalContext">Current expression evaluation context.</param>
/// <returns>
/// true if the left operand is contained within the right operand, false otherwise.
/// </returns>
protected override object Get(object context, EvaluationContext evalContext)
{
object value = GetLeftValue(context, evalContext);
IList range = GetRightValue(context, evalContext) as IList;
if (range == null || range.Count != 2)
{
throw new ArgumentException("Right operand for the 'between' operator has to be a two-element list.");
}
object low = range[0];
object high = range[1];
return (CompareUtils.Compare(value, low) >= 0 && CompareUtils.Compare(value, high) <= 0);
}
}
}
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