#region License
/*
* Copyright 2002-2006 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.Collections;
using System.ComponentModel;
namespace Spring.Expressions{
/// <summary>
/// Interface that all navigation expression nodes have to implement.
/// </summary>
/// <author>Aleksandar Seovic</author>
[TypeConverter(typeof(ExpressionConverter))]
public interface IExpression
{
/// <summary>
/// Returns expression value.
/// </summary>
/// <returns>Value of the expression.</returns>
object GetValue();
/// <summary>
/// Returns expression value.
/// </summary>
/// <param name="context">Object to evaluate expression against.</param>
/// <returns>Value of the expression.</returns>
object GetValue(object context);
/// <summary>
/// Returns expression value.
/// </summary>
/// <param name="context">Object to evaluate expression against.</param>
/// <param name="variables">Expression variables map.</param>
/// <returns>Value of the expression.</returns>
object GetValue(object context, IDictionary variables);
/// <summary>
/// Sets expression value.
/// </summary>
/// <param name="context">Object to evaluate expression against.</param>
/// <param name="newValue">New value for the last node of the expression.</param>
void SetValue(object context, object newValue);
/// <summary>
/// Sets expression value.
/// </summary>
/// <param name="context">Object to evaluate expression against.</param>
/// <param name="variables">Expression variables map.</param>
/// <param name="newValue">New value for the last node of the expression.</param>
void SetValue(object context, IDictionary variables, object newValue);
}
}
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