using System; | |
/** | |
* | |
* Licensed to the Apache Software Foundation (ASF) under one or more | |
* contributor license agreements. See the NOTICE file distributed with | |
* this work for additional information regarding copyright ownership. | |
* The ASF licenses this file to You 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. | |
*/ | |
namespace Apache.NMS.Selector | |
{ | |
/// <summary> | |
/// An expression which performs an operation on one expression value. | |
/// </summary> | |
public abstract class UnaryExpression : IExpression | |
{ | |
protected IExpression rightExpression; | |
public IExpression Right | |
{ | |
get { return rightExpression; } | |
set { rightExpression = value; } | |
} | |
protected abstract string ExpressionSymbol | |
{ | |
get; | |
} | |
public UnaryExpression(IExpression left) | |
{ | |
this.rightExpression = left; | |
} | |
public abstract object Evaluate(MessageEvaluationContext message); | |
public override string ToString() | |
{ | |
return "(" + ExpressionSymbol + " " + rightExpression.ToString() + ")"; | |
} | |
public static IExpression CreateNegate(IExpression left) | |
{ | |
return new NegateExpression(left); | |
} | |
public static IBooleanExpression CreateNOT(IBooleanExpression left) | |
{ | |
return new NOTExpression(left); | |
} | |
public static IBooleanExpression CreateBooleanCast(IExpression left) | |
{ | |
return new BooleanCastExpression(left); | |
} | |
} | |
} |