using System; | |
using System.Text; | |
using System.Collections; | |
using System.Collections.Generic; | |
/** | |
* | |
* 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> | |
/// A boolean expression which checks if an expression value is | |
/// contained in a list of defined values. | |
/// </summary> | |
public class InExpression : BooleanUnaryExpression | |
{ | |
private bool notNot; | |
private ArrayList elements; | |
private HashSet<string> hashset; | |
protected override string ExpressionSymbol | |
{ | |
get { return notNot ? "IN" : "NOT IN"; } | |
} | |
public InExpression(IExpression right, ArrayList elements, bool notNot) | |
: base(right) | |
{ | |
this.notNot = notNot; | |
this.elements = elements; | |
this.hashset = new HashSet<string>(); | |
foreach(object element in elements) | |
{ | |
hashset.Add((string)element); | |
} | |
} | |
public override object Evaluate(MessageEvaluationContext message) | |
{ | |
object rvalue = Right.Evaluate(message); | |
bool answer = false; | |
if(rvalue != null && (rvalue is string)) | |
{ | |
answer = hashset.Contains((string)rvalue); | |
} | |
return notNot ? answer : !answer; | |
} | |
public override string ToString() | |
{ | |
StringBuilder answer = new StringBuilder(); | |
answer.Append(Right); | |
answer.Append(" "); | |
answer.Append(ExpressionSymbol); | |
answer.Append(" ("); | |
for(int i = 0; i < elements.Count; i++) | |
{ | |
if(i > 0) answer.Append(", "); | |
string s = (string)elements[i]; | |
answer.Append('\''); | |
for(int c = 0; c < s.Length; c++) | |
{ | |
char ch = s[c]; | |
if(ch == '\'') | |
{ | |
answer.Append(ch); | |
} | |
answer.Append(ch); | |
} | |
answer.Append('\''); | |
} | |
answer.Append(")"); | |
return answer.ToString(); | |
} | |
} | |
} |