/*
* 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.
*/
using System;
namespace Contrib.Regex
{
///
/// C# Regex based implementation of .
///
/// http://www.java2s.com/Open-Source/Java-Document/Net/lucene-connector/org/apache/lucene/search/regex/JavaUtilRegexCapabilities.java.htm
public class CSharpRegexCapabilities : IRegexCapabilities, IEquatable
{
private System.Text.RegularExpressions.Regex _rPattern;
///
/// Called by the constructor of allowing implementations to cache
/// a compiled version of the regular expression pattern.
///
/// regular expression pattern
public void Compile(string pattern)
{
_rPattern = new System.Text.RegularExpressions.Regex(pattern,
System.Text.RegularExpressions.RegexOptions.Compiled);
}
///
/// True on match.
///
/// text to match
/// true on match
public bool Match(string s)
{
return _rPattern.IsMatch(s);
}
///
/// A wise prefix implementation can reduce the term enumeration (and thus performance)
/// of RegexQuery dramatically.
///
/// static non-regex prefix of the pattern last passed to .
/// May return null
public string Prefix()
{
return null;
}
///
/// Indicates whether the current object is equal to another object of the same type.
///
///
/// true if the current object is equal to the parameter; otherwise, false.
///
/// An object to compare with this object
public bool Equals(CSharpRegexCapabilities other)
{
if (other == null) return false;
if (this == other) return true;
if (_rPattern != null ? !_rPattern.Equals(other._rPattern) : other._rPattern != null)
return false;
return true;
}
public override bool Equals(object obj)
{
if (obj as CSharpRegexCapabilities == null) return false;
return Equals((CSharpRegexCapabilities) obj);
}
public override int GetHashCode()
{
return (_rPattern != null ? _rPattern.GetHashCode() : 0);
}
}
}