#region License
/*
* Copyright 2002-2008 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
#region Imports
using Spring.Util;
#endregion
namespace Spring.Globalization.Formatters{
/// <summary>
/// Replaces input strings with a given default value,
/// if they are null or contain whitespaces only,
/// </summary>
/// <author>Erich Eichinger</author>
public class HasTextFilteringFormatter : FilteringFormatter
{
private readonly string _defaultValue;
///<summary>
/// Creates a new instance of this HasTextFilteringFormatter using null as default value.
///</summary>
///<param name="underlyingFormatter">an optional underlying formatter</param>
/// <remarks>
/// If no underlying formatter is specified, the values
/// get passed through "as-is" after being filtered
/// </remarks>
public HasTextFilteringFormatter(IFormatter underlyingFormatter)
: this(null, underlyingFormatter)
{
}
///<summary>
/// Creates a new instance of this HasTextFilteringFormatter.
///</summary>
/// <param name="defaultValue">the default value to be returned, if input text doesn't contain text</param>
///<param name="underlyingFormatter">an optional underlying formatter</param>
/// <remarks>
/// If no underlying formatter is specified, the values
/// get passed through "as-is" after being filtered
/// </remarks>
public HasTextFilteringFormatter(string defaultValue, IFormatter underlyingFormatter)
: base(underlyingFormatter)
{
_defaultValue = defaultValue;
}
/// <summary>
/// If value contains no text, it will be replaced by a defaultValue.
/// </summary>
protected override string FilterValueToParse(string value)
{
if (!StringUtils.HasText(value))
{
value = _defaultValue;
}
return value;
}
}
}
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