#region License
/*
* Copyright 2002-2004 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;
using System.Globalization;
using Spring.Util;
namespace Spring.Globalization.Formatters{
/// <summary>
/// Implementation of <see cref="IFormatter"/> that can be used to
/// format and parse floating point numbers.
/// </summary>
/// <remarks>
/// <para>
/// This formatter allows you to format and parse numbers that conform
/// to <see cref="NumberStyles.Float"/> number style (leading and trailing
/// white space, leading sign, decimal point, exponent).
/// </para>
/// </remarks>
/// <author>Aleksandar Seovic</author>
public class FloatFormatter : IFormatter
{
/// <summary>
/// Default format string.
/// </summary>
public const string DefaultFormat = "{0:F}";
private string format;
private NumberFormatInfo numberInfo;
#region Constructors
/// <summary>
/// Initializes a new instance of the <see cref="FloatFormatter"/> class,
/// using default format string of '{0:F}' and current thread's culture.
/// </summary>
public FloatFormatter() : this(DefaultFormat, CultureInfo.CurrentCulture)
{}
/// <summary>
/// Initializes a new instance of the <see cref="FloatFormatter"/> class,
/// using specified format string and current thread's culture.
/// </summary>
/// <param name="format">The format string.</param>
public FloatFormatter(string format) : this(format, CultureInfo.CurrentCulture)
{}
/// <summary>
/// Initializes a new instance of the <see cref="FloatFormatter"/> class,
/// using default format string of '{0:F}' and specified culture.
/// </summary>
/// <param name="culture">The culture.</param>
public FloatFormatter(CultureInfo culture) : this(DefaultFormat, culture)
{}
/// <summary>
/// Initializes a new instance of the <see cref="FloatFormatter"/> class,
/// using specified format string and current thread's culture.
/// </summary>
/// <param name="format">The format string.</param>
/// <param name="cultureName">The culture name.</param>
public FloatFormatter(string format, string cultureName) : this(format, CultureInfo.CreateSpecificCulture(cultureName))
{}
/// <summary>
/// Initializes a new instance of the <see cref="FloatFormatter"/> class,
/// using specified format string and culture.
/// </summary>
/// <param name="format">The format string.</param>
/// <param name="culture">The culture.</param>
public FloatFormatter(string format, CultureInfo culture)
{
this.format = format;
this.numberInfo = culture.NumberFormat;
}
#endregion
/// <summary>
/// Formats the specified float value.
/// </summary>
/// <param name="value">The value to format.</param>
/// <returns>Formatted floating point number.</returns>
/// <exception cref="ArgumentNullException">If <paramref name="value"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentException">If <paramref name="value"/> is not a number.</exception>
public string Format(object value)
{
AssertUtils.ArgumentNotNull(value, "value");
if (!NumberUtils.IsNumber(value))
{
throw new ArgumentException("FloatFormatter can only be used to format numbers.");
}
return String.Format(numberInfo, format, value);
}
/// <summary>
/// Parses the specified float value.
/// </summary>
/// <param name="value">The float value to parse.</param>
/// <returns>Parsed float value as a <see cref="Double"/>.</returns>
public object Parse(string value)
{
if (!StringUtils.HasText(value))
{
return 0d;
}
return Double.Parse(value, NumberStyles.Float, numberInfo);
}
}
}
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