#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 integer numbers.
/// </summary>
/// <remarks>
/// <para>
/// This formatter allows you to format and parse numbers that conform
/// to <see cref="NumberStyles.Integer"/> number style (leading and trailing
/// white space, leading sign).
/// </para>
/// </remarks>
/// <author>Aleksandar Seovic</author>
public class IntegerFormatter : IFormatter
{
private string format = "{0:D}";
#region Constructors
/// <summary>
/// Initializes a new instance of the <see cref="IntegerFormatter"/> class,
/// using default format string of '{0:D}'.
/// </summary>
public IntegerFormatter()
{}
/// <summary>
/// Initializes a new instance of the <see cref="IntegerFormatter"/> class,
/// using specified format string.
/// </summary>
public IntegerFormatter(string format)
{
this.format = format;
}
#endregion
/// <summary>
/// Formats the specified integer value.
/// </summary>
/// <param name="value">The value to format.</param>
/// <returns>Formatted integer number.</returns>
/// <exception cref="ArgumentNullException">If <paramref name="value"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentException">If <paramref name="value"/> is not an integer number.</exception>
public string Format(object value)
{
AssertUtils.ArgumentNotNull(value, "value");
if (!NumberUtils.IsInteger(value))
{
throw new ArgumentException("IntegerFormatter can only be used to format integer numbers.");
}
return String.Format(format, value);
}
/// <summary>
/// Parses the specified integer value.
/// </summary>
/// <param name="value">The integer value to parse.</param>
/// <returns>Parsed number value as a <see cref="Int32"/>.</returns>
public object Parse(string value)
{
if (!StringUtils.HasText(value))
{
return 0;
}
return Int32.Parse(value, NumberStyles.Integer);
}
}
}
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