#region License
/*
* Copyright 2002-2005 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 System;
using System.ComponentModel;
using System.Globalization;
using Spring.Core.IO;
#endregion
namespace Spring.Core.TypeConversion{
/// <summary>
/// Converter for <see cref="System.IO.Stream"/> to directly set a
/// <see cref="System.IO.Stream"/> property.
/// </summary>
/// <author>Jurgen Hoeller</author>
/// <author>Mark Pollack (.NET)</author>
public class StreamConverter : TypeConverter
{
private ResourceConverter resourceConverter;
#region Constructors
/// <summary>
/// Create a new StreamConverter using the default
/// <see cref="Spring.Core.IO.ResourceConverter"/>.
/// </summary>
public StreamConverter() : this (new ResourceConverter())
{
}
/// <summary>
/// Create a new StreamConverter using the given
/// <see cref="Spring.Core.IO.ResourceConverter"/>.
/// </summary>
/// <param name="resourceConverter">
/// The <see cref="Spring.Core.IO.ResourceConverter"/> to use.</param>
public StreamConverter(ResourceConverter resourceConverter)
{
this.resourceConverter = resourceConverter == null
? new ResourceConverter() : resourceConverter;
}
#endregion
#region Methods
/// <summary>
/// Returns whether this converter can convert an object of one
/// <see cref="System.Type"/> to a <see cref="System.IO.Stream"/>
/// </summary>
/// <remarks>
/// <p>
/// Currently only supports conversion from a
/// <see cref="System.String"/> instance.
/// </p>
/// </remarks>
/// <param name="context">
/// A <see cref="System.ComponentModel.ITypeDescriptorContext"/>
/// that provides a format context.
/// </param>
/// <param name="sourceType">
/// A <see cref="System.Type"/> that represents the
/// <see cref="System.Type"/> you want to convert from.
/// </param>
/// <returns>True if the conversion is possible.</returns>
public override bool CanConvertFrom (
ITypeDescriptorContext context,
Type sourceType)
{
if (sourceType == typeof (string))
{
return true;
}
return base.CanConvertFrom (context, sourceType);
}
/// <summary>
/// Convert from a string value to a <see cref="System.IO.Stream"/> instance.
/// </summary>
/// <param name="context">
/// A <see cref="System.ComponentModel.ITypeDescriptorContext"/>
/// that provides a format context.
/// </param>
/// <param name="culture">
/// The <see cref="System.Globalization.CultureInfo"/> to use
/// as the current culture.
/// </param>
/// <param name="val">
/// The value that is to be converted.
/// </param>
/// <returns>
/// A <see cref="System.IO.Stream"/> if successful.
/// </returns>
public override object ConvertFrom (
ITypeDescriptorContext context,
CultureInfo culture, object val)
{
if (val is string)
{
IResource resource = (IResource) resourceConverter.ConvertFrom(context, culture, val);
return resource.InputStream;
}
return base.ConvertFrom (context, culture, val);
}
#endregion
}
}
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