#region License
/*
* Copyright 2002-2007 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.ComponentModel;
using System.Globalization;
namespace Spring.Transaction.Interceptor{
/// <summary>
/// Type converter for <see cref="Spring.Transaction.Interceptor.ITransactionAttribute"/>
/// objects.
/// </summary>
/// <remarks>
/// Takes <see cref="System.String"/>s of the form
/// <p><code>PROPAGATION_NAME,ISOLATION_NAME,readOnly,timeout_NNNN,+Exception1,-Exception2</code></p>
/// <p>where only propagation code is required. For example:</p>
/// <p><code>PROPAGATION_MANDATORY,ISOLATION_DEFAULT</code></p>
/// <p>
/// The tokens can be in <strong>any</strong> order. Propagation and isolation codes
/// must use the names of the values in the <see cref="Spring.Transaction.TransactionPropagation"/>
/// enumeration. Timeout values are in seconds. If no timeout is specified, the transaction
/// manager will apply a default timeout specific to the particular transaction manager.
/// </p>
/// <p>
/// A "+" before an exception name substring indicates that transactions should commit even
/// if this exception is thrown; a "-" that they should roll back.
/// </p>
/// </remarks>
/// <author>Mark Pollack</author>
public class TransactionAttributeConverter : TypeConverter
{
/// <summary>
/// Returns whether this converter can convert an object of the given type to an ITransactionAttribute, using the specified context.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"></see> that provides a format context.</param>
/// <param name="sourceType">A <see cref="T:System.Type"></see> that represents the type you want to convert from.</param>
/// <returns>
/// true if this converter can perform the conversion; otherwise, false.
/// </returns>
public override bool CanConvertFrom(
ITypeDescriptorContext context, Type sourceType)
{
if (sourceType == typeof (string))
{
return true;
}
return base.CanConvertFrom(context, sourceType);
}
/// <summary>
/// Converts from string to ITransactionAttribute
/// </summary>
/// <param name="context">The context.</param>
/// <param name="culture">The culture.</param>
/// <param name="val">The string value to convert</param>
/// <returns>An ITransactionAttribute instance</returns>
public override object ConvertFrom(
ITypeDescriptorContext context, CultureInfo culture, object val)
{
if (val is string)
{
string value = val as string;
TransactionAttributeEditor editor = new TransactionAttributeEditor();
editor.SetAsText(value);
return editor.Value;
}
return base.ConvertFrom(context, culture, val);
}
}
}
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