source: trunk/sources/HeuristicLab.Persistence/3.3/Default/CompositeSerializers/Storable/StorableAttribute.cs @ 3199

using System;
using System.Linq;
using System.Collections.Generic;
using System.Reflection;
using System.Text;

namespace HeuristicLab.Persistence.Default.CompositeSerializers.Storable {


  /// <summary>
  /// Mark the member of a class to be considered by the <c>StorableSerializer</c>.
  /// The class must be marked as <c>[StorableClass]</c> and the
  /// <c>StorableClassType</c> should be set to <c>MarkedOnly</c> for
  /// this attribute to kick in.
  /// </summary>
  [AttributeUsage(
    AttributeTargets.Field | AttributeTargets.Property,
    AllowMultiple = false,
    Inherited = false)]    
  public class StorableAttribute : Attribute {

    /// <summary>
    /// An optional name for this member that will be used during serialization.
    /// This allows to rename a field/property in code but still be able to read
    /// the old serialized format.
    /// </summary>
    /// <value>The name.</value>
    public string Name { get; set; }


    /// <summary>
    /// A default value in case the field/property was not present or not serialized
    /// in a previous version of the class and could therefore be absent during
    /// deserialization.
    /// </summary>
    /// <value>The default value.</value>
    public object DefaultValue { get; set; }

    /// <summary>
    /// Returns a <see cref="System.String"/> that represents this instance.
    /// </summary>
    /// <returns>
    /// A <see cref="System.String"/> that represents this instance.
    /// </returns>
    public override string ToString() {
      StringBuilder sb = new StringBuilder();
      sb.Append("[Storable");
      if (Name != null || DefaultValue != null)
        sb.Append('(');
      if (Name != null) {
        sb.Append("Name = \"").Append(Name).Append("\"");
        if (DefaultValue != null)
          sb.Append(", ");
      }
      if (DefaultValue != null)
        sb.Append("DefaultValue = \"").Append(DefaultValue).Append("\"");
      if (Name != null || DefaultValue != null)
        sb.Append(')');
      sb.Append(']');
      return sb.ToString();
    }
  }
}