SoapExtension.cs :  » 2.6.4-mono-.net-core » System.Web » System » Web » Services » Protocols » C# / CSharp Open Source

// 
// System.Web.Services.Protocols.SoapExtension.cs
//
// Author:
//   Tim Coleman (tim@timcoleman.com)
//
// Copyright (C) Tim Coleman, 2002
//

//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System.IO;
using System.Collections;
using System.Web.Services.Configuration;

namespace System.Web.Services.Protocols{
  public abstract class SoapExtension {

    #region Fields

    Stream stream;

    #endregion

    #region Constructors

    protected SoapExtension ()
    {
    }

    #endregion // Constructors

    #region Methods

    public virtual Stream ChainStream (Stream stream)
    {
      return stream;
    }

    public abstract object GetInitializer (Type serviceType);
    public abstract object GetInitializer (LogicalMethodInfo methodInfo, SoapExtensionAttribute attribute);
    public abstract void Initialize (object initializer);
    public abstract void ProcessMessage (SoapMessage message);


#if !TARGET_JVM
    static ArrayList[] globalExtensions;
#else
    static ArrayList[] globalExtensions {
      get {
        return (ArrayList[])AppDomain.CurrentDomain.GetData("SoapExtension.globalExtensions");
      }
      set {
        AppDomain.CurrentDomain.SetData("SoapExtension.globalExtensions", value);
      }
    }
#endif

    internal static SoapExtension[] CreateExtensionChain (SoapExtensionRuntimeConfig[] extensionConfigs)
    {
      if (extensionConfigs == null) return null;
      SoapExtension[] res = new SoapExtension [extensionConfigs.Length];
      CreateExtensionChain (extensionConfigs, res, 0);
      return res;
    }

    internal static SoapExtension[] CreateExtensionChain (SoapExtensionRuntimeConfig[] hiPrioExts, SoapExtensionRuntimeConfig[] medPrioExts, SoapExtensionRuntimeConfig[] lowPrioExts)
    {
      int len = 0;
      if (hiPrioExts != null) len += hiPrioExts.Length;
      if (medPrioExts != null) len += medPrioExts.Length;
      if (lowPrioExts != null) len += lowPrioExts.Length;
      if (len == 0) return null;

      SoapExtension[] res = new SoapExtension [len];
      int pos = 0;
      if (hiPrioExts != null) pos = CreateExtensionChain (hiPrioExts, res, pos);
      if (medPrioExts != null) pos = CreateExtensionChain (medPrioExts, res, pos);
      if (lowPrioExts != null) pos = CreateExtensionChain (lowPrioExts, res, pos);
      return res;
    }

    static int CreateExtensionChain (SoapExtensionRuntimeConfig[] extensionConfigs, SoapExtension[] destArray, int pos)
    {
      for (int n=0; n<extensionConfigs.Length; n++)
      {
        SoapExtensionRuntimeConfig econf = extensionConfigs [n];
        SoapExtension ext = (SoapExtension) Activator.CreateInstance (econf.Type);
        ext.Initialize (econf.InitializationInfo);
        destArray [pos++] = ext;
      }
      return pos;
    }

#if !MONOTOUCH
    static void InitializeGlobalExtensions ()
    {
      globalExtensions = new ArrayList[2];
#if NET_2_0 
      if (WebServicesSection.Current == null) return;

      SoapExtensionTypeElementCollection exts = WebServicesSection.Current.SoapExtensionTypes;
#else
      ArrayList exts = WSConfig.Instance.ExtensionTypes;
#endif
      if (exts == null) return;

#if NET_2_0
      foreach (SoapExtensionTypeElement econf in exts)
#else
      foreach (WSExtensionConfig econf in exts)
#endif
      {
        if (globalExtensions [(int)econf.Group] == null) globalExtensions [(int)econf.Group] = new ArrayList ();
        ArrayList destList = globalExtensions [(int) econf.Group];
        bool added = false;
        for (int n=0; n<destList.Count && !added; n++)
#if NET_2_0
          if (((SoapExtensionTypeElement)destList [n]).Priority > econf.Priority) {
#else
          if (((WSExtensionConfig)destList [n]).Priority > econf.Priority) {
#endif
            destList.Insert (n, econf);
            added = true;
          }
        if (!added) destList.Add (econf);
      }
    }

    internal static SoapExtensionRuntimeConfig[][] GetTypeExtensions (Type serviceType)
    {
      if (globalExtensions == null) InitializeGlobalExtensions();
      
      SoapExtensionRuntimeConfig[][] exts = new SoapExtensionRuntimeConfig[2][];

      for (int group = 0; group < 2; group++)
      {
        ArrayList globList = globalExtensions[group];
        if (globList == null) continue;
        exts [group] = new SoapExtensionRuntimeConfig [globList.Count];
        for (int n=0; n<globList.Count; n++)
        {
#if NET_2_0
          SoapExtensionTypeElement econf = (SoapExtensionTypeElement) globList [n];
#else
          WSExtensionConfig econf = (WSExtensionConfig) globList [n];
#endif
          SoapExtensionRuntimeConfig typeconf = new SoapExtensionRuntimeConfig ();
          typeconf.Type = econf.Type;
          SoapExtension ext = (SoapExtension) Activator.CreateInstance (econf.Type);
          typeconf.InitializationInfo = ext.GetInitializer (serviceType);
          exts [group][n] = typeconf;
        }
      }
      return exts;
    }
#endif
  
    internal static SoapExtensionRuntimeConfig[] GetMethodExtensions (LogicalMethodInfo method)
    {
      object[] ats = method.GetCustomAttributes (typeof (SoapExtensionAttribute));
      SoapExtensionRuntimeConfig[] exts = new SoapExtensionRuntimeConfig [ats.Length];
      int[] priorities = new int[ats.Length];

      for (int n=0; n<ats.Length; n++)
      {
        SoapExtensionAttribute at = (SoapExtensionAttribute) ats[n];
        SoapExtensionRuntimeConfig econf = new SoapExtensionRuntimeConfig ();
        econf.Type = at.ExtensionType;
        priorities [n] = at.Priority;
        SoapExtension ext = (SoapExtension) Activator.CreateInstance (econf.Type);
        econf.InitializationInfo = ext.GetInitializer (method, at);
        exts [n] = econf;
      }
      Array.Sort (priorities, exts);
      return exts;
    }

    internal static Stream ExecuteChainStream (SoapExtension[] extensions, Stream stream)
    {
      if (extensions == null) return stream;

      Stream newStream = stream;
      foreach (SoapExtension ext in extensions)
        newStream = ext.ChainStream (newStream);
      return newStream;
    }

    internal static void ExecuteProcessMessage(SoapExtension[] extensions, SoapMessage message, Stream stream, bool inverseOrder) 
    {
      if (extensions == null) return;

      message.InternalStream = stream;

      if (inverseOrder)
      {
        for (int n = extensions.Length-1; n >= 0; n--)
          extensions[n].ProcessMessage (message);
      }
      else
      {
        for (int n = 0; n < extensions.Length; n++)
          extensions[n].ProcessMessage (message);
      }
    }

    #endregion // Methods
  }

  internal class SoapExtensionRuntimeConfig
  {
    public Type Type;
    public int Priority;
    public object InitializationInfo;
  }
}