mcs/class/referencesource/System.Data.Entity/System/Data/Common/CommandTrees/DbModificationCommandTree.cs

   1 //---------------------------------------------------------------------
   2 // <copyright file="DbModificationCommandTree.cs" company="Microsoft">
   3 //      Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //
   6 // @owner  Microsoft, Microsoft
   7 // @backupOwner Microsoft
   8 //---------------------------------------------------------------------
   9
  10 using System;
  11 using System.Collections.Generic;
  12
  13 using System.Data.Metadata.Edm;
  14 using System.Data.Common.CommandTrees.Internal;
  15 using System.Data.Common.Utils;
  16 using System.Linq;
  17
  18 namespace System.Data.Common.CommandTrees
  19 {
  20     /// <summary>
  21     /// Represents a DML operation expressed as a canonical command tree
  22     /// </summary>
  23     [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")]
  24     public abstract class DbModificationCommandTree : DbCommandTree
  25     {
  26         private readonly DbExpressionBinding _target;
  27         private System.Collections.ObjectModel.ReadOnlyCollection<DbParameterReferenceExpression> _parameters;
  28
  29         internal DbModificationCommandTree(MetadataWorkspace metadata, DataSpace dataSpace, DbExpressionBinding target)
  30             : base(metadata, dataSpace)
  31         {
  32             EntityUtil.CheckArgumentNull(target, "target");
  33
  34             this._target = target;
  35         }
  36
  37         /// <summary>
  38         /// Gets the <see cref="DbExpressionBinding"/> that specifies the target table for the DML operation.
  39         /// </summary>
  40         public DbExpressionBinding Target
  41         {
  42             get
  43             {
  44                 return _target;
  45             }
  46         }
  47
  48         /// <summary>
  49         /// Returns true if this modification command returns a reader (for instance, to return server generated values)
  50         /// </summary>
  51         internal abstract bool HasReader
  52         {
  53             get;
  54         }
  55
  56         internal override IEnumerable<KeyValuePair<string, TypeUsage>> GetParameters()
  57         {
  58             if (this._parameters == null)
  59             {
  60                 this._parameters = ParameterRetriever.GetParameters(this);
  61             }
  62             return this._parameters.Select(p => new KeyValuePair<string, TypeUsage>(p.ParameterName, p.ResultType));
  63         }
  64
  65         internal override void DumpStructure(ExpressionDumper dumper)
  66         {
  67             if (this.Target != null)
  68             {
  69                 dumper.Dump(this.Target, "Target");
  70             }
  71         }
  72     }
  73 }