DbQueryCommandTree.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / ndp / fx / src / DataEntity / System / Data / Common / CommandTrees / DbQueryCommandTree.cs / 2 / DbQueryCommandTree.cs
                        
                        
                             
//----------------------------------------------------------------------
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
//  
//
// @owner  [....], [....] 
//--------------------------------------------------------------------- 

using System; 
using System.Collections.Generic;

using System.Data.Metadata.Edm;
using System.Data.Common.CommandTrees.Internal; 

namespace System.Data.Common.CommandTrees 
{ 
    /// 
    /// Represents a query operation expressed as a canonical command tree. 
    /// 
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")]
    public sealed class DbQueryCommandTree : DbCommandTree
    { 
        private ExpressionLink _query;
 
        ///  
        /// Gets or sets an  that defines the logic of the query operation.
        ///  
        /// The expression is null
        /// The expression is associated with a different command tree
        public DbExpression Query
        { 
            get
            { 
                return _query.Expression; 
            }
 
            /*CQT_PUBLIC_API(*/internal/*)*/ set
            {
                using (new EntityBid.ScopeAuto(" %d#", this.ObjectId))
                { 
                    EntityBid.Trace(" %d#, value=%d#, %d{cqt.DbExpressionKind}\n", this.ObjectId, DbExpression.GetObjectId(value), DbExpression.GetExpressionKind(value));
                    _query.Expression = value; 
                } 
            }
        } 

        /// 
        /// Constructs a new DbQueryCommandTree that uses the specified metadata workspace.
        ///  
        /// The metadata workspace that the command tree should use.
        /// The logical 'space' that metadata in the expressions used in this command tree must belong to. 
        ///  or  is null 
        ///  does not represent a valid data space
        /*CQT_PUBLIC_API(*/internal/*)*/ DbQueryCommandTree(MetadataWorkspace metadata, DataSpace dataSpace) : base(metadata, dataSpace) 
        {
            using (new EntityBid.ScopeAuto(" %d#", this.ObjectId))
            {
                _query = new ExpressionLink("Query", this); 
            }
        } 
 
        /// 
        /// Clones this command tree. This operation creates a new DbQueryCommandTree for which each expression property value is a clone of the corresponding property of this command tree. 
        /// 
        /// The cloned command tree
        /*CQT_PUBLIC_API(*/internal/*)*/ DbQueryCommandTree Clone()
        { 
            using (new EntityBid.ScopeAuto(" %d#", this.ObjectId))
            { 
                DbQueryCommandTree newTree = new DbQueryCommandTree( 
                    this.MetadataWorkspace,
                    this.DataSpace 
                );

                this.CopyParametersTo(newTree);
 
                if (this.Query != null)
                { 
                    newTree.Query = ExpressionCopier.Copy(newTree, this.Query); 
                }
 
                return newTree;
            }
        }
 
        internal override DbCommandTreeKind CommandTreeKind
        { 
            get { return DbCommandTreeKind.Query; } 
        }
 
        internal override void DumpStructure(ExpressionDumper dumper)
        {
            if (this.Query != null)
            { 
                dumper.Dump(this.Query, "Query");
            } 
        } 

        internal override string PrintTree(ExpressionPrinter printer) 
        {
            return printer.Print(this);
        }
 
        internal override void Replace(ExpressionReplacer replacer)
        { 
            using (new EntityBid.ScopeAuto(" %d#", this.ObjectId)) 
            {
                if (this.Query != null) 
                {
                    DbExpression newQuery = replacer.Replace(this.Query);
                    if (!object.ReferenceEquals(newQuery, this.Query))
                    { 
                        this.Query = newQuery;
                    } 
                } 
            }
        } 

        internal override void Validate(System.Data.Common.CommandTrees.Internal.Validator v)
        {
            using (new EntityBid.ScopeAuto(" %d#", this.ObjectId)) 
            {
                v.Validate(this); 
            } 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
 
//----------------------------------------------------------------------
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
//  
//
// @owner  [....], [....] 
//--------------------------------------------------------------------- 

using System; 
using System.Collections.Generic;

using System.Data.Metadata.Edm;
using System.Data.Common.CommandTrees.Internal; 

namespace System.Data.Common.CommandTrees 
{ 
    /// 
    /// Represents a query operation expressed as a canonical command tree. 
    /// 
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")]
    public sealed class DbQueryCommandTree : DbCommandTree
    { 
        private ExpressionLink _query;
 
        ///  
        /// Gets or sets an  that defines the logic of the query operation.
        ///  
        /// The expression is null
        /// The expression is associated with a different command tree
        public DbExpression Query
        { 
            get
            { 
                return _query.Expression; 
            }
 
            /*CQT_PUBLIC_API(*/internal/*)*/ set
            {
                using (new EntityBid.ScopeAuto(" %d#", this.ObjectId))
                { 
                    EntityBid.Trace(" %d#, value=%d#, %d{cqt.DbExpressionKind}\n", this.ObjectId, DbExpression.GetObjectId(value), DbExpression.GetExpressionKind(value));
                    _query.Expression = value; 
                } 
            }
        } 

        /// 
        /// Constructs a new DbQueryCommandTree that uses the specified metadata workspace.
        ///  
        /// The metadata workspace that the command tree should use.
        /// The logical 'space' that metadata in the expressions used in this command tree must belong to. 
        ///  or  is null 
        ///  does not represent a valid data space
        /*CQT_PUBLIC_API(*/internal/*)*/ DbQueryCommandTree(MetadataWorkspace metadata, DataSpace dataSpace) : base(metadata, dataSpace) 
        {
            using (new EntityBid.ScopeAuto(" %d#", this.ObjectId))
            {
                _query = new ExpressionLink("Query", this); 
            }
        } 
 
        /// 
        /// Clones this command tree. This operation creates a new DbQueryCommandTree for which each expression property value is a clone of the corresponding property of this command tree. 
        /// 
        /// The cloned command tree
        /*CQT_PUBLIC_API(*/internal/*)*/ DbQueryCommandTree Clone()
        { 
            using (new EntityBid.ScopeAuto(" %d#", this.ObjectId))
            { 
                DbQueryCommandTree newTree = new DbQueryCommandTree( 
                    this.MetadataWorkspace,
                    this.DataSpace 
                );

                this.CopyParametersTo(newTree);
 
                if (this.Query != null)
                { 
                    newTree.Query = ExpressionCopier.Copy(newTree, this.Query); 
                }
 
                return newTree;
            }
        }
 
        internal override DbCommandTreeKind CommandTreeKind
        { 
            get { return DbCommandTreeKind.Query; } 
        }
 
        internal override void DumpStructure(ExpressionDumper dumper)
        {
            if (this.Query != null)
            { 
                dumper.Dump(this.Query, "Query");
            } 
        } 

        internal override string PrintTree(ExpressionPrinter printer) 
        {
            return printer.Print(this);
        }
 
        internal override void Replace(ExpressionReplacer replacer)
        { 
            using (new EntityBid.ScopeAuto(" %d#", this.ObjectId)) 
            {
                if (this.Query != null) 
                {
                    DbExpression newQuery = replacer.Replace(this.Query);
                    if (!object.ReferenceEquals(newQuery, this.Query))
                    { 
                        this.Query = newQuery;
                    } 
                } 
            }
        } 

        internal override void Validate(System.Data.Common.CommandTrees.Internal.Validator v)
        {
            using (new EntityBid.ScopeAuto(" %d#", this.ObjectId)) 
            {
                v.Validate(this); 
            } 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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DbQueryCommandTree.cs source code in C# .NET

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