95 lines
3.0 KiB
C#
95 lines
3.0 KiB
C#
//---------------------------------------------------------------------
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// <copyright file="DbSetClause.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//
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// @owner Microsoft
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// @backupOwner Microsoft
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//---------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.Data.Metadata.Edm;
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using System.Data.Common.CommandTrees.Internal;
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using System.Data.Common.Utils;
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using System.Diagnostics;
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namespace System.Data.Common.CommandTrees
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{
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/// <summary>
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/// Specifies a clause in a modification operation setting the value of a property.
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/// </summary>
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[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")]
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public sealed class DbSetClause : DbModificationClause
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{
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private DbExpression _prop;
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private DbExpression _val;
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internal DbSetClause(DbExpression targetProperty, DbExpression sourceValue)
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: base()
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{
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EntityUtil.CheckArgumentNull(targetProperty, "targetProperty");
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EntityUtil.CheckArgumentNull(sourceValue, "sourceValue");
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_prop = targetProperty;
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_val = sourceValue;
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}
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/// <summary>
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/// Gets an <see cref="DbExpression"/> that specifies the property that should be updated.
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/// </summary>
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/// <remarks>
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/// Constrained to be a <see cref="DbPropertyExpression"/>.
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/// </remarks>
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public DbExpression Property
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{
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get
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{
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return _prop;
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}
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}
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/// <summary>
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/// Gets an <see cref="DbExpression"/> that specifies the new value with which to update the property.
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/// </summary>
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/// <remarks>
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/// Constrained to be a <see cref="DbConstantExpression"/> or <see cref="DbNullExpression"/>
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/// </remarks>
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public DbExpression Value
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{
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get
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{
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return _val;
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}
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}
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internal override void DumpStructure(ExpressionDumper dumper)
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{
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dumper.Begin("DbSetClause");
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if (null != this.Property)
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{
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dumper.Dump(this.Property, "Property");
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}
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if (null != this.Value)
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{
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dumper.Dump(this.Value, "Value");
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}
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dumper.End("DbSetClause");
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}
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internal override TreeNode Print(DbExpressionVisitor<TreeNode> visitor)
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{
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TreeNode node = new TreeNode("DbSetClause");
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if (null != this.Property)
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{
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node.Children.Add(new TreeNode("Property", this.Property.Accept(visitor)));
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}
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if (null != this.Value)
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{
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node.Children.Add(new TreeNode("Value", this.Value.Accept(visitor)));
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}
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return node;
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}
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}
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}
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