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//---------------------------------------------------------------------
// <copyright file="CaseStatementProjectedSlot.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
using System.Data.Mapping.ViewGeneration.CqlGeneration;
using System.Text;
using System.Collections.Generic;
using System.Data.Common.CommandTrees;
using System.Data.Common.CommandTrees.ExpressionBuilder;
namespace System.Data.Mapping.ViewGeneration.Structures
{
/// <summary>
/// This class is just a wrapper over case statements so that we don't pollute the <see cref="CaseStatement"/> class itself.
/// </summary>
internal sealed class CaseStatementProjectedSlot : ProjectedSlot
{
#region Constructor
/// <summary>
/// Creates a slot for <paramref name="statement"/>.
/// </summary>
internal CaseStatementProjectedSlot(CaseStatement statement, IEnumerable<WithRelationship> withRelationships)
{
m_caseStatement = statement;
m_withRelationships = withRelationships;
}
#endregion
#region Fields
/// <summary>
/// The actual case statement.
/// </summary>
private readonly CaseStatement m_caseStatement;
private readonly IEnumerable<WithRelationship> m_withRelationships;
#endregion
#region Methods
/// <summary>
/// Creates new <see cref="ProjectedSlot"/> that is qualified with <paramref name="block"/>.CqlAlias.
/// If current slot is composite (such as <see cref="CaseStatementProjectedSlot"/>, then this method recursively qualifies all parts
/// and returns a new deeply qualified slot (as opposed to <see cref="CqlBlock.QualifySlotWithBlockAlias"/>).
/// </summary>
internal override ProjectedSlot DeepQualify(CqlBlock block)
{
CaseStatement newStatement = m_caseStatement.DeepQualify(block);
return new CaseStatementProjectedSlot(newStatement, null);
}
internal override StringBuilder AsEsql(StringBuilder builder, MemberPath outputMember, string blockAlias, int indentLevel)
{
m_caseStatement.AsEsql(builder, m_withRelationships, blockAlias, indentLevel);
return builder;
}
internal override DbExpression AsCqt(DbExpression row, MemberPath outputMember)
{
return m_caseStatement.AsCqt(row, m_withRelationships);
}
internal override void ToCompactString(StringBuilder builder)
{
m_caseStatement.ToCompactString(builder);
}
#endregion
}
}
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