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#region Copyright(c) Alexey Sadomov, Vladimir Timashkov. All Rights Reserved.
// -----------------------------------------------------------------------------
// Copyright(c) 2010 Alexey Sadomov, Vladimir Timashkov. All Rights Reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. No Trademark License - Microsoft Public License (Ms-PL) does not grant you rights to use
// authors names, logos, or trademarks.
// 2. If you distribute any portion of the software, you must retain all copyright,
// patent, trademark, and attribution notices that are present in the software.
// 3. If you distribute any portion of the software in source code form, you may do
// so only under this license by including a complete copy of Microsoft Public License (Ms-PL)
// with your distribution. If you distribute any portion of the software in compiled
// or object code form, you may only do so under a license that complies with
// Microsoft Public License (Ms-PL).
// 4. The names of the authors may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// The software is licensed "as-is." You bear the risk of using it. The authors
// give no express warranties, guarantees or conditions. You may have additional consumer
// rights under your local laws which this license cannot change. To the extent permitted
// under your local laws, the authors exclude the implied warranties of merchantability,
// fitness for a particular purpose and non-infringement.
// -----------------------------------------------------------------------------
#endregion
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Xml.Linq;
using CamlexNET.Impl.Helpers;
using CamlexNET.Impl.Operands;
using CamlexNET.Interfaces;
namespace CamlexNET.Impl
{
internal abstract class BinaryOperationBase : OperationBase
{
protected IOperand fieldRefOperand;
protected IOperand valueOperand;
protected BinaryOperationBase(IOperationResultBuilder operationResultBuilder,
IOperand fieldRefOperand, IOperand valueOperand) :
base(operationResultBuilder)
{
this.fieldRefOperand = fieldRefOperand;
this.valueOperand = valueOperand;
}
// Here we know both FieldRef operand and Value operand. So in those cases when we need knowledge from FieldRef for Value,
// or from Value to FieldRef (e.g. for native syntax we need to know the type of the Value operand in order to perform casting for FieldRef)
protected virtual Expression getFieldRefOperandExpression()
{
if (this.fieldRefOperand == null)
{
throw new NullReferenceException("fieldRefOperand");
}
if (this.valueOperand == null)
{
throw new NullReferenceException("valueOperand");
}
var fieldRefOperandExpr = this.fieldRefOperand.ToExpression();
var valueOperandExpr = this.valueOperand.ToExpression();
if (valueOperandExpr is ConstantExpression)
{
var valueOperandType = ((ConstantExpression) valueOperandExpr).Value.GetType();
return Expression.Convert(fieldRefOperandExpr, valueOperandType);
}
else if (valueOperandExpr is NewExpression)
{
var valueOperandType = valueOperandExpr.Type;
return Expression.Convert(fieldRefOperandExpr, valueOperandType);
}
else if (valueOperandExpr is MethodCallExpression)
{
// special case for DateTimeValueOperand - we should cast left value to the DateTime only if rvalue is native
if (valueOperand is DateTimeValueOperand && ((DateTimeValueOperand)valueOperand).Mode == DateTimeValueOperand.DateTimeValueMode.Native)
{
var valueOperandType = ((MethodCallExpression) valueOperandExpr).Method.ReturnType;
return Expression.Convert(fieldRefOperandExpr, valueOperandType);
}
}
return fieldRefOperandExpr;
}
protected virtual Expression getValueOperandExpression()
{
if (this.fieldRefOperand == null)
{
throw new NullReferenceException("fieldRefOperand");
}
if (this.valueOperand == null)
{
throw new NullReferenceException("valueOperand");
}
return this.valueOperand.ToExpression();
}
}
}
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