protected override CamlExpression VisitWhereLogicalExpression(CamlWhereLogicalExpression expression)
{
CamlLogicalOperator previousOperator = currentOperater;
using (new WhereExpressionScope(this, expression.Operator)) {
if (expression.Operator == CamlLogicalOperator.Not)
{
queryBuilder.Append(" -");
Visit(expression.Left);
}
else
{
if (previousOperator != expression.Operator)
{
queryBuilder.Append("(");
}
Visit(expression.Left);
if (expression.Operator == CamlLogicalOperator.Or)
{
queryBuilder.Append(" OR ");
}
else
{
queryBuilder.Append(" ");
}
Visit(expression.Right);
if (previousOperator != expression.Operator)
{
queryBuilder.Append(")");
}
}
}
return(expression);
}
public WhereExpressionScope(KeywordQueryCamlVisitor visitor, CamlLogicalOperator currentOperator)
{
if (!visitor.whereExpressionScope)
{
visitor.whereExpressionScope = true;
this.query = visitor.query;
this.queryBuilder = visitor.queryBuilder;
}
this.previousOperator = visitor.currentOperater;
this.visitor = visitor;
visitor.currentOperater = currentOperator == CamlLogicalOperator.Not ? previousOperator : currentOperator;
}
/// <summary> /// Called when visiting a logical comparison expression inside a <Where/> element. /// </summary> /// <param name="operatorValue">Type of logical operator.</param> /// <param name="leftExpression">Left expression.</param> /// <param name="rightExpression">Right expression.</param> protected internal abstract void VisitWhereLogicalExpression(CamlLogicalOperator operatorValue, CamlExpression leftExpression, CamlExpression rightExpression);
