/// <summary>
/// Creates a <see cref="FieldSelectorExpression"/> from a <see cref="MethodCallExpression"/>.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="reportedSignatureSupport">A component outlining the supported expression structure of this provider.</param>
/// <returns></returns>
/// <remarks></remarks>
public override FieldSelectorExpression CreateFieldSelector(MethodCallExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
switch (expression.Method.Name)
{
case "Field":
// This is an extension method for the RenderViewModel so the first argument is the extended object
return new FieldSelectorExpression(((ConstantExpression)expression.Arguments[1]).Value.ToString());
case "StringField":
// This is an extension method for the RenderViewModel so the first argument is the extended object
return new FieldSelectorExpression(((ConstantExpression)expression.Arguments[1]).Value.ToString());
case "NumberField":
// This is an extension method for the RenderViewModel so the first argument is the extended object
return new FieldSelectorExpression(((ConstantExpression)expression.Arguments[1]).Value.ToString());
case "BooleanField":
// This is an extension method for the RenderViewModel so the first argument is the extended object
return new FieldSelectorExpression(((ConstantExpression)expression.Arguments[1]).Value.ToString());
case "get_Item":
// This is the default accessor of a Dictionary, so check if the parent object is supported too
if (ExpressionHelper.IsMember(expression.Object) && IsSupportedMember(expression.Object as MemberExpression).SignatureSupportType != SignatureSupportType.NotSupported)
return new FieldSelectorExpression(((ConstantExpression) expression.Arguments[0]).Value.ToString());
break;
}
return base.CreateFieldSelector(expression, reportedSignatureSupport);
}
/// <summary>
/// Creates the field selector.
/// </summary>
/// <param name="fieldame">The fieldame.</param>
/// <param name="innerFieldName">Name of the inner field.</param>
/// <param name="reportedSignatureSupport">The reported signature support.</param>
/// <returns></returns>
public virtual FieldSelectorExpression CreateFieldSelector(string fieldame, string innerFieldName, BindingSignatureSupport reportedSignatureSupport)
{
if(!string.IsNullOrWhiteSpace(innerFieldName))
return new FieldSelectorExpression(innerFieldName);
return new FieldSelectorExpression(fieldame);
}
/// <summary>
/// Creates a <see cref="FieldSelectorExpression"/> from a <see cref="MemberExpression"/>.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="reportedSignatureSupport">A component outlining the supported expression structure of this provider.</param>
/// <returns></returns>
/// <remarks></remarks>
public virtual FieldSelectorExpression CreateFieldSelector(MemberExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
var memberParent = expression.Expression as MemberExpression;
if (memberParent != null)
return CreateFieldSelector(memberParent.Member.Name, expression.Member.Name, reportedSignatureSupport);
return CreateFieldSelector(expression.Member.Name, null, reportedSignatureSupport);
}
/// <summary>
/// Creates a field selector.
/// </summary>
/// <param name="fieldName">Name of the field.</param>
/// <param name="innerFieldName">Name of the inner field.</param>
/// <param name="reportedSignatureSupport">The reported signature support.</param>
/// <returns></returns>
public override FieldSelectorExpression CreateFieldSelector(string fieldName, string innerFieldName, BindingSignatureSupport reportedSignatureSupport)
{
switch (fieldName)
{
case "Name":
return new FieldSelectorExpression("system-internal-node-name", fieldName);
case "UrlName":
return new FieldSelectorExpression("system-internal-node-name", fieldName);
case "Template":
case "TemplateId":
case "CurrentTemplate":
return new FieldSelectorExpression("system-internal-selected-template", "TemplateId");
default:
return base.CreateFieldSelector(fieldName, innerFieldName, reportedSignatureSupport);
}
}
/// <summary>
/// Creates a <see cref="FieldSelectorExpression"/> from a <see cref="MethodCallExpression"/>.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="reportedSignatureSupport">A component outlining the supported expression structure of this provider.</param>
/// <returns></returns>
/// <remarks></remarks>
public override FieldSelectorExpression CreateFieldSelector(MethodCallExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
switch (expression.Method.Name)
{
case "Field":
// This is an extension method for the RenderViewModel so the first argument is the extended object
return new FieldSelectorExpression(((ConstantExpression)expression.Arguments[1]).Value.ToString());
case "get_Item":
// This is the default accessor of a Dictionary, so check if the parent object is supported too
if (ExpressionHelper.IsMember(expression.Object) && IsSupportedMember(expression.Object as MemberExpression).SignatureSupportType != SignatureSupportType.NotSupported)
return new FieldSelectorExpression(((ConstantExpression) expression.Arguments[0]).Value.ToString());
break;
}
// Add support for dynamic expressions using an intermediary set of "fake" methods on DynamicMemberMetadata
if (expression.Method == DynamicMemberMetadata.GetMemberMethod)
{
// The first argument is the field name
return new FieldSelectorExpression(((ConstantExpression)expression.Arguments[0]).Value.ToString());
}
return base.CreateFieldSelector(expression, reportedSignatureSupport);
}
/// <summary>
/// Creates a <see cref="FieldSelectorExpression"/> from a <see cref="MethodCallExpression"/>.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="reportedSignatureSupport">A component outlining the supported expression structure of this provider.</param>
/// <returns></returns>
/// <remarks></remarks>
public override FieldSelectorExpression CreateFieldSelector(MethodCallExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
switch (expression.Method.Name)
{
case "Attribute":
// This is an extension method for the Persistence model so the first argument is the extended object
if (expression.Arguments.Count == 3)
{
//if there are 3 arguments, then we are selecting a field by name with a value key
return new FieldSelectorExpression(
((ConstantExpression) expression.Arguments[1]).Value.ToString(),
((ConstantExpression) expression.Arguments[2]).Value.ToString());
}
if (expression.Arguments.Count == 2)
{
//if there are 2 arguments, then we are selecting a field only by name regardless of the value key
return new FieldSelectorExpression(((ConstantExpression)expression.Arguments[1]).Value.ToString());
}
break;
case "get_Item":
// This is the default accessor of a Dictionary, so check if the parent object is supported too
if (ExpressionHelper.IsMember(expression.Object) && IsSupportedMember(expression.Object as MemberExpression).SignatureSupportType != SignatureSupportType.NotSupported)
return new FieldSelectorExpression(((ConstantExpression)expression.Arguments[0]).Value.ToString());
// There are two dictionaries on this model, the TypedAttributeCollection and its child TypedAttributeValueCollection.
// Make sure we're getting the field name from the TypedAttributeCollection indexer. To do this, access the MemberExpression
// "one up the chain" and recurse back into this method.
if (ExpressionHelper.IsMember(expression.Object) && ExpressionHelper.IsMethod(((MemberExpression)expression.Object).Expression))
return CreateFieldSelector(((MemberExpression)expression.Object).Expression as MethodCallExpression, reportedSignatureSupport);
break;
}
return base.CreateFieldSelector(expression, reportedSignatureSupport);
}
private static void UpdateValuePredicateType(BindingSignatureSupport signatureSupport, BinaryExpression binaryExpression)
{
// Only modify the ValuePredicateType if it already is "Equals" or "Empty". This is pending a refactor
// of BindingSignatureSupport to include a negation property and the removal of NotEquals
if (signatureSupport.NodeType != ValuePredicateType.Equal && signatureSupport.NodeType != ValuePredicateType.Empty) return;
// First check the NodeType. Binaries joined with "!= true" will have a NodeType of NotEqual
switch (binaryExpression.NodeType)
{
case ExpressionType.Equal:
signatureSupport.NodeType = ValuePredicateType.Equal;
break;
case ExpressionType.NotEqual:
signatureSupport.NodeType = ValuePredicateType.NotEqual;
break;
case ExpressionType.GreaterThan:
signatureSupport.NodeType = ValuePredicateType.GreaterThan;
break;
case ExpressionType.GreaterThanOrEqual:
signatureSupport.NodeType = ValuePredicateType.GreaterThanOrEqual;
break;
case ExpressionType.LessThan:
signatureSupport.NodeType = ValuePredicateType.LessThan;
break;
case ExpressionType.LessThanOrEqual:
signatureSupport.NodeType = ValuePredicateType.LessThanOrEqual;
break;
}
// Then check the Method, which might be an operator
if (binaryExpression.Method != null)
switch (binaryExpression.Method.Name)
{
case "op_Inequality":
signatureSupport.NodeType = ValuePredicateType.NotEqual;
break;
}
}
/// <summary>
/// Creates a <see cref="FieldValueExpression"/> from a <see cref="MethodCallExpression"/>.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="reportedSignatureSupport">A component outlining the supported expression structure of this provider.</param>
/// <returns></returns>
/// <remarks></remarks>
public virtual FieldValueExpression CreateFieldValueExpression(MethodCallExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
return(new FieldValueExpression(reportedSignatureSupport.NodeType, ExpressionHelper.GetFirstValueFromArguments(expression.Arguments)));
}
public virtual SchemaSelectorExpression CreateSchemaSelector(MemberExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
return(new SchemaSelectorExpression(expression.Member.Name));
}
/// <summary>
/// Creates a <see cref="FieldSelectorExpression"/> from a <see cref="MethodCallExpression"/>.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="reportedSignatureSupport">A component outlining the supported expression structure of this provider.</param>
/// <returns></returns>
/// <remarks></remarks>
public virtual FieldSelectorExpression CreateFieldSelector(MethodCallExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
return(new FieldSelectorExpression(expression.Method.Name));
}
/// <summary>
/// Creates a <see cref="FieldValueExpression"/> from a <see cref="MethodCallExpression"/>.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="reportedSignatureSupport">A component outlining the supported expression structure of this provider.</param>
/// <returns></returns>
/// <remarks></remarks>
public virtual FieldValueExpression CreateFieldValueExpression(MethodCallExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
return new FieldValueExpression(reportedSignatureSupport.NodeType, ExpressionHelper.GetFirstValueFromArguments(expression.Arguments));
}
public virtual SchemaSelectorExpression CreateSchemaSelector(MemberExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
return new SchemaSelectorExpression(expression.Member.Name);
}
/// <summary>
/// Creates a <see cref="FieldSelectorExpression"/> from a <see cref="MethodCallExpression"/>.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="reportedSignatureSupport">A component outlining the supported expression structure of this provider.</param>
/// <returns></returns>
/// <remarks></remarks>
public virtual FieldSelectorExpression CreateFieldSelector(MethodCallExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
return CreateFieldSelector(expression.Method.Name, null, reportedSignatureSupport);
}
/// <summary>
/// Creates a <see cref="FieldSelectorExpression"/> from a <see cref="MethodCallExpression"/>.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="reportedSignatureSupport">A component outlining the supported expression structure of this provider.</param>
/// <returns></returns>
/// <remarks></remarks>
public override FieldSelectorExpression CreateFieldSelector(MethodCallExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
switch (expression.Method.Name)
{
case "Field":
// This is an extension method for the RenderViewModel so the first argument is the extended object
return(new FieldSelectorExpression(((ConstantExpression)expression.Arguments[1]).Value.ToString()));
case "get_Item":
// This is the default accessor of a Dictionary, so check if the parent object is supported too
if (ExpressionHelper.IsMember(expression.Object) && IsSupportedMember(expression.Object as MemberExpression).SignatureSupportType != SignatureSupportType.NotSupported)
{
return(new FieldSelectorExpression(((ConstantExpression)expression.Arguments[0]).Value.ToString()));
}
break;
}
// Add support for dynamic expressions using an intermediary set of "fake" methods on DynamicMemberMetadata
if (expression.Method == DynamicMemberMetadata.GetMemberMethod)
{
// The first argument is the field name
return(new FieldSelectorExpression(((ConstantExpression)expression.Arguments[0]).Value.ToString()));
}
return(base.CreateFieldSelector(expression, reportedSignatureSupport));
}
private static SchemaSelectorExpression GetSchemaSelector(Expression left, AbstractQueryStructureBinder structureBinder, BindingSignatureSupport bindingSignatureSupport)
{
switch (bindingSignatureSupport.SignatureSupportType)
{
case SignatureSupportType.SupportedAsSchemaAlias:
if (ExpressionHelper.IsMember(left))
return structureBinder.CreateSchemaSelector(left as MemberExpression, bindingSignatureSupport);
else if (ExpressionHelper.IsMethod(left))
return structureBinder.CreateSchemaSelector(left as MethodCallExpression, bindingSignatureSupport);
break;
}
return null;
}
/// <summary>
/// Gets a <see cref="FieldSelectorExpression"/> from an expression it the <paramref name="bindingSignatureSupport"/> identifies it as supported.
/// </summary>
/// <param name="left">The left.</param>
/// <param name="structureBinder">The structure binder.</param>
/// <param name="bindingSignatureSupport">The binding signature support.</param>
/// <returns></returns>
/// <remarks></remarks>
public static FieldSelectorExpression GetFieldSelector(Expression left, AbstractQueryStructureBinder structureBinder, BindingSignatureSupport bindingSignatureSupport)
{
switch (bindingSignatureSupport.SignatureSupportType)
{
case SignatureSupportType.SupportedAsFieldName:
if (ExpressionHelper.IsMember(left))
return structureBinder.CreateFieldSelector(left as MemberExpression, bindingSignatureSupport);
else if (ExpressionHelper.IsMethod(left))
return structureBinder.CreateFieldSelector(left as MethodCallExpression, bindingSignatureSupport);
break;
}
return null;
}
/// <summary>
/// Creates a <see cref="FieldSelectorExpression"/> from a <see cref="MethodCallExpression"/>.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="reportedSignatureSupport">A component outlining the supported expression structure of this provider.</param>
/// <returns></returns>
/// <remarks></remarks>
public override FieldSelectorExpression CreateFieldSelector(MethodCallExpression expression, BindingSignatureSupport reportedSignatureSupport)
{
// If the method has parameters, look at the attributes of each parameter to see if they map to a field name
string foundField = null;
string foundSubField = null;
var parameterInfos = expression.Method.GetParameters();
for (int index = 0; index < parameterInfos.Length; index++)
{
if (foundField == null)
{
var parameterInfo = parameterInfos[index];
var attribs =
parameterInfo.GetCustomAttributes(typeof (MapsToAliasForQueryingAttribute), true).OfType
<MapsToAliasForQueryingAttribute>()
.FirstOrDefault();
if (attribs != null)
{
var arg = expression.Arguments.ToArray()[index] as ConstantExpression;
if (arg != null)
{
foundField = arg.Value.ToString();
}
}
}
if (foundSubField == null)
{
var parameterInfo = parameterInfos[index];
var attribs =
parameterInfo.GetCustomAttributes(typeof(MapsToInnerAliasForQueryingAttribute), true).OfType
<MapsToInnerAliasForQueryingAttribute>()
.FirstOrDefault();
if (attribs != null)
{
var arg = expression.Arguments.ToArray()[index] as ConstantExpression;
if (arg != null)
{
foundSubField = arg.Value.ToString();
}
}
}
}
if (foundField != null)
{
if (foundSubField != null)
{
return new FieldSelectorExpression(foundField, foundSubField);
}
return new FieldSelectorExpression(foundField);
}
switch (expression.Method.Name)
{
case "Field":
// This is an extension method for the RenderViewModel so the first argument is the extended object
return new FieldSelectorExpression(((ConstantExpression)expression.Arguments[1]).Value.ToString());
case "get_Item":
// This is the default accessor of a Dictionary, so check if the parent object is supported too
// and also allow for dictionary-of-dictionary
// First check explicit mappings e.g. TypedAttribute[index].Values[subindex]
var containerExpr = expression.Object as MemberExpression;
if (expression.Method.GetCustomAttributes(typeof(MapsToInnerAliasForQueryingAttribute), true).Any())
{
var innerFieldExpression = expression.Arguments[0] as ConstantExpression;
if (innerFieldExpression != null)
{
foundSubField = innerFieldExpression.Value.ToString();
}
}
if (containerExpr != null)
{
var callExpression = containerExpr.Expression as MethodCallExpression;
if (callExpression != null)
{
if (containerExpr.Member.GetCustomAttributes(typeof(MapsToInnerAliasForQueryingAttribute), true).Any())
{
var innerFieldExpression = callExpression.Arguments[0] as ConstantExpression;
if (innerFieldExpression != null)
{
foundField = innerFieldExpression.Value.ToString();
}
}
}
}
if (foundField != null)
{
if (foundSubField != null)
{
return new FieldSelectorExpression(foundField, foundSubField);
}
return new FieldSelectorExpression(foundField);
}
if (ExpressionHelper.IsMember(expression.Object) && IsSupportedMember(containerExpr).SignatureSupportType != SignatureSupportType.NotSupported)
return new FieldSelectorExpression(((ConstantExpression) expression.Arguments[0]).Value.ToString());
break;
}
// Add support for dynamic expressions using an intermediary set of "fake" methods on DynamicMemberMetadata
if (expression.Method == DynamicMemberMetadata.GetMemberMethod)
{
// The first argument is the field name
return CreateFieldSelector(((ConstantExpression)expression.Arguments[0]).Value.ToString(), null, reportedSignatureSupport);
}
return base.CreateFieldSelector(expression, reportedSignatureSupport);
}
