public PredicateBuilder(Expression sourceExpression, ExpressionOperator @operator, object value, PredicateBuilderConfiguration configuration = null)
{
Configuration = configuration ?? PredicateBuilderConfiguration.Default;
Expression = sourceExpression;
Operator = @operator;
Value = value;
EffectiveType = Nullable.GetUnderlyingType(Expression.Type) ?? Expression.Type;
IsNullableType = EffectiveType != Expression.Type;
IsNullable = IsNullableType || !EffectiveType.IsValueType;
DataType = GetDataType(Expression.Type);
}
public ExpressionNodeVisitorInput(ParameterExpression itParameterExpression, PredicateBuilderConfiguration defaultConfiguration = null, IDictionary <string, PredicateBuilderConfiguration> configurations = null)
{
ItParameterExpression = itParameterExpression;
DefaultConfiguration = defaultConfiguration ?? PredicateBuilderConfiguration.Default;
if (configurations != null)
{
Configurations = new ReadOnlyDictionary <string, PredicateBuilderConfiguration>(configurations);
}
else
{
Configurations = new Dictionary <string, PredicateBuilderConfiguration>();
}
}
public Expression <Func <T, bool> > VisitLambda <T>(NodeBase root, PredicateBuilderConfiguration configuration = null)
{
var input = new ExpressionNodeVisitorInput(typeof(T), configuration);
return(Expression.Lambda <Func <T, bool> >(Visit(root, input), input.ItParameterExpression));
}
public LambdaExpression VisitLambda(NodeBase root, Type instanceType, PredicateBuilderConfiguration configuration = null)
{
var input = new ExpressionNodeVisitorInput(instanceType, configuration);
return(Expression.Lambda(Visit(root, input), input.ItParameterExpression));
}
protected virtual Expression BuildUnaryNodeExpression(BinaryNode node, ParameterExpression itParameter, PredicateBuilderConfiguration nodeConfiguration)
{
return(PredicateBuilder.GetPredicateExpression(itParameter, node.Expression, node.Operator, node.Value, nodeConfiguration));
}
public ExpressionNodeVisitorInput(Type itParameterType, string itParameterName, PredicateBuilderConfiguration defaultConfiguration, IDictionary <string, PredicateBuilderConfiguration> configurations = null)
: this(Expression.Parameter(itParameterType, itParameterName ?? ""), defaultConfiguration, configurations)
{
}
public ExpressionNodeVisitorInput(Type itParameterType, PredicateBuilderConfiguration defaultConfiguration, IDictionary <string, PredicateBuilderConfiguration> configurations)
: this(itParameterType, defaultConfiguration?.ItParameterName, defaultConfiguration, configurations)
{
}
public ExpressionNodeVisitorInput(Type itParameterType, PredicateBuilderConfiguration defaultConfiguration)
: this(itParameterType, defaultConfiguration?.ItParameterName, defaultConfiguration, null)
{
}
public static Expression GetPredicateExpression
(Expression sourceExpression, ExpressionOperator @operator, object value, PredicateBuilderConfiguration configuration = null)
{
var predicateBuilder = new PredicateBuilder(sourceExpression, @operator, value, configuration);
return(predicateBuilder.BuildPredicateExpression());
}
public static Expression GetPredicateExpression
(ParameterExpression instanceParameter, string sourceExpression, ExpressionOperator @operator, object value, PredicateBuilderConfiguration configuration = null)
{
var left = MemberExpressionBuilder.GetExpressionSelector(instanceParameter, sourceExpression).Body;
return(GetPredicateExpression(left, @operator, value, configuration));
}
public Expression <Func <T, bool> > GetLambdaExpression <T>(PredicateBuilderConfiguration configuration = null)
{
return(new ExpressionNodeVisitor().VisitLambda <T>(this, configuration));
}
public LambdaExpression GetLambdaExpression(Type type, PredicateBuilderConfiguration configuration = null)
{
return(new ExpressionNodeVisitor().VisitLambda(this, type, configuration));
}
