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Superclass for filter nodes in a filter expression tree. Allow validation against stream event types and evaluation of events against filter tree.

The following tables list the members exposed by the ExprNode type.

Public Methods

  NameDescription
Accept
Accept the visitor. The visitor will first visit the parent then visit all child nodes, then their child nodes. The visitor can decide to skip child nodes by returning false in isVisit.

AddChildNode
Adds a child node.

static memberDeepEquals
Compare two expression nodes and their children in exact child-node sequence, returning true if the 2 expression nodes trees are equals, or false if they are not equals. Recursive call since it uses this method to compare child nodes in the same exact sequence. Nodes are compared using the EqualsNode method.

DumpDebug
Recursively print out all nodes.

Equals (Inherited from Object.)
EqualsNode
Return true if a expression node semantically equals the current node, or false if not. Concrete implementations should compare the type and any additional information that impact the evaluation of a node.

Evaluate
Evaluate event tuple and return result.

GetHashCode (Inherited from Object.)
GetType (Inherited from Object.)
GetValidatedSubtree
Validates the expression node subtree that has this node as root. Some of the nodes of the tree, including the root, might be replaced in the process.

ToString (Inherited from Object.)
Validate
Validate node.

Protected Methods

  NameDescription
Finalize (Inherited from Object.)
MemberwiseClone (Inherited from Object.)

Protected Constructors

  NameDescription
ExprNodeNew
Constructor creates a list of child nodes.

Public Properties

  NameDescription
ChildNodes
Returns list of child nodes.

ExpressionString
Returns the expression node rendered as a string.

ReturnType
Returns the type that the node's evaluate method returns an instance of.