org.jsimpledb.parse.expr

Class ConstNode

java.lang.Object

org.jsimpledb.parse.expr.ConstNode

All Implemented Interfaces:

Node

Direct Known Subclasses:

VarNode

public class ConstNode
extends Object
implements Node

A Node that always evaluates to the same Value.

Constructor Summary

Constructors

Constructor and Description
ConstNode(Value value)

Method Summary

Modifier and Type	Method and Description
Value	evaluate(ParseSession session) Evaluate this node.
Class<?>	getType(ParseSession session) Get the type of this node's value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ConstNode

public ConstNode(Value value)

Method Detail

evaluate

public Value evaluate(ParseSession session)

Description copied from interface: Node

Evaluate this node. There will be a transaction open.

Specified by:

evaluate in interface Node

Parameters:

session - parse session

Returns:

result of node evaluation

getType

public Class<?> getType(ParseSession session)

Description copied from interface: Node

Get the type of this node's value.

If the type is unknown, Object.class should be returned.

Specified by:

getType in interface Node

Parameters:

session - parse session

Returns:

the expected type of the node