org.jsimpledb.parse.expr

Class TypeInferringNode

java.lang.Object

org.jsimpledb.parse.expr.TypeInferringNode

All Implemented Interfaces:

Node

Direct Known Subclasses:

LambdaNode, MethodReferenceNode

public abstract class TypeInferringNode
extends Object
implements Node

Support superclass for Nodes that perform type inferrence and therefore require a target type in order to be completely parsed.

Constructor Summary

Constructors

Constructor and Description
TypeInferringNode()

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.
abstract <T> Node	resolve(ParseSession session, TypeToken<T> target) Resolve this instance into an evaluable Node, given the specified target type.

Methods inherited from class java.lang.Object

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

Constructor Detail

TypeInferringNode

public TypeInferringNode()

Method Detail

evaluate

public Value evaluate(ParseSession session)

Evaluate this node.

The implementation in TypeInferringNode always throws an EvalException.

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

resolve

public abstract <T> Node resolve(ParseSession session,
                                 TypeToken<T> target)

Resolve this instance into an evaluable Node, given the specified target type.

There will be a transaction open.

Type Parameters:

T - target node type

Parameters:

session - parse session

target - expected target type

Returns:

this node resolved to target

Throws:

EvalException - if this instance cannot be resolved to target

EvalException - if resolution to target is ambiguous