com.goldencode.p2j.util

Class RowidExpression

java.lang.Object

com.goldencode.p2j.util.RowidExpression

All Implemented Interfaces:

Resolvable

Direct Known Subclasses:

RuntimeJastInterpreter.RowidExpressionAdapter

public abstract class RowidExpression
extends java.lang.Object
implements Resolvable

A convenience adapter class for a Resolvable runtime expression which must return a rowid result. Subclasses need implement only the execute() method.

Constructor Summary

Constructors

Constructor and Description
RowidExpression()

Method Summary

Modifier and Type	Method and Description
abstract rowid	execute() Execute the underlying expression and get its result.
java.lang.Class	getType() Report the return type expected from executing the expression.
BaseDataType	resolve() Execute the underlying expression and get its result.

Methods inherited from class java.lang.Object

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

Constructor Detail

RowidExpression

public RowidExpression()

Method Detail

resolve

public final BaseDataType resolve()

Execute the underlying expression and get its result.

Specified by:

resolve in interface Resolvable

Returns:

Result of expression execution.

getType

public final java.lang.Class getType()

Report the return type expected from executing the expression.

Specified by:

getType in interface Resolvable

Returns:

Class indicating the type which will be returned by the expression. Must be a variant of BaseDataType.

execute

public abstract rowid execute()

Execute the underlying expression and get its result.

Returns:

Result of expression execution as an rowid.