Package se.liu.ida.hefquin.engine.queryplan.executable.impl.ops

Class BaseForExecOps

java.lang.Object

se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.BaseForExecOps

All Implemented Interfaces:

StatsProvider, ExecutableOperator

Direct Known Subclasses:

BinaryExecutableOpBase, NaryExecutableOpBase, NullaryExecutableOpBase, UnaryExecutableOpBase

public abstract class BaseForExecOps
extends Object
implements ExecutableOperator

Top-level base class for all implementations of ExecutableOperator. This base class handles the collection of exceptions that may occur during the execution of the algorithm implemented by an executable operator.

Field Summary

Fields

Modifier and Type	Field	Description
protected final boolean	collectExceptions	If true, then the subclasses are expected to collect exceptions (by calling recordExceptionCaughtDuringExecution(Exception)); otherwise, they are expected to throw the exceptions immediately.

Constructor Summary

Constructors

Constructor	Description
BaseForExecOps(boolean collectExceptions)

Method Summary

Modifier and Type	Method	Description
List<Exception>	getExceptionsCaughtDuringExecution()	Returns exceptions that were caught and collected during the execution of this operator (if any).
protected void	recordExceptionCaughtDuringExecution(Exception e)

Methods inherited from class java.lang.Object

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

Methods inherited from interface se.liu.ida.hefquin.engine.queryplan.executable.ExecutableOperator

getStats

Methods inherited from interface se.liu.ida.hefquin.base.utils.StatsProvider

resetStats

Field Details

collectExceptions

protected final boolean collectExceptions

If true, then the subclasses are expected to collect exceptions (by calling recordExceptionCaughtDuringExecution(Exception)); otherwise, they are expected to throw the exceptions immediately.

Constructor Details

BaseForExecOps

public BaseForExecOps(boolean collectExceptions)

Method Details

getExceptionsCaughtDuringExecution

public List<Exception> getExceptionsCaughtDuringExecution()

Description copied from interface: ExecutableOperator

Returns exceptions that were caught and collected during the execution of this operator (if any). If no exceptions were caught (which should be the normal case), then this function returns an empty list.

Specified by:

getExceptionsCaughtDuringExecution in interface ExecutableOperator

recordExceptionCaughtDuringExecution

protected void recordExceptionCaughtDuringExecution(Exception e)