nz.org.venice.parser
Class AnalyserGuard

java.lang.Object
  nz.org.venice.parser.AnalyserGuard

public class AnalyserGuard

extends java.lang.Object

This class keeps track of the running time of expressions which can forever The check is done per date

Author:

Mark Hummel

Field Summary

static int	maxRunTime
static int	maxStackDepth

Method Summary

boolean	evaluationTimeElapsed(Expression expression, org.safehaus.uuid.UUID expressionID, Symbol symbol, int day) Return true if the given expression evaluation exceeds the limit.
void	finishFunction(Expression expression, org.safehaus.uuid.UUID expressionID, Symbol symbol, int day) Record that a function call has completed.
void	finishLoop(Expression expression, org.safehaus.uuid.UUID expressionID, Symbol symbol, int day) Record that a loop has completed.
static AnalyserGuard	getInstance()
protected void	setMaxStackDepth(int depth)
protected void	setRuntimeLimit(int secs)
boolean	stackDepthLimitExceeded(Expression expression, org.safehaus.uuid.UUID expressionID, Symbol symbol, int day) Return true if the function call depth exceeds the limit. .
void	startFunction(Expression expression, org.safehaus.uuid.UUID expressionID, Symbol symbol, int day) Record that a function is being called.
void	startLoop(Expression expression, org.safehaus.uuid.UUID expressionID, Symbol symbol, int day) Record that a loop has begun evaluation.

Methods inherited from class java.lang.Object

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

Field Detail

maxRunTime

public static int maxRunTime

maxStackDepth

public static int maxStackDepth

Method Detail

getInstance

public static AnalyserGuard getInstance()

evaluationTimeElapsed

public boolean evaluationTimeElapsed(Expression expression,
                                     org.safehaus.uuid.UUID expressionID,
                                     Symbol symbol,
                                     int day)

Return true if the given expression evaluation exceeds the limit.

Parameters:

expression - The expression being evaluated

expressionID - Identifier for the expression

symbol - The symbol on which the rule is being evaluated

day - Integer offset of the quote bundle. Included so the limit exceeded doesn't trigger if some progress is being made.

stackDepthLimitExceeded

public boolean stackDepthLimitExceeded(Expression expression,
                                       org.safehaus.uuid.UUID expressionID,
                                       Symbol symbol,
                                       int day)

Return true if the function call depth exceeds the limit. .

Parameters:

expression - The expression being evaluated

expressionID - Identifier for the expression

symbol - The symbol on which the rule is being evaluated

day - Integer offset of the quote bundle. Included so the limit exceeded doesn't trigger if some progress is being made.

startLoop

public void startLoop(Expression expression,
                      org.safehaus.uuid.UUID expressionID,
                      Symbol symbol,
                      int day)

Record that a loop has begun evaluation.

Parameters:

expression - The expression being evaluated

expressionID - Identifier for the expression

symbol - The symbol on which the rule is being evaluated

day - Integer offset of the quote bundle. Included so the limit exceeded doesn't trigger if some progress is being made.

finishLoop

public void finishLoop(Expression expression,
                       org.safehaus.uuid.UUID expressionID,
                       Symbol symbol,
                       int day)

Record that a loop has completed.

Parameters:

expression - The expression being evaluated

expressionID - Identifier for the expression

symbol - The symbol on which the rule is being evaluated

day - Integer offset of the quote bundle. Included so the limit exceeded doesn't trigger if some progress is being made.

startFunction

public void startFunction(Expression expression,
                          org.safehaus.uuid.UUID expressionID,
                          Symbol symbol,
                          int day)

Record that a function is being called.

Parameters:

expression - The expression being evaluated

expressionID - Identifier for the expression

symbol - The symbol on which the rule is being evaluated

day - Integer offset of the quote bundle. Included so the limit exceeded doesn't trigger if some progress is being made.

finishFunction

public void finishFunction(Expression expression,
                           org.safehaus.uuid.UUID expressionID,
                           Symbol symbol,
                           int day)

Record that a function call has completed.

Parameters:

expression - The expression being evaluated

expressionID - Identifier for the expression

symbol - The symbol on which the rule is being evaluated

day - Integer offset of the quote bundle. Included so the limit exceeded doesn't trigger if some progress is being made.

setRuntimeLimit

protected void setRuntimeLimit(int secs)

setMaxStackDepth

protected void setMaxStackDepth(int depth)