laur.dm.ar
Class AssociationsMiner
java.lang.Object
|
+--java.lang.Thread
|
+--laur.tools.AbortableThread
|
+--laur.tools.MonitoredThread
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+--laur.dm.ar.AssociationsMiner
- All Implemented Interfaces:
- java.lang.Runnable
- Direct Known Subclasses:
- AprioriRules, CoverRules, CoverRulesOpt
- public abstract class AssociationsMiner
- extends MonitoredThread
This abstract class must be extended by the algorithms that will look
for associations.
Fields inherited from class java.lang.Thread |
MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY |
Method Summary |
protected void |
execute()
Executes the findAssociations() method. |
abstract java.util.ArrayList |
findAssociations(DBCacheReader cacheReader,
double minSupport,
double minConfidence)
Find association rules in a database, given the set of
frequent itemsets. |
abstract java.util.ArrayList |
findAssociations(DBCacheReader cacheReader,
double minSupport,
double minConfidence,
Itemset inAntecedent,
Itemset inConsequent,
Itemset ignored,
int maxAntecedent,
int minConsequent)
Find association rules in a database, given the set of
frequent itemsets and a set of restrictions. |
java.util.ArrayList |
getResult()
Gets the value returned by findAssociations() after the thread
completed its execution. |
void |
setParameters(ThreadMonitor monitor,
DBCacheReader cacheReader,
double minSupport,
double minConfidence)
Sets the parameters for the mining algorithm. |
void |
setParameters(ThreadMonitor monitor,
DBCacheReader cacheReader,
double minSupport,
double minConfidence,
Itemset inAntecedent,
Itemset inConsequent,
Itemset ignored,
int maxAntecedent,
int minConsequent)
Sets the parameters for the mining algorithm. |
Methods inherited from class java.lang.Thread |
activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
cache_reader
protected DBCacheReader cache_reader
- With this object we read from the cache
min_support
protected double min_support
- Minimum support value.
min_confidence
protected double min_confidence
- Minimum confidence value.
is_in_antecedent
protected Itemset is_in_antecedent
- The items required to be in antecedent.
is_in_consequent
protected Itemset is_in_consequent
- The items required to be in consequent.
is_ignored
protected Itemset is_ignored
- The items to ignore.
max_antecedent
protected int max_antecedent
- Maximum number of items allowed in antecedent.
min_consequent
protected int min_consequent
- Minimum number of items required in consequent.
AssociationsMiner
public AssociationsMiner()
findAssociations
public abstract java.util.ArrayList findAssociations(DBCacheReader cacheReader,
double minSupport,
double minConfidence)
- Find association rules in a database, given the set of
frequent itemsets.
- Parameters:
cacheReader
- the object used to read from the cacheminSupport
- the minimum supportminConfidence
- the minimum confidence- Returns:
- an ArrayList containing all association rules found
findAssociations
public abstract java.util.ArrayList findAssociations(DBCacheReader cacheReader,
double minSupport,
double minConfidence,
Itemset inAntecedent,
Itemset inConsequent,
Itemset ignored,
int maxAntecedent,
int minConsequent)
- Find association rules in a database, given the set of
frequent itemsets and a set of restrictions.
- Parameters:
cacheReader
- the object used to read from the cacheminSupport
- the minimum supportminConfidence
- the minimum confidenceinAntecedent
- the items that must appear in the antecedent
of each rule, if null then this constraint is ignoredinConsequent
- the items that must appear in the consequent
of each rule, if null then this constraint is ignoredignored
- the items that should be ignored,
if null then this constraint is ignoredmaxAntecedent
- the maximum number of items that can appear
in the antecedent of each rule, if 0 then this constraint is ignoredminConsequent
- the minimum number of items that should appear
in the consequent of each rule, if 0 then this constraint is ignored- Returns:
- an ArrayList containing all association rules found
setParameters
public void setParameters(ThreadMonitor monitor,
DBCacheReader cacheReader,
double minSupport,
double minConfidence)
- Sets the parameters for the mining algorithm. This method should
be used before starting the thread.
- Parameters:
monitor
- an object that we should notify about important
eventscacheReader
- the object used to read from the cacheminSupport
- the minimum supportminConfidence
- the minimum confidence- Throws:
IllegalStateException
- if the thread is already running
setParameters
public void setParameters(ThreadMonitor monitor,
DBCacheReader cacheReader,
double minSupport,
double minConfidence,
Itemset inAntecedent,
Itemset inConsequent,
Itemset ignored,
int maxAntecedent,
int minConsequent)
- Sets the parameters for the mining algorithm. This method should
be used before starting the thread.
- Parameters:
monitor
- an object that we should notify about important
eventscacheReader
- the object used to read from the cacheminSupport
- the minimum supportminConfidence
- the minimum confidenceinAntecedent
- the items that must appear in the antecedent
of each rule, if null then this constraint is ignoredinConsequent
- the items that must appear in the consequent
of each rule, if null then this constraint is ignoredignored
- the items that should be ignored,
if null then this constraint is ignoredmaxAntecedent
- the maximum number of items that can appear
in the antecedent of each rule, if 0 then this constraint is ignoredminConsequent
- the minimum number of items that should appear
in the consequent of each rule, if 0 then this constraint is ignored- Throws:
IllegalStateException
- if the thread is already running
execute
protected void execute()
- Executes the findAssociations() method.
- Overrides:
execute
in class AbortableThread
getResult
public java.util.ArrayList getResult()
- Gets the value returned by findAssociations() after the thread
completed its execution.
- Returns:
- the rules discovered in the database
- Throws:
IllegalStateException
- if the thread is still running
or if no result is available