/**
* Fills all keys contained in the receiver into the specified list. Fills the list, starting at
* index 0. After this call returns the specified list has a new size that equals
* <tt>this.size()</tt>. Iteration order is guaranteed to be <i>identical</i> to the order used by
* method {@link #forEachKey(LongProcedure)}.
*
* <p>This method can be used to iterate over the keys of the receiver.
*
* @param list the list to be filled, can have any size.
*/
@Override
public void keys(LongArrayList list) {
list.setSize(distinct);
long[] elements = list.elements();
int j = 0;
for (int i = table.length; i-- > 0; ) {
if (state[i] == FULL) {
elements[j++] = table[i];
}
}
}
/**
* Fills all pairs satisfying a given condition into the specified lists. Fills into the lists,
* starting at index 0. After this call returns the specified lists both have a new size, the
* number of pairs satisfying the condition. Iteration order is guaranteed to be <i>identical</i>
* to the order used by method {@link #forEachKey(LongProcedure)}.
*
* <p><b>Example:</b> <br>
*
* <pre>
* LongFloatProcedure condition = new LongFloatProcedure() { // match even values only
* public boolean apply(long key, float value) { return value%2==0; }
* }
* keys = (8,7,6), values = (1,2,2) --> keyList = (6,8), valueList = (2,1)</tt>
* </pre>
*
* @param condition the condition to be matched. Takes the current key as first and the current
* value as second argument.
* @param keyList the list to be filled with keys, can have any size.
* @param valueList the list to be filled with values, can have any size.
*/
@Override
public void pairsMatching(
LongFloatProcedure condition, LongArrayList keyList, FloatArrayList valueList) {
keyList.clear();
valueList.clear();
for (int i = table.length; i-- > 0; ) {
if (state[i] == FULL && condition.apply(table[i], values[i])) {
keyList.add(table[i]);
valueList.add(values[i]);
}
}
}
@Override
protected void setup(Context context) throws IOException, InterruptedException {
super.setup(context);
Parameters params =
new Parameters(context.getConfiguration().get(PFPGrowth.PFP_PARAMETERS, ""));
for (Pair<String, Long> e : PFPGrowth.readFList(context.getConfiguration())) {
featureReverseMap.add(e.getFirst());
freqList.add(e.getSecond());
}
maxHeapSize = Integer.valueOf(params.get(PFPGrowth.MAX_HEAPSIZE, "50"));
minSupport = Integer.valueOf(params.get(PFPGrowth.MIN_SUPPORT, "3"));
maxPerGroup = params.getInt(PFPGrowth.MAX_PER_GROUP, 0);
numFeatures = featureReverseMap.size();
useFP2 = "true".equals(params.get(PFPGrowth.USE_FPG2));
}
