Examples with CompactRandomCutTreeContext com.amazon.randomcutforest.state.tree.CompactRandomCutTreeContext used on opensource projects

Example 1 with CompactRandomCutTreeContext

use of com.amazon.randomcutforest.state.tree.CompactRandomCutTreeContext in project random-cut-forest-by-aws by aws.

the class RandomCutForestMapper method singlePrecisionForest.

public RandomCutForest singlePrecisionForest(RandomCutForest.Builder<?> builder, RandomCutForestState state, IPointStore<float[]> extPointStore, List<ITree<Integer, float[]>> extTrees, List<IStreamSampler<Integer>> extSamplers) {
    checkArgument(builder != null, "builder cannot be null");
    checkArgument(extTrees == null || extTrees.size() == state.getNumberOfTrees(), "incorrect number of trees");
    checkArgument(extSamplers == null || extSamplers.size() == state.getNumberOfTrees(), "incorrect number of samplers");
    checkArgument(extSamplers != null | state.isSaveSamplerStateEnabled(), " need samplers ");
    checkArgument(extPointStore != null || state.isSaveCoordinatorStateEnabled(), " need coordinator state ");
    Random random = builder.getRandom();
    ComponentList<Integer, float[]> components = new ComponentList<>();
    CompactRandomCutTreeContext context = new CompactRandomCutTreeContext();
    IPointStore<float[]> pointStore = (extPointStore == null) ? new PointStoreMapper().toModel(state.getPointStoreState()) : extPointStore;
    PointStoreCoordinator<float[]> coordinator = new PointStoreCoordinator<>(pointStore);
    coordinator.setTotalUpdates(state.getTotalUpdates());
    context.setPointStore(pointStore);
    context.setMaxSize(state.getSampleSize());
    RandomCutTreeMapper treeMapper = new RandomCutTreeMapper();
    List<CompactRandomCutTreeState> treeStates = state.isSaveTreeStateEnabled() ? state.getCompactRandomCutTreeStates() : null;
    CompactSamplerMapper samplerMapper = new CompactSamplerMapper();
    List<CompactSamplerState> samplerStates = state.isSaveSamplerStateEnabled() ? state.getCompactSamplerStates() : null;
    for (int i = 0; i < state.getNumberOfTrees(); i++) {
        IStreamSampler<Integer> sampler = (extSamplers != null) ? extSamplers.get(i) : samplerMapper.toModel(samplerStates.get(i), random.nextLong());
        ITree<Integer, float[]> tree;
        if (extTrees != null) {
            tree = extTrees.get(i);
        } else if (treeStates != null) {
            tree = treeMapper.toModel(treeStates.get(i), context, random.nextLong());
            sampler.getSample().forEach(s -> tree.addPoint(s.getValue(), s.getSequenceIndex()));
            tree.setConfig(Config.BOUNDING_BOX_CACHE_FRACTION, treeStates.get(i).getBoundingBoxCacheFraction());
        } else {
            // using boundingBoxCahce for the new tree
            tree = new RandomCutTree.Builder().capacity(state.getSampleSize()).randomSeed(random.nextLong()).pointStoreView(pointStore).boundingBoxCacheFraction(state.getBoundingBoxCacheFraction()).centerOfMassEnabled(state.isCenterOfMassEnabled()).storeSequenceIndexesEnabled(state.isStoreSequenceIndexesEnabled()).build();
            sampler.getSample().forEach(s -> tree.addPoint(s.getValue(), s.getSequenceIndex()));
        }
        components.add(new SamplerPlusTree<>(sampler, tree));
    }
    builder.precision(Precision.FLOAT_32);
    return new RandomCutForest(builder, coordinator, components, random);
}

Example 2 with CompactRandomCutTreeContext

use of com.amazon.randomcutforest.state.tree.CompactRandomCutTreeContext in project random-cut-forest-by-aws by aws.

the class RandomCutForestMapper method toModel.

/**
 * Create a {@link RandomCutForest} instance from a
 * {@link RandomCutForestState}. If the state contains tree states, then trees
 * will be constructed from the tree state objects. Otherwise, empty trees are
 * created and populated from the sampler data. The resulting forest should be
 * equal in distribution to the forest that the state object was created from.
 *
 * @param state            A Random Cut Forest state object.
 * @param executionContext An executor context that will be used to initialize
 *                         new executors in the Random Cut Forest. If this
 *                         argument is null, then the mapper will look for an
 *                         executor context in the state object.
 * @param seed             A random seed.
 * @return A Random Cut Forest corresponding to the state object.
 * @throws NullPointerException if both the {@code executorContext} method
 *                              argument and the executor context field in the
 *                              state object are null.
 */
public RandomCutForest toModel(RandomCutForestState state, ExecutionContext executionContext, long seed) {
    ExecutionContext ec;
    if (executionContext != null) {
        ec = executionContext;
    } else {
        checkNotNull(state.getExecutionContext(), "The executor context in the state object is null, an executor context must be passed explicitly to toModel()");
        ec = state.getExecutionContext();
    }
    RandomCutForest.Builder<?> builder = RandomCutForest.builder().numberOfTrees(state.getNumberOfTrees()).dimensions(state.getDimensions()).timeDecay(state.getTimeDecay()).sampleSize(state.getSampleSize()).centerOfMassEnabled(state.isCenterOfMassEnabled()).outputAfter(state.getOutputAfter()).parallelExecutionEnabled(ec.isParallelExecutionEnabled()).threadPoolSize(ec.getThreadPoolSize()).storeSequenceIndexesEnabled(state.isStoreSequenceIndexesEnabled()).shingleSize(state.getShingleSize()).boundingBoxCacheFraction(state.getBoundingBoxCacheFraction()).compact(state.isCompact()).internalShinglingEnabled(state.isInternalShinglingEnabled()).randomSeed(seed);
    if (Precision.valueOf(state.getPrecision()) == Precision.FLOAT_32) {
        return singlePrecisionForest(builder, state, null, null, null);
    }
    Random random = builder.getRandom();
    PointStore pointStore = new PointStoreMapper().convertFromDouble(state.getPointStoreState());
    ComponentList<Integer, float[]> components = new ComponentList<>();
    PointStoreCoordinator<float[]> coordinator = new PointStoreCoordinator<>(pointStore);
    coordinator.setTotalUpdates(state.getTotalUpdates());
    CompactRandomCutTreeContext context = new CompactRandomCutTreeContext();
    context.setPointStore(pointStore);
    context.setMaxSize(state.getSampleSize());
    checkArgument(state.isSaveSamplerStateEnabled(), " conversion cannot proceed without samplers");
    List<CompactSamplerState> samplerStates = state.getCompactSamplerStates();
    CompactSamplerMapper samplerMapper = new CompactSamplerMapper();
    for (int i = 0; i < state.getNumberOfTrees(); i++) {
        CompactSampler compactData = samplerMapper.toModel(samplerStates.get(i));
        RandomCutTree tree = RandomCutTree.builder().capacity(state.getSampleSize()).pointStoreView(pointStore).storeSequenceIndexesEnabled(state.isStoreSequenceIndexesEnabled()).outputAfter(state.getOutputAfter()).centerOfMassEnabled(state.isCenterOfMassEnabled()).randomSeed(random.nextLong()).build();
        CompactSampler sampler = CompactSampler.builder().capacity(state.getSampleSize()).timeDecay(state.getTimeDecay()).randomSeed(random.nextLong()).build();
        sampler.setMaxSequenceIndex(compactData.getMaxSequenceIndex());
        sampler.setMostRecentTimeDecayUpdate(compactData.getMostRecentTimeDecayUpdate());
        for (Weighted<Integer> sample : compactData.getWeightedSample()) {
            Integer reference = sample.getValue();
            Integer newReference = tree.addPoint(reference, sample.getSequenceIndex());
            if (newReference.intValue() != reference.intValue()) {
                pointStore.incrementRefCount(newReference);
                pointStore.decrementRefCount(reference);
            }
            sampler.addPoint(newReference, sample.getWeight(), sample.getSequenceIndex());
        }
        components.add(new SamplerPlusTree<>(sampler, tree));
    }
    return new RandomCutForest(builder, coordinator, components, random);
}