Examples with MapHandle org.apache.datasketches.memory.MapHandle used on opensource projects

Example 6 with MapHandle

use of org.apache.datasketches.memory.MapHandle in project sketches-core by DataSketches.

the class CpcCBinariesTest method checkEmptyBin.

@Test
public void checkEmptyBin() {
    final String fileName = "cpc-empty.sk";
    final File file = getResourceFile(fileName);
    try (MapHandle mh = Memory.map(file)) {
        final Memory wmem = mh.get();
        println(PreambleUtil.toString(wmem, true));
        final CpcSketch sk = CpcSketch.heapify(wmem);
        assertEquals(sk.getFlavor(), Flavor.EMPTY);
    } catch (final Exception e) {
        e.printStackTrace();
    }
}

Example 7 with MapHandle

use of org.apache.datasketches.memory.MapHandle in project sketches-core by DataSketches.

the class CpcCBinariesTest method checkHybridBin.

@Test
public void checkHybridBin() {
    final String fileName = "cpc-hybrid.sk";
    final File file = getResourceFile(fileName);
    try (MapHandle mh = Memory.map(file)) {
        final Memory mem = mh.get();
        println("CPP GENERATED SKETCH FROM BINARY FILE LgK=11, U0 to U199");
        println("PreambleUtil.toString(mem, true)" + LS);
        println(PreambleUtil.toString(mem, true));
        println(LS + LS + "################");
        println("CpcSketch sk = CpcSketch.heapify(mem);");
        println("sk.toString(true)" + LS);
        final CpcSketch sk = CpcSketch.heapify(mem);
        println(sk.toString(true));
        assertEquals(sk.getFlavor(), Flavor.HYBRID);
        final double est1 = sk.getEstimate();
        assertEquals(est1, 200, 200 * .02);
        for (long i = 0; i < 200; i++) {
            sk.update(i);
        }
        final double est2 = sk.getEstimate();
        // assert no change
        assertEquals(est2, est1, 0);
    } catch (final Exception e) {
        e.printStackTrace();
    }
}

Example 8 with MapHandle

use of org.apache.datasketches.memory.MapHandle in project sketches-core by DataSketches.

the class CpcCBinariesTest method checkSparseBin.

@Test
public void checkSparseBin() {
    final String fileName = "cpc-sparse.sk";
    final File file = getResourceFile(fileName);
    try (MapHandle mh = Memory.map(file)) {
        final Memory mem = mh.get();
        println("CPP GENERATED SKETCH FROM BINARY FILE LgK=11, U0 to U99");
        println("PreambleUtil.toString(mem, true)" + LS);
        println(PreambleUtil.toString(mem, true));
        println(LS + LS + "################");
        println("CpcSketch sk = CpcSketch.heapify(mem);");
        println("sk.toString(true)" + LS);
        final CpcSketch sk = CpcSketch.heapify(mem);
        println(sk.toString(true));
        assertEquals(sk.getFlavor(), Flavor.SPARSE);
        final double est1 = sk.getEstimate();
        assertEquals(est1, 100, 100 * .02);
        for (int i = 0; i < 100; i++) {
            sk.update(i);
        }
        final double est2 = sk.getEstimate();
        // assert no change
        assertEquals(est2, est1, 0);
    } catch (final Exception e) {
        e.printStackTrace();
    }
}

Example 9 with MapHandle

use of org.apache.datasketches.memory.MapHandle in project sketches-core by DataSketches.

the class CpcCBinariesTest method checkSlidingImages.

@Test
public void checkSlidingImages() {
    final String fileName = "cpc-sliding.sk";
    final File file = getResourceFile(fileName);
    try (MapHandle mh = Memory.map(file)) {
        final Memory mem = mh.get();
        final int cap = (int) mem.getCapacity();
        final byte[] memByteArr = new byte[cap];
        mem.getByteArray(0, memByteArr, 0, cap);
        final CpcSketch sk = new CpcSketch(11);
        for (int i = 0; i < 20000; i++) {
            sk.update(i);
        }
        final byte[] mem2ByteArr = sk.toByteArray();
        final Memory mem2 = Memory.wrap(mem2ByteArr);
        assertEquals(mem.getCapacity(), mem2.getCapacity());
        assertEquals(memByteArr, mem2ByteArr);
    } catch (final Exception e) {
        e.printStackTrace();
    }
}

Example 10 with MapHandle

use of org.apache.datasketches.memory.MapHandle in project sketches-core by DataSketches.

the class CpcCBinariesTest method checkHybridImages.

@Test
public void checkHybridImages() {
    final String fileName = "cpc-hybrid.sk";
    final File file = getResourceFile(fileName);
    try (MapHandle mh = Memory.map(file)) {
        final Memory mem = mh.get();
        final int cap = (int) mem.getCapacity();
        final byte[] memByteArr = new byte[cap];
        mem.getByteArray(0, memByteArr, 0, cap);
        final CpcSketch sk = new CpcSketch(11);
        for (int i = 0; i < 200; i++) {
            sk.update(i);
        }
        final byte[] mem2ByteArr = sk.toByteArray();
        final Memory mem2 = Memory.wrap(mem2ByteArr);
        assertEquals(mem.getCapacity(), mem2.getCapacity());
        assertEquals(memByteArr, mem2ByteArr);
    } catch (final Exception e) {
        e.printStackTrace();
    }
}