Example usage for org.apache.commons.lang3 ArrayUtils lastIndexOf

Introduction

In this page you can find the example usage for org.apache.commons.lang3 ArrayUtils lastIndexOf.

Prototype

public static int lastIndexOf(final boolean[] array, final boolean valueToFind) 

Source Link

Document

Finds the last index of the given value within the array.

This method returns #INDEX_NOT_FOUND ( -1 ) if null array input.

Usage

From source file:fr.inria.atlanmod.neoemf.data.berkeleydb.store.DirectWriteBerkeleyDBStore.java

@Override
public int lastIndexOf(InternalEObject object, EStructuralFeature feature, Object value) {
    int resultValue;
    PersistentEObject persistentEObject = PersistentEObject.from(object);
    Object[] array = (Object[]) getFromMap(persistentEObject, feature);
    if (isNull(array)) {
        resultValue = ArrayUtils.INDEX_NOT_FOUND;
    } else if (feature instanceof EAttribute) {
        resultValue = ArrayUtils.lastIndexOf(array, serializeToProperty((EAttribute) feature, value));
    } else {//from   w  w w .ja va2 s  .co  m
        PersistentEObject childEObject = PersistentEObject.from(value);
        resultValue = ArrayUtils.lastIndexOf(array, childEObject.id());
    }
    return resultValue;
}

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From source file:fr.inria.atlanmod.neoemf.data.blueprints.store.DirectWriteBlueprintsStore.java

@Override
protected int lastIndexOfAttribute(PersistentEObject object, EAttribute eAttribute, Object value) {
    return ArrayUtils.lastIndexOf(toArray(object, eAttribute), value);
}

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From source file:fr.inria.atlanmod.neoemf.data.hbase.store.DirectWriteHBaseStore.java

@Override
public int lastIndexOf(InternalEObject object, EStructuralFeature feature, Object value) {
    PersistentEObject eObject = PersistentEObject.from(object);
    String[] array = (String[]) getFromTable(eObject, feature);
    if (isNull(array)) {
        return PersistentStore.NO_INDEX;
    }//from   ww w  .j a  v  a2 s .  co  m
    if (feature instanceof EAttribute) {
        return ArrayUtils.lastIndexOf(array, serializeToProperty((EAttribute) feature, value));
    } else {
        PersistentEObject childEObject = PersistentEObject.from(value);
        return ArrayUtils.lastIndexOf(array, childEObject.id().toString());
    }
}

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From source file:org.apache.mahout.classifier.df.builder.DecisionTreeBuilderTest.java

/**
 * make sure that DecisionTreeBuilder.randomAttributes() returns the correct number of attributes, that have not been
 * selected yet/*  w w w .j av a 2 s .c om*/
 */
@Test
public void testRandomAttributes() throws Exception {
    Random rng = RandomUtils.getRandom();
    int nbAttributes = rng.nextInt(100) + 1;
    boolean[] selected = new boolean[nbAttributes];

    for (int nloop = 0; nloop < 100; nloop++) {
        Arrays.fill(selected, false);

        // randomly select some attributes
        int nbSelected = rng.nextInt(nbAttributes - 1);
        for (int index = 0; index < nbSelected; index++) {
            int attr;
            do {
                attr = rng.nextInt(nbAttributes);
            } while (selected[attr]);

            selected[attr] = true;
        }

        int m = rng.nextInt(nbAttributes);

        Method randomAttributes = DecisionTreeBuilder.class.getDeclaredMethod("randomAttributes", Random.class,
                boolean[].class, int.class);
        randomAttributes.setAccessible(true);
        int[] attrs = (int[]) randomAttributes.invoke(null, rng, selected, m);

        assertNotNull(attrs);
        assertEquals(Math.min(m, nbAttributes - nbSelected), attrs.length);

        for (int attr : attrs) {
            // the attribute should not be already selected
            assertFalse("an attribute has already been selected", selected[attr]);

            // each attribute should be in the range [0, nbAttributes[
            assertTrue(attr >= 0);
            assertTrue(attr < nbAttributes);

            // each attribute should appear only once
            assertEquals(ArrayUtils.indexOf(attrs, attr), ArrayUtils.lastIndexOf(attrs, attr));
        }
    }
}

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From source file:org.apache.mahout.classifier.df.builder.DefaultTreeBuilderTest.java

/**
 * make sure that DefaultTreeBuilder.randomAttributes() returns the correct number of attributes, that have not been
 * selected yet/*ww w.j  a v a  2 s. c  o m*/
 */
@Test
public void testRandomAttributes() throws Exception {
    Random rng = RandomUtils.getRandom();
    int nbAttributes = rng.nextInt(100) + 1;
    boolean[] selected = new boolean[nbAttributes];

    for (int nloop = 0; nloop < 100; nloop++) {
        Arrays.fill(selected, false);

        // randomly select some attributes
        int nbSelected = rng.nextInt(nbAttributes - 1);
        for (int index = 0; index < nbSelected; index++) {
            int attr;
            do {
                attr = rng.nextInt(nbAttributes);
            } while (selected[attr]);

            selected[attr] = true;
        }

        int m = rng.nextInt(nbAttributes);

        int[] attrs = DefaultTreeBuilder.randomAttributes(rng, selected, m);

        assertNotNull(attrs);
        assertEquals(Math.min(m, nbAttributes - nbSelected), attrs.length);

        for (int attr : attrs) {
            // the attribute should not be already selected
            assertFalse("an attribute has already been selected", selected[attr]);

            // each attribute should be in the range [0, nbAttributes[
            assertTrue(attr >= 0);
            assertTrue(attr < nbAttributes);

            // each attribute should appear only once
            assertEquals(ArrayUtils.indexOf(attrs, attr), ArrayUtils.lastIndexOf(attrs, attr));
        }
    }
}

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From source file:org.apache.sysml.hops.codegen.opt.PlanSelectionFuseCostBasedV2.java

private static long getNumSkipPlans(boolean[] plan) {
    int pos = ArrayUtils.lastIndexOf(plan, true);
    return UtilFunctions.pow(2, plan.length - pos - 1);
}

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From source file:yoyo.framework.standard.shared.commons.lang.ArrayUtilsTest.java

@Test
public void test() {
    assertThat(ArrayUtils.EMPTY_BOOLEAN_ARRAY.length, is(0));
    assertThat(ArrayUtils.EMPTY_BOOLEAN_OBJECT_ARRAY, is(new Boolean[] {}));
    boolean[] testee = ArrayUtils.add(null, true);
    assertThat(ArrayUtils.clone(testee), is(testee));
    assertThat(ArrayUtils.contains(testee, true), is(true));
    assertThat(ArrayUtils.contains(testee, false), is(false));
    assertThat(ArrayUtils.getLength(testee), is(1));
    assertThat(ArrayUtils.hashCode(testee), is(not(nullValue())));
    assertThat(ArrayUtils.indexOf(testee, true), is(not(ArrayUtils.INDEX_NOT_FOUND)));
    assertThat(ArrayUtils.indexOf(testee, false), is(ArrayUtils.INDEX_NOT_FOUND));
    assertThat(ArrayUtils.isEmpty(testee), is(false));
    assertThat(ArrayUtils.isEmpty(ArrayUtils.EMPTY_BOOLEAN_ARRAY), is(true));
    assertThat(ArrayUtils.isEquals(testee, new boolean[] { true }), is(true));
    assertThat(ArrayUtils.isNotEmpty(testee), is(true));
    assertThat(ArrayUtils.isSameLength(testee, new boolean[] { true }), is(true));
    assertThat(ArrayUtils.isSameType(testee, new boolean[] { true }), is(true));
    assertThat(ArrayUtils.lastIndexOf(testee, true), is(not(ArrayUtils.INDEX_NOT_FOUND)));
    assertThat(ArrayUtils.lastIndexOf(testee, false), is(ArrayUtils.INDEX_NOT_FOUND));
    boolean[] booleanNull = null;
    assertThat(ArrayUtils.nullToEmpty(booleanNull), is(ArrayUtils.EMPTY_BOOLEAN_ARRAY));
    assertThat(ArrayUtils.remove(testee, 0), is(ArrayUtils.EMPTY_BOOLEAN_ARRAY));
    assertThat(ArrayUtils.removeAll(testee, 0), is(ArrayUtils.EMPTY_BOOLEAN_ARRAY));
    assertThat(ArrayUtils.removeElement(testee, true), is(ArrayUtils.EMPTY_BOOLEAN_ARRAY));
    assertThat(ArrayUtils.removeElement(testee, false), is(testee));
    assertThat(ArrayUtils.removeElements(testee, true, false), is(ArrayUtils.EMPTY_BOOLEAN_ARRAY));
}

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