Example usage for org.apache.commons.collections4.functors ComparatorPredicate ComparatorPredicate

Introduction

In this page you can find the example usage for org.apache.commons.collections4.functors ComparatorPredicate ComparatorPredicate.

Prototype

public ComparatorPredicate(final T object, final Comparator<T> comparator, final Criterion criterion) 

Source Link

Document

Constructor that performs no validation.

Usage

From source file:com.feilong.core.util.AggregateUtilTest.java

/**
 * Test sum4.//from  w w  w.ja  va 2  s.  c  o m
 */
@Test
public void testSum4() {
    List<User> list = toList(//
            new User(2L), new User(50L), new User(50L));

    BigDecimal expected = new BigDecimal(100L);
    assertEquals(expected, AggregateUtil.sum(list, "id", new Predicate<User>() {

        @Override
        public boolean evaluate(User user) {
            return user.getId() > 10L;
        }
    }));

    //*****************************************************************

    Predicate<Long> predicate = new ComparatorPredicate<Long>(10L, ComparatorUtils.<Long>naturalComparator(),
            Criterion.LESS);
    BigDecimal sum = AggregateUtil.sum(list, "id", new BeanPredicate<User>("id", predicate));
    assertEquals(new BigDecimal(100L), sum);
}

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From source file:com.feilong.core.util.AggregateUtilTest.java

/**
 * TestStatisticsUtilTest.//  w ww. j ava  2 s  .co m
 */
@Test
public void testStatisticsUtilTest() {
    String[] planets = { "Mercury", "Venus", "Earth", "Mars" };
    Comparator<String> distanceFromSun = new FixedOrderComparator<>(planets);
    Predicate<String> predicate = new ComparatorPredicate<String>("Venus", distanceFromSun, Criterion.GREATER);

    LOGGER.debug("{}", predicate.evaluate("Earth"));
}

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From source file:com.feilong.core.util.AggregateUtilTest.java

@Test
public void testStatisticsUtilTest1() {

    // >10 /* w ww  . jav  a2  s  .  c  o m*/
    Predicate<Integer> predicate = new ComparatorPredicate<Integer>(10,
            ComparatorUtils.<Integer>naturalComparator(), Criterion.LESS);

    List<Integer> result = CollectionsUtil.select(toList(1, 5, 10, 30, 55, 88, 1, 12, 3), predicate);
    LOGGER.debug(JsonUtil.format(result, 0, 0));
}

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From source file:com.feilong.core.util.predicate.BeanPredicateUtil.java

/**
 * Comparator predicate./*from  w  w  w.  ja  v  a2  s  .c o  m*/
 * 
 * <p>
 * <code>valueToCompare</code>  ???t<code>propertyName</code>,( <code>comparator</code> )<br>
 * ?, <code><b>comparator.compare(valueToCompare, propertyValue)</b></code>
 * </p>
 * 
 * <h3> {@link Criterion}:</h3>
 * 
 * <blockquote>
 * <table border="1" cellspacing="0" cellpadding="4" summary="">
 * 
 * <tr style="background-color:#ccccff">
 * <th align="left"></th>
 * <th align="left"></th>
 * </tr>
 * 
 * 
 * <tr valign="top">
 * <td>{@link Criterion#EQUAL}</td>
 * <td>comparator.compare(valueToCompare, propertyValue) == 0</td>
 * </tr>
 * 
 * <tr valign="top" style="background-color:#eeeeff">
 * <td>{@link Criterion#LESS}</td>
 * <td>comparator.compare(valueToCompare, propertyValue) < 0</td>
 * </tr>
 * 
 * <tr valign="top">
 * <td>{@link Criterion#GREATER}</td>
 * <td>comparator.compare(valueToCompare, propertyValue) > 0</td>
 * </tr>
 * 
 * <tr valign="top" style="background-color:#eeeeff">
 * <td>{@link Criterion#GREATER_OR_EQUAL}</td>
 * <td>comparator.compare(valueToCompare, propertyValue) >= 0</td>
 * </tr>
 * 
 * <tr valign="top">
 * <td>{@link Criterion#LESS_OR_EQUAL}</td>
 * <td>comparator.compare(valueToCompare, propertyValue) <= 0</td>
 * </tr>
 * 
 * </table>
 * </blockquote>
 *
 * @param <T>
 *            the generic type
 * @param <V>
 *            the value type
 * @param propertyName
 *            T??,Possibly indexed and/or nested name of the property to be modified,??
 *            <a href="../../bean/BeanUtil.html#propertyName">propertyName</a>
 * @param valueToCompare
 *            the value to compare
 * @param comparator
 *            the comparator
 * @param criterion
 *            the criterion
 * @return  <code>propertyName</code> null, {@link NullPointerException}<br>
 *          <code>propertyName</code> blank, {@link IllegalArgumentException}<br>
 * @see org.apache.commons.collections4.functors.ComparatorPredicate
 * @since commons-collections 4
 */
public static <T, V extends Comparable<? super V>> Predicate<T> comparatorPredicate(String propertyName,
        V valueToCompare, Comparator<V> comparator, Criterion criterion) {
    return new BeanPredicate<T>(propertyName,
            new ComparatorPredicate<V>(valueToCompare, comparator, criterion));
}

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