Example usage for java.util.function Predicate test

Introduction

In this page you can find the example usage for java.util.function Predicate test.

Prototype

boolean test(T t);

Source Link

Document

Evaluates this predicate on the given argument.

Usage

From source file:Main.java

public static <T> T removeFrom(Iterable<T> collection, Predicate<T> predicate) {
    Iterator<T> it = collection.iterator();

    while (it.hasNext()) {
        T o = it.next();//from   www  .ja  v  a 2  s .c o m

        if (predicate.test(o)) {
            it.remove();
            return o;
        }
    }

    return null;
}

From source file:Main.java

/** Remove from given list all elements that match given predicate. */
public static <E, L extends Iterable<E>> L filter(L list, Predicate<E> predicate) {
    for (Iterator<? extends E> iter = list.iterator(); iter.hasNext();) {
        E obj = iter.next();/*from   w w w  . ja  va2  s  . c o  m*/
        if (predicate.test(obj)) {
            iter.remove();
        }
    }
    return list;
}

From source file:Main.java

/** Removes from given list the first element that matches given predicate. 
 * @return true if an element was removed, false otherwise. */
public static <E> boolean removeElement(List<? extends E> list, Predicate<E> predicate) {
    for (Iterator<? extends E> iter = list.iterator(); iter.hasNext();) {
        E obj = iter.next();/*from   w  w  w. jav  a 2  s .  c  o m*/
        if (predicate.test(obj)) {
            iter.remove();
            return true;
        }
    }
    return false;
}

From source file:Main.java

private static int fibonacciOperation(Predicate<Integer> condition, BinaryOperator<Integer> operation) {

    int i = 0;/*from   w w w .ja v a 2 s  .co m*/
    int result = 0;
    int fibo = fibonacci(i);
    for (int temp = operation.apply(result, fibo); condition
            .test(temp); fibo = fibonacci(i), temp = operation.apply(result, fibo)) {
        System.out.println(fibo + " ");
        result = temp;
        i++;
    }
    return result;
}

From source file:org.apache.solr.security.TestAuthorizationFramework.java

public static void verifySecurityStatus(HttpClient cl, String url, String objPath, Object expected, int count)
        throws Exception {
    boolean success = false;
    String s = null;//from  w  w  w.  j av a  2 s .c  om
    List<String> hierarchy = StrUtils.splitSmart(objPath, '/');
    for (int i = 0; i < count; i++) {
        HttpGet get = new HttpGet(url);
        s = EntityUtils
                .toString(cl.execute(get, HttpClientUtil.createNewHttpClientRequestContext()).getEntity());
        Map m = (Map) Utils.fromJSONString(s);

        Object actual = Utils.getObjectByPath(m, true, hierarchy);
        if (expected instanceof Predicate) {
            Predicate predicate = (Predicate) expected;
            if (predicate.test(actual)) {
                success = true;
                break;
            }
        } else if (Objects.equals(String.valueOf(actual), expected)) {
            success = true;
            break;
        }
        Thread.sleep(50);
    }
    assertTrue("No match for " + objPath + " = " + expected + ", full response = " + s, success);

}

From source file:net.gtaun.wl.race.util.TrackUtils.java

public static List<Track> filterTracks(List<Track> tracks, Predicate<Track> filter) {
    List<Track> filteredTracks = new ArrayList<>();
    for (Track track : tracks)
        if (filter.test(track))
            filteredTracks.add(track);/*from  w  w w  .  j a va  2  s  .c om*/
    return filteredTracks;
}

From source file:org.zalando.logbook.JsonHttpLogFormatter.java

private static <T> void addUnless(final Map<String, Object> target, final String key, final T element,
        final Predicate<T> predicate) {

    if (!predicate.test(element)) {
        target.put(key, element);//from  w w w  .j  a  va2  s . co  m
    }
}

From source file:Main.java

/**
 * Filter the collection by applying a Predicate to each element. If the
 * predicate returns false, remove the element. If the input collection or
 * predicate is null, there is no change made.
 *
 * @param input/*from  w  w w.  ja v  a2 s  . c om*/
 * @param predicate
 * @param <V>
 * @return
 */
public static <V> void filter(Collection<V> input, Predicate<V> predicate) {

    Iterator<V> iterator = input.iterator();

    while (iterator.hasNext()) {

        V value = iterator.next();

        if (!predicate.test(value)) {
            iterator.remove();
        }

    }

}

From source file:Main.java

public static <T> int removeIf(final List<T> values, final Predicate<T> predicate) {
    int size = values.size();
    int total = 0;

    for (int i = 0; i < size;) {
        final T value = values.get(i);
        if (predicate.test(value)) {
            values.remove(i);//from  w  w w.  j  av a 2s.  c o  m
            total++;
            size--;
        } else {
            i++;
        }
    }

    return total;
}

From source file:Main.java

/**
 * Splits list into several sub-lists according to predicate.
 * @param <T>//w  w  w . j a  v a2  s  .  c om
 * @param list
 * @param predicate
 * @return 
 */
public static final <T> List<List<T>> split(List<T> list, Predicate<T> predicate) {
    if (list.isEmpty()) {
        return Collections.EMPTY_LIST;
    }
    List<List<T>> lists = new ArrayList<>();
    boolean b = predicate.test(list.get(0));
    int len = list.size();
    int start = 0;
    for (int ii = 1; ii < len; ii++) {
        boolean t = predicate.test(list.get(ii));
        if (b != t) {
            lists.add(list.subList(start, ii));
            start = ii;
            b = t;
        }
    }
    lists.add(list.subList(start, len));
    return lists;
}