Example usage for org.apache.commons.collections4 TransformerUtils constantTransformer

Introduction

In this page you can find the example usage for org.apache.commons.collections4 TransformerUtils constantTransformer.

Prototype

public static <I, O> Transformer<I, O> constantTransformer(final O constantToReturn) 

Source Link

Document

Creates a Transformer that will return the same object each time the transformer is used.

Usage

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

/**
 * Test collect3./* www . ja  v a 2 s  . c  o m*/
 */
@Test
public void testCollect3() {
    List<User> list = toList(//
            new User("", 23), new User("", 24), new User("", 25));

    List<String> collect1 = CollectionsUtil.collect(list, TransformerUtils.constantTransformer("jintian"));
    assertThat(collect1, hasItems("jintian", "jintian", "jintian"));
}

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From source file:uniol.apt.analysis.processmining.CreateLTSTest.java

@Test
public void createABAndBAWithConstantPV() {
    Transformer<ParikhVector, ParikhVector> constantTransformer = TransformerUtils
            .constantTransformer(new ParikhVector());
    CreateLTS create = new CreateLTS(constantTransformer);
    create.addWord(Arrays.asList("a", "b"));
    create.addWord(Arrays.asList("b", "a"));
    TransitionSystem ts = create.getTransitionSystem();

    assertThat(ts, not(sameInstance(create.getTransitionSystem())));
    assertThat(ts.getNodes(), hasSize(1));
    assertThat(ts.getEdges(), hasSize(2));
    assertThat(ts.getInitialState(), not(nullValue()));

    assertThat(ts.getAlphabet(), containsInAnyOrder("a", "b"));

    State s0 = ts.getInitialState();
    assertThat(s0.getPostsetNodesByLabel("a"), hasSize(1));
    assertThat(s0.getPostsetNodesByLabel("b"), hasSize(1));
}

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