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

Introduction

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

Prototype

public static <I, O> Transformer<I, O> nullTransformer() 

Source Link

Document

Gets a transformer that always returns null.

Usage

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

/**
 * Test collect.//w w  w . j a  va  2  s  . co m
 */
@Test
public void testCollect() {
    List<String> list = toList("xinge", "feilong1", "feilong2", "feilong2");

    Transformer<String, Object> nullTransformer = TransformerUtils.nullTransformer();
    List<Object> collect = CollectionsUtil.collect(list, nullTransformer);

    Object[] objects = { null, null, null, null };
    assertThat(collect, hasItems(objects));
}

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