[BEANUTILS-375] Provide static methods to simplify usage of BeanToPropertyValueTransformer with CollectionUtils

• Type: Improvement
• Status: Reopened
• Priority: Trivial
• Resolution: Unresolved
• Affects Version/s: 1.8.3
• Component/s: Bean-Collections
• Assignee: Unassigned
• Reporter: Tomasz Nurkiewicz
• Created: 25/Apr/10 21:16
• Updated: 11/May/11 05:16

Description

Provide static BeanToPropertyValueTransformer#collect methods to simplify the usage of BeanToPropertyValueTransformer with CollectionUtils#collect. See attached implementation. This is how such a utility method could be used (pay attention to static import):

import org.junit.Test;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Locale;

import static org.apache.commons.beanutils.BeanToPropertyValueTransformer.collect;
import static org.fest.assertions.Assertions.assertThat;

public class TestCollect {

	@Test
	public void proofOfConcept() throws Exception {
		//given
		List<Locale> locales = Arrays.asList(
				Locale.FRANCE,
				Locale.GERMANY,
				Locale.ITALY,
				new Locale("pl", "PL"));

		//when: calls Locale.getCounty() on each item
		Collection countries = collect(locales, "country");

		//then
		assertThat(countries).containsOnly("FR", "DE", "IT", "PL");
	}

}

Without proposed method:

Collection countries = CollectionUtils.collect(locales, new BeanToPropertyValueTransformer("country"))