How to use

toMap

method

in

com.wizzardo.tools.collections.flow.FlowGrouping

public FlowToMap<K, List<T>, B> toMap() {
  return toMap(Flow.<K, T>flowGroupListMapper());
}

public <K, V> FlowToMap<K, V, FlowGroup<K, B>> toMap(Supplier<Map<K, FlowGroup<K, B>>> groupMapSupplier, Mapper<B, K> toKey, Mapper<FlowGroup<K, B>, V> toValue) {
  return groupBy(toKey, groupMapSupplier).toMap(toValue);
}

public FlowToMap<K, List<T>, B> toMap() {
  return toMap(Flow.<K, T>flowGroupListMapper());
}

public <K, V> FlowToMap<K, V, FlowGroup<K, B>> toMap(Supplier<Map<K, FlowGroup<K, B>>> groupMapSupplier, Mapper<B, K> toKey, Mapper<FlowGroup<K, B>, V> toValue) {
  return groupBy(toKey, groupMapSupplier).toMap(toValue);
}

@Test
public void test_toMap_2() {
  Map<Boolean, List<Integer>> map = Flow.of(1, 2, 3)
      .groupBy(new Mapper<Integer, Boolean>() {
        @Override
        public Boolean map(Integer integer) {
          return integer % 2 == 0;
        }
      })
      .toMap()
      .get();
  Assert.assertEquals(2, map.size());
  Assert.assertEquals(1, map.get(true).size());
  Assert.assertEquals(Integer.valueOf(2), map.get(true).get(0));
  Assert.assertEquals(2, map.get(false).size());
  Assert.assertEquals(Integer.valueOf(1), map.get(false).get(0));
  Assert.assertEquals(Integer.valueOf(3), map.get(false).get(1));
}

.toMap(new Mapper<FlowGroup<Integer, Person>, Map<Long, List<Person>>>() {
  @Override
  public Map<Long, List<Person>> map(FlowGroup<Integer, Person> ageGroup) {

@Test
public void test_toMap_3() {
  Map<Boolean, List<Integer>> map = Flow.of(1, 2, 3)
      .groupBy(new Mapper<Integer, Boolean>() {
        @Override
        public Boolean map(Integer integer) {
          return integer % 2 == 0;
        }
      })
      .filter(new Filter<FlowGroup<Boolean, Integer>>() {
        @Override
        public boolean allow(FlowGroup<Boolean, Integer> group) {
          return group.getKey();
        }
      })
      .toMap()
      .get();
  Assert.assertEquals(1, map.size());
  Assert.assertEquals(1, map.get(true).size());
  Assert.assertEquals(Integer.valueOf(2), map.get(true).get(0));
}

@Test
public void test_limit_3() {
  Assert.assertEquals("{1=[1], 2=[2], 3=[3]}", Flow.of(1, 2, 3, 4, 5)
      .groupBy(new Mapper<Integer, Integer>() {
        @Override
        public Integer map(Integer integer) {
          return integer;
        }
      })
      .limit(3)
      .toMap()
      .get()
      .toString()
  );
}