Example usage for java.util.function BinaryOperator BinaryOperator

Introduction

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

Prototype

BinaryOperator

Source Link

Usage

From source file:org.briljantframework.data.Collectors.java

public static <T> Collector<T, ?, Vector> valueCounts() {
    return Collector.of(HashMap::new, (map, t) -> map.compute(t, (v, c) -> c == null ? 1 : c + 1),
            new BinaryOperator<HashMap<T, Integer>>() {
                @Override//from  w  w w  .j  ava 2 s  .  c om
                public HashMap<T, Integer> apply(HashMap<T, Integer> left, HashMap<T, Integer> right) {
                    right.forEach((k, v) -> left.merge(k, v, (Integer o, Integer n) -> o == null ? n : o + n));
                    return left;
                }
            }, (map) -> {
                Vector.Builder b = new TypeInferenceVectorBuilder();
                for (Map.Entry<T, Integer> e : map.entrySet()) {
                    b.set(e.getKey(), e.getValue());
                }
                return b.build();
            }, Collector.Characteristics.UNORDERED);
}

---