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The module for FunctionalJ Core.
There is a newer version: 1.0.17
// ============================================================================
// Copyright (c) 2017-2021 Nawapunth Manusitthipol (NawaMan - http://nawaman.net).
// ----------------------------------------------------------------------------
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
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// The above copyright notice and this permission notice shall be included in all
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// ============================================================================
package functionalj.stream.doublestream.collect;

import java.util.function.ObjDoubleConsumer;

import functionalj.stream.collect.Collected;


public interface DoubleCollectedToInt extends Collected, DoubleCollected {
    
    public static  DoubleCollectedToInt of(DoubleCollectorToIntPlus collector) {
        return new DoubleCollectedToInt.Impl<>(collector);
    }
    
    //== Instance ==
    
    public void accumulate(double each);
    public int  finishAsInt();
    
    public default Integer finish() {
        return finishAsInt();
    }
    
    public default void accumulate(Double each) {
        accumulate(each);
    }
    
    //== Implementation ==
    
    public static class Impl implements DoubleCollectedToInt {
        
        private final DoubleCollectorToIntPlus collector;
        private final ObjDoubleConsumer        accumulator;
        private final ACCUMULATED                           accumulated;
        
        public Impl(DoubleCollectorToIntPlus collector) {
            this.collector   = collector;
            this.accumulated = collector.supplier().get();
            this.accumulator = collector.doubleAccumulator();
        }
        
        public void accumulate(double each) {
            accumulator.accept(accumulated, each);
        }
        
        @Override
        public int finishAsInt() {
            return collector.finisher().apply(accumulated);
        }
        
    }
    
}