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// ============================================================================
// 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
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
// ============================================================================
package functionalj.stream.collect;
import java.util.Set;
import java.util.function.BiConsumer;
import java.util.function.BinaryOperator;
import java.util.function.DoubleFunction;
import java.util.function.Function;
import java.util.function.IntFunction;
import java.util.function.LongFunction;
import java.util.function.ObjDoubleConsumer;
import java.util.function.ObjIntConsumer;
import java.util.function.ObjLongConsumer;
import java.util.function.Supplier;
import java.util.function.ToLongFunction;
import java.util.stream.Collector;
import java.util.stream.Collector.Characteristics;
import functionalj.stream.doublestream.collect.DoubleCollectorToLongPlus;
import functionalj.stream.intstream.collect.IntCollectorToLongPlus;
import functionalj.stream.longstream.collect.LongCollectorToLongPlus;
import lombok.val;
abstract public class DerivedCollectorToLongPlus {
final CollectorToLongPlus collector;
protected DerivedCollectorToLongPlus(CollectorToLongPlus collector) {
this.collector = collector;
}
public Supplier supplier() {
return collector.supplier();
}
public BinaryOperator combiner() {
return collector.combiner();
}
public ToLongFunction finisherToLong() {
return collector.finisherToLong();
}
public Function finisher() {
return a -> finisherToLong().applyAsLong(a);
}
public Set characteristics() {
return collector.characteristics();
}
//== Implementations ==
public static class FromObj
extends DerivedCollectorToLongPlus
implements CollectorToLongPlus {
private final Function mapper;
public FromObj(
CollectorToLongPlus collector,
Function mapper) {
super(collector);
this.mapper = mapper;
}
@SuppressWarnings("unchecked")
@Override
public BiConsumer accumulator() {
@SuppressWarnings("rawtypes")
val accumulator = (BiConsumer)collector.accumulator();
return (a, s) -> {
val d = mapper.apply(s);
accumulator.accept(a, d);
};
}
@Override
public Collector collector() {
return this;
}
}
public static class FromInt
extends DerivedCollectorToLongPlus
implements IntCollectorToLongPlus {
private final IntFunction mapper;
public FromInt(
CollectorToLongPlus collector,
IntFunction mapper) {
super(collector);
this.mapper = mapper;
}
@SuppressWarnings({ "unchecked", "rawtypes" })
@Override
public ObjIntConsumer intAccumulator() {
val accumulator = (BiConsumer)collector.accumulator();
return (a, s) -> {
val d = mapper.apply(s);
accumulator.accept(a, d);
};
}
}
public static class FromLong
extends DerivedCollectorToLongPlus
implements LongCollectorToLongPlus {
private final LongFunction mapper;
public FromLong(
CollectorToLongPlus collector,
LongFunction mapper) {
super(collector);
this.mapper = mapper;
}
@SuppressWarnings({ "unchecked", "rawtypes" })
@Override
public ObjLongConsumer longAccumulator() {
val accumulator = (BiConsumer)collector.accumulator();
return (a, s) -> {
val d = mapper.apply(s);
accumulator.accept(a, d);
};
}
}
public static class FromDouble
extends DerivedCollectorToLongPlus
implements DoubleCollectorToLongPlus {
private final DoubleFunction mapper;
public FromDouble(
CollectorToLongPlus collector,
DoubleFunction mapper) {
super(collector);
this.mapper = mapper;
}
@SuppressWarnings({ "unchecked", "rawtypes" })
@Override
public ObjDoubleConsumer doubleAccumulator() {
val accumulator = (BiConsumer)collector.accumulator();
return (a, s) -> {
val d = mapper.apply(s);
accumulator.accept(a, d);
};
}
}
}
