org.hibernate.query.spi.DoubleStreamDecorator Maven / Gradle / Ivy
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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.query.spi;
import java.util.DoubleSummaryStatistics;
import java.util.OptionalDouble;
import java.util.PrimitiveIterator;
import java.util.Spliterator;
import java.util.function.BiConsumer;
import java.util.function.DoubleBinaryOperator;
import java.util.function.DoubleConsumer;
import java.util.function.DoubleFunction;
import java.util.function.DoublePredicate;
import java.util.function.DoubleToIntFunction;
import java.util.function.DoubleToLongFunction;
import java.util.function.DoubleUnaryOperator;
import java.util.function.ObjDoubleConsumer;
import java.util.function.Supplier;
import java.util.stream.DoubleStream;
import java.util.stream.IntStream;
import java.util.stream.LongStream;
import java.util.stream.Stream;
import org.hibernate.Incubating;
/**
* The {@link DoubleStreamDecorator} wraps a Java {@link DoubleStream} and registers a {@code closeHandler}
* which is passed further to any resulting {@link Stream}.
*
* The goal of the {@link DoubleStreamDecorator} is to close the underlying {@link DoubleStream} upon
* calling a terminal operation.
*
* @author Vlad Mihalcea
* @since 5.4
*/
@Incubating
public class DoubleStreamDecorator implements DoubleStream {
private final DoubleStream delegate;
private Runnable closeHandler;
public DoubleStreamDecorator(
DoubleStream delegate,
Runnable closeHandler) {
this.delegate = delegate;
this.closeHandler = closeHandler;
this.delegate.onClose( closeHandler );
}
@Override
public DoubleStream filter(DoublePredicate predicate) {
return new DoubleStreamDecorator(
delegate.filter( predicate ),
closeHandler
);
}
@Override
public DoubleStream map(DoubleUnaryOperator mapper) {
return new DoubleStreamDecorator(
delegate.map( mapper ),
closeHandler
);
}
@Override
public Stream mapToObj(DoubleFunction mapper) {
return new StreamDecorator<>(
delegate.mapToObj( mapper ),
closeHandler
);
}
@Override
public IntStream mapToInt(DoubleToIntFunction mapper) {
return new IntStreamDecorator(
delegate.mapToInt( mapper ),
closeHandler
);
}
@Override
public LongStream mapToLong(DoubleToLongFunction mapper) {
return new LongStreamDecorator(
delegate.mapToLong( mapper ),
closeHandler
);
}
@Override
public DoubleStream flatMap(DoubleFunction mapper) {
return new DoubleStreamDecorator(
delegate.flatMap( mapper ),
closeHandler
);
}
@Override
public DoubleStream distinct() {
return new DoubleStreamDecorator(
delegate.distinct(),
closeHandler
);
}
@Override
public DoubleStream sorted() {
return new DoubleStreamDecorator(
delegate.sorted(),
closeHandler
);
}
@Override
public DoubleStream peek(DoubleConsumer action) {
return new DoubleStreamDecorator(
delegate.peek( action ),
closeHandler
);
}
@Override
public DoubleStream limit(long maxSize) {
return new DoubleStreamDecorator(
delegate.limit( maxSize ),
closeHandler
);
}
@Override
public DoubleStream skip(long n) {
return new DoubleStreamDecorator(
delegate.skip( n ),
closeHandler
);
}
@Override
public void forEach(DoubleConsumer action) {
delegate.forEach( action );
close();
}
@Override
public void forEachOrdered(DoubleConsumer action) {
delegate.forEachOrdered( action );
close();
}
@Override
public double[] toArray() {
double[] result = delegate.toArray();
close();
return result;
}
@Override
public double reduce(double identity, DoubleBinaryOperator op) {
double result = delegate.reduce( identity, op );
close();
return result;
}
@Override
public OptionalDouble reduce(DoubleBinaryOperator op) {
OptionalDouble result = delegate.reduce( op );
close();
return result;
}
@Override
public R collect(
Supplier supplier, ObjDoubleConsumer accumulator, BiConsumer combiner) {
R result = delegate.collect( supplier, accumulator, combiner );
close();
return result;
}
@Override
public double sum() {
double result = delegate.sum();
close();
return result;
}
@Override
public OptionalDouble min() {
OptionalDouble result = delegate.min();
close();
return result;
}
@Override
public OptionalDouble max() {
OptionalDouble result = delegate.max();
close();
return result;
}
@Override
public long count() {
long result = delegate.count();
close();
return result;
}
@Override
public OptionalDouble average() {
OptionalDouble result = delegate.average();
close();
return result;
}
@Override
public DoubleSummaryStatistics summaryStatistics() {
DoubleSummaryStatistics result = delegate.summaryStatistics();
close();
return result;
}
@Override
public boolean anyMatch(DoublePredicate predicate) {
boolean result = delegate.anyMatch( predicate );
close();
return result;
}
@Override
public boolean allMatch(DoublePredicate predicate) {
boolean result = delegate.allMatch( predicate );
close();
return result;
}
@Override
public boolean noneMatch(DoublePredicate predicate) {
boolean result = delegate.noneMatch( predicate );
close();
return result;
}
@Override
public OptionalDouble findFirst() {
OptionalDouble result = delegate.findFirst();
close();
return result;
}
@Override
public OptionalDouble findAny() {
OptionalDouble result = delegate.findAny();
close();
return result;
}
@Override
public Stream boxed() {
return new StreamDecorator<>(
delegate.boxed(),
closeHandler
);
}
@Override
public DoubleStream sequential() {
return new DoubleStreamDecorator(
delegate.sequential(),
closeHandler
);
}
@Override
public DoubleStream parallel() {
return new DoubleStreamDecorator(
delegate.parallel(),
closeHandler
);
}
@Override
public DoubleStream unordered() {
return new DoubleStreamDecorator(
delegate.unordered(),
closeHandler
);
}
@Override
public DoubleStream onClose(Runnable closeHandler) {
this.closeHandler = closeHandler;
return this;
}
@Override
public void close() {
delegate.close();
}
@Override
public PrimitiveIterator.OfDouble iterator() {
return delegate.iterator();
}
@Override
public Spliterator.OfDouble spliterator() {
return delegate.spliterator();
}
@Override
public boolean isParallel() {
return delegate.isParallel();
}
}