/*
 * Copyright (c) 2018 Goldman Sachs and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompany this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */

package org.eclipse.collections.impl.block.factory;

import java.util.Collection;
import java.util.DoubleSummaryStatistics;
import java.util.IntSummaryStatistics;
import java.util.LongSummaryStatistics;

import org.eclipse.collections.api.block.function.Function;
import org.eclipse.collections.api.block.function.Function0;
import org.eclipse.collections.api.block.function.Function3;
import org.eclipse.collections.api.block.function.primitive.DoubleFunction;
import org.eclipse.collections.api.block.function.primitive.FloatFunction;
import org.eclipse.collections.api.block.function.primitive.IntFunction;
import org.eclipse.collections.api.block.function.primitive.LongFunction;
import org.eclipse.collections.api.block.procedure.Procedure;
import org.eclipse.collections.api.block.procedure.Procedure2;
import org.eclipse.collections.impl.block.procedure.checked.CheckedProcedure2;
import org.eclipse.collections.impl.block.procedure.checked.ThrowingProcedure2;

Contains factory methods for creating Procedure2 instances.
/** * Contains factory methods for creating {@link Procedure2} instances. */
public final class Procedures2 { public static final Procedure2<?, ?> ADD_TO_COLLECTION = new AddToCollection<>(); public static final Procedure2<?, ?> REMOVE_FROM_COLLECTION = new RemoveFromCollection<>(); private Procedures2() { throw new AssertionError("Suppress default constructor for noninstantiability"); }
Allows a lambda or anonymous inner class that needs to throw a checked exception to be safely wrapped as a Procedure2 that will throw a RuntimeException, wrapping the checked exception that is the cause.
/** * Allows a lambda or anonymous inner class that needs to throw a checked exception to be safely wrapped as a * Procedure2 that will throw a RuntimeException, wrapping the checked exception that is the cause. */
public static <T, P> Procedure2<T, P> throwing(ThrowingProcedure2<T, P> throwingProcedure2) { return new ThrowingProcedure2Adapter<>(throwingProcedure2); }
Allows a lambda or anonymous inner class that needs to throw a checked exception to be safely wrapped as a Procedure2 that will throw a user specified RuntimeException based on the provided function. The function is passed the current element and the checked exception that was thrown as context arguments.
/** * Allows a lambda or anonymous inner class that needs to throw a checked exception to be safely wrapped as a * Procedure2 that will throw a user specified RuntimeException based on the provided function. The function * is passed the current element and the checked exception that was thrown as context arguments. */
public static <T1, T2> Procedure2<T1, T2> throwing( ThrowingProcedure2<T1, T2> throwingProcedure, Function3<T1, T2, ? super Throwable, ? extends RuntimeException> rethrow) { return (one, two) -> { try { throwingProcedure.safeValue(one, two); } catch (RuntimeException e) { throw e; } catch (Throwable t) { throw rethrow.value(one, two, t); } }; } public static <T, P> Procedure2<T, P> fromProcedure(Procedure<? super T> procedure) { return new ProcedureAdapter<>(procedure); } public static <T> Procedure2<T, Collection<T>> addToCollection() { return (Procedure2<T, Collection<T>>) ADD_TO_COLLECTION; } public static <T> Procedure2<T, Collection<T>> removeFromCollection() { return (Procedure2<T, Collection<T>>) REMOVE_FROM_COLLECTION; }
Since:9.2.
/** * Use with {@link org.eclipse.collections.api.RichIterable#aggregateInPlaceBy(Function, Function0, Procedure2)} * * @since 9.2. */
public static <T> Procedure2<DoubleSummaryStatistics, T> summarizeDouble(DoubleFunction<T> function) { return (DoubleSummaryStatistics dss, T value) -> dss.accept(function.doubleValueOf(value)); }
Since:9.2.
/** * Use with {@link org.eclipse.collections.api.RichIterable#aggregateInPlaceBy(Function, Function0, Procedure2)} * * @since 9.2. */
public static <T> Procedure2<DoubleSummaryStatistics, T> summarizeFloat(FloatFunction<T> function) { return (DoubleSummaryStatistics dss, T value) -> dss.accept((double) function.floatValueOf(value)); }
Since:9.2.
/** * Use with {@link org.eclipse.collections.api.RichIterable#aggregateInPlaceBy(Function, Function0, Procedure2)} * * @since 9.2. */
public static <T> Procedure2<IntSummaryStatistics, T> summarizeInt(IntFunction<T> function) { return (IntSummaryStatistics iss, T value) -> iss.accept(function.intValueOf(value)); }
Since:9.2.
/** * Use with {@link org.eclipse.collections.api.RichIterable#aggregateInPlaceBy(Function, Function0, Procedure2)} * * @since 9.2. */
public static <T> Procedure2<LongSummaryStatistics, T> summarizeLong(LongFunction<T> function) { return (LongSummaryStatistics lss, T value) -> lss.accept(function.longValueOf(value)); } private static final class ProcedureAdapter<T, P> implements Procedure2<T, P> { private static final long serialVersionUID = 1L; private final Procedure<? super T> procedure; private ProcedureAdapter(Procedure<? super T> procedure) { this.procedure = procedure; } @Override public void value(T each, P parameter) { this.procedure.value(each); } } private static class AddToCollection<T> implements Procedure2<T, Collection<T>> { private static final long serialVersionUID = 1L; @Override public void value(T each, Collection<T> target) { target.add(each); } } private static class RemoveFromCollection<T> implements Procedure2<T, Collection<T>> { private static final long serialVersionUID = 1L; @Override public void value(T each, Collection<T> target) { target.remove(each); } } private static final class ThrowingProcedure2Adapter<T, P> extends CheckedProcedure2<T, P> { private static final long serialVersionUID = 1L; private final ThrowingProcedure2<T, P> throwingProcedure2; private ThrowingProcedure2Adapter(ThrowingProcedure2<T, P> throwingProcedure2) { this.throwingProcedure2 = throwingProcedure2; } @Override public void safeValue(T object, P parameter) throws Exception { this.throwingProcedure2.safeValue(object, parameter); } } }