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/*
* Copyright (C) 2014-2024 Philip Helger (www.helger.com)
* philip[at]helger[dot]com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.helger.commons.functional;
import java.util.function.Consumer;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
/**
* Represents an operation that accepts a single {@code char}-valued argument
* and returns no result. This is the primitive type specialization of
* {@link Consumer} for {@code char}. Unlike most other functional interfaces,
* {@code ICharConsumer} is expected to operate via side-effects.
*
* This is a functional interface whose functional method is
* {@link #accept(char)}.
*
* @see Consumer
* @since 8.0.0
*/
@FunctionalInterface
public interface ICharConsumer
{
/**
* Performs this operation on the given argument.
*
* @param value
* the input argument
*/
void accept (char value);
/**
* Returns a composed {@code CharConsumer} that performs, in sequence, this
* operation followed by the {@code after} operation. If performing either
* operation throws an exception, it is relayed to the caller of the composed
* operation. If performing this operation throws an exception, the
* {@code after} operation will not be performed.
*
* @param after
* the operation to perform after this operation
* @return a composed {@code CharConsumer} that performs in sequence this
* operation followed by the {@code after} operation
* @throws NullPointerException
* if {@code after} is null
*/
@Nonnull
default ICharConsumer andThen (@Nullable final ICharConsumer after)
{
return and (this, after);
}
@Nullable
static ICharConsumer and (@Nullable final ICharConsumer aFirst, @Nullable final ICharConsumer aSecond)
{
if (aFirst != null)
{
if (aSecond != null)
return x -> {
aFirst.accept (x);
aSecond.accept (x);
};
return aFirst;
}
return aSecond;
}
}