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Wrappers for PrintStream with copy, redirect, filter and passthrough implementations.

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/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2018 Paul Campbell
 *
 * 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 net.kemitix.wrapper.printstream;

import lombok.RequiredArgsConstructor;

import java.util.function.Consumer;
import java.util.stream.IntStream;

/**
 * Represents a segment of a buffer of bytes.
 *
 * @author Paul Campbell ([email protected])
 */
@RequiredArgsConstructor
class ByteBufferSegment {

    private final byte[] buf;

    private final int off;

    private final int len;

    /**
     * Scan the buffer, from off to len, and give it to the byteConsumer.
     *
     * @param byteConsumer the consumer to process each byte
     */
    public void forEach(final Consumer byteConsumer) {
        if ((len < 0) || (buf.length < (off + len))) {
            throw new IndexOutOfBoundsException(
                    String.format("buf.length: %d, off: %d, len: %d", buf.length, off, len));
        }
        IntStream.range(off, off + len)
                .map(i -> buf[i])
                .forEach(b -> byteConsumer.accept((byte) b));
    }
}