InputStreams.java

/*******************************************************************************
 * Copyright (c) 2009, 2025 Mountainminds GmbH & Co. KG and Contributors
 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *    Evgeny Mandrikov - initial API and implementation
 *
 *******************************************************************************/
package org.jacoco.core.internal;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * Utilities for {@link InputStream}s.
 */
public final class InputStreams {

    private InputStreams() {
    }

    /**
     * Reads all bytes from an input stream into a byte array. The provided
     * {@link InputStream} is not closed by this method.
     *
     * @param is
     *            the input stream to read from
     * @return a byte array containing all the bytes from the stream
     * @throws IOException
     *             if an I/O error occurs
     */
    public static byte[] readFully(final InputStream is) throws IOException {
        final byte[] buf = new byte[1024];
        final ByteArrayOutputStream out = new ByteArrayOutputStream();
        while (true) {
            final int r = is.read(buf);
            if (r == -1) {
                break;
            }
            out.write(buf, 0, r);
        }
        return out.toByteArray();
    }

}