* @param algorithms  The checksum algorithms to use, must not be {@code null}.
     * @return The calculated checksums, indexed by algorithms, never {@code null}.
     * @throws NullPointerException if passed in any parameter is {@code null}.
     */
    @Nonnull
    Map<ChecksumAlgorithm, String> calculate(@Nonnull byte[] data, @Nonnull Collection<ChecksumAlgorithm> algorithms);

    /**

                file.deleteOnExit();
            }
        }
    }

    private ChecksumObserver addChecksumObserver(Wagon wagon, String algorithm) throws TransferFailedException {
        try {
            ChecksumObserver checksumObserver = new ChecksumObserver(algorithm);
            wagon.addTransferListener(checksumObserver);
            return checksumObserver;
        } catch (NoSuchAlgorithmException e) {

        private final org.eclipse.aether.spi.connector.checksum.ChecksumAlgorithm algorithm;

        DefaultChecksumCalculator(org.eclipse.aether.spi.connector.checksum.ChecksumAlgorithm algorithm) {
            this.algorithm = algorithm;
        }

        @Override
        public void update(ByteBuffer input) {
            algorithm.update(input);
        }

        @Override
        public String checksum() {

        private final org.eclipse.aether.spi.connector.checksum.ChecksumAlgorithm algorithm;

        DefaultChecksumCalculator(org.eclipse.aether.spi.connector.checksum.ChecksumAlgorithm algorithm) {
            this.algorithm = algorithm;
        }

        @Override
        public void update(ByteBuffer input) {
            algorithm.update(input);
        }

        @Override
        public String checksum() {

                    // More than one filtered value, and we don't know how to handle at least one of them.
                    // TODO: add a plugin mechanism for allowing plugin to specify their selection algorithm.
                    return Optional.empty();
                }
            }
        }
        if (classes & modules) {
            selected = getPathType(path);
        }

     * be null instead of the actual module name. This option can avoid the cost of reading module
     * descriptors when only the modules existence needs to be verified.</p>
     *
     * <p><b>Algorithm:</b>
     * If the given path is a directory, then there is a choice:
     * </p>
     * <ul>
     *   <li><b>Package hierarchy:</b> if a {@code module-info.class} file is found at the root,

     * be null instead of the actual module name. This option can avoid the cost of reading module
     * descriptors when only the modules existence needs to be verified.</p>
     *
     * <p><b>Algorithm:</b>
     * If the given path is a directory, then there is a choice:
     * </p>
     * <ul>
     *   <li><b>Package hierarchy:</b> if a {@code module-info.class} file is found at the root,

is to retrieve an object reference to the LogFactory instance that will be used to create Log instances for this application. This is normally accomplished by calling the static getFactory() method. This method implements the following discovery algorithm to select the name of the LogFactory implementation class this application wants to use: Check for a system property named org.apache.commons.logging.LogFactory. Use the JDK 1.3 JAR Services Discovery mechanism (see http://java.sun.com/j2se/1.3/...

      <version>1.0.0+</version>
      <description>Mapping information for a single plugin within this group.</description>
      <comment>NOTE: plugin version is _NOT_ included here, since it is resolved using a separate algorithm in plugins' artifact.</comment>
      <fields>
        <field>
          <name>name</name>
          <type>String</type>
          <required>true</required>
          <version>1.0.0+</version>

is to retrieve an object reference to the LogFactory instance that will be used to create Log instances for this application. This is normally accomplished by calling the static getFactory() method. This method implements the following discovery algorithm to select the name of the LogFactory implementation class this application wants to use: Check for a system property named org.apache.commons.logging.LogFactory. Use the JDK 1.3 JAR Services Discovery mechanism (see http://java.sun.com/j2se/1.3/...