{* ../../docs_src/security/tutorial005_an_py310.py hl[106,108:116] *}

## Verify the `username` and data shape { #verify-the-username-and-data-shape }

We verify that we get a `username`, and extract the scopes.

h3. Plugins

* Execution model
* Metadata model
* Metadata tooling
 ** Metadata extractor
 ** Metadata reader
 ** Metadata writer
 ** Metadata adapter (if required for the target system)
* Maven packaging and lifecycle
* Maven test harness for plugin execution model
* Eclipse IDE tooling for plugin execution model and metadata model

- we also seem to have information like the plugin lifecycle model that's buried inside the maven execution model

            int nextEntryOffset = readInt4(data, offset);
            int action = readInt4(data, offset + 4);
            int fileNameLength = readInt4(data, offset + 8);
            
            // Extract filename
            byte[] fileNameBytes = new byte[fileNameLength];
            System.arraycopy(data, offset + 12, fileNameBytes, 0, fileNameLength);

            <option value="$PROJECT_DIR$/platforms/core-configuration/isolated-action-services" />
            <option value="$PROJECT_DIR$/platforms/core-configuration/java-api-extractor" />
            <option value="$PROJECT_DIR$/platforms/core-configuration/kotlin-dsl" />
            <option value="$PROJECT_DIR$/platforms/core-configuration/kotlin-dsl-integ-tests" />

    val address = factory.newHttpsAddress()
    var routeSelector = newRouteSelector(address)
    val numberOfAddresses = 2
    dns[uriHost] = dns.allocate(numberOfAddresses)

    // Extract the regular sequence of routes from selector.
    val selection1 = routeSelector.next()
    val regularRoutes = selection1.routes

    // Check that we do indeed have more than one route.

   * chain:
   *
   * <pre>
   * Iterables.filter(Throwables.getCausalChain(e), IOException.class));
   * </pre>
   *
   * @param throwable the non-null {@code Throwable} to extract causes from
   * @return an unmodifiable list containing the cause chain starting with {@code throwable}
   * @throws IllegalArgumentException if there is a loop in the causal chain
   */

func IsObjectLockRequested(h http.Header) bool {
	return IsObjectLockLegalHoldRequested(h) || IsObjectLockRetentionRequested(h)
}

// ParseObjectLockRetentionHeaders parses http headers to extract retention mode and retention date
func ParseObjectLockRetentionHeaders(h http.Header) (rmode RetMode, r RetentionDate, err error) {
	retMode := h.Get(AmzObjectLockMode)
	dateStr := h.Get(AmzObjectLockRetainUntilDate)

  static Class<?> getArrayClass(Class<?> componentType) {
    // TODO(user): This is not the most efficient way to handle generic
    // arrays, but is there another way to extract the array class in a
    // non-hacky way (i.e. using String value class names- "[L...")?
    return Array.newInstance(componentType, 0).getClass();
  }

  /*

   * chain:
   *
   * <pre>
   * Iterables.filter(Throwables.getCausalChain(e), IOException.class));
   * </pre>
   *
   * @param throwable the non-null {@code Throwable} to extract causes from
   * @return an unmodifiable list containing the cause chain starting with {@code throwable}
   * @throws IllegalArgumentException if there is a loop in the causal chain
   */

        String relativePath = parentElement.childText(MavenPomElements.Elements.RELATIVE_PATH);
        if (relativePath != null && relativePath.trim().isEmpty()) {
            return false;
        }

        // Extract parent GAV
        String parentGroupId = parentElement.childText(MavenPomElements.Elements.GROUP_ID);
        String parentArtifactId = parentElement.childText(MavenPomElements.Elements.ARTIFACT_ID);