try {
            versionConstraint =
                    versionScheme.parseVersionConstraint(request.getArtifact().getVersion());
        } catch (InvalidVersionSpecificationException e) {
            result.addException(e);
            throw new VersionRangeResolutionException(result);
        }

        result.setVersionConstraint(versionConstraint);

        if (versionConstraint.getRange() == null) {

                pomArtifact = pomArtifact.setVersion(versionResult.getVersion());
            } catch (VersionResolutionException e) {
                result.addException(e);
                throw new ArtifactDescriptorException(result);
            }

            if (!visited.add(a.getGroupId() + ':' + a.getArtifactId() + ':' + a.getBaseVersion())) {

            Map<String, VersionInfo> infos = new HashMap<>();

            for (MetadataResult metadataResult : metadataResults) {
                result.addException(metadataResult.getException());

                ArtifactRepository repository = metadataResult.getRequest().getRepository();
                if (repository == null) {

        return this;
    }

    public List<Throwable> getExceptions() {
        return exceptions;
    }

    public MavenExecutionResult addException(Throwable t) {
        exceptions.add(t);

        return this;
    }

    public boolean hasExceptions() {
        return !getExceptions().isEmpty();
    }

                } catch (FileNotFoundException | URISyntaxException e) {
                    throw new IllegalStateException("Missing test POM for " + artifact, e);
                }
            } else {
                result.addException(new ArtifactNotFoundException(artifact, (RemoteRepository) null));
                throw new ArtifactResolutionException(results);
            }
        }

        return results;
    }

    // - project building exception
    // - invalid project model exception: list of markers
    // - xmlpull parser exception
    List<Throwable> getExceptions();

    MavenExecutionResult addException(Throwable e);

    boolean hasExceptions();

    /**
     * Gets the build summary for the specified project.
     *
     * @param project The project to get the build summary for, must not be {@code null}.

          dir.deleteDirectory(path);
        }
      } else {
        dir.deleteFile(path);
      }

      return exceptions;
    } catch (IOException e) {
      return addException(exceptions, e);
    }
  }

  /**
   * Secure method for deleting the contents of a directory using {@code SecureDirectoryStream}.

          dir.deleteDirectory(path);
        }
      } else {
        dir.deleteFile(path);
      }

      return exceptions;
    } catch (IOException e) {
      return addException(exceptions, e);
    }
  }

  /**
   * Secure method for deleting the contents of a directory using {@code SecureDirectoryStream}.

                    && recorder.hasReachedMaxLevel()) {
                event.getSession()
                        .getResult()
                        .addException(
                                new Exception("Build failed due to log statements with a higher severity than allowed. "
                                        + "Fix the logged issues or remove flag --fail-on-severity (-fos)."));

        }
    }

    private MavenExecutionResult addExceptionToResult(MavenExecutionResult result, Throwable e) {
        if (!result.getExceptions().contains(e)) {
            result.addException(e);
        }

        return result;
    }

    private void validatePrerequisitesForNonMavenPluginProjects(List<MavenProject> projects) {
        for (MavenProject mavenProject : projects) {