transient Object datum;

    public String getGroupId() {
        return groupId;
    }

    public void setGroupId(String groupId) {
        this.groupId = groupId;
    }

    public String getArtifactId() {
        return artifactId;
    }

    public void setArtifactId(String artifactId) {
        this.artifactId = artifactId;
    }

    public String getVersion() {
        return version;
    }

                                ? parentData.getVersion()
                                : currentData.getRawModel().getVersion());

                currentData.setArtifactId(currentData.getRawModel().getArtifactId());
                parentIds.add(currentData.getId());
                // Reset - only needed for 'getId'.
                currentData.setGroupId(null);
                currentData.setArtifactId(null);

        if (!pomArtifact.getClassifier().isEmpty() || !"pom".equals(pomArtifact.getExtension())) {
            pomArtifact =
                    new DefaultArtifact(artifact.getGroupId(), artifact.getArtifactId(), "pom", artifact.getVersion());
        }

        return pomArtifact;
    }

    /**
     * Creates POM artifact out of passed in artifact by dropping classifier (if exists) and rewriting extension to

                                && (candidates.get(pluginGroup) == null
                                        || candidates.get(pluginGroup).contains(plugin.getArtifactId()))) {
                            return new DefaultPluginPrefixResult(pluginGroup, plugin.getArtifactId(), repository);
                        }
                    }
                }
            } catch (IOException e) {

                    && !hasMavenProjectInfoReportsPlugin
                    && "org.apache.maven.plugins".equals(plugin.getGroupId())
                    && "maven-project-info-reports-plugin".equals(plugin.getArtifactId())) {
                hasMavenProjectInfoReportsPlugin = true;
            }
        }

        if (!reporting.isExcludeDefaults() && !hasMavenProjectInfoReportsPlugin) {

    }

    public ArtifactNotFoundException(String message, Artifact artifact) {
        this(
                message,
                artifact.getGroupId(),
                artifact.getArtifactId(),
                artifact.getVersion(),
                artifact.getType(),
                artifact.getClassifier(),
                null,
                artifact.getDownloadUrl(),

                    + execution.getArtifactId()
                    + ':'
                    + execution.getVersion()
                    + ':'
                    + execution.getGoal());
            buffer.a(' ').strong('(' + execution.getExecutionId() + ')');
        }

        if (project != null) {
            buffer.a(" on project ");
            buffer.project(project.getArtifactId());
        }

    /**
     * {@return the group identifier of the artifact}.
     */
    @Nonnull
    String getGroupId();

    /**
     * {@return the identifier of the artifact}.
     */
    @Nonnull
    String getArtifactId();

    /**
     * Returns the classifier of the artifact.
     *
     * @return the classifier or an empty string if none, never {@code null}
     */
    @Nonnull
    String getClassifier();

    /**

         */
        org.apache.maven.artifact.Artifact result = new org.apache.maven.artifact.DefaultArtifact(
                artifact.getGroupId(),
                artifact.getArtifactId(),
                artifact.getVersion(),
                null,
                artifact.getProperty(ArtifactProperties.TYPE, artifact.getExtension()),
                nullify(artifact.getClassifier()),

        assertNotNull(pluginDescriptor);
        assertEquals("org.apache.maven.its.plugins", pluginDescriptor.getGroupId());
        assertEquals("maven-it-plugin", pluginDescriptor.getArtifactId());
        assertEquals("0.1", pluginDescriptor.getVersion());
    }

    // test a build where projects use different versions of the same plugin

    @Test