Activation syspropActivation = new Activation();

        ActivationProperty syspropProperty = new ActivationProperty();
        syspropProperty.setName("java.version");

        syspropActivation.setProperty(syspropProperty);

        syspropActivated.setActivation(syspropActivation);

        Profile defaultActivated = new Profile();
        defaultActivated.setId("defaultActivated");

                    String key = "env."
                            + (caseSensitive ? entry.getKey() : entry.getKey().toUpperCase(Locale.ENGLISH));
                    tmp.setProperty(key, entry.getValue());
                }
                envVars = tmp;
            }

            props.putAll(envVars);
        }
    }

    @Test
    void resumeFromPropertyGetsApplied() {
        MavenExecutionRequest request = new DefaultMavenExecutionRequest();
        Properties properties = new Properties();
        properties.setProperty("remainingProjects", ":module-a");

        repository.applyResumptionProperties(request, properties);

        assertThat(request.getProjectActivation().getOptionalActiveProjectSelectors(), is(singleton(":module-a")));

        assertEquals(System.getProperty("user.dir"), value);
    }

    @Test
    void testValueExtractionFromSystemPropertiesWithMissingProject() throws Exception {
        String sysprop = "PPEET_sysprop1";

        Properties executionProperties = new Properties();

        if (executionProperties.getProperty(sysprop) == null) {
            executionProperties.setProperty(sysprop, "value");
        }

        String sysprop = "PPEET_sysprop1";

        Properties executionProperties = new Properties();

        if (executionProperties.getProperty(sysprop) == null) {
            executionProperties.setProperty(sysprop, "value");
        }

        ExpressionEvaluator ee = createExpressionEvaluator(null, executionProperties);

        Object value = ee.evaluate("${" + sysprop + "}");

            org.apache.maven.profiles.ActivationProperty profileProp = profileActivation.getProperty();

            if (profileProp != null) {
                ActivationProperty prop = new ActivationProperty();

                prop.setName(profileProp.getName());
                prop.setValue(profileProp.getValue());

                activation.setProperty(prop);
            }

            ActivationOS profileOs = profileActivation.getOs();

        Properties properties = new Properties();

        String value = String.join(PROPERTY_DELIMITER, buildResumptionData.getRemainingProjects());
        properties.setProperty(REMAINING_PROJECTS, value);

        return properties;
    }

    @Override
    public void applyResumptionData(MavenExecutionRequest request, MavenProject rootProject) {
        Properties properties =

    }

    @Override
    public void setProperty(Project project, String key, String value) {
        Properties properties = getMavenProject(project).getProperties();
        if (value == null) {
            properties.remove(key);
        } else {
            properties.setProperty(key, value);
        }
    }

    @Override

                    props.load(Channels.newInputStream(channel));
                }

                props.setProperty(key, Long.toString(System.currentTimeMillis()));

                if (error != null) {
                    props.setProperty(key + ERROR_KEY_SUFFIX, error);
                } else {
                    props.remove(key + ERROR_KEY_SUFFIX);
                }

int); protected void ensureEntityCapacity(); protected void reset(); public void MXParser(); public void setFeature(String, boolean) throws XmlPullParserExcepti; public boolean getFeature(String); public void setProperty(String, Object) throws XmlPullParserExcepti; public Object getProperty(String); public void setInput(java.io.Reader) throws XmlPullParserExcepti; public void setInput(java.io.InputStream, String) throws XmlPullParserExcepti; public String getInputEncoding(); public void defineEn...