}
    } // -- InputSource clone()

    /**
     * Get the path/URL of the POM or {@code null} if unknown.
     *
     * @return String
     */
    public String getLocation() {
        return this.location;
    } // -- String getLocation()

    /**
     * Get the identifier of the POM in the format {@code
     * <groupId>:<artifactId>:<version>}.
     *
     * @return String
     */

            InputLocation propertiesLocation = model.getLocation("properties");
            assertNotNull(propertiesLocation);
            assertEquals(13, propertiesLocation.getLineNumber());
            assertEquals(5, propertiesLocation.getColumnNumber());
            InputLocation filterPropLocation = propertiesLocation.getLocation("my.filter.value");
            assertNotNull(filterPropLocation);

        } catch (XMLStreamException e) {
            throw new ToolchainsParseException(
                    e.getMessage(),
                    e.getLocation().getLineNumber(),
                    e.getLocation().getColumnNumber(),
                    e);
        }
    }

    @Override
    public PersistedToolchains read(Reader input, Map<String, ?> options) throws IOException {

        String modelId = null;

        if (req.getLocation() != null) {
            line = req.getLocation().getLineNumber();
            column = req.getLocation().getColumnNumber();
            if (req.getLocation().getSource() != null) {
                modelId = req.getLocation().getSource().getModelId();
                source = req.getLocation().getSource().getLocation();
            }
        }

        } catch (XMLStreamException e) {
            throw new SettingsParseException(
                    e.getMessage(),
                    e.getLocation().getLineNumber(),
                    e.getLocation().getColumnNumber(),
                    e);
        }
    }

    @Override
    public Settings read(Reader input, Map<String, ?> options) throws IOException {

        }

        LOGGER.debug(
                "Reading installation settings from '{}'",
                getLocation(settingsRequest.getGlobalSettingsSource(), settingsRequest.getGlobalSettingsFile()));
        LOGGER.debug(
                "Reading project settings from '{}'",
                getLocation(settingsRequest.getProjectSettingsSource(), settingsRequest.getProjectSettingsFile()));
        LOGGER.debug(

        problems.add(new ModelProblemCollectorRequest(Severity.ERROR, ModelProblem.Version.BASE)
                .setMessage("Failed to interpolate file location " + path + ": " + e.getMessage())
                .setLocation(Optional.ofNullable(target.getLocation(locationKey))
                        .map(InputLocation::new)
                        .orElse(null))
                .setException(e));
    }

        assertEquals("", problem.getLocation());

        problem = new DefaultProblem(null, null, "SOURCE", -1, -1, null);
        assertEquals("SOURCE", problem.getLocation());

        problem = new DefaultProblem(null, null, null, 42, -1, null);
        assertEquals("line 42", problem.getLocation());

        problem = new DefaultProblem(null, null, null, -1, 127, null);

        } catch (XMLStreamException e) {
            throw new MetadataParseException(
                    e.getMessage(),
                    e.getLocation().getLineNumber(),
                    e.getLocation().getColumnNumber(),
                    e);
        }
    }

    public Metadata read(InputStream input, Map<String, ?> options) throws IOException {

        @Override
        public InputStream getInputStream() throws IOException {
            return source.openStream();
        }

        @Override
        public String getLocation() {
            return source.getLocation();
        }

        @Override
        public ModelSource2 getRelatedSource(String relPath) {
            Source rel = source.resolve(relPath);