if (inputStream != null) {
                return xml.read(inputStream, request.isStrict(), source);
            } else if (reader != null) {
                return xml.read(reader, request.isStrict(), source);
            } else if (path != null) {
                try (InputStream is = Files.newInputStream(path)) {
                    return xml.read(is, request.isStrict(), source);
                }
            } else {

            if (reader != null) {
                return xml.read(reader, request.isStrict());
            } else {
                return xml.read(inputStream, request.isStrict());
            }
        } catch (Exception e) {
            throw new XmlReaderException("Unable to read toolchains: " + getMessage(e), getLocation(e), e);
        }
    }

    @Override

            if (inputStream != null) {
                return xml.read(inputStream, request.isStrict());
            } else if (reader != null) {
                return xml.read(reader, request.isStrict());
            } else if (path != null) {
                try (InputStream is = Files.newInputStream(path)) {
                    return xml.read(is, request.isStrict());
                }
            } else {

                    return PersistedToolchains.newInstance();
                }
                toolchains = request.getSession()
                        .getService(ToolchainsXmlFactory.class)
                        .read(XmlReaderRequest.builder()
                                .inputStream(is)
                                .location(toolchainsSource.getLocation())
                                .strict(true)

        final byte[] buffer = new byte[1024 * 32];
        for (; ; ) {
            int read = stream.read(buffer);
            if (read < 0) {
                break;
            }
            for (ChecksumCalculator checksumCalculator : algMap.values()) {
                checksumCalculator.update(ByteBuffer.wrap(buffer, 0, read));
            }
        }

            if (reader != null) {
                return xml.read(reader, request.isStrict(), source);
            } else {
                return xml.read(inputStream, request.isStrict(), source);
            }
        } catch (Exception e) {
            throw new XmlReaderException("Unable to read settings: " + getMessage(e), getLocation(e), e);
        }
    }

    @Override

     *
     * @param model The model into which to merge the values defined by the profile, must not be <code>null</code>.
     * @param profile The (read-only) profile whose values should be injected, may be <code>null</code>.
     * @param request The model building request that holds further settings, must not be {@code null}.

        // phase 1
        DefaultModelBuilderResult result = new DefaultModelBuilderResult();

        DefaultModelProblemCollector problems = new DefaultModelProblemCollector(result);

        // read and validate raw model
        Model fileModel = readFileModel(request, problems);
        result.setFileModel(fileModel);

        Model activatedFileModel = activateFileModel(fileModel, request, result, problems);

        try {
            try (InputStream is = settingsSource.openStream()) {
                settings = request.getSession()
                        .getService(SettingsXmlFactory.class)
                        .read(XmlReaderRequest.builder()
                                .inputStream(is)
                                .location(settingsSource.getLocation())
                                .strict(true)

            String modelId = "org.apache.maven:maven-model-builder:" + version + "-"
                    + this.getClass().getPackage().getImplementationVersion() + ":super-pom";
            return modelProcessor.read(XmlReaderRequest.builder()
                    .modelId(modelId)
                    .location(url.toExternalForm())
                    .inputStream(is)
                    .strict(false)
                    .build());