private String getInterpolatedSiteDescriptorContent()

in doxia-integration-tools/src/main/java/org/apache/maven/doxia/tools/DefaultSiteTool.java [435:478]
37 lines of code
5 McCabe index (conditional complexity)

    private String getInterpolatedSiteDescriptorContent(
            MavenProject aProject, String siteDescriptorContent, boolean isEarly) throws SiteToolException {
        Objects.requireNonNull(aProject, "aProject cannot be null");
        Objects.requireNonNull(siteDescriptorContent, "siteDescriptorContent cannot be null");

        RegexBasedInterpolator interpolator = new RegexBasedInterpolator();

        if (isEarly) {
            interpolator.addValueSource(new PrefixedObjectValueSource("this.", aProject));
            interpolator.addValueSource(new PrefixedPropertiesValueSource("this.", aProject.getProperties()));
        } else {
            interpolator.addValueSource(new PrefixedObjectValueSource("project.", aProject));
            interpolator.addValueSource(new MapBasedValueSource(aProject.getProperties()));

            try {
                interpolator.addValueSource(new EnvarBasedValueSource());
            } catch (IOException e) {
                // Prefer logging?
                throw new SiteToolException("Cannot interpolate environment properties", e);
            }
        }

        interpolator.addPostProcessor(new InterpolationPostProcessor() {
            @Override
            public Object execute(String expression, Object value) {
                if (value != null) {
                    // we're going to parse this back in as XML so we need to escape XML markup
                    return value.toString()
                            .replace("&", "&amp;")
                            .replace("<", "&lt;")
                            .replace(">", "&gt;")
                            .replace("\"", "&quot;")
                            .replace("'", "&apos;");
                }
                return null;
            }
        });

        try {
            return interpolator.interpolate(siteDescriptorContent);
        } catch (InterpolationException e) {
            throw new SiteToolException("Cannot interpolate site descriptor", e);
        }
    }