Examples with SightlyScriptEngine org.apache.sling.scripting.sightly.impl.engine.SightlyScriptEngine used on opensource projects

Example 1 with SightlyScriptEngine

use of org.apache.sling.scripting.sightly.impl.engine.SightlyScriptEngine in project sling by apache.

the class RenderUnitProvider method provide.

@Override
public ProviderOutcome provide(String identifier, RenderContext renderContext, Bindings arguments) {
    if (identifier.endsWith("." + SightlyScriptEngineFactory.EXTENSION)) {
        Bindings globalBindings = renderContext.getBindings();
        SlingScriptHelper sling = BindingsUtils.getHelper(globalBindings);
        SlingHttpServletRequest request = BindingsUtils.getRequest(globalBindings);
        final Resource renderUnitResource = ScriptUtils.resolveScript(scriptingResourceResolverProvider.getRequestScopedResourceResolver(), renderContext, identifier);
        if (renderUnitResource == null) {
            Resource caller = ResourceResolution.getResourceForRequest(request.getResourceResolver(), request);
            if (caller != null) {
                String resourceSuperType = caller.getResourceSuperType();
                StringBuilder errorMessage = new StringBuilder("Cannot find resource ");
                errorMessage.append(identifier).append(" for base path ").append(caller.getPath());
                if (StringUtils.isNotEmpty(resourceSuperType)) {
                    errorMessage.append(" with resource super type ").append(resourceSuperType);
                }
                errorMessage.append(".");
                return ProviderOutcome.failure(new SightlyException(errorMessage.toString()));
            } else {
                return ProviderOutcome.failure(new SightlyException("Cannot resolve template " + identifier + " for script " + sling.getScript().getScriptResource().getPath()));
            }
        }
        RenderUnit renderUnit;
        try {
            CachedScript cachedScript = scriptCache.getScript(renderUnitResource.getPath());
            final SightlyCompiledScript compiledScript;
            if (cachedScript != null) {
                compiledScript = (SightlyCompiledScript) cachedScript.getCompiledScript();
            } else {
                SightlyScriptEngine sightlyScriptEngine = (SightlyScriptEngine) scriptEngineManager.getEngineByName(SightlyScriptEngineFactory.SHORT_NAME);
                String encoding = renderUnitResource.getResourceMetadata().getCharacterEncoding();
                if (StringUtils.isEmpty(encoding)) {
                    encoding = "UTF-8";
                }
                InputStream inputStream = renderUnitResource.adaptTo(InputStream.class);
                if (inputStream == null) {
                    return ProviderOutcome.failure();
                }
                InputStreamReader inputStreamReader = new InputStreamReader(inputStream, encoding);
                ScriptNameAwareReader reader = new ScriptNameAwareReader(inputStreamReader, renderUnitResource.getPath());
                compiledScript = (SightlyCompiledScript) sightlyScriptEngine.compile(reader);
                scriptCache.putScript(new CachedScript() {

                    @Override
                    public String getScriptPath() {
                        return renderUnitResource.getPath();
                    }

                    @Override
                    public CompiledScript getCompiledScript() {
                        return compiledScript;
                    }
                });
            }
            renderUnit = compiledScript.getRenderUnit();
            return ProviderOutcome.success(renderUnit);
        } catch (Exception e) {
            return ProviderOutcome.failure(e);
        }
    }
    return ProviderOutcome.failure();
}