tech.tablesaw.plotly.components.TemplateUtils Maven / Gradle / Ivy

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package tech.tablesaw.plotly.components;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

import com.mitchellbosecke.pebble.PebbleEngine;
import com.mitchellbosecke.pebble.error.PebbleException;
import com.mitchellbosecke.pebble.loader.ClasspathLoader;
import com.mitchellbosecke.pebble.loader.DelegatingLoader;
import com.mitchellbosecke.pebble.loader.FileLoader;
import com.mitchellbosecke.pebble.loader.Loader;

public class TemplateUtils {

    private static Collection templateLocations = new ArrayList<>(); 
    
    public static void setTemplateLocations(String... locations) {
        templateLocations = Arrays.asList(locations);
    }
    
    public static PebbleEngine getNewEngine() {
        PebbleEngine engine;
        try {
            Loader loader = new ClasspathLoader();
            if (templateLocations != null && templateLocations.size() > 0) {
                List> loaders = new ArrayList<>();
                for (String templateLocation : templateLocations) {
                    FileLoader fileLoader = new FileLoader();
                    fileLoader.setPrefix(templateLocation);
                    loaders.add(fileLoader);
                }
                // add this one last, so it is shadowed
                loaders.add(loader);
                loader = new DelegatingLoader(loaders);
            }
            engine = new PebbleEngine.Builder().loader(loader).strictVariables(false).build();
        } catch (PebbleException e) {
            e.printStackTrace();
            throw new IllegalStateException(e);
        }
        return engine;
    }
}