ClassPathResolverAdapter.java

package fr.sii.ogham.template.freemarker.adapter;

import java.net.URL;

import fr.sii.ogham.core.resource.resolver.ClassPathResolver;

import fr.sii.ogham.core.resource.resolver.DelegateResourceResolver;

import fr.sii.ogham.core.resource.resolver.ResourceResolver;

import freemarker.cache.ClassTemplateLoader;

import freemarker.cache.TemplateLoader;

/**

 * Adapter that converts general {@link ClassPathResolver} into FreeMarker

 * specific {@link ClassTemplateLoader}.

 * 

 * @author Cyril Dejonghe

 *

 */

public class ClassPathResolverAdapter extends AbstractFreeMarkerTemplateLoaderOptionsAdapter {

	public ClassPathResolverAdapter(ClassLoader classLoader) {

		super();

		this.classLoader = classLoader;

	@Override

	public boolean supports(ResourceResolver resolver) {

		ResourceResolver actualResolver = resolver instanceof DelegateResourceResolver ? ((DelegateResourceResolver) resolver).getActualResourceResolver() : resolver;

		return actualResolver instanceof ClassPathResolver;

	public TemplateLoader adapt(ResourceResolver resolver) {

		return new FixClassTemplateLoader(getClassLoader(), "");

	}

	private ClassLoader getClassLoader() {

		if(classLoader!=null) {

			return classLoader;

		}

		return Thread.currentThread().getContextClassLoader();

	}

	private static class FixClassTemplateLoader extends ClassTemplateLoader {

		public FixClassTemplateLoader(ClassLoader classLoader, String basePackagePath) {

			super(classLoader, basePackagePath);

		}

		@Override

		protected URL getURL(String name) {

			String path = name.startsWith("/") ? name.substring(1) : name;

			return super.getURL(path);

		}

	}

}

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