DefaultTemplateLoader.java

/**
 *  Copyright 2011 Oliver Buchtala
 *
 *	This file is part of ndogen.
 *
 *  ndogen is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  ndogen is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with ndogen.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.ndogen.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
import java.net.URISyntaxException;
import java.net.URL;

import freemarker.cache.TemplateLoader;

public class DefaultTemplateLoader implements TemplateLoader {

	String templateDir;
	
	public DefaultTemplateLoader() {
		this("/");
	}

	public DefaultTemplateLoader(String templateDir) {
		super();
		this.templateDir = templateDir;
	}

	@Override
	public Object findTemplateSource(String name) throws IOException {
		
		ClassLoader classLoader = ClassLoader.getSystemClassLoader();
		URL resource = classLoader.getResource(templateDir+name);
		File file;
		try {
			file = new File(resource.toURI());
		} catch (URISyntaxException e) {
			throw new RuntimeException(e);
		}
		return file;
	}

	@Override
	public long getLastModified(Object templateSource) {
		if (templateSource instanceof File) {
			File file = (File) templateSource;
			return file.lastModified();
		} else {
			throw new RuntimeException("Provided resource is incompatible with this loader");
		}
	}

	@Override
	public Reader getReader(Object templateSource, String encoding)
			throws IOException {
		if (templateSource instanceof File) {
			// TODO: do not know how to change encoding!
			File file = (File) templateSource;
			FileReader fileReader = new FileReader(file);
			return new BufferedReader(fileReader);
		} else {
			throw new RuntimeException("Provided resource is incompatible with this loader");
		}
		
	}

	@Override
	public void closeTemplateSource(Object templateSource) throws IOException {
		// need to close the delivered Reader???
	}

	
}