atom.app.FreeMarkerTemplateManager Maven / Gradle / Ivy
/*
* Copyright © 2014 Geeoz, and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Research Projects is dual-licensed under the GNU General Public
* License, version 2.0 (GPLv2) and the Geeoz Commercial License.
*
* Solely for non-commercial purposes. A purpose is non-commercial only if
* it is in no manner primarily intended for or directed toward commercial
* advantage or private monetary compensation.
*
* This Geeoz Software is supplied to you by Geeoz in consideration of your
* agreement to the following terms, and your use, installation, modification
* or redistribution of this Geeoz Software constitutes acceptance of these
* terms. If you do not agree with these terms, please do not use, install,
* modify or redistribute this Geeoz Software.
*
* Neither the name, trademarks, service marks or logos of Geeoz may be used
* to endorse or promote products derived from the Geeoz Software without
* specific prior written permission from Geeoz.
*
* The Geeoz Software is provided by Geeoz on an "AS IS" basis. GEEOZ MAKES NO
* WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
* WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, REGARDING THE GEEOZ SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
* COMBINATION WITH YOUR PRODUCTS.
*
* IN NO EVENT SHALL GEEOZ BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION
* AND/OR DISTRIBUTION OF THE GEEOZ SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER
* THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR
* OTHERWISE, EVEN IF GEEOZ HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* A copy of the GNU General Public License is included in the distribution in
* the file LICENSE and at
*
* http://www.gnu.org/licenses/gpl-2.0.html
*
* If you are using the Research Projects for commercial purposes, we
* encourage you to visit
*
* http://products.geeoz.com/license
*
* for more details.
*
* This software or hardware and documentation may provide access to
* or information on content, products, and services from third parties.
* Geeoz and its affiliates are not responsible for and expressly disclaim
* all warranties of any kind with respect to third-party content, products,
* and services. Geeoz and its affiliates will not be responsible for any loss,
* costs, or damages incurred due to your access to or use of third-party
* content, products, or services. If a third-party content exists, the
* additional copyright notices and license terms applicable to portions of the
* software are set forth in the THIRD_PARTY_LICENSE_README file.
*
* Please contact Geeoz or visit www.geeoz.com if you need additional
* information or have any questions.
*/
package atom.app;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;
import freemarker.template.TemplateExceptionHandler;
import freemarker.template.Version;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.nio.charset.StandardCharsets;
import java.util.Locale;
/**
* Class to generate text from FreeMarker templates.
*
* You do not instantiate this class directly; instead, retrieve it through
* {@link atom.content.Context#getSystemService}.
*
* @author Alex Voloshyn
* @version 1.3 3/4/14
*/
public final class FreeMarkerTemplateManager implements TemplateManager {
/**
* ClassLoader root path.
*/
private static final String ROOT_PATH = "/";
/**
* The non-backward-compatible bugfixes/improvements should be enabled.
*/
private static final Version LAST_VERSION = new Version(2, 3, 20);
@Override
public String process(final String path,
final Locale locale,
final Object data) {
try {
final Configuration cfg = new Configuration();
cfg.setClassForTemplateLoading(this.getClass(), ROOT_PATH);
cfg.setIncompatibleImprovements(LAST_VERSION);
cfg.setDefaultEncoding(StandardCharsets.UTF_8.displayName());
if (locale != null) {
cfg.setLocale(locale);
}
cfg.setTemplateExceptionHandler(
TemplateExceptionHandler.RETHROW_HANDLER);
final Template template = cfg.getTemplate(path);
final Writer writer = new StringWriter();
template.process(data, writer);
return writer.toString();
} catch (TemplateException | IOException e) {
e.printStackTrace();
return null;
}
}
}