implement template api for mustache

This commit is contained in:
Sebastian Sdorra
2012-08-12 20:50:19 +02:00
parent afe94f36bb
commit aaf089a22f
4 changed files with 386 additions and 0 deletions

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/**
* Copyright (c) 2010, Sebastian Sdorra All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer. 2. Redistributions in
* binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution. 3. Neither the name of SCM-Manager;
* nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.template;
//~--- non-JDK imports --------------------------------------------------------
import com.github.mustachejava.Mustache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
//~--- JDK imports ------------------------------------------------------------
import java.io.Writer;
import java.util.Map;
/**
*
* @author Sebastian Sdorra
*/
public class MustacheTemplate implements Template
{
/**
* the logger for MustacheTemplae
*/
private static final Logger logger =
LoggerFactory.getLogger(MustacheTemplate.class);
//~--- constructors ---------------------------------------------------------
/**
* Constructs ...
*
*
*
* @param templatePath
* @param mustache
*/
public MustacheTemplate(String templatePath, Mustache mustache)
{
this.templatePath = templatePath;
this.mustache = mustache;
}
//~--- methods --------------------------------------------------------------
/**
* Method description
*
*
* @param writer
* @param environment
*/
@Override
public void execute(Writer writer, Map<String, ? extends Object> environment)
{
if (logger.isDebugEnabled())
{
logger.debug("render mustache template at {}", templatePath);
}
mustache.execute(writer, environment);
}
//~--- fields ---------------------------------------------------------------
/** Field description */
private Mustache mustache;
/** Field description */
private String templatePath;
}

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/**
* Copyright (c) 2010, Sebastian Sdorra All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer. 2. Redistributions in
* binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution. 3. Neither the name of SCM-Manager;
* nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.template;
//~--- non-JDK imports --------------------------------------------------------
import com.github.mustachejava.Mustache;
import com.github.mustachejava.MustacheFactory;
import com.google.inject.Inject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
//~--- JDK imports ------------------------------------------------------------
import java.io.IOException;
import javax.servlet.ServletContext;
/**
*
* @author Sebastian Sdorra
*/
@DefaultEngine
public class MustacheTemplateEngine implements TemplateEngine
{
/** Field description */
public static final TemplateType TYPE = new TemplateType("mustache",
"Mustache", "mustache");
/**
* the logger for MustacheTemplateEngine
*/
private static final Logger logger =
LoggerFactory.getLogger(MustacheTemplateEngine.class);
//~--- constructors ---------------------------------------------------------
/**
* Constructs ...
*
*
* @param context
*/
@Inject
public MustacheTemplateEngine(ServletContext context)
{
factory = new ServletMustacheFactory(context);
}
//~--- get methods ----------------------------------------------------------
/**
* Method description
*
*
* @param templatePath
*
* @return
*
* @throws IOException
*/
@Override
public Template getTemplate(String templatePath) throws IOException
{
if (logger.isTraceEnabled())
{
logger.trace("try to find mustache template at {}", templatePath);
}
Template template = null;
Mustache mustache = factory.compile(templatePath);
if (mustache != null)
{
if (logger.isTraceEnabled())
{
logger.trace("return mustache template for {}", templatePath);
}
template = new MustacheTemplate(templatePath, mustache);
}
else if (logger.isWarnEnabled())
{
logger.warn("could not find mustache template at {}", templatePath);
}
return template;
}
/**
* Method description
*
*
* @return
*/
@Override
public TemplateType getType()
{
return TYPE;
}
//~--- fields ---------------------------------------------------------------
/** Field description */
private MustacheFactory factory;
}

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/**
* Copyright (c) 2010, Sebastian Sdorra All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer. 2. Redistributions in
* binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution. 3. Neither the name of SCM-Manager;
* nor the names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* http://bitbucket.org/sdorra/scm-manager
*
*/
package sonia.scm.template;
//~--- non-JDK imports --------------------------------------------------------
import com.github.mustachejava.DefaultMustacheFactory;
import com.google.common.base.Charsets;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
//~--- JDK imports ------------------------------------------------------------
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import javax.servlet.ServletContext;
/**
*
* @author Sebastian Sdorra
*/
public class ServletMustacheFactory extends DefaultMustacheFactory
{
/**
* the logger for ServletMustacheFactory
*/
private static final Logger logger =
LoggerFactory.getLogger(ServletMustacheFactory.class);
//~--- constructors ---------------------------------------------------------
/**
* Constructs ...
*
*
* @param servletContext
*/
public ServletMustacheFactory(ServletContext servletContext)
{
this.servletContext = servletContext;
}
//~--- get methods ----------------------------------------------------------
/**
* Method description
*
*
* @param resourceName
*
* @return
*/
@Override
public Reader getReader(String resourceName)
{
if (logger.isTraceEnabled())
{
logger.trace("try to find resource for {}", resourceName);
}
Reader reader = null;
InputStream is = servletContext.getResourceAsStream(resourceName);
if (is == null)
{
if (logger.isTraceEnabled())
{
logger.trace("could not find resource {} in ServletContext",
resourceName);
}
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
if (classLoader == null)
{
classLoader = ServletMustacheFactory.class.getClassLoader();
}
is = classLoader.getResourceAsStream(resourceName);
}
if (is != null)
{
if (logger.isTraceEnabled())
{
logger.trace("found resoruce for {}, return reader", resourceName);
}
reader = new BufferedReader(new InputStreamReader(is, Charsets.UTF_8));
}
else if (logger.isWarnEnabled())
{
logger.warn("could not find resource {}", resourceName);
}
return reader;
}
//~--- fields ---------------------------------------------------------------
/** Field description */
private ServletContext servletContext;
}