/*
* The MIT License (MIT)
*
* Copyright (c) 2013 Brien L. Wheeler (brienwheeler@yahoo.com)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.brienwheeler.svc.email.impl;
import java.io.File;
import java.io.IOException;
import java.io.Reader;
import org.springframework.core.io.ClassPathResource;
import com.brienwheeler.lib.util.ValidationUtils;
import com.brienwheeler.svc.email.EmailServiceConfigException;
import freemarker.cache.FileTemplateLoader;
import freemarker.cache.TemplateLoader;
public class SmartTemplateLoader implements TemplateLoader
{
private static final String CLASSPATH_PREFIX = "classpath:";
private FileTemplateLoader fileLoader;
public SmartTemplateLoader(File baseDirectory)
{
ValidationUtils.assertNotNull(baseDirectory, "baseDirectory cannot be null");
try {
fileLoader = new FileTemplateLoader(baseDirectory);
}
catch (IOException e) {
throw new EmailServiceConfigException(e);
}
}
@Override
public Object findTemplateSource(String name) throws IOException
{
ValidationUtils.assertNotNull(name, "name cannot be null");
if (!name.startsWith(CLASSPATH_PREFIX))
return fileLoader.findTemplateSource(name);
ClassPathResource resource = new ClassPathResource(name.substring(CLASSPATH_PREFIX.length()));
if (resource.exists())
return new ClassPathTemplateSource(resource);
else
return null;
}
@Override
public Reader getReader(Object templateSource, String encoding) throws IOException
{
ValidationUtils.assertNotNull(templateSource, "templateSource cannot be null");
if (templateSource instanceof File)
return fileLoader.getReader(templateSource, encoding);
if (templateSource instanceof ClassPathTemplateSource)
return ((ClassPathTemplateSource) templateSource).getReader(encoding);
throw new EmailServiceConfigException("unexpected templateSource class " + templateSource.getClass().getName());
}
@Override
public long getLastModified(Object templateSource)
{
ValidationUtils.assertNotNull(templateSource, "templateSource cannot be null");
if (templateSource instanceof File)
return fileLoader.getLastModified(templateSource);
if (templateSource instanceof ClassPathTemplateSource)
return ((ClassPathTemplateSource) templateSource).getLastModified();
throw new EmailServiceConfigException("unexpected templateSource class " + templateSource.getClass().getName());
}
@Override
public void closeTemplateSource(Object templateSource) throws IOException
{
ValidationUtils.assertNotNull(templateSource, "templateSource cannot be null");
if (templateSource instanceof File) {
fileLoader.closeTemplateSource(templateSource);
return;
}
if (templateSource instanceof ClassPathTemplateSource) {
((ClassPathTemplateSource) templateSource).close();
return;
}
throw new EmailServiceConfigException("unexpected templateSource class " + templateSource.getClass().getName());
}
}