/*
*
* DefaultProcessedTemplateProvider.java
*
*-----------------------------------------------------------------------------
* Copyright 2013 Dowd and Associates
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-----------------------------------------------------------------------------
*
*/
package com.dowdandassociates.gentoo.bootstrap;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.nio.file.Files;
import java.nio.file.Path;
import com.google.common.base.Optional;
import com.google.common.base.Supplier;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.name.Named;
import freemarker.template.Template;
import freemarker.template.TemplateException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DefaultProcessedTemplateProvider implements Provider<ProcessedTemplate>
{
private static Logger log = LoggerFactory.getLogger(DefaultProcessedTemplateProvider.class);
private Supplier<String> scriptName;
private Optional<Template> template;
private Object templateDataModel;
@Inject
DefaultProcessedTemplateProvider(
@Named("Script Name") Supplier<String> scriptName,
Optional<Template> template,
@Named("Template Data Model") Object templateDataModel)
{
this.scriptName = scriptName;
this.template = template;
this.templateDataModel = templateDataModel;
}
public ProcessedTemplate get()
{
boolean temporaryFile;
Optional<Path> path;
if (template.isPresent())
{
try
{
Path tempFile = Files.createTempFile(scriptName.get(), ".tmp");
Writer out = new FileWriter(tempFile.toFile());
template.get().process(templateDataModel, out);
out.close();
log.info("Processed template in " + tempFile.toString());
temporaryFile = true;
path = Optional.of(tempFile);
}
catch (IllegalArgumentException |
IOException |
SecurityException |
TemplateException |
UnsupportedOperationException e)
{
log.error(e.getMessage(), e);
temporaryFile = false;
path = Optional.absent();
}
}
else
{
log.info("No template");
temporaryFile = false;
path = Optional.absent();
}
return new ProcessedTemplate().
withTemporaryFile(temporaryFile).
withPath(path);
}
}