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package org.glassfish.jersey.server.mvc.mustache;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.nio.charset.Charset;
import javax.ws.rs.core.Configuration;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.inject.Inject;
import javax.inject.Singleton;
import javax.servlet.ServletContext;
import org.glassfish.jersey.internal.util.collection.Value;
import org.glassfish.jersey.server.mvc.Viewable;
import org.glassfish.jersey.server.mvc.spi.AbstractTemplateProcessor;
import org.glassfish.jersey.server.mvc.spi.TemplateProcessor;
import org.glassfish.hk2.api.ServiceLocator;
import org.jvnet.hk2.annotations.Optional;
import com.github.mustachejava.DefaultMustacheFactory;
import com.github.mustachejava.Mustache;
import com.github.mustachejava.MustacheFactory;
/**
* {@link TemplateProcessor Template processor} providing support for Mustache templates.
*
* @author Michal Gajdos (michal.gajdos at oracle.com)
* @see MustacheMvcFeature
* @since 2.3
*/
@Singleton
final class MustacheTemplateProcessor extends AbstractTemplateProcessor<Mustache> {
private final MustacheFactory factory;
/**
* Create an instance of this processor with injected {@link Configuration config} and
* (optional) {@link ServletContext servlet context}.
*
* @param config configuration to configure this processor from.
* @param serviceLocator service locator to initialize template object factory if needed.
* @param servletContext (optional) servlet context to obtain template resources from.
*/
@Inject
public MustacheTemplateProcessor(final Configuration config, final ServiceLocator serviceLocator,
@Optional final ServletContext servletContext) {
super(config, servletContext, "mustache", "mustache");
this.factory = getTemplateObjectFactory(serviceLocator, MustacheFactory.class, new Value<MustacheFactory>() {
@Override
public MustacheFactory get() {
return new DefaultMustacheFactory();
}
});
}
@Override
protected Mustache resolve(final String templatePath, final Reader reader) {
return factory.compile(reader, templatePath);
}
@Override
public void writeTo(final Mustache mustache, final Viewable viewable, final MediaType mediaType,
final MultivaluedMap<String, Object> httpHeaders, final OutputStream out) throws IOException {
Charset encoding = setContentType(mediaType, httpHeaders);
mustache.execute(new OutputStreamWriter(out, encoding), viewable.getModel()).flush();
}
}