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package org.glassfish.jersey.server.mvc.freemarker;
import javax.ws.rs.ConstrainedTo;
import javax.ws.rs.RuntimeType;
import javax.ws.rs.core.Configuration;
import javax.ws.rs.core.Feature;
import javax.ws.rs.core.FeatureContext;
import org.glassfish.jersey.server.mvc.MvcFeature;
/**
* {@link Feature} used to add support for {@link MvcFeature MVC} and Freemarker templates.
* <p/>
* Note: This feature also registers {@link MvcFeature}.
*
* @author Michal Gajdos
* @author Jeff Wilde (jeff.wilde at complicatedrobot.com)
*/
@ConstrainedTo(RuntimeType.SERVER)
public final class FreemarkerMvcFeature implements Feature {
private static final String SUFFIX = ".freemarker";
/**
* {@link String} property defining the base path to Freemarker templates. If set, the value of the property is added in front
* of the template name defined in:
* <ul>
* <li>{@link org.glassfish.jersey.server.mvc.Viewable Viewable}</li>
* <li>{@link org.glassfish.jersey.server.mvc.Template Template}, or</li>
* <li>{@link org.glassfish.jersey.server.mvc.ErrorTemplate ErrorTemplate}</li>
* </ul>
* <p/>
* Value can be absolute providing a full path to a system directory with templates or relative to current
* {@link javax.servlet.ServletContext servlet context}.
* <p/>
* There is no default value.
* <p/>
* The name of the configuration property is <tt>{@value}</tt>.
*/
public static final String TEMPLATE_BASE_PATH = MvcFeature.TEMPLATE_BASE_PATH + SUFFIX;
/**
* If {@code true} then enable caching of Freemarker templates to avoid multiple compilation.
* <p/>
* The default value is {@code false}.
* <p/>
* The name of the configuration property is <tt>{@value}</tt>.
*
* @since 2.5
*/
public static final String CACHE_TEMPLATES = MvcFeature.CACHE_TEMPLATES + SUFFIX;
/**
* Property used to pass user-configured {@link org.glassfish.jersey.server.mvc.freemarker.FreemarkerConfigurationFactory}.
* <p/>
* The default value is not set.
* <p/>
* The name of the configuration property is <tt>{@value}</tt>.
* <p/>
* This property will also accept an instance of {@link freemarker.template.Configuration Configuration} directly, to
* support backwards compatibility. If you want to set custom {@link freemarker.template.Configuration configuration} then set
* {@link freemarker.cache.TemplateLoader template loader} to multi loader of:
* {@link freemarker.cache.WebappTemplateLoader} (if applicable), {@link freemarker.cache.ClassTemplateLoader} and
* {@link freemarker.cache.FileTemplateLoader} keep functionality of resolving templates.
* <p/>
* If no value is set, a {@link org.glassfish.jersey.server.mvc.freemarker.FreemarkerDefaultConfigurationFactory factory}
* with the above behaviour is used by default in the
* {@link org.glassfish.jersey.server.mvc.freemarker.FreemarkerViewProcessor} class.
* <p/>
*
* @since 2.5
*/
public static final String TEMPLATE_OBJECT_FACTORY = MvcFeature.TEMPLATE_OBJECT_FACTORY + SUFFIX;
/**
* Property defines output encoding produced by {@link org.glassfish.jersey.server.mvc.spi.TemplateProcessor}.
* The value must be a valid encoding defined that can be passed
* to the {@link java.nio.charset.Charset#forName(String)} method.
*
* <p/>
* The default value is {@code UTF-8}.
* <p/>
* The name of the configuration property is <tt>{@value}</tt>.
* <p/>
*
* @since 2.7
*/
public static final String ENCODING = MvcFeature.ENCODING + SUFFIX;
@Override
public boolean configure(final FeatureContext context) {
final Configuration config = context.getConfiguration();
if (!config.isRegistered(FreemarkerViewProcessor.class)) {
// Template Processor.
context.register(FreemarkerViewProcessor.class);
// MvcFeature.
if (!config.isRegistered(MvcFeature.class)) {
context.register(MvcFeature.class);
}
return true;
}
return false;
}
}