com.sun.jersey.api.wadl.config.WadlGeneratorConfigLoader Maven / Gradle / Ivy
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package com.sun.jersey.api.wadl.config;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.core.reflection.ReflectionHelper;
import com.sun.jersey.server.wadl.WadlGenerator;
import java.security.AccessController;
import java.util.Collections;
import java.util.List;
/**
* Loads a {@link WadlGeneratorConfig} and provides access to the {@link WadlGenerator}
* provided by the loaded {@link WadlGeneratorConfig}.
* If no {@link WadlGeneratorConfig} is provided, the default {@link WadlGenerator}
* will be loaded.
*
* @author Martin Grotzke
* @version $Id$
*/
public class WadlGeneratorConfigLoader {
/**
* Load the {@link WadlGeneratorConfig} from the provided {@link ResourceConfig} using the
* property {@link ResourceConfig#PROPERTY_WADL_GENERATOR_CONFIG}.
*
*
* The type of this property must be a subclass or an instance of a subclass of
* {@link WadlGeneratorConfig}.
* If it's not set, the default {@link com.sun.jersey.server.wadl.generators.WadlGeneratorJAXBGrammarGenerator} will be used.
*
*
* @param resourceConfig
* @return a configure {@link WadlGeneratorConfig}.
*/
public static WadlGeneratorConfig loadWadlGeneratorsFromConfig( ResourceConfig resourceConfig ) {
final Object wadlGeneratorConfigProperty = resourceConfig.getProperty(
ResourceConfig.PROPERTY_WADL_GENERATOR_CONFIG );
if ( wadlGeneratorConfigProperty == null ) {
WadlGeneratorConfig config = new WadlGeneratorConfig() {
@Override
public List configure() {
return Collections.EMPTY_LIST;
}
};
return config;
}
else {
try {
if ( wadlGeneratorConfigProperty instanceof WadlGeneratorConfig ) {
return ( (WadlGeneratorConfig)wadlGeneratorConfigProperty );
}
final Class configClazz;
if ( wadlGeneratorConfigProperty instanceof Class ) {
configClazz = ( (Class)wadlGeneratorConfigProperty ).
asSubclass( WadlGeneratorConfig.class );
}
else if ( wadlGeneratorConfigProperty instanceof String ) {
configClazz = AccessController.doPrivileged(ReflectionHelper.classForNameWithExceptionPEA((String)wadlGeneratorConfigProperty)).
asSubclass( WadlGeneratorConfig.class );
}
else {
throw new RuntimeException( "The property " + ResourceConfig.PROPERTY_WADL_GENERATOR_CONFIG +
" is an invalid type: " + wadlGeneratorConfigProperty.getClass().getName() +
" (supported: String, Class," +
" WadlGeneratorConfiguration)" );
}
final WadlGeneratorConfig config = configClazz.newInstance();
return config;
} catch ( Exception e ) {
throw new RuntimeException( "Could not load WadlGeneratorConfiguration," +
" check the configuration of " + ResourceConfig.PROPERTY_WADL_GENERATOR_CONFIG, e );
}
}
}
}