org.codehaus.groovy.runtime.m12n.StandardPropertiesModuleFactory Maven / Gradle / Ivy

/*
 * Copyright 2003-2009 the original author or authors.
 *
 * 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 org.codehaus.groovy.runtime.m12n;

import groovy.lang.GroovyRuntimeException;

import java.util.Properties;

/**
 * This is the standard Groovy module factory. This factory will build a module
 * using the {@link MetaInfExtensionModule} by default, unless a key named
 * "factory" is found in the properties file. If this is the case, then a new
 * factory is instantiated and used instead of this factory.
 */
public class StandardPropertiesModuleFactory extends PropertiesModuleFactory {
    public static final String MODULE_FACTORY_KEY = "moduleFactory";

    @Override
    @SuppressWarnings("unchecked")
    public ExtensionModule newModule(final Properties properties, final ClassLoader classLoader) {
        String factoryName = properties.getProperty(MODULE_FACTORY_KEY);
        if (factoryName!=null) {
            try {
                Class factoryClass = (Class) classLoader.loadClass(factoryName);
                PropertiesModuleFactory delegate = factoryClass.newInstance();
                return delegate.newModule(properties, classLoader);
            } catch (ClassNotFoundException e) {
                throw new GroovyRuntimeException("Unable to load module factory ["+factoryName+"]",e);
            } catch (InstantiationException e) {
                throw new GroovyRuntimeException("Unable to instantiate module factory ["+factoryName+"]",e);
            } catch (IllegalAccessException e) {
                throw new GroovyRuntimeException("Unable to instantiate module factory ["+factoryName+"]",e);
            }
        }
        return MetaInfExtensionModule.newModule(properties, classLoader);
    }

}