org.apache.tomcat.websocket.TransformationFactory Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.tomcat.websocket;
import java.util.List;
import javax.websocket.Extension;
import org.apache.tomcat.util.res.StringManager;
public class TransformationFactory {
private static final StringManager sm = StringManager.getManager(Constants.PACKAGE_NAME);
private static final TransformationFactory factory = new TransformationFactory();
private TransformationFactory() {
// Hide default constructor
}
public static TransformationFactory getInstance() {
return factory;
}
public Transformation create(String name, List> preferences,
boolean isServer) {
if (PerMessageDeflate.NAME.equals(name)) {
return PerMessageDeflate.negotiate(preferences, isServer);
}
if (Constants.ALLOW_UNSUPPORTED_EXTENSIONS) {
return null;
} else {
throw new IllegalArgumentException(
sm.getString("transformerFactory.unsupportedExtension", name));
}
}
}