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/*
* 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.HashMap;
import java.util.List;
import java.util.Map;
import javax.websocket.Extension;
import org.apache.tomcat.util.res.StringManager;
public class TransformationFactory {
private static final StringManager sm = StringManager.getManager(TransformationFactory.class);
private static final TransformationFactory factory = new TransformationFactory();
private Map<String,TransformationBuilder> builders = new HashMap<>();
private TransformationFactory() {
// Hide default constructor
// Configure the built-in transformations
builders.put(PerMessageDeflate.NAME, PerMessageDeflate.BUILDER);
}
public static TransformationFactory getInstance() {
return factory;
}
public Transformation create(String name, List<List<Extension.Parameter>> preferences, boolean isServer) {
TransformationBuilder builder = builders.get(name);
if (builder != null) {
return builder.build(preferences, isServer);
}
if (Constants.ALLOW_UNSUPPORTED_EXTENSIONS) {
return null;
} else {
throw new IllegalArgumentException(sm.getString("transformerFactory.unsupportedExtension", name));
}
}
public void registerExtension(String name, TransformationBuilder builder) {
builders.put(name, builder);
}
}
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