66 lines
2.2 KiB
Java
66 lines
2.2 KiB
Java
/**
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*
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* Copyright 2018 Florian Schmaus
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.compression;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.List;
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import org.jivesoftware.smack.compress.packet.Compress;
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public class XmppCompressionManager {
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private static final List<XmppCompressionFactory> xmppCompressionFactories = new ArrayList<>(4);
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public static XmppCompressionFactory registerXmppCompressionFactory(XmppCompressionFactory xmppCompressionFactory) {
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final String method = xmppCompressionFactory.getCompressionMethod();
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XmppCompressionFactory previousFactory = null;
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synchronized (xmppCompressionFactories) {
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for (Iterator<XmppCompressionFactory> it = xmppCompressionFactories.iterator(); it.hasNext(); ) {
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XmppCompressionFactory factory = it.next();
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if (factory.getCompressionMethod().equals(method)) {
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it.remove();
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previousFactory = factory;
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break;
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}
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}
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xmppCompressionFactories.add(xmppCompressionFactory);
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Collections.sort(xmppCompressionFactories);
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}
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return previousFactory;
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}
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public static XmppCompressionFactory getBestFactory(Compress.Feature compressFeature) {
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List<String> announcedMethods = compressFeature.getMethods();
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synchronized (xmppCompressionFactories) {
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for (XmppCompressionFactory factory : xmppCompressionFactories) {
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if (announcedMethods.contains(factory.getCompressionMethod())) {
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return factory;
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}
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}
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}
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return null;
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}
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}
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