| /* |
| * 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.ignite.internal; |
| |
| import java.util.BitSet; |
| import java.util.Collection; |
| import java.util.EnumSet; |
| |
| /** |
| * The base feature class. |
| */ |
| public interface ThinProtocolFeature { |
| /** |
| * @return Feature ID. |
| */ |
| public int featureId(); |
| |
| /** |
| * @return Feature name. |
| */ |
| public String name(); |
| |
| /** |
| * @param features Feature set. |
| * @return Byte array representing all supported features. |
| */ |
| public static <E extends Enum<E> & ThinProtocolFeature> byte[] featuresAsBytes(Collection<E> features) { |
| final BitSet set = new BitSet(); |
| |
| for (ThinProtocolFeature f : features) |
| set.set(f.featureId()); |
| |
| return set.toByteArray(); |
| } |
| |
| /** |
| * Create EnumSet of supported features encoded by the bytes array. |
| * |
| * @param in Byte array representing all supported features. |
| * @param enumCls Type of the enum encoded by the bits at the byte array. |
| */ |
| public static <E extends Enum<E> & ThinProtocolFeature> EnumSet<E> enumSet(byte[] in, Class<E> enumCls) { |
| EnumSet<E> set = EnumSet.noneOf(enumCls); |
| |
| if (in == null) |
| return set; |
| |
| final BitSet bSet = BitSet.valueOf(in); |
| |
| for (E e : enumCls.getEnumConstants()) { |
| if (bSet.get(e.featureId())) |
| set.add(e); |
| } |
| |
| return set; |
| } |
| } |