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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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * .
 *
 */

package org.apache.hc.core5.http2.frame;

/**
 * HTTP/2 stream ID generator.
 *
 * @since 5.0
 */
public interface StreamIdGenerator {

    int generate(int previousMax);

    boolean isSameSide(int streamId);

    StreamIdGenerator ODD = new StreamIdGenerator() {

        @Override
        public int generate(final int previousMax) {
            int i = previousMax + 1;
            if (i % 2 == 0) {
                i++;
            }
            return i;
        }

        @Override
        public boolean isSameSide(final int streamId) {
            return (streamId & 1) == 1;
        }

    };

    StreamIdGenerator EVEN = new StreamIdGenerator() {

        @Override
        public int generate(final int previousMax) {
            int i = previousMax + 1;
            if (i % 2 == 1) {
                i++;
            }
            return i;
        }

        @Override
        public boolean isSameSide(final int streamId) {
            return (streamId & 1) == 0;
        }

    };

}