DefaultHeaders.java — netty Source File

Source Code

/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project 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:
 *
 * https://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 io.netty.handler.codec;

import io.netty.util.HashingStrategy;

import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.function.BiPredicate;

import static io.netty.util.HashingStrategy.JAVA_HASHER;
import static io.netty.util.internal.MathUtil.findNextPositivePowerOfTwo;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
import static java.lang.Math.max;
import static java.lang.Math.min;

/**
 * Default implementation of {@link Headers};
 *
 * @param <K> the type of the header name.
 * @param <V> the type of the header value.
 * @param <T> the type to use for return values when the intention is to return {@code this} object.
 */
public class DefaultHeaders<K, V, T extends Headers<K, V, T>> implements Headers<K, V, T> {
    /**
     * Constant used to seed the hash code generation. Could be anything but this was borrowed from murmur3.
     */
    static final int HASH_CODE_SEED = 0xc2b2ae35;

    private final HeaderEntry<K, V>[] entries;
    protected final HeaderEntry<K, V> head;

    private final byte hashMask;
    private final ValueConverter<V> valueConverter;
    private final NameValidator<K> nameValidator;
    private final ValueValidator<V> valueValidator;
    private final HashingStrategy<K> hashingStrategy;
    int size;

    public interface NameValidator<K> {
// ... (1415 more lines)