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Carefully designed and efficient extension of the Java Collections Framework with primitive specializations and more, built for Java 8 (Implementation)

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/*
 * Copyright 2014 the original author or authors.
 *
 * Licensed 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 com.koloboke.collect.impl.hash;

import com.koloboke.collect.*;
import com.koloboke.collect.hash.HashConfig;
import com.koloboke.collect.impl.*;
import com.koloboke.collect.map.*;
import com.koloboke.collect.map.hash.*;
import com.koloboke.collect.set.*;
import com.koloboke.collect.set.hash.*;
import java.util.function.BiConsumer;
import java.util.function.BiFunction;
import java.util.function.Predicate;
import com.koloboke.function.ObjByteConsumer;
import com.koloboke.function.ObjBytePredicate;
import com.koloboke.function.ObjByteToByteFunction;
import com.koloboke.function.ToByteFunction;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;
import com.koloboke.function.ByteBinaryOperator;
import com.koloboke.function.ByteConsumer;
import com.koloboke.function.BytePredicate;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;

import javax.annotation.Nonnull;
import java.util.*;


public class UpdatableQHashSeparateKVObjByteMapGO
        extends UpdatableQHashSeparateKVObjByteMapSO {

    @Override
    final void copy(SeparateKVObjByteQHash hash) {
        int myMC = modCount(),
                hashMC = hash.modCount();
        super.copy(hash);
        if (myMC != modCount() ||
                hashMC != hash.modCount())
            throw new ConcurrentModificationException();
    }

    @Override
    final void move(SeparateKVObjByteQHash hash) {
        int myMC = modCount(),
                hashMC = hash.modCount();
        super.move(hash);
        if (myMC != modCount() || 
                hashMC != hash.modCount())
            throw new ConcurrentModificationException();
    }


    @Override
    public byte defaultValue() {
        return (byte) 0;
    }

    @Override
    public boolean containsEntry(Object key, byte value) {
        int index = index(key);
        if (index >= 0) {
            // key is present
            return values[index] == value;
        } else {
            // key is absent
            return false;
        }
    }


    @Override
    public Byte get(Object key) {
        int index = index(key);
        if (index >= 0) {
            // key is present
            return values[index];
        } else {
            // key is absent
            return null;
        }
    }

    

    @Override
    public byte getByte(Object key) {
        int index = index(key);
        if (index >= 0) {
            // key is present
            return values[index];
        } else {
            // key is absent
            return defaultValue();
        }
    }

    @Override
    public Byte getOrDefault(Object key, Byte defaultValue) {
        int index = index(key);
        if (index >= 0) {
            // key is present
            return values[index];
        } else {
            // key is absent
            return defaultValue;
        }
    }

    @Override
    public byte getOrDefault(Object key, byte defaultValue) {
        int index = index(key);
        if (index >= 0) {
            // key is present
            return values[index];
        } else {
            // key is absent
            return defaultValue;
        }
    }

    @Override
    public void forEach(BiConsumer action) {
        if (action == null)
            throw new java.lang.NullPointerException();
        if (this.isEmpty())
            return;
        int mc = modCount();
        Object[] keys = set;
        byte[] vals = values;
        for (int i = keys.length - 1; i >= 0; i--) {
            K key;
            // noinspection unchecked
            if ((key = (K) keys[i]) != FREE) {
                action.accept(key, vals[i]);
            }
        }
        if (mc != modCount())
            throw new java.util.ConcurrentModificationException();
    }

    @Override
    public void forEach(ObjByteConsumer action) {
        if (action == null)
            throw new java.lang.NullPointerException();
        if (this.isEmpty())
            return;
        int mc = modCount();
        Object[] keys = set;
        byte[] vals = values;
        for (int i = keys.length - 1; i >= 0; i--) {
            K key;
            // noinspection unchecked
            if ((key = (K) keys[i]) != FREE) {
                action.accept(key, vals[i]);
            }
        }
        if (mc != modCount())
            throw new java.util.ConcurrentModificationException();
    }

    @Override
    public boolean forEachWhile(ObjBytePredicate predicate) {
        if (predicate == null)
            throw new java.lang.NullPointerException();
        if (this.isEmpty())
            return true;
        boolean terminated = false;
        int mc = modCount();
        Object[] keys = set;
        byte[] vals = values;
        for (int i = keys.length - 1; i >= 0; i--) {
            K key;
            // noinspection unchecked
            if ((key = (K) keys[i]) != FREE) {
                if (!predicate.test(key, vals[i])) {
                    terminated = true;
                    break;
                }
            }
        }
        if (mc != modCount())
            throw new java.util.ConcurrentModificationException();
        return !terminated;
    }

    @Nonnull
    @Override
    public ObjByteCursor cursor() {
        int mc = modCount();
        return new NoRemovedMapCursor(mc);
    }


    
    @SuppressWarnings("unchecked")
    @Override
    public boolean containsAllEntries(Map m) {
        return CommonObjByteMapOps.containsAllEntries(this, m);
    }

    @Override
    public boolean allEntriesContainingIn(InternalObjByteMapOps m) {
        if (this.isEmpty())
            return true;
        boolean containsAll = true;
        int mc = modCount();
        Object[] keys = set;
        byte[] vals = values;
        for (int i = keys.length - 1; i >= 0; i--) {
            K key;
            // noinspection unchecked
            if ((key = (K) keys[i]) != FREE) {
                if (!m.containsEntry(key, vals[i])) {
                    containsAll = false;
                    break;
                }
            }
        }
        if (mc != modCount())
            throw new java.util.ConcurrentModificationException();
        return containsAll;
    }

    @Override
    public void reversePutAllTo(InternalObjByteMapOps m) {
        if (this.isEmpty())
            return;
        int mc = modCount();
        Object[] keys = set;
        byte[] vals = values;
        for (int i = keys.length - 1; i >= 0; i--) {
            K key;
            // noinspection unchecked
            if ((key = (K) keys[i]) != FREE) {
                m.justPut(key, vals[i]);
            }
        }
        if (mc != modCount())
            throw new java.util.ConcurrentModificationException();
    }

    @Override
    @Nonnull
    public HashObjSet> entrySet() {
        return new EntryView();
    }

    @Override
    @Nonnull
    public ByteCollection values() {
        return new ValueView();
    }


    @Override
    public boolean equals(Object o) {
        return CommonMapOps.equals(this, o);
    }

    @Override
    public int hashCode() {
        int hashCode = 0;
        int mc = modCount();
        Object[] keys = set;
        byte[] vals = values;
        for (int i = keys.length - 1; i >= 0; i--) {
            K key;
            // noinspection unchecked
            if ((key = (K) keys[i]) != FREE) {
                hashCode += nullableKeyHashCode(key) ^ vals[i];
            }
        }
        if (mc != modCount())
            throw new java.util.ConcurrentModificationException();
        return hashCode;
    }


    @Override
    public String toString() {
        if (this.isEmpty())
            return "{}";
        StringBuilder sb = new StringBuilder();
        int elementCount = 0;
        int mc = modCount();
        Object[] keys = set;
        byte[] vals = values;
        for (int i = keys.length - 1; i >= 0; i--) {
            K key;
            // noinspection unchecked
            if ((key = (K) keys[i]) != FREE) {
                sb.append(' ');
                sb.append(key != (Object) this ? key : "(this Map)");
                sb.append('=');
                sb.append(vals[i]);
                sb.append(',');
                if (++elementCount == 8) {
                    int expectedLength = sb.length() * (size() / 8);
                    sb.ensureCapacity(expectedLength + (expectedLength / 2));
                }
            }
        }
        if (mc != modCount())
            throw new java.util.ConcurrentModificationException();
        sb.setCharAt(0, '{');
        sb.setCharAt(sb.length() - 1, '}');
        return sb.toString();
    }


    @Override
    void rehash(int newCapacity) {
        int mc = modCount();
        Object[] keys = set;
        byte[] vals = values;
        initForRehash(newCapacity);
        mc++; // modCount is incremented in initForRehash()
        Object[] newKeys = set;
        int capacity = newKeys.length;
        byte[] newVals = values;
        for (int i = keys.length - 1; i >= 0; i--) {
            K key;
            // noinspection unchecked
            if ((key = (K) keys[i]) != FREE) {
                int index;
                if (newKeys[index = SeparateKVObjKeyMixing.mix(nullableKeyHashCode(key)) % capacity] != FREE) {
                    int bIndex = index, fIndex = index, step = 1;
                    while (true) {
                        if ((bIndex -= step) < 0) bIndex += capacity;
                        if (newKeys[bIndex] == FREE) {
                            index = bIndex;
                            break;
                        }
                        int t;
                        if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                        if (newKeys[fIndex] == FREE) {
                            index = fIndex;
                            break;
                        }
                        step += 2;
                    }
                }
                newKeys[index] = key;
                newVals[index] = vals[i];
            }
        }
        if (mc != modCount())
            throw new java.util.ConcurrentModificationException();
    }


    @Override
    public Byte put(K key, Byte value) {
        int index = insert(key, value);
        if (index < 0) {
            // key was absent
            return null;
        } else {
            // key is present
            byte[] vals = values;
            byte prevValue = vals[index];
            vals[index] = value;
            return prevValue;
        }
    }

    @Override
    public byte put(K key, byte value) {
        int index = insert(key, value);
        if (index < 0) {
            // key was absent
            return defaultValue();
        } else {
            // key is present
            byte[] vals = values;
            byte prevValue = vals[index];
            vals[index] = value;
            return prevValue;
        }
    }

    @Override
    public Byte putIfAbsent(K key, Byte value) {
        int index = insert(key, value);
        if (index < 0) {
            // key was absent
            return null;
        } else {
            // key is present
            return values[index];
        }
    }

    @Override
    public byte putIfAbsent(K key, byte value) {
        int index = insert(key, value);
        if (index < 0) {
            // key was absent
            return defaultValue();
        } else {
            // key is present
            return values[index];
        }
    }

    @Override
    public void justPut(K key, byte value) {
        int index = insert(key, value);
        if (index < 0) {
            // key was absent
            return;
        } else {
            // key is present
            values[index] = value;
            return;
        }
    }


    @Override
    public Byte compute(K key,
            BiFunction remappingFunction) {
        if (key != null) {
            if (remappingFunction == null)
                throw new java.lang.NullPointerException();
            Object[] keys = set;
            byte[] vals = values;
            int capacity, index;
            Object cur;
            keyPresent:
            if ((cur = keys[index = SeparateKVObjKeyMixing.mix(keyHashCode(key)) % (capacity = keys.length)]) != key) {
                keyAbsent:
                if (cur != FREE) {
                    if (keyEquals(key, (K) cur)) {
                        break keyPresent;
                    } else {
                        int bIndex = index, fIndex = index, step = 1;
                        while (true) {
                            if ((bIndex -= step) < 0) bIndex += capacity;
                            if ((cur = keys[bIndex]) == key) {
                                index = bIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = bIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = bIndex;
                                break keyPresent;
                            }
                            int t;
                            if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                            if ((cur = keys[fIndex]) == key) {
                                index = fIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = fIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = fIndex;
                                break keyPresent;
                            }
                            step += 2;
                        }
                    }
                }
                // key is absent
                Byte newValue = remappingFunction.apply(key, null);
                if (newValue != null) {
                    incrementModCount();
                    keys[index] = key;
                    vals[index] = newValue;
                    postInsertHook();
                    return newValue;
                } else {
                    return null;
                }
            }
            // key is present
            Byte newValue = remappingFunction.apply(key, vals[index]);
            if (newValue != null) {
                vals[index] = newValue;
                return newValue;
            } else {
                throw new java.lang.UnsupportedOperationException("Compute operation of updatable map doesn't support removals");
            }
        } else {
            return computeNullKey(remappingFunction);
        }
    }

    Byte computeNullKey(
            BiFunction remappingFunction) {
        if (remappingFunction == null)
            throw new java.lang.NullPointerException();
        Object[] keys = set;
        byte[] vals = values;
        int capacity = keys.length;
        int index;
        Object cur;
        keyPresent:
        if ((cur = keys[index = 0]) != null) {
            keyAbsent:
            if (cur != FREE) {
                int bIndex = index, fIndex = index, step = 1;
                while (true) {
                    if ((bIndex -= step) < 0) bIndex += capacity;
                    if ((cur = keys[bIndex]) == null) {
                        index = bIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = bIndex;
                        break keyAbsent;
                    }
                    int t;
                    if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                    if ((cur = keys[fIndex]) == null) {
                        index = fIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = fIndex;
                        break keyAbsent;
                    }
                    step += 2;
                }
            }
            // key is absent
            Byte newValue = remappingFunction.apply(null, null);
            if (newValue != null) {
                incrementModCount();
                keys[index] = null;
                vals[index] = newValue;
                postInsertHook();
                return newValue;
            } else {
                return null;
            }
        }
        // key is present
        Byte newValue = remappingFunction.apply(null, vals[index]);
        if (newValue != null) {
            vals[index] = newValue;
            return newValue;
        } else {
            throw new java.lang.UnsupportedOperationException("Compute operation of updatable map doesn't support removals");
        }
    }

    @Override
    public byte compute(K key, ObjByteToByteFunction remappingFunction) {
        if (key != null) {
            if (remappingFunction == null)
                throw new java.lang.NullPointerException();
            Object[] keys = set;
            byte[] vals = values;
            int capacity, index;
            Object cur;
            keyPresent:
            if ((cur = keys[index = SeparateKVObjKeyMixing.mix(keyHashCode(key)) % (capacity = keys.length)]) != key) {
                keyAbsent:
                if (cur != FREE) {
                    if (keyEquals(key, (K) cur)) {
                        break keyPresent;
                    } else {
                        int bIndex = index, fIndex = index, step = 1;
                        while (true) {
                            if ((bIndex -= step) < 0) bIndex += capacity;
                            if ((cur = keys[bIndex]) == key) {
                                index = bIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = bIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = bIndex;
                                break keyPresent;
                            }
                            int t;
                            if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                            if ((cur = keys[fIndex]) == key) {
                                index = fIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = fIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = fIndex;
                                break keyPresent;
                            }
                            step += 2;
                        }
                    }
                }
                // key is absent
                byte newValue = remappingFunction.applyAsByte(key, defaultValue());
                incrementModCount();
                keys[index] = key;
                vals[index] = newValue;
                postInsertHook();
                return newValue;
            }
            // key is present
            byte newValue = remappingFunction.applyAsByte(key, vals[index]);
            vals[index] = newValue;
            return newValue;
        } else {
            return computeNullKey(remappingFunction);
        }
    }

    byte computeNullKey(ObjByteToByteFunction remappingFunction) {
        if (remappingFunction == null)
            throw new java.lang.NullPointerException();
        Object[] keys = set;
        byte[] vals = values;
        int capacity = keys.length;
        int index;
        Object cur;
        keyPresent:
        if ((cur = keys[index = 0]) != null) {
            keyAbsent:
            if (cur != FREE) {
                int bIndex = index, fIndex = index, step = 1;
                while (true) {
                    if ((bIndex -= step) < 0) bIndex += capacity;
                    if ((cur = keys[bIndex]) == null) {
                        index = bIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = bIndex;
                        break keyAbsent;
                    }
                    int t;
                    if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                    if ((cur = keys[fIndex]) == null) {
                        index = fIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = fIndex;
                        break keyAbsent;
                    }
                    step += 2;
                }
            }
            // key is absent
            byte newValue = remappingFunction.applyAsByte(null, defaultValue());
            incrementModCount();
            keys[index] = null;
            vals[index] = newValue;
            postInsertHook();
            return newValue;
        }
        // key is present
        byte newValue = remappingFunction.applyAsByte(null, vals[index]);
        vals[index] = newValue;
        return newValue;
    }

    @Override
    public Byte computeIfAbsent(K key,
            Function mappingFunction) {
        if (key != null) {
            if (mappingFunction == null)
                throw new java.lang.NullPointerException();
            Object[] keys = set;
            byte[] vals = values;
            int capacity, index;
            Object cur;
            if ((cur = keys[index = SeparateKVObjKeyMixing.mix(keyHashCode(key)) % (capacity = keys.length)]) == key) {
                // key is present
                return vals[index];
            } else {
                keyAbsent:
                if (cur != FREE) {
                    if (keyEquals(key, (K) cur)) {
                        // key is present
                        return vals[index];
                    } else {
                        int bIndex = index, fIndex = index, step = 1;
                        while (true) {
                            if ((bIndex -= step) < 0) bIndex += capacity;
                            if ((cur = keys[bIndex]) == key) {
                                // key is present
                                return vals[bIndex];
                            } else if (cur == FREE) {
                                index = bIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                // key is present
                                return vals[bIndex];
                            }
                            int t;
                            if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                            if ((cur = keys[fIndex]) == key) {
                                // key is present
                                return vals[fIndex];
                            } else if (cur == FREE) {
                                index = fIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                // key is present
                                return vals[fIndex];
                            }
                            step += 2;
                        }
                    }
                }
                // key is absent
                Byte value = mappingFunction.apply(key);
                if (value != null) {
                    incrementModCount();
                    keys[index] = key;
                    vals[index] = value;
                    postInsertHook();
                    return value;
                } else {
                    return null;
                }
            }
        } else {
            return computeIfAbsentNullKey(mappingFunction);
        }
    }

    Byte computeIfAbsentNullKey(
            Function mappingFunction) {
        if (mappingFunction == null)
            throw new java.lang.NullPointerException();
        Object[] keys = set;
        byte[] vals = values;
        int capacity = keys.length;
        int index;
        Object cur;
        if ((cur = keys[index = 0]) == null) {
            // key is present
            return vals[index];
        } else {
            keyAbsent:
            if (cur != FREE) {
                int bIndex = index, fIndex = index, step = 1;
                while (true) {
                    if ((bIndex -= step) < 0) bIndex += capacity;
                    if ((cur = keys[bIndex]) == null) {
                        // key is present
                        return vals[bIndex];
                    } else if (cur == FREE) {
                        index = bIndex;
                        break keyAbsent;
                    }
                    int t;
                    if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                    if ((cur = keys[fIndex]) == null) {
                        // key is present
                        return vals[fIndex];
                    } else if (cur == FREE) {
                        index = fIndex;
                        break keyAbsent;
                    }
                    step += 2;
                }
            }
            // key is absent
            Byte value = mappingFunction.apply(null);
            if (value != null) {
                incrementModCount();
                keys[index] = null;
                vals[index] = value;
                postInsertHook();
                return value;
            } else {
                return null;
            }
        }
    }

    @Override
    public byte computeIfAbsent(K key, ToByteFunction mappingFunction) {
        if (key != null) {
            if (mappingFunction == null)
                throw new java.lang.NullPointerException();
            Object[] keys = set;
            byte[] vals = values;
            int capacity, index;
            Object cur;
            if ((cur = keys[index = SeparateKVObjKeyMixing.mix(keyHashCode(key)) % (capacity = keys.length)]) == key) {
                // key is present
                return vals[index];
            } else {
                keyAbsent:
                if (cur != FREE) {
                    if (keyEquals(key, (K) cur)) {
                        // key is present
                        return vals[index];
                    } else {
                        int bIndex = index, fIndex = index, step = 1;
                        while (true) {
                            if ((bIndex -= step) < 0) bIndex += capacity;
                            if ((cur = keys[bIndex]) == key) {
                                // key is present
                                return vals[bIndex];
                            } else if (cur == FREE) {
                                index = bIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                // key is present
                                return vals[bIndex];
                            }
                            int t;
                            if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                            if ((cur = keys[fIndex]) == key) {
                                // key is present
                                return vals[fIndex];
                            } else if (cur == FREE) {
                                index = fIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                // key is present
                                return vals[fIndex];
                            }
                            step += 2;
                        }
                    }
                }
                // key is absent
                byte value = mappingFunction.applyAsByte(key);
                incrementModCount();
                keys[index] = key;
                vals[index] = value;
                postInsertHook();
                return value;
            }
        } else {
            return computeIfAbsentNullKey(mappingFunction);
        }
    }

    byte computeIfAbsentNullKey(ToByteFunction mappingFunction) {
        if (mappingFunction == null)
            throw new java.lang.NullPointerException();
        Object[] keys = set;
        byte[] vals = values;
        int capacity = keys.length;
        int index;
        Object cur;
        if ((cur = keys[index = 0]) == null) {
            // key is present
            return vals[index];
        } else {
            keyAbsent:
            if (cur != FREE) {
                int bIndex = index, fIndex = index, step = 1;
                while (true) {
                    if ((bIndex -= step) < 0) bIndex += capacity;
                    if ((cur = keys[bIndex]) == null) {
                        // key is present
                        return vals[bIndex];
                    } else if (cur == FREE) {
                        index = bIndex;
                        break keyAbsent;
                    }
                    int t;
                    if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                    if ((cur = keys[fIndex]) == null) {
                        // key is present
                        return vals[fIndex];
                    } else if (cur == FREE) {
                        index = fIndex;
                        break keyAbsent;
                    }
                    step += 2;
                }
            }
            // key is absent
            byte value = mappingFunction.applyAsByte(null);
            incrementModCount();
            keys[index] = null;
            vals[index] = value;
            postInsertHook();
            return value;
        }
    }

    @Override
    public Byte computeIfPresent(K key,
            BiFunction remappingFunction) {
        if (remappingFunction == null)
            throw new java.lang.NullPointerException();
        int index = index(key);
        if (index >= 0) {
            // key is present
            byte[] vals = values;
            Byte newValue = remappingFunction.apply(key, vals[index]);
            if (newValue != null) {
                vals[index] = newValue;
                return newValue;
            } else {
                throw new java.lang.UnsupportedOperationException("ComputeIfPresent operation of updatable map doesn't support removals");
            }
        } else {
            // key is absent
            return null;
        }
    }

    @Override
    public byte computeIfPresent(K key, ObjByteToByteFunction remappingFunction) {
        if (remappingFunction == null)
            throw new java.lang.NullPointerException();
        int index = index(key);
        if (index >= 0) {
            // key is present
            byte[] vals = values;
            byte newValue = remappingFunction.applyAsByte(key, vals[index]);
            vals[index] = newValue;
            return newValue;
        } else {
            // key is absent
            return defaultValue();
        }
    }

    @Override
    public Byte merge(K key, Byte value,
            BiFunction remappingFunction) {
        if (key != null) {
            if (value == null)
                throw new java.lang.NullPointerException();
            if (remappingFunction == null)
                throw new java.lang.NullPointerException();
            Object[] keys = set;
            byte[] vals = values;
            int capacity, index;
            Object cur;
            keyPresent:
            if ((cur = keys[index = SeparateKVObjKeyMixing.mix(keyHashCode(key)) % (capacity = keys.length)]) != key) {
                keyAbsent:
                if (cur != FREE) {
                    if (keyEquals(key, (K) cur)) {
                        break keyPresent;
                    } else {
                        int bIndex = index, fIndex = index, step = 1;
                        while (true) {
                            if ((bIndex -= step) < 0) bIndex += capacity;
                            if ((cur = keys[bIndex]) == key) {
                                index = bIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = bIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = bIndex;
                                break keyPresent;
                            }
                            int t;
                            if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                            if ((cur = keys[fIndex]) == key) {
                                index = fIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = fIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = fIndex;
                                break keyPresent;
                            }
                            step += 2;
                        }
                    }
                }
                // key is absent
                incrementModCount();
                keys[index] = key;
                vals[index] = value;
                postInsertHook();
                return value;
            }
            // key is present
            Byte newValue = remappingFunction.apply(vals[index], value);
            if (newValue != null) {
                vals[index] = newValue;
                return newValue;
            } else {
                throw new java.lang.UnsupportedOperationException("Merge operation of updatable map doesn't support removals");
            }
        } else {
            return mergeNullKey(value, remappingFunction);
        }
    }

    Byte mergeNullKey(Byte value,
            BiFunction remappingFunction) {
        if (value == null)
            throw new java.lang.NullPointerException();
        if (remappingFunction == null)
            throw new java.lang.NullPointerException();
        Object[] keys = set;
        byte[] vals = values;
        int capacity = keys.length;
        int index;
        Object cur;
        keyPresent:
        if ((cur = keys[index = 0]) != null) {
            keyAbsent:
            if (cur != FREE) {
                int bIndex = index, fIndex = index, step = 1;
                while (true) {
                    if ((bIndex -= step) < 0) bIndex += capacity;
                    if ((cur = keys[bIndex]) == null) {
                        index = bIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = bIndex;
                        break keyAbsent;
                    }
                    int t;
                    if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                    if ((cur = keys[fIndex]) == null) {
                        index = fIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = fIndex;
                        break keyAbsent;
                    }
                    step += 2;
                }
            }
            // key is absent
            incrementModCount();
            keys[index] = null;
            vals[index] = value;
            postInsertHook();
            return value;
        }
        // key is present
        Byte newValue = remappingFunction.apply(vals[index], value);
        if (newValue != null) {
            vals[index] = newValue;
            return newValue;
        } else {
            throw new java.lang.UnsupportedOperationException("Merge operation of updatable map doesn't support removals");
        }
    }

    @Override
    public byte merge(K key, byte value, ByteBinaryOperator remappingFunction) {
        if (key != null) {
            if (remappingFunction == null)
                throw new java.lang.NullPointerException();
            Object[] keys = set;
            byte[] vals = values;
            int capacity, index;
            Object cur;
            keyPresent:
            if ((cur = keys[index = SeparateKVObjKeyMixing.mix(keyHashCode(key)) % (capacity = keys.length)]) != key) {
                keyAbsent:
                if (cur != FREE) {
                    if (keyEquals(key, (K) cur)) {
                        break keyPresent;
                    } else {
                        int bIndex = index, fIndex = index, step = 1;
                        while (true) {
                            if ((bIndex -= step) < 0) bIndex += capacity;
                            if ((cur = keys[bIndex]) == key) {
                                index = bIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = bIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = bIndex;
                                break keyPresent;
                            }
                            int t;
                            if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                            if ((cur = keys[fIndex]) == key) {
                                index = fIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = fIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = fIndex;
                                break keyPresent;
                            }
                            step += 2;
                        }
                    }
                }
                // key is absent
                incrementModCount();
                keys[index] = key;
                vals[index] = value;
                postInsertHook();
                return value;
            }
            // key is present
            byte newValue = remappingFunction.applyAsByte(vals[index], value);
            vals[index] = newValue;
            return newValue;
        } else {
            return mergeNullKey(value, remappingFunction);
        }
    }

    byte mergeNullKey(byte value, ByteBinaryOperator remappingFunction) {
        if (remappingFunction == null)
            throw new java.lang.NullPointerException();
        Object[] keys = set;
        byte[] vals = values;
        int capacity = keys.length;
        int index;
        Object cur;
        keyPresent:
        if ((cur = keys[index = 0]) != null) {
            keyAbsent:
            if (cur != FREE) {
                int bIndex = index, fIndex = index, step = 1;
                while (true) {
                    if ((bIndex -= step) < 0) bIndex += capacity;
                    if ((cur = keys[bIndex]) == null) {
                        index = bIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = bIndex;
                        break keyAbsent;
                    }
                    int t;
                    if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                    if ((cur = keys[fIndex]) == null) {
                        index = fIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = fIndex;
                        break keyAbsent;
                    }
                    step += 2;
                }
            }
            // key is absent
            incrementModCount();
            keys[index] = null;
            vals[index] = value;
            postInsertHook();
            return value;
        }
        // key is present
        byte newValue = remappingFunction.applyAsByte(vals[index], value);
        vals[index] = newValue;
        return newValue;
    }

    @Override
    public byte addValue(K key, byte value) {
        if (key != null) {
            Object[] keys = set;
            byte[] vals = values;
            int capacity, index;
            Object cur;
            keyPresent:
            if ((cur = keys[index = SeparateKVObjKeyMixing.mix(keyHashCode(key)) % (capacity = keys.length)]) != key) {
                keyAbsent:
                if (cur != FREE) {
                    if (keyEquals(key, (K) cur)) {
                        break keyPresent;
                    } else {
                        int bIndex = index, fIndex = index, step = 1;
                        while (true) {
                            if ((bIndex -= step) < 0) bIndex += capacity;
                            if ((cur = keys[bIndex]) == key) {
                                index = bIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = bIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = bIndex;
                                break keyPresent;
                            }
                            int t;
                            if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                            if ((cur = keys[fIndex]) == key) {
                                index = fIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = fIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = fIndex;
                                break keyPresent;
                            }
                            step += 2;
                        }
                    }
                }
                // key is absent
                byte newValue = (byte) (defaultValue() + value);
                incrementModCount();
                keys[index] = key;
                vals[index] = newValue;
                postInsertHook();
                return newValue;
            }
            // key is present
            byte newValue = (byte) (vals[index] + value);
            vals[index] = newValue;
            return newValue;
        } else {
            return addValueNullKey(value);
        }
    }

    byte addValueNullKey(byte value) {
        Object[] keys = set;
        byte[] vals = values;
        int capacity = keys.length;
        int index;
        Object cur;
        keyPresent:
        if ((cur = keys[index = 0]) != null) {
            keyAbsent:
            if (cur != FREE) {
                int bIndex = index, fIndex = index, step = 1;
                while (true) {
                    if ((bIndex -= step) < 0) bIndex += capacity;
                    if ((cur = keys[bIndex]) == null) {
                        index = bIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = bIndex;
                        break keyAbsent;
                    }
                    int t;
                    if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                    if ((cur = keys[fIndex]) == null) {
                        index = fIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = fIndex;
                        break keyAbsent;
                    }
                    step += 2;
                }
            }
            // key is absent
            byte newValue = (byte) (defaultValue() + value);
            incrementModCount();
            keys[index] = null;
            vals[index] = newValue;
            postInsertHook();
            return newValue;
        }
        // key is present
        byte newValue = (byte) (vals[index] + value);
        vals[index] = newValue;
        return newValue;
    }

    @Override
    public byte addValue(K key, byte addition, byte initialValue) {
        if (key != null) {
            Object[] keys = set;
            byte[] vals = values;
            int capacity, index;
            Object cur;
            keyPresent:
            if ((cur = keys[index = SeparateKVObjKeyMixing.mix(keyHashCode(key)) % (capacity = keys.length)]) != key) {
                keyAbsent:
                if (cur != FREE) {
                    if (keyEquals(key, (K) cur)) {
                        break keyPresent;
                    } else {
                        int bIndex = index, fIndex = index, step = 1;
                        while (true) {
                            if ((bIndex -= step) < 0) bIndex += capacity;
                            if ((cur = keys[bIndex]) == key) {
                                index = bIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = bIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = bIndex;
                                break keyPresent;
                            }
                            int t;
                            if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                            if ((cur = keys[fIndex]) == key) {
                                index = fIndex;
                                break keyPresent;
                            } else if (cur == FREE) {
                                index = fIndex;
                                break keyAbsent;
                            }
                            else if (keyEquals(key, (K) cur)) {
                                index = fIndex;
                                break keyPresent;
                            }
                            step += 2;
                        }
                    }
                }
                // key is absent
                byte newValue = (byte) (initialValue + addition);
                incrementModCount();
                keys[index] = key;
                vals[index] = newValue;
                postInsertHook();
                return newValue;
            }
            // key is present
            byte newValue = (byte) (vals[index] + addition);
            vals[index] = newValue;
            return newValue;
        } else {
            return addValueWithInitialNullKey(addition, initialValue);
        }
    }

    byte addValueWithInitialNullKey(byte addition, byte initialValue) {
        Object[] keys = set;
        byte[] vals = values;
        int capacity = keys.length;
        int index;
        Object cur;
        keyPresent:
        if ((cur = keys[index = 0]) != null) {
            keyAbsent:
            if (cur != FREE) {
                int bIndex = index, fIndex = index, step = 1;
                while (true) {
                    if ((bIndex -= step) < 0) bIndex += capacity;
                    if ((cur = keys[bIndex]) == null) {
                        index = bIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = bIndex;
                        break keyAbsent;
                    }
                    int t;
                    if ((t = (fIndex += step) - capacity) >= 0) fIndex = t;
                    if ((cur = keys[fIndex]) == null) {
                        index = fIndex;
                        break keyPresent;
                    } else if (cur == FREE) {
                        index = fIndex;
                        break keyAbsent;
                    }
                    step += 2;
                }
            }
            // key is absent
            byte newValue = (byte) (initialValue + addition);
            incrementModCount();
            keys[index] = null;
            vals[index] = newValue;
            postInsertHook();
            return newValue;
        }
        // key is present
        byte newValue = (byte) (vals[index] + addition);
        vals[index] = newValue;
        return newValue;
    }


    
    @Override
    public void putAll(@Nonnull Map m) {
        CommonObjByteMapOps.putAll(this, m);
    }


    @Override
    public Byte replace(K key, Byte value) {
        int index = index(key);
        if (index >= 0) {
            // key is present
            byte[] vals = values;
            byte oldValue = vals[index];
            vals[index] = value;
            return oldValue;
        } else {
            // key is absent
            return null;
        }
    }

    @Override
    public byte replace(K key, byte value) {
        int index = index(key);
        if (index >= 0) {
            // key is present
            byte[] vals = values;
            byte oldValue = vals[index];
            vals[index] = value;
            return oldValue;
        } else {
            // key is absent
            return defaultValue();
        }
    }

    @Override
    public boolean replace(K key, Byte oldValue, Byte newValue) {
        return replace(key,
                oldValue.byteValue(),
                newValue.byteValue());
    }

    @Override
    public boolean replace(K key, byte oldValue, byte newValue) {
        int index = index(key);
        if (index >= 0) {
            // key is present
            byte[] vals = values;
            if (vals[index] == oldValue) {
                vals[index] = newValue;
                return true;
            } else {
                return false;
            }
        } else {
            // key is absent
            return false;
        }
    }


    @Override
    public void replaceAll(
            BiFunction function) {
        if (function == null)
            throw new java.lang.NullPointerException();
        if (this.isEmpty())
            return;
        int mc = modCount();
        Object[] keys = set;
        byte[] vals = values;
        for (int i = keys.length - 1; i >= 0; i--) {
            K key;
            // noinspection unchecked
            if ((key = (K) keys[i]) != FREE) {
                vals[i] = function.apply(key, vals[i]);
            }
        }
        if (mc != modCount())
            throw new java.util.ConcurrentModificationException();
    }

    @Override
    public void replaceAll(ObjByteToByteFunction function) {
        if (function == null)
            throw new java.lang.NullPointerException();
        if (this.isEmpty())
            return;
        int mc = modCount();
        Object[] keys = set;
        byte[] vals = values;
        for (int i = keys.length - 1; i >= 0; i--) {
            K key;
            // noinspection unchecked
            if ((key = (K) keys[i]) != FREE) {
                vals[i] = function.applyAsByte(key, vals[i]);
            }
        }
        if (mc != modCount())
            throw new java.util.ConcurrentModificationException();
    }


    @Override
    public void clear() {
        doClear();
    }

    private void doClear() {
        int mc = modCount() + 1;
        super.clear();
        if (mc != modCount())
            throw new ConcurrentModificationException();
    }



    @Override
    public Byte remove(Object key) {
        throw new java.lang.UnsupportedOperationException();
    }

    Byte removeNullKey() {
        throw new java.lang.UnsupportedOperationException();
    }

    @Override
    public boolean justRemove(Object key) {
        throw new java.lang.UnsupportedOperationException();
    }

    boolean justRemoveNullKey() {
        throw new java.lang.UnsupportedOperationException();
    }


    

    @Override
    public byte removeAsByte(Object key) {
        throw new java.lang.UnsupportedOperationException();
    }

    byte removeAsByteNullKey() {
        throw new java.lang.UnsupportedOperationException();
    }


    @Override
    public boolean remove(Object key, Object value) {
        return remove(key,
                ((Byte) value).byteValue()
                );
    }

    @Override
    public boolean remove(Object key, byte value) {
        throw new java.lang.UnsupportedOperationException();
    }

    boolean removeEntryNullKey(byte value) {
        throw new java.lang.UnsupportedOperationException();
    }

    @Override
    public boolean removeIf(ObjBytePredicate filter) {
        throw new java.lang.UnsupportedOperationException();
    }






    class EntryView extends AbstractSetView>
            implements HashObjSet>,
            InternalObjCollectionOps> {

        @Nonnull
        @Override
        public Equivalence> equivalence() {
            return Equivalence.entryEquivalence(
                    keyEquivalence(),
                    Equivalence.defaultEquality()
                    
            );
        }

        @Nonnull
        @Override
        public HashConfig hashConfig() {
            return UpdatableQHashSeparateKVObjByteMapGO.this.hashConfig();
        }


        @Override
        public int size() {
            // Read field instead of calling size() to avoid infinite recursive calls in Koloboke
            // Compile-generated map, if it extends AbstractMap
            return size;
        }

        @Override
        public double currentLoad() {
            return UpdatableQHashSeparateKVObjByteMapGO.this.currentLoad();
        }


        @Override
        @SuppressWarnings("unchecked")
        public boolean contains(Object o) {
            try {
                Map.Entry e = (Map.Entry) o;
                return containsEntry(e.getKey(), e.getValue());
            } catch (NullPointerException e) {
                return false;
            } catch (ClassCastException e) {
                return false;
            }
        }


        @Override
        @Nonnull
        public final Object[] toArray() {
            int size = size();
            Object[] result = new Object[size];
            if (size == 0)
                return result;
            int resultIndex = 0;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                K key;
                // noinspection unchecked
                if ((key = (K) keys[i]) != FREE) {
                    result[resultIndex++] = new MutableEntry(mc, i, key, vals[i]);
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            return result;
        }

        @Override
        @SuppressWarnings("unchecked")
        @Nonnull
        public final  T[] toArray(@Nonnull T[] a) {
            int size = size();
            if (a.length < size) {
                Class elementType = a.getClass().getComponentType();
                a = (T[]) java.lang.reflect.Array.newInstance(elementType, size);
            }
            if (size == 0) {
                if (a.length > 0)
                    a[0] = null;
                return a;
            }
            int resultIndex = 0;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                K key;
                // noinspection unchecked
                if ((key = (K) keys[i]) != FREE) {
                    a[resultIndex++] = (T) new MutableEntry(mc, i, key, vals[i]);
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            if (a.length > resultIndex)
                a[resultIndex] = null;
            return a;
        }

        @Override
        public final void forEach(@Nonnull Consumer> action) {
            if (action == null)
                throw new java.lang.NullPointerException();
            if (this.isEmpty())
                return;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                K key;
                // noinspection unchecked
                if ((key = (K) keys[i]) != FREE) {
                    action.accept(new MutableEntry(mc, i, key, vals[i]));
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
        }

        @Override
        public boolean forEachWhile(@Nonnull  Predicate> predicate) {
            if (predicate == null)
                throw new java.lang.NullPointerException();
            if (this.isEmpty())
                return true;
            boolean terminated = false;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                K key;
                // noinspection unchecked
                if ((key = (K) keys[i]) != FREE) {
                    if (!predicate.test(new MutableEntry(mc, i, key, vals[i]))) {
                        terminated = true;
                        break;
                    }
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            return !terminated;
        }

        @Override
        @Nonnull
        public ObjIterator> iterator() {
            int mc = modCount();
            return new NoRemovedEntryIterator(
                    mc);
        }

        @Nonnull
        @Override
        public ObjCursor> cursor() {
            int mc = modCount();
            return new NoRemovedEntryCursor(
                    mc);
        }

        @Override
        public final boolean containsAll(@Nonnull Collection c) {
            return CommonObjCollectionOps.containsAll(this, c);
        }

        @Override
        public final boolean allContainingIn(ObjCollection c) {
            if (this.isEmpty())
                return true;
            boolean containsAll = true;
            ReusableEntry e = new ReusableEntry();
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                K key;
                // noinspection unchecked
                if ((key = (K) keys[i]) != FREE) {
                    if (!c.contains(e.with(key, vals[i]))) {
                        containsAll = false;
                        break;
                    }
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            return containsAll;
        }

        @Override
        public boolean reverseRemoveAllFrom(ObjSet s) {
            if (this.isEmpty() || s.isEmpty())
                return false;
            boolean changed = false;
            ReusableEntry e = new ReusableEntry();
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                K key;
                // noinspection unchecked
                if ((key = (K) keys[i]) != FREE) {
                    changed |= s.remove(e.with(key, vals[i]));
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            return changed;
        }

        @Override
        public final boolean reverseAddAllTo(ObjCollection> c) {
            if (this.isEmpty())
                return false;
            boolean changed = false;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                K key;
                // noinspection unchecked
                if ((key = (K) keys[i]) != FREE) {
                    changed |= c.add(new MutableEntry(mc, i, key, vals[i]));
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            return changed;
        }


        public int hashCode() {
            return UpdatableQHashSeparateKVObjByteMapGO.this.hashCode();
        }


        @Override
        public String toString() {
            if (this.isEmpty())
                return "[]";
            StringBuilder sb = new StringBuilder();
            int elementCount = 0;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                K key;
                // noinspection unchecked
                if ((key = (K) keys[i]) != FREE) {
                    sb.append(' ');
                    sb.append(key != (Object) this ? key : "(this Collection)");
                    sb.append('=');
                    sb.append(vals[i]);
                    sb.append(',');
                    if (++elementCount == 8) {
                        int expectedLength = sb.length() * (size() / 8);
                        sb.ensureCapacity(expectedLength + (expectedLength / 2));
                    }
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            sb.setCharAt(0, '[');
            sb.setCharAt(sb.length() - 1, ']');
            return sb.toString();
        }

        @Override
        public boolean shrink() {
            return UpdatableQHashSeparateKVObjByteMapGO.this.shrink();
        }


        @Override
        @SuppressWarnings("unchecked")
        public boolean remove(Object o) {
            try {
                Map.Entry e = (Map.Entry) o;
                K key = e.getKey();
                byte value = e.getValue();
                return UpdatableQHashSeparateKVObjByteMapGO.this.remove(key, value);
            } catch (NullPointerException e) {
                return false;
            } catch (ClassCastException e) {
                return false;
            }
        }


        @Override
        public final boolean removeIf(@Nonnull Predicate> filter) {
            throw new java.lang.UnsupportedOperationException();
        }

        @SuppressWarnings("unchecked")
        @Override
        public final boolean removeAll(@Nonnull Collection c) {
            if (c instanceof InternalObjCollectionOps) {
                InternalObjCollectionOps c2 = (InternalObjCollectionOps) c;
                if (equivalence().equals(c2.equivalence()) && c2.size() < this.size()) {
                    c2.reverseRemoveAllFrom(this);
                }
            }
            throw new java.lang.UnsupportedOperationException();
        }

        @Override
        public final boolean retainAll(@Nonnull Collection c) {
            throw new java.lang.UnsupportedOperationException();
        }

        @Override
        public void clear() {
            // Don't call map.clear() directly to avoid infinite recursive calls in Koloboke
            // Compile-generated map, if it extends AbstractMap
            UpdatableQHashSeparateKVObjByteMapGO.this.doClear();
        }
    }


    abstract class ObjByteEntry extends AbstractEntry {

        abstract K key();

        @Override
        public final K getKey() {
            return key();
        }

        abstract byte value();

        @Override
        public final Byte getValue() {
            return value();
        }

        @SuppressWarnings("unchecked")
        @Override
        public boolean equals(Object o) {
            Map.Entry e2;
            K k2;
            byte v2;
            try {
                e2 = (Map.Entry) o;
                k2 = (K) e2.getKey();
                v2 = (Byte) e2.getValue();
                return                         // This is important to pass Koloboke's key as the second parameter
                        // and always call nullableKeyEquivalence() (that checks keys are identical
                        // before calling keyEquals()) for compliance with @CustomKeyEquivalence
                        // contract
                        nullableKeyEquals(k2, key())
                        &&
                        value() == v2
                        ;
            } catch (ClassCastException e) {
                return false;
            } catch (NullPointerException e) {
                return false;
            }
        }

        @Override
        public int hashCode() {
            return nullableKeyHashCode(key())
                    ^
                    Primitives.hashCode(value())
                    ;
        }
    }


    class MutableEntry extends ObjByteEntry {
        final int modCount;
        private final int index;
        final K key;
        private byte value;

        MutableEntry(int modCount,
                int index, K key, byte value) {
            this.modCount = modCount;
            this.index = index;
            this.key = key;
            this.value = value;
        }

        @Override
        public K key() {
            return key;
        }

        @Override
        public byte value() {
            return value;
        }

        @Override
        public Byte setValue(Byte newValue) {
            if (modCount != modCount())
                throw new IllegalStateException();
            byte oldValue = value;
            byte unwrappedNewValue = newValue;
            value = unwrappedNewValue;
            updateValueInTable(unwrappedNewValue);
            return oldValue;
        }

        void updateValueInTable(byte newValue) {
            values[index] = newValue;
        }
    }



    class ReusableEntry extends ObjByteEntry {
        private K key;
        private byte value;

        ReusableEntry with(K key, byte value) {
            this.key = key;
            this.value = value;
            return this;
        }

        @Override
        public K key() {
            return key;
        }

        @Override
        public byte value() {
            return value;
        }
    }


    class ValueView extends AbstractByteValueView {


        @Override
        public int size() {
            return UpdatableQHashSeparateKVObjByteMapGO.this.size();
        }

        @Override
        public boolean shrink() {
            return UpdatableQHashSeparateKVObjByteMapGO.this.shrink();
        }

        @Override
        public boolean contains(Object o) {
            return UpdatableQHashSeparateKVObjByteMapGO.this.containsValue(o);
        }

        @Override
        public boolean contains(byte v) {
            return UpdatableQHashSeparateKVObjByteMapGO.this.containsValue(v);
        }



        @Override
        public void forEach(Consumer action) {
            if (action == null)
                throw new java.lang.NullPointerException();
            if (this.isEmpty())
                return;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    action.accept(vals[i]);
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
        }

        @Override
        public void forEach(ByteConsumer action) {
            if (action == null)
                throw new java.lang.NullPointerException();
            if (this.isEmpty())
                return;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    action.accept(vals[i]);
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
        }

        @Override
        public boolean forEachWhile(BytePredicate predicate) {
            if (predicate == null)
                throw new java.lang.NullPointerException();
            if (this.isEmpty())
                return true;
            boolean terminated = false;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    if (!predicate.test(vals[i])) {
                        terminated = true;
                        break;
                    }
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            return !terminated;
        }

        @Override
        public boolean allContainingIn(ByteCollection c) {
            if (this.isEmpty())
                return true;
            boolean containsAll = true;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    if (!c.contains(vals[i])) {
                        containsAll = false;
                        break;
                    }
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            return containsAll;
        }


        @Override
        public boolean reverseAddAllTo(ByteCollection c) {
            if (this.isEmpty())
                return false;
            boolean changed = false;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    changed |= c.add(vals[i]);
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            return changed;
        }


        @Override
        public boolean reverseRemoveAllFrom(ByteSet s) {
            if (this.isEmpty() || s.isEmpty())
                return false;
            boolean changed = false;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    changed |= s.removeByte(vals[i]);
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            return changed;
        }



        @Override
        @Nonnull
        public ByteIterator iterator() {
            int mc = modCount();
            return new NoRemovedValueIterator(
                    mc);
        }

        @Nonnull
        @Override
        public ByteCursor cursor() {
            int mc = modCount();
            return new NoRemovedValueCursor(
                    mc);
        }

        @Override
        @Nonnull
        public Object[] toArray() {
            int size = size();
            Object[] result = new Object[size];
            if (size == 0)
                return result;
            int resultIndex = 0;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    result[resultIndex++] = vals[i];
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            return result;
        }

        @Override
        @SuppressWarnings("unchecked")
        @Nonnull
        public  T[] toArray(@Nonnull T[] a) {
            int size = size();
            if (a.length < size) {
                Class elementType = a.getClass().getComponentType();
                a = (T[]) java.lang.reflect.Array.newInstance(elementType, size);
            }
            if (size == 0) {
                if (a.length > 0)
                    a[0] = null;
                return a;
            }
            int resultIndex = 0;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    a[resultIndex++] = (T) Byte.valueOf(vals[i]);
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            if (a.length > resultIndex)
                a[resultIndex] = null;
            return a;
        }

        @Override
        public byte[] toByteArray() {
            int size = size();
            byte[] result = new byte[size];
            if (size == 0)
                return result;
            int resultIndex = 0;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    result[resultIndex++] = vals[i];
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            return result;
        }

        @Override
        public byte[] toArray(byte[] a) {
            int size = size();
            if (a.length < size)
                a = new byte[size];
            if (size == 0) {
                if (a.length > 0)
                    a[0] = (byte) 0;
                return a;
            }
            int resultIndex = 0;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    a[resultIndex++] = vals[i];
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            if (a.length > resultIndex)
                a[resultIndex] = (byte) 0;
            return a;
        }



        @Override
        public String toString() {
            if (this.isEmpty())
                return "[]";
            StringBuilder sb = new StringBuilder();
            int elementCount = 0;
            int mc = modCount();
            Object[] keys = set;
            byte[] vals = values;
            for (int i = keys.length - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    sb.append(' ').append(vals[i]).append(',');
                    if (++elementCount == 8) {
                        int expectedLength = sb.length() * (size() / 8);
                        sb.ensureCapacity(expectedLength + (expectedLength / 2));
                    }
                }
            }
            if (mc != modCount())
                throw new java.util.ConcurrentModificationException();
            sb.setCharAt(0, '[');
            sb.setCharAt(sb.length() - 1, ']');
            return sb.toString();
        }


        @Override
        public boolean remove(Object o) {
            return removeByte(( Byte ) o);
        }

        @Override
        public boolean removeByte(byte v) {
            return removeValue(v);
        }



        @Override
        public void clear() {
            UpdatableQHashSeparateKVObjByteMapGO.this.clear();
        }

        
        public boolean removeIf(Predicate filter) {
            throw new java.lang.UnsupportedOperationException();
        }

        @Override
        public boolean removeIf(BytePredicate filter) {
            throw new java.lang.UnsupportedOperationException();
        }

        @Override
        public boolean removeAll(@Nonnull Collection c) {
            throw new java.lang.UnsupportedOperationException();
        }


        @Override
        public boolean retainAll(@Nonnull Collection c) {
            throw new java.lang.UnsupportedOperationException();
        }

    }



    class NoRemovedEntryIterator implements ObjIterator> {
        final Object[] keys;
        final byte[] vals;
        int expectedModCount;
        int nextIndex;
        MutableEntry next;

        NoRemovedEntryIterator(int mc) {
            expectedModCount = mc;
            Object[] keys = this.keys = set;
            byte[] vals = this.vals = values;
            int nextI = keys.length;
            while (--nextI >= 0) {
                Object key;
                if ((key = keys[nextI]) != FREE) {
                    // noinspection unchecked
                    next = new MutableEntry(mc, nextI, (K) key, vals[nextI]);
                    break;
                }
            }
            nextIndex = nextI;
        }

        @Override
        public void forEachRemaining(@Nonnull Consumer> action) {
            if (action == null)
                throw new java.lang.NullPointerException();
            int mc = expectedModCount;
            Object[] keys = this.keys;
            byte[] vals = this.vals;
            int nextI = nextIndex;
            for (int i = nextI; i >= 0; i--) {
                Object key;
                if ((key = keys[i]) != FREE) {
                    // noinspection unchecked
                    action.accept(new MutableEntry(mc, i, (K) key, vals[i]));
                }
            }
            if (nextI != nextIndex || mc != modCount()) {
                throw new java.util.ConcurrentModificationException();
            }
            nextIndex = -1;
        }

        @Override
        public boolean hasNext() {
            return nextIndex >= 0;
        }

        @Override
        public Map.Entry next() {
            int mc;
            if ((mc = expectedModCount) == modCount()) {
                int nextI;
                if ((nextI = nextIndex) >= 0) {
                    Object[] keys = this.keys;
                    MutableEntry prev = next;
                    while (--nextI >= 0) {
                        Object key;
                        if ((key = keys[nextI]) != FREE) {
                            // noinspection unchecked
                            next = new MutableEntry(mc, nextI, (K) key, vals[nextI]);
                            break;
                        }
                    }
                    nextIndex = nextI;
                    return prev;
                } else {
                    throw new java.util.NoSuchElementException();
                }
            } else {
                throw new java.util.ConcurrentModificationException();
            }
        }

        @Override
        public void remove() {
            throw new java.lang.UnsupportedOperationException();
        }
    }


    class NoRemovedEntryCursor implements ObjCursor> {
        final Object[] keys;
        final byte[] vals;
        int expectedModCount;
        int index;
        Object curKey;
        byte curValue;

        NoRemovedEntryCursor(int mc) {
            expectedModCount = mc;
            this.keys = set;
            index = keys.length;
            vals = values;
            curKey = FREE;
        }

        @Override
        public void forEachForward(Consumer> action) {
            if (action == null)
                throw new java.lang.NullPointerException();
            int mc = expectedModCount;
            Object[] keys = this.keys;
            byte[] vals = this.vals;
            int index = this.index;
            for (int i = index - 1; i >= 0; i--) {
                Object key;
                if ((key = keys[i]) != FREE) {
                    // noinspection unchecked
                    action.accept(new MutableEntry(mc, i, (K) key, vals[i]));
                }
            }
            if (index != this.index || mc != modCount()) {
                throw new java.util.ConcurrentModificationException();
            }
            this.index = -1;
            curKey = FREE;
        }

        @Override
        public Map.Entry elem() {
            Object curKey;
            if ((curKey = this.curKey) != FREE) {
                // noinspection unchecked
                return new MutableEntry(expectedModCount, index, (K) curKey, curValue);
            } else {
                throw new java.lang.IllegalStateException();
            }
        }

        @Override
        public boolean moveNext() {
            if (expectedModCount == modCount()) {
                Object[] keys = this.keys;
                for (int i = index - 1; i >= 0; i--) {
                    Object key;
                    if ((key = keys[i]) != FREE) {
                        index = i;
                        curKey = key;
                        curValue = vals[i];
                        return true;
                    }
                }
                curKey = FREE;
                index = -1;
                return false;
            } else {
                throw new java.util.ConcurrentModificationException();
            }
        }

        @Override
        public void remove() {
            throw new java.lang.UnsupportedOperationException();
        }
    }




    class NoRemovedValueIterator implements ByteIterator {
        final Object[] keys;
        final byte[] vals;
        int expectedModCount;
        int nextIndex;
        byte next;

        NoRemovedValueIterator(int mc) {
            expectedModCount = mc;
            Object[] keys = this.keys = set;
            byte[] vals = this.vals = values;
            int nextI = keys.length;
            while (--nextI >= 0) {
                if (keys[nextI] != FREE) {
                    // noinspection unchecked
                    next = vals[nextI];
                    break;
                }
            }
            nextIndex = nextI;
        }

        @Override
        public byte nextByte() {
            if (expectedModCount == modCount()) {
                int nextI;
                if ((nextI = nextIndex) >= 0) {
                    Object[] keys = this.keys;
                    byte prev = next;
                    while (--nextI >= 0) {
                        if (keys[nextI] != FREE) {
                            // noinspection unchecked
                            next = vals[nextI];
                            break;
                        }
                    }
                    nextIndex = nextI;
                    return prev;
                } else {
                    throw new java.util.NoSuchElementException();
                }
            } else {
                throw new java.util.ConcurrentModificationException();
            }
        }

        @Override
        public void forEachRemaining(Consumer action) {
            if (action == null)
                throw new java.lang.NullPointerException();
            int mc = expectedModCount;
            Object[] keys = this.keys;
            byte[] vals = this.vals;
            int nextI = nextIndex;
            for (int i = nextI; i >= 0; i--) {
                if (keys[i] != FREE) {
                    // noinspection unchecked
                    action.accept(vals[i]);
                }
            }
            if (nextI != nextIndex || mc != modCount()) {
                throw new java.util.ConcurrentModificationException();
            }
            nextIndex = -1;
        }

        @Override
        public void forEachRemaining(ByteConsumer action) {
            if (action == null)
                throw new java.lang.NullPointerException();
            int mc = expectedModCount;
            Object[] keys = this.keys;
            byte[] vals = this.vals;
            int nextI = nextIndex;
            for (int i = nextI; i >= 0; i--) {
                if (keys[i] != FREE) {
                    // noinspection unchecked
                    action.accept(vals[i]);
                }
            }
            if (nextI != nextIndex || mc != modCount()) {
                throw new java.util.ConcurrentModificationException();
            }
            nextIndex = -1;
        }

        @Override
        public boolean hasNext() {
            return nextIndex >= 0;
        }

        @Override
        public Byte next() {
            return nextByte();
        }

        @Override
        public void remove() {
            throw new java.lang.UnsupportedOperationException();
        }
    }


    class NoRemovedValueCursor implements ByteCursor {
        final Object[] keys;
        final byte[] vals;
        int expectedModCount;
        int index;
        Object curKey;
        byte curValue;

        NoRemovedValueCursor(int mc) {
            expectedModCount = mc;
            this.keys = set;
            index = keys.length;
            vals = values;
            curKey = FREE;
        }

        @Override
        public void forEachForward(ByteConsumer action) {
            if (action == null)
                throw new java.lang.NullPointerException();
            int mc = expectedModCount;
            Object[] keys = this.keys;
            byte[] vals = this.vals;
            int index = this.index;
            for (int i = index - 1; i >= 0; i--) {
                if (keys[i] != FREE) {
                    // noinspection unchecked
                    action.accept(vals[i]);
                }
            }
            if (index != this.index || mc != modCount()) {
                throw new java.util.ConcurrentModificationException();
            }
            this.index = -1;
            curKey = FREE;
        }

        @Override
        public byte elem() {
            if (curKey != FREE) {
                return curValue;
            } else {
                throw new java.lang.IllegalStateException();
            }
        }

        @Override
        public boolean moveNext() {
            if (expectedModCount == modCount()) {
                Object[] keys = this.keys;
                for (int i = index - 1; i >= 0; i--) {
                    Object key;
                    if ((key = keys[i]) != FREE) {
                        index = i;
                        curKey = key;
                        curValue = vals[i];
                        return true;
                    }
                }
                curKey = FREE;
                index = -1;
                return false;
            } else {
                throw new java.util.ConcurrentModificationException();
            }
        }

        @Override
        public void remove() {
            throw new java.lang.UnsupportedOperationException();
        }
    }



    class NoRemovedMapCursor implements ObjByteCursor {
        final Object[] keys;
        final byte[] vals;
        int expectedModCount;
        int index;
        Object curKey;
        byte curValue;

        NoRemovedMapCursor(int mc) {
            expectedModCount = mc;
            this.keys = set;
            index = keys.length;
            vals = values;
            curKey = FREE;
        }

        @Override
        public void forEachForward(ObjByteConsumer action) {
            if (action == null)
                throw new java.lang.NullPointerException();
            int mc = expectedModCount;
            Object[] keys = this.keys;
            byte[] vals = this.vals;
            int index = this.index;
            for (int i = index - 1; i >= 0; i--) {
                Object key;
                if ((key = keys[i]) != FREE) {
                    // noinspection unchecked
                    action.accept((K) key, vals[i]);
                }
            }
            if (index != this.index || mc != modCount()) {
                throw new java.util.ConcurrentModificationException();
            }
            this.index = -1;
            curKey = FREE;
        }

        @Override
        public K key() {
            Object curKey;
            if ((curKey = this.curKey) != FREE) {
                // noinspection unchecked
                return (K) curKey;
            } else {
                throw new java.lang.IllegalStateException();
            }
        }

        @Override
        public byte value() {
            if (curKey != FREE) {
                return curValue;
            } else {
                throw new java.lang.IllegalStateException();
            }
        }


        @Override
        public void setValue(byte value) {
            if (curKey != FREE) {
                if (expectedModCount == modCount()) {
                    vals[index] = value;
                } else {
                    throw new java.util.ConcurrentModificationException();
                }
            } else {
                throw new java.lang.IllegalStateException();
            }
        }

        @Override
        public boolean moveNext() {
            if (expectedModCount == modCount()) {
                Object[] keys = this.keys;
                for (int i = index - 1; i >= 0; i--) {
                    Object key;
                    if ((key = keys[i]) != FREE) {
                        index = i;
                        curKey = key;
                        curValue = vals[i];
                        return true;
                    }
                }
                curKey = FREE;
                index = -1;
                return false;
            } else {
                throw new java.util.ConcurrentModificationException();
            }
        }

        @Override
        public void remove() {
            throw new java.lang.UnsupportedOperationException();
        }
    }
}




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