ninja.leaping.configurate.util.MapFactories Maven / Gradle / Ivy

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/**
 * Configurate
 * Copyright (C) zml and Configurate contributors
 *
 * 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 ninja.leaping.configurate.util;

import com.google.common.base.Objects;
import com.google.common.base.Supplier;
import com.google.common.collect.ImmutableSet;
import ninja.leaping.configurate.ConfigurationNode;

import java.util.Collection;
import java.util.Comparator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentSkipListMap;

/**
 * Factories to create map implementations commonly used for maps
 */
public class MapFactories {
    private MapFactories() {
        // Nope
    }

    private static class SynchronizedWrapper implements ConcurrentMap {
        private final Map wrapped;

        private SynchronizedWrapper(Map wrapped) {
            this.wrapped = wrapped;
        }

        @Override
        public V putIfAbsent(K k, V v) {
            synchronized (wrapped) {
                if (!wrapped.containsKey(k)) {
                    wrapped.put(k, v);
                } else {
                    return wrapped.get(k);
                }
            }
            return null;
        }

        @Override
        public boolean remove(Object key, Object expected) {
            synchronized (wrapped) {
                if (Objects.equal(expected, wrapped.get(key))) {
                    return wrapped.remove(key) != null;
                }
            }
            return false;
        }

        @Override
        public boolean replace(K key, V old, V replace) {
            synchronized (wrapped) {
                if (Objects.equal(old, wrapped.get(key))) {
                    wrapped.put(key, replace);
                    return true;
                }
            }
            return false;
        }

        @Override
        public V replace(K k, V v) {
            synchronized (wrapped) {
                if (wrapped.containsKey(k)) {
                    return wrapped.put(k, v);
                }
            }
            return null;
        }

        @Override
        public int size() {
            synchronized (wrapped) {
                return wrapped.size();
            }
        }

        @Override
        public boolean isEmpty() {
            synchronized (wrapped) {
                return wrapped.isEmpty();
            }
        }

        @Override
        public boolean containsKey(Object o) {
            synchronized (wrapped) {
                return wrapped.containsKey(o);
            }
        }

        @Override
        public boolean containsValue(Object o) {
            synchronized (wrapped) {
                return wrapped.containsKey(o);
            }
        }

        @Override
        public V get(Object o) {
            synchronized (wrapped) {
                return wrapped.get(o);
            }
        }

        @Override
        public V put(K k, V v) {
            synchronized (wrapped) {
                return wrapped.put(k, v);
            }
        }

        @Override
        public V remove(Object o) {
            synchronized (wrapped) {
                return wrapped.remove(o);
            }
        }

        @Override
        public void putAll(Map map) {
            synchronized (wrapped) {
                wrapped.putAll(map);
            }
        }

        @Override
        public void clear() {
            synchronized (wrapped) {
                wrapped.clear();
            }
        }

        @Override
        public Set keySet() {
            synchronized (wrapped) {
                return ImmutableSet.copyOf(wrapped.keySet());
            }
        }

        @Override
        public Collection values() {
            synchronized (wrapped) {
                return ImmutableSet.copyOf(wrapped.values());
            }
        }

        @Override
        public Set> entrySet() {
            synchronized (wrapped) {
                return ImmutableSet.copyOf(wrapped.entrySet());
            }
        }
    }

    public static  Supplier> unordered() {
        return new EqualsSupplier>() {
            @Override
            public ConcurrentMap get() {
                return new ConcurrentHashMap<>();
            }
        };
    }

    public static  Supplier> sorted(final Comparator