net.dv8tion.jda.bot.utils.cache.impl.ShardCacheViewImpl.java Source code

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Here is the source code for net.dv8tion.jda.bot.utils.cache.impl.ShardCacheViewImpl.java

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/*
 *     Copyright 2015-2018 Austin Keener & Michael Ritter & Florian Spie
 *
 * 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 net.dv8tion.jda.bot.utils.cache.impl;

import gnu.trove.impl.sync.TSynchronizedIntObjectMap;
import gnu.trove.map.TIntObjectMap;
import gnu.trove.map.hash.TIntObjectHashMap;
import net.dv8tion.jda.bot.utils.cache.ShardCacheView;
import net.dv8tion.jda.core.JDA;
import net.dv8tion.jda.core.utils.Checks;
import net.dv8tion.jda.core.utils.cache.CacheView;
import org.apache.commons.collections4.iterators.ObjectArrayIterator;

import javax.annotation.Nonnull;
import java.util.*;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;

public class ShardCacheViewImpl implements ShardCacheView {
    protected static final JDA[] EMPTY_ARRAY = new JDA[0];
    protected final TIntObjectMap<JDA> elements;

    public ShardCacheViewImpl() {
        this.elements = new TSynchronizedIntObjectMap<>(new TIntObjectHashMap<>(), new Object());
    }

    public ShardCacheViewImpl(int initialCapacity) {
        this.elements = new TSynchronizedIntObjectMap<>(new TIntObjectHashMap<>(initialCapacity), new Object());
    }

    public void clear() {
        elements.clear();
    }

    public TIntObjectMap<JDA> getMap() {
        return elements;
    }

    @Override
    public List<JDA> asList() {
        return Collections.unmodifiableList(new ArrayList<>(elements.valueCollection()));
    }

    @Override
    public Set<JDA> asSet() {
        return Collections.unmodifiableSet(new HashSet<>(elements.valueCollection()));
    }

    @Override
    public long size() {
        return elements.size();
    }

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

    @Override
    public List<JDA> getElementsByName(String name, boolean ignoreCase) {
        Checks.notEmpty(name, "Name");
        if (elements.isEmpty())
            return Collections.emptyList();

        List<JDA> list = new LinkedList<>();
        for (JDA elem : elements.valueCollection()) {
            String elementName = elem.getShardInfo().getShardString();
            if (elementName != null) {
                if (ignoreCase) {
                    if (elementName.equalsIgnoreCase(name))
                        list.add(elem);
                } else {
                    if (elementName.equals(name))
                        list.add(elem);
                }
            }
        }

        return list;
    }

    @Override
    public Stream<JDA> stream() {
        return StreamSupport.stream(spliterator(), false);
    }

    @Override
    public Stream<JDA> parallelStream() {
        return StreamSupport.stream(spliterator(), true);
    }

    @Nonnull
    @Override
    public Iterator<JDA> iterator() {
        JDA[] arr = elements.values(EMPTY_ARRAY);
        return new ObjectArrayIterator<>(arr);
    }

    @Override
    public JDA getElementById(int id) {
        return this.elements.get(id);
    }

    public static class UnifiedShardCacheViewImpl implements ShardCacheView {
        protected final Supplier<Stream<ShardCacheView>> generator;

        public UnifiedShardCacheViewImpl(Supplier<Stream<ShardCacheView>> generator) {
            this.generator = generator;
        }

        @Override
        public long size() {
            return distinctStream().mapToLong(CacheView::size).sum();
        }

        @Override
        public boolean isEmpty() {
            return generator.get().allMatch(CacheView::isEmpty);
        }

        @Override
        public List<JDA> asList() {
            List<JDA> list = new ArrayList<>();
            stream().forEach(list::add);
            return Collections.unmodifiableList(list);
        }

        @Override
        public Set<JDA> asSet() {
            Set<JDA> set = new HashSet<>();
            generator.get().flatMap(CacheView::stream).forEach(set::add);
            return Collections.unmodifiableSet(set);
        }

        @Override
        public List<JDA> getElementsByName(String name, boolean ignoreCase) {
            return Collections.unmodifiableList(
                    distinctStream().flatMap(view -> view.getElementsByName(name, ignoreCase).stream())
                            .collect(Collectors.toList()));
        }

        @Override
        public JDA getElementById(int id) {
            return generator.get().map(view -> view.getElementById(id)).filter(Objects::nonNull).findFirst()
                    .orElse(null);
        }

        @Override
        public Stream<JDA> stream() {
            return generator.get().flatMap(CacheView::stream).distinct();
        }

        @Override
        public Stream<JDA> parallelStream() {
            return generator.get().flatMap(CacheView::parallelStream).distinct();
        }

        @Nonnull
        @Override
        public Iterator<JDA> iterator() {
            return stream().iterator();
        }

        protected Stream<ShardCacheView> distinctStream() {
            return generator.get().distinct();
        }
    }
}