RecyclableArrayList.java — netty Source File

Source Code

/*
 * Copyright 2013 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package io.netty.util.internal;

import io.netty.util.Recycler;
import io.netty.util.internal.ObjectPool.Handle;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.RandomAccess;

/**
 * A simple list which is recyclable. This implementation does not allow {@code null} elements to be added.
 */
public final class RecyclableArrayList extends ArrayList<Object> {

    private static final long serialVersionUID = -8605125654176467947L;

    private static final int DEFAULT_INITIAL_CAPACITY = 8;

    private static final Recycler<RecyclableArrayList> RECYCLER =
            new Recycler<RecyclableArrayList>() {
                @Override
                protected RecyclableArrayList newObject(Handle<RecyclableArrayList> handle) {
                    return new RecyclableArrayList(handle);
                }
            };

    private boolean insertSinceRecycled;

    /**
     * Create a new empty {@link RecyclableArrayList} instance
     */
    public static RecyclableArrayList newInstance() {
        return newInstance(DEFAULT_INITIAL_CAPACITY);
    }

    /**
     * Create a new empty {@link RecyclableArrayList} instance with the given capacity.
     */
    public static RecyclableArrayList newInstance(int minCapacity) {
        RecyclableArrayList ret = RECYCLER.get();
        ret.ensureCapacity(minCapacity);
        return ret;
    }
// ... (91 more lines)