io.micronaut.buffer.netty.NettyByteBufferFactory Maven / Gradle / Ivy

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/*
 * Copyright 2017-2020 original 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
 *
 * 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.micronaut.buffer.netty;

import io.micronaut.context.annotation.BootstrapContextCompatible;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.io.buffer.ByteBuffer;
import io.micronaut.core.io.buffer.ByteBufferFactory;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.Unpooled;
import jakarta.inject.Singleton;

import java.util.function.Supplier;

/**
 * A {@link ByteBufferFactory} implementation for Netty.
 *
 * @author Graeme Rocher
 * @since 1.0
 */
@Internal
@Singleton
@BootstrapContextCompatible
public final class NettyByteBufferFactory implements ByteBufferFactory {

    /**
     * Default Netty ByteBuffer Factory.
     */
    public static final NettyByteBufferFactory DEFAULT = new NettyByteBufferFactory();

    private final Supplier allocatorSupplier;

    /**
     * Default constructor.
     */
    public NettyByteBufferFactory() {
        this.allocatorSupplier = () -> ByteBufAllocator.DEFAULT;
    }

    /**
     * @param allocator The {@link ByteBufAllocator}
     */
    public NettyByteBufferFactory(ByteBufAllocator allocator) {
        this.allocatorSupplier = () -> allocator;
    }

    @Override
    public ByteBufAllocator getNativeAllocator() {
        return allocatorSupplier.get();
    }

    @Override
    public ByteBuffer buffer() {
        return new NettyByteBuffer(allocatorSupplier.get().buffer());
    }

    @Override
    public ByteBuffer buffer(int initialCapacity) {
        return new NettyByteBuffer(allocatorSupplier.get().buffer(initialCapacity));
    }

    @Override
    public ByteBuffer buffer(int initialCapacity, int maxCapacity) {
        return new NettyByteBuffer(allocatorSupplier.get().buffer(initialCapacity, maxCapacity));
    }

    @Override
    public ByteBuffer copiedBuffer(byte[] bytes) {
        if (bytes.length == 0) {
            return new NettyByteBuffer(Unpooled.EMPTY_BUFFER);
        }
        return new NettyByteBuffer(Unpooled.copiedBuffer(bytes));
    }

    @Override
    public ByteBuffer copiedBuffer(java.nio.ByteBuffer nioBuffer) {
        return new NettyByteBuffer(Unpooled.copiedBuffer(nioBuffer));
    }

    @Override
    public ByteBuffer wrap(ByteBuf existing) {
        return new NettyByteBuffer(existing);
    }

    @Override
    public ByteBuffer wrap(byte[] existing) {
        return new NettyByteBuffer(Unpooled.wrappedBuffer(existing));
    }
}