ReadOnlyByteBufferBuf.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.buffer;

import io.netty.util.internal.StringUtil;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.ReadOnlyBufferException;
import java.nio.channels.FileChannel;
import java.nio.channels.GatheringByteChannel;
import java.nio.channels.ScatteringByteChannel;


/**
 * Read-only ByteBuf which wraps a read-only ByteBuffer.
 */
class ReadOnlyByteBufferBuf extends AbstractReferenceCountedByteBuf {

    protected final ByteBuffer buffer;
    private final ByteBufAllocator allocator;
    private ByteBuffer tmpNioBuf;

    ReadOnlyByteBufferBuf(ByteBufAllocator allocator, ByteBuffer buffer) {
        super(buffer.remaining());
        if (!buffer.isReadOnly()) {
            throw new IllegalArgumentException("must be a readonly buffer: " + StringUtil.simpleClassName(buffer));
        }

        this.allocator = allocator;
        this.buffer = buffer.slice().order(ByteOrder.BIG_ENDIAN);
        writerIndex(this.buffer.limit());
    }

    @Override
    protected void deallocate() { }

    @Override
    public boolean isWritable() {
        return false;
    }

    @Override
    public boolean isWritable(int numBytes) {
// ... (594 more lines)