io.netty.handler.codec.spdy.DefaultSpdyDataFrame Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * 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:
 *
 *   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 io.netty.handler.codec.spdy;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.util.IllegalReferenceCountException;
import io.netty.util.internal.StringUtil;

/**
 * The default {@link SpdyDataFrame} implementation.
 */
public class DefaultSpdyDataFrame extends DefaultSpdyStreamFrame implements SpdyDataFrame {

    private final ByteBuf data;

    /**
     * Creates a new instance.
     *
     * @param streamId the Stream-ID of this frame
     */
    public DefaultSpdyDataFrame(int streamId) {
        this(streamId, Unpooled.buffer(0));
    }

    /**
     * Creates a new instance.
     *
     * @param streamId  the Stream-ID of this frame
     * @param data      the payload of the frame. Can not exceed {@link SpdyCodecUtil#SPDY_MAX_LENGTH}
     */
    public DefaultSpdyDataFrame(int streamId, ByteBuf data) {
        super(streamId);
        if (data == null) {
            throw new NullPointerException("data");
        }
        this.data = validate(data);
    }

    private static ByteBuf validate(ByteBuf data) {
        if (data.readableBytes() > SpdyCodecUtil.SPDY_MAX_LENGTH) {
            throw new IllegalArgumentException("data payload cannot exceed "
                    + SpdyCodecUtil.SPDY_MAX_LENGTH + " bytes");
        }
        return data;
    }

    @Override
    public SpdyDataFrame setStreamId(int streamId) {
        super.setStreamId(streamId);
        return this;
    }

    @Override
    public SpdyDataFrame setLast(boolean last) {
        super.setLast(last);
        return this;
    }

    @Override
    public ByteBuf content() {
        if (data.refCnt() <= 0) {
            throw new IllegalReferenceCountException(data.refCnt());
        }
        return data;
    }

    @Override
    public SpdyDataFrame copy() {
        SpdyDataFrame frame = new DefaultSpdyDataFrame(streamId(), content().copy());
        frame.setLast(isLast());
        return frame;
    }

    @Override
    public SpdyDataFrame duplicate() {
        SpdyDataFrame frame = new DefaultSpdyDataFrame(streamId(), content().duplicate());
        frame.setLast(isLast());
        return frame;
    }

    @Override
    public int refCnt() {
        return data.refCnt();
    }

    @Override
    public SpdyDataFrame retain() {
        data.retain();
        return this;
    }

    @Override
    public SpdyDataFrame retain(int increment) {
        data.retain(increment);
        return this;
    }

    @Override
    public boolean release() {
        return data.release();
    }

    @Override
    public boolean release(int decrement) {
        return data.release(decrement);
    }

    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder()
            .append(StringUtil.simpleClassName(this))
            .append("(last: ")
            .append(isLast())
            .append(')')
            .append(StringUtil.NEWLINE)
            .append("--> Stream-ID = ")
            .append(streamId())
            .append(StringUtil.NEWLINE)
            .append("--> Size = ");
        if (refCnt() == 0) {
            buf.append("(freed)");
        } else {
            buf.append(content().readableBytes());
        }
        return buf.toString();
    }
}