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