/*
 * Copyright 2017 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.http2;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.DefaultByteBufHolder;
import io.netty.buffer.Unpooled;
import io.netty.util.internal.StringUtil;
import io.netty.util.internal.UnstableApi;

@UnstableApi
public final class DefaultHttp2UnknownFrame extends DefaultByteBufHolder implements Http2UnknownFrame {
    private final byte frameType;
    private final Http2Flags flags;
    private Http2FrameStream stream;

    public DefaultHttp2UnknownFrame(byte frameType, Http2Flags flags) {
        this(frameType, flags, Unpooled.EMPTY_BUFFER);
    }

    public DefaultHttp2UnknownFrame(byte frameType, Http2Flags flags, ByteBuf data) {
        super(data);
        this.frameType = frameType;
        this.flags = flags;
    }

    @Override
    public Http2FrameStream stream() {
        return stream;
    }

    @Override
    public DefaultHttp2UnknownFrame stream(Http2FrameStream stream) {
        this.stream = stream;
        return this;
    }

    @Override
    public byte frameType() {
        return frameType;
    }

    @Override
    public Http2Flags flags() {
        return flags;
    }

    @Override
    public String name() {
        return "UNKNOWN";
    }

    @Override
    public DefaultHttp2UnknownFrame copy() {
        return replace(content().copy());
    }

    @Override
    public DefaultHttp2UnknownFrame duplicate() {
        return replace(content().duplicate());
    }

    @Override
    public DefaultHttp2UnknownFrame retainedDuplicate() {
        return replace(content().retainedDuplicate());
    }

    @Override
    public DefaultHttp2UnknownFrame replace(ByteBuf content) {
        return new DefaultHttp2UnknownFrame(frameType, flags, content).stream(stream());
    }

    @Override
    public DefaultHttp2UnknownFrame retain() {
        super.retain();
        return this;
    }

    @Override
    public DefaultHttp2UnknownFrame retain(int increment) {
        super.retain(increment);
        return this;
    }

    @Override
    public String toString() {
        return StringUtil.simpleClassName(this) + "(frameType=" + frameType() + ", stream=" + stream() +
                ", flags=" + flags() + ", content=" + contentToString() + ')';
    }

    @Override
    public DefaultHttp2UnknownFrame touch() {
        super.touch();
        return this;
    }

    @Override
    public DefaultHttp2UnknownFrame touch(Object hint) {
        super.touch(hint);
        return this;
    }

    @Override
    public boolean equals(Object o) {
        if (!(o instanceof DefaultHttp2UnknownFrame)) {
            return false;
        }
        DefaultHttp2UnknownFrame other = (DefaultHttp2UnknownFrame) o;
        return super.equals(other) && flags().equals(other.flags())
                && frameType() == other.frameType() && (stream() == null && other.stream() == null) ||
                stream().equals(other.stream());
    }

    @Override
    public int hashCode() {
        int hash = super.hashCode();
        hash = hash * 31 + frameType();
        hash = hash * 31 + flags().hashCode();
        if (stream() != null) {
            hash = hash * 31 + stream().hashCode();
        }

        return hash;
    }
}

@@ -2368,26 +2368,24 @@
 tream(stream
-()
 );%0A    %7D%0A%0A  
@@ -2750,18 +2750,16 @@
 rameType
-()
  + %22, st
@@ -2777,14 +2777,11 @@
 ream
-()
  +%0A
- 
     
@@ -2809,18 +2809,16 @@
  + flags
-()
  + %22, co
@@ -3323,34 +3323,161 @@
     
-return super.equals(other)
+Http2FrameStream otherStream = other.stream();%0A        return (stream == otherStream %7C%7C otherStream != null && otherStream.equals(stream))%0A              
  && 
@@ -3481,18 +3481,16 @@
 && flags
-()
 .equals(
@@ -3504,17 +3504,16 @@
 lags())%0A
- 
         
@@ -3531,18 +3531,16 @@
 rameType
-()
  == othe
@@ -3556,59 +3556,8 @@
 pe()
- && (stream() == null && other.stream() == null) %7C%7C
 %0A   
@@ -3568,25 +3568,24 @@
         
- stream()
+&& super
 .equals(
@@ -3589,25 +3589,16 @@
 ls(other
-.stream()
 );%0A    %7D
@@ -3714,18 +3714,16 @@
 rameType
-()
 ;%0A      
@@ -3748,18 +3748,16 @@
  + flags
-()
 .hashCod
@@ -3779,18 +3779,16 @@
  (stream
-()
  != null
@@ -3828,18 +3828,16 @@
 + stream
-()
 .hashCod

Fix possible NPE in DefaultHttp2UnknownFrame#equals (#9625)