src/java.net.http/share/classes/jdk/internal/net/http/frame/Http2Frame.java
author chegar
Wed, 07 Feb 2018 21:45:37 +0000
branchhttp-client-branch
changeset 56092 fd85b2bf2b0d
parent 56089 src/java.net.http/share/classes/java/net/http/internal/frame/Http2Frame.java@42208b2f224e
child 56451 9585061fdb04
permissions -rw-r--r--
http-client-branch: move implementation to jdk.internal.net.http
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/*
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 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package jdk.internal.net.http.frame;
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/**
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 * When sending a frame, the length field must be set in sub-class
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 * by calling computeLength()
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 */
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public abstract class Http2Frame {
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    public static final int FRAME_HEADER_SIZE = 9;
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    protected int streamid;
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    protected int flags;
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    public Http2Frame(int streamid, int flags) {
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        this.streamid = streamid;
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        this.flags = flags;
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    }
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    public int streamid() {
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        return streamid;
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    }
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    public void setFlag(int flag) {
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        flags |= flag;
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    }
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    public int getFlags() {
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        return flags;
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    }
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    public boolean getFlag(int flag) {
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        return (flags & flag) != 0;
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    }
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//    public void clearFlag(int flag) {
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//        flags &= 0xffffffff ^ flag;
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//    }
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    public void streamid(int streamid) {
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        this.streamid = streamid;
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    }
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    private String typeAsString() {
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        return asString(type());
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    }
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    public int type() {
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        return -1; // Unknown type
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    }
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    int length() {
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        return -1; // Unknown length
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    }
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    public static String asString(int type) {
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        switch (type) {
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          case DataFrame.TYPE:
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            return "DATA";
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          case HeadersFrame.TYPE:
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            return "HEADERS";
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          case ContinuationFrame.TYPE:
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            return "CONTINUATION";
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          case ResetFrame.TYPE:
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            return "RESET";
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          case PriorityFrame.TYPE:
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            return "PRIORITY";
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          case SettingsFrame.TYPE:
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            return "SETTINGS";
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          case GoAwayFrame.TYPE:
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            return "GOAWAY";
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          case PingFrame.TYPE:
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            return "PING";
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          case PushPromiseFrame.TYPE:
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            return "PUSH_PROMISE";
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          case WindowUpdateFrame.TYPE:
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            return "WINDOW_UPDATE";
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          default:
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            return "UNKNOWN";
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        }
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    }
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    @Override
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    public String toString() {
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        StringBuilder sb = new StringBuilder();
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        sb.append(typeAsString())
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                .append(": length=")
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                .append(Integer.toString(length()))
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                .append(", streamid=")
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                .append(streamid)
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                .append(", flags=");
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        int f = flags;
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        int i = 0;
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        if (f == 0) {
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            sb.append("0 ");
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        } else {
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            while (f != 0) {
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                if ((f & 1) == 1) {
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                    sb.append(flagAsString(1 << i))
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                      .append(' ');
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                }
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                f = f >> 1;
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                i++;
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            }
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        }
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        return sb.toString();
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    }
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    // Override
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    public String flagAsString(int f) {
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        return "unknown";
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    }
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}