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/*
* Copyright (c) 2012 the original author or authors.
*
* Licensed 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 org.eclipse.jetty.spdy.api;
import java.util.HashMap;
import java.util.Map;
/**
* <p>An enumeration of stream statuses.</p>
*/
public enum StreamStatus
{
/**
* <p>The stream status indicating a protocol error</p>
*/
PROTOCOL_ERROR(1, 1),
/**
* <p>The stream status indicating that the stream is not valid</p>
*/
INVALID_STREAM(2, 2),
/**
* <p>The stream status indicating that the stream has been refused</p>
*/
REFUSED_STREAM(3, 3),
/**
* <p>The stream status indicating that the implementation does not support the SPDY version of the stream</p>
*/
UNSUPPORTED_VERSION(4, 4),
/**
* <p>The stream status indicating that the stream is no longer needed</p>
*/
CANCEL_STREAM(5, 5),
/**
* <p>The stream status indicating an implementation error</p>
*/
INTERNAL_ERROR(6, 6),
/**
* <p>The stream status indicating a flow control error</p>
*/
FLOW_CONTROL_ERROR(7, 7),
/**
* <p>The stream status indicating a stream opened more than once</p>
*/
STREAM_IN_USE(-1, 8),
/**
* <p>The stream status indicating data on a stream already closed</p>
*/
STREAM_ALREADY_CLOSED(-1, 9),
/**
* <p>The stream status indicating credentials not valid</p>
*/
INVALID_CREDENTIALS(-1, 10),
/**
* <p>The stream status indicating that the implementation could not support a frame too large</p>
*/
FRAME_TOO_LARGE(-1, 11);
/**
* @param version the SPDY protocol version
* @param code the stream status code
* @return a {@link StreamStatus} from the given version and code,
* or null if no such status exists
*/
public static StreamStatus from(short version, int code)
{
switch (version)
{
case SPDY.V2:
return Codes.v2Codes.get(code);
case SPDY.V3:
return Codes.v3Codes.get(code);
default:
throw new IllegalStateException();
}
}
private final int v2Code;
private final int v3Code;
private StreamStatus(int v2Code, int v3Code)
{
this.v2Code = v2Code;
if (v2Code >= 0)
Codes.v2Codes.put(v2Code, this);
this.v3Code = v3Code;
if (v3Code >= 0)
Codes.v3Codes.put(v3Code, this);
}
/**
* @param version the SPDY protocol version
* @return the stream status code
*/
public int getCode(short version)
{
switch (version)
{
case SPDY.V2:
return v2Code;
case SPDY.V3:
return v3Code;
default:
throw new IllegalStateException();
}
}
private static class Codes
{
private static final Map<Integer, StreamStatus> v2Codes = new HashMap<>();
private static final Map<Integer, StreamStatus> v3Codes = new HashMap<>();
}
}
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