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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2015 Oracle and/or its affiliates. All rights reserved.
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 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
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 * file and include the License file at packager/legal/LICENSE.txt.
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 * GPL Classpath Exception:
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package org.glassfish.grizzly.http;

import org.glassfish.grizzly.filterchain.FilterChainEvent;

/**
 * The class contains a set of standard HTTP events sent on FilterChain during
 * HTTP packets processing.
 * 
 * @author Alexey Stashok
 */
public class HttpEvents {
    public static IncomingHttpUpgradeEvent createIncomingUpgradeEvent(
            final HttpHeader httpHeader) {
        return new IncomingHttpUpgradeEvent(httpHeader);
    }
    
    public static OutgoingHttpUpgradeEvent createOutgoingUpgradeEvent(
            final HttpHeader httpHeader) {
        return new OutgoingHttpUpgradeEvent(httpHeader);
    }

    public static ChangePacketInProgressEvent createChangePacketInProgressEvent(
            final HttpHeader packet) {
        return new ChangePacketInProgressEvent(packet);
    }
    
    public static final class ChangePacketInProgressEvent implements FilterChainEvent {
        public static final Object TYPE = ChangePacketInProgressEvent.class.getName();
        
        private final HttpHeader httpHeader;

        private ChangePacketInProgressEvent(HttpHeader httpHeader) {
            this.httpHeader = httpHeader;
        }
        
        public HttpHeader getPacket() {
            return httpHeader;
        }

        @Override
        public Object type() {
            return TYPE;
        }
    }

    public static final class ResponseCompleteEvent implements FilterChainEvent {
        public static final Object TYPE = ResponseCompleteEvent.class.getName();
        
        @Override
        public Object type() {
            return TYPE;
        }
        
    }
    
    public static final class IncomingHttpUpgradeEvent extends HttpUpgradeEvent {
        public static final Object TYPE = IncomingHttpUpgradeEvent.class.getName();

        private IncomingHttpUpgradeEvent(final HttpHeader httpHeader) {
            super(httpHeader);
        }
        
        @Override
        public Object type() {
            return TYPE;
        }
    }
    
    public static final class OutgoingHttpUpgradeEvent extends HttpUpgradeEvent {
        public static final Object TYPE = OutgoingHttpUpgradeEvent.class.getName();

        private OutgoingHttpUpgradeEvent(final HttpHeader httpHeader) {
            super(httpHeader);
        }
        
        @Override
        public Object type() {
            return TYPE;
        }
    }

    private static abstract class HttpUpgradeEvent implements FilterChainEvent {
        private final HttpHeader httpHeader;
        
        private HttpUpgradeEvent(final HttpHeader httpHeader) {
            this.httpHeader = httpHeader;
        }

        public HttpHeader getHttpHeader() {
            return httpHeader;
        }
    }
}