/* Copyright © 2013 Matthew Champion

 All rights reserved.

 Redistribution and use in source and binary forms, with or without

 modification, are permitted provided that the following conditions are met:

     * Redistributions of source code must retain the above copyright

       notice, this list of conditions and the following disclaimer.

     * Redistributions in binary form must reproduce the above copyright

       notice, this list of conditions and the following disclaimer in the

       documentation and/or other materials provided with the distribution.

     * Neither the name of mattunderscore.com nor the

       names of its contributors may be used to endorse or promote products

       derived from this software without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 DISCLAIMED. IN NO EVENT SHALL MATTHEW CHAMPION BE LIABLE FOR ANY

 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */

 package com.mattunderscore.http.headers.useragent.parser;

 import static com.mattunderscore.http.headers.useragent.parser.ParsingUtils.nextElement;

 import com.mattunderscore.http.headers.useragent.details.hardware.Architecture;

 /**

  * Parser for architecture.

  * @author Matt Champion

  * @since 0.2.7

  */

 /*package*/ class ArchitectureParser implements TokenParser

 {

     /*package*/ ArchitectureParser()

     {

     }

     @Override

     public String parseToken(final ParsingState state)

     {

         if (!state.hasArchitecture()) {

             String remaining = state.getRemaining();

             String arch = nextElement(remaining);

             if ("x86_64".equals(arch))

             {

                 setArchitecture(state,arch);

                 state.addDetail(new Architecture(arch));

                 remaining = remaining.substring(6);

                 state.setArchitecture();

                 state.setRemaining(remaining);

                 return arch;

             }

             else if ("i686".equals(arch))

             {

                 setArchitecture(state,arch);

                 state.addDetail(new Architecture(arch));

                 remaining = remaining.substring(4);

                 state.setArchitecture();

                 state.setRemaining(remaining);

                 return arch;

             }

             else if ("x86".equals(arch))

             {

                 setArchitecture(state,arch);

                 state.addDetail(new Architecture(arch));

                 remaining = remaining.substring(3);

                 state.setArchitecture();

                 state.setRemaining(remaining);

                 return arch;

             }

             else if ("x64".equals(arch))

             {

                 setArchitecture(state,arch);

                 remaining = remaining.substring(3);

                 state.setRemaining(remaining);

                 return arch;

             }

         }

         return null;

     }

     /**

      * Set the architecture if has not already been set.

      * @param state The current state

      * @param arch The string token indicating the architecture

      */

     public void setArchitecture(final ParsingState state, final String arch)

     {

         if (!state.hasArchitecture())

         {

             state.addDetail(new Architecture(arch));

             state.setArchitecture();

         }

     }

 }