modules/cldc-compact/src/main/java/cc/squirreljme/jvm/suite/EntryPoints.java

   1 // -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
   2 // ---------------------------------------------------------------------------
   3 // SquirrelJME
   4 //     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
   5 // ---------------------------------------------------------------------------
   6 // SquirrelJME is under the Mozilla Public License Version 2.0.
   7 // See license.mkd for licensing and copyright information.
   8 // ---------------------------------------------------------------------------
   9
  10 package cc.squirreljme.jvm.suite;
  11
  12 import cc.squirreljme.jvm.manifest.JavaManifest;
  13 import cc.squirreljme.jvm.manifest.JavaManifestAttributes;
  14 import cc.squirreljme.jvm.manifest.JavaManifestKey;
  15 import java.util.AbstractList;
  16 import java.util.ArrayList;
  17 import java.util.List;
  18
  19 /**
  20  * This parses the entry points which are available for usage.
  21  *
  22  * @since 2017/08/20
  23  */
  24 public class EntryPoints
  25         extends AbstractList<EntryPoint>
  26 {
  27         /** Available entry points. */
  28         private final EntryPoint[] _entrypoints;
  29
  30         /**
  31          * Initializes the entry points the hosted launcher can find.
  32          *
  33          * @param __man The manifest to parse.
  34          * @throws NullPointerException On null arguments.
  35          * @since 2018/03/24
  36          */
  37         public EntryPoints(JavaManifest __man)
  38                 throws NullPointerException
  39         {
  40                 this(__man.getMainAttributes());
  41         }
  42
  43         /**
  44          * Initializes the entry points the hosted launcher can find.
  45          *
  46          * @param __attr The attributes to parse.
  47          * @throws NullPointerException On null arguments.
  48          * @since 2017/08/20
  49          */
  50         public EntryPoints(JavaManifestAttributes __attr)
  51                 throws NullPointerException
  52         {
  53                 // Check
  54                 if (__attr == null)
  55                         throw new NullPointerException("NARG");
  56
  57                 // Target list
  58                 List<EntryPoint> target = new ArrayList<>();
  59
  60                 // Parse main class first
  61                 String oldClass = __attr.get(new JavaManifestKey("Main-Class"));
  62                 if (oldClass != null)
  63                         target.add(new EntryPoint("Command Line", oldClass,
  64                                 null, false));
  65
  66                 // Parse MIDlet identifiers next
  67                 for (int i = 1; i >= 1; i++)
  68                 {
  69                         // These are always in sequence
  70                         String midletval = __attr.get(new JavaManifestKey(
  71                                 String.format("MIDlet-%d", i)));
  72                         if (midletval == null)
  73                                 break;
  74
  75                         // The MIDlet field is in 3 fields: name, icon, class
  76                         /* {@squirreljme.error DG03 Expected two commas in the MIDlet
  77                         field.} */
  78                         int pc = midletval.indexOf(','),
  79                                 sc = midletval.indexOf(',', Math.max(pc + 1, 0));
  80                         if (pc < 0 || sc < 0)
  81                                 throw new RuntimeException("DG03");
  82
  83                         // Split fields
  84                         String iconRc = midletval.substring(pc + 1, sc).trim();
  85                         target.add(new EntryPoint(midletval.substring(0, pc).trim(),
  86                                 midletval.substring(sc + 1).trim(),
  87                                 (iconRc.isEmpty() ? null : iconRc), true));
  88                 }
  89
  90                 // Finalize
  91                 this._entrypoints = target.<EntryPoint>toArray(
  92                         new EntryPoint[target.size()]);
  93         }
  94
  95         /**
  96          * {@inheritDoc}
  97          * @since 2017/08/20
  98          */
  99         @Override
 100         public EntryPoint get(int __i)
 101         {
 102                 return this._entrypoints[__i];
 103         }
 104
 105         /**
 106          * {@inheritDoc}
 107          * @since 2017/08/20
 108          */
 109         @Override
 110         public int size()
 111         {
 112                 return this._entrypoints.length;
 113         }
 114 }
 115