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 GNU General Public License v3+, or later.
   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 cc.squirreljme.runtime.cldc.annotation.Exported;
  16 import java.util.AbstractList;
  17 import java.util.ArrayList;
  18 import java.util.List;
  19
  20 /**
  21  * This parses the entry points which are available for usage.
  22  *
  23  * @since 2017/08/20
  24  */
  25 @Exported
  26 public class EntryPoints
  27         extends AbstractList<EntryPoint>
  28 {
  29         /** Available entry points. */
  30         private final EntryPoint[] _entrypoints;
  31
  32         /**
  33          * Initializes the entry points the hosted launcher can find.
  34          *
  35          * @param __man The manifest to parse.
  36          * @throws NullPointerException On null arguments.
  37          * @since 2018/03/24
  38          */
  39         @Exported
  40         public EntryPoints(JavaManifest __man)
  41                 throws NullPointerException
  42         {
  43                 this(__man.getMainAttributes());
  44         }
  45
  46         /**
  47          * Initializes the entry points the hosted launcher can find.
  48          *
  49          * @param __attr The attributes to parse.
  50          * @throws NullPointerException On null arguments.
  51          * @since 2017/08/20
  52          */
  53         @Exported
  54         public EntryPoints(JavaManifestAttributes __attr)
  55                 throws NullPointerException
  56         {
  57                 // Check
  58                 if (__attr == null)
  59                         throw new NullPointerException("NARG");
  60
  61                 // Target list
  62                 List<EntryPoint> target = new ArrayList<>();
  63
  64                 // Parse main class first
  65                 String oldClass = __attr.get(new JavaManifestKey("Main-Class"));
  66                 if (oldClass != null)
  67                         target.add(new EntryPoint("Command Line", oldClass,
  68                                 null, false));
  69
  70                 // Parse MIDlet identifiers next
  71                 for (int i = 1; i >= 1; i++)
  72                 {
  73                         // These are always in sequence
  74                         String midletval = __attr.get(new JavaManifestKey(
  75                                 String.format("MIDlet-%d", i)));
  76                         if (midletval == null)
  77                                 break;
  78
  79                         // The MIDlet field is in 3 fields: name, icon, class
  80                         // {@squirreljme.error DG03 Expected two commas in the MIDlet
  81                         // field.}
  82                         int pc = midletval.indexOf(','),
  83                                 sc = midletval.indexOf(',', Math.max(pc + 1, 0));
  84                         if (pc < 0 || sc < 0)
  85                                 throw new RuntimeException("DG03");
  86
  87                         // Split fields
  88                         String iconRc = midletval.substring(pc + 1, sc).trim();
  89                         target.add(new EntryPoint(midletval.substring(0, pc).trim(),
  90                                 midletval.substring(sc + 1).trim(),
  91                                 (iconRc.isEmpty() ? null : iconRc), true));
  92                 }
  93
  94                 // Finalize
  95                 this._entrypoints = target.<EntryPoint>toArray(
  96                         new EntryPoint[target.size()]);
  97         }
  98
  99         /**
 100          * {@inheritDoc}
 101          * @since 2017/08/20
 102          */
 103         @Override
 104         public EntryPoint get(int __i)
 105         {
 106                 return this._entrypoints[__i];
 107         }
 108
 109         /**
 110          * {@inheritDoc}
 111          * @since 2017/08/20
 112          */
 113         @Override
 114         public int size()
 115         {
 116                 return this._entrypoints.length;
 117         }
 118 }
 119