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POJava Enum handling
 

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    <p>I have a Java question about the best method to work with the following enum file that has been provided to me.</p> <pre><code>public enum Foo{ PLANE(1, "Plane", "plane"), CASTLE(2, "Castle", "castle"), FEILD(3, "Feild", "field"), ROAD(4, "Road", new String[] {"road", "pavement"}); } </code></pre> <p><strong>There are roughly 100ish entries of the above formats</strong></p> <pre><code>/** * Stores a map of the names for fast access. Stores a map of the IDs for fast access. */ private static final Map&lt;Integer,BlockType&gt; ids = new HashMap&lt;Integer,BlockType&gt;(); private static final Map&lt;String,BlockType&gt; lookup = new HashMap&lt;String,BlockType&gt;(); private final int id; private final String name; private final String[] lookupKeys; static { for(Foo type : EnumSet.allOf(Foo.class)) { ids.put(type.id, type); for (String key : type.lookupKeys) { lookup.put(key, type); } } } /** * Construct the type. * * @param id * @param name */ Foo(int id, String name, String lookupKey) { this.id = id; this.name = name; this.lookupKeys = new String[]{lookupKey}; } /** * Construct the type. * * @param id * @param name */ Foo(int id, String name, String[] lookupKeys) { this.id = id; this.name = name; this.lookupKeys = lookupKeys; } /** * Return type from ID. May return null. * * @param id * @return */ public static Foo fromID(int id) { return ids.get(id); } /** * Return type from name. May return null. * * @param name * @return */ public static Foo lookup(String name) { return lookup.get(name.toLowerCase()); } /** * Get block numeric ID. * * @return */ public int getID() { return id; } /** * Get user-friendly name. * * @return */ public String getName() { return name; } </code></pre> <p>So what I am trying to do with this enum is the following: A user issues a command, for example: /bounce 1</p> <p>The program recognizes bounce as a command and looks for the following argument. Since 1 follows the command it now checks that 1 is a valid id# in the enum. If it is it performs the command.</p> <p>A user issues a command for example 2 in the following form: /bounce plane. This time it checks to see if the string is a valid string name in the enum and if it is grab the id# associated with it to perform the command.</p> <p>How can I check for these criteria that either the id or one of the string id's exist and always return the id# for later usage. Any help would be appreciated.</p> <p>It should also be noted that this enum file is it's own independent class file being called from the main.</p> <p>Thanks to all who helped me get on the right track I have awarded Wolfcastle the correct answer, here was what I got to work for me but I am still open to any critiques on logic or performance flaws with my method.</p> <pre><code>String s = null; try { s = in.readLine(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } try { id = Integer.parseInt(s); } catch (NumberFormatException nfe) { } if (BlockType.lookup(s) != null || BlockType.fromID(id) != null) { if (BlockType.lookup(s)!= null) { blockname = BlockType.lookup(s).getName(); blockid = BlockType.lookup(s).getID(); } else { blockname = BlockType.fromID(id).getName(); blockid = BlockType.fromID(id).getID(); } } </code></pre>
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    1. COIt's not clear to me what your problem is. Your code looks like it should do what you want it to. Can you expand on the actual problem you are having?
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    2. COThis is a file that is provided to me via a collaborative team for making plugins. My package uses the enum in this file to validate that the "item" a user attempts to create actually exists in the enum either via the items id# or it's string name. If the user sends the command using string name I need to get the item id based on the string name so that the item can then be created. (hopefully this makes more sense)
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    3. COIs `BlockType` the same as `Foo`?
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      1. USPaŭlo Ebermann
 

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