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Java > Open Source Codes > edu > rice > cs > drjava > model > compiler > JavacFromSetLocation


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33
34 package edu.rice.cs.drjava.model.compiler;
35
36 import java.io.File JavaDoc;
37 import java.net.URLClassLoader JavaDoc;
38 import java.net.URL JavaDoc;
39 import java.net.MalformedURLException JavaDoc;
40
41 import edu.rice.cs.drjava.DrJava;
42 import edu.rice.cs.drjava.config.OptionConstants;
43 import edu.rice.cs.drjava.config.FileOption;
44
45 import edu.rice.cs.util.FileOps;
46
47 /**
48  * A compiler interface to find Javac from the location
49  * specified in Configuration.
50  *
51  * @version $Id: JavacFromSetLocation.java 3984 2006-08-31 18:56:29Z rcartwright $
52  */
53 public class JavacFromSetLocation extends CompilerProxy
54     implements OptionConstants {
55     // To implement #523222, we had to make this not a singleton,
56 // to allow it to re-determine the location of the compiler multiple times.
57 //public static final CompilerInterface ONLY = new JavacFromSetLocation();
58
59     /** Private constructor due to singleton. */
60     public JavacFromSetLocation() {
61         super("edu.rice.cs.drjava.model.compiler.JavacGJCompiler", _getClassLoader());
62     }
63
64     private static ClassLoader JavaDoc _getClassLoader() {
65         File JavaDoc loc = DrJava.getConfig().getSetting(JAVAC_LOCATION);
66         if (loc == FileOption.NULL_FILE) {
67             throw new RuntimeException JavaDoc("javac location not set");
68         }
69
70         try {
71             URL JavaDoc url = FileOps.toURL(loc);
72             return new URLClassLoader JavaDoc(new URL JavaDoc[] { url });
73         }
74         catch (MalformedURLException JavaDoc e) {
75             throw new RuntimeException JavaDoc("malformed url exception");
76         }
77     }
78
79     /**
80      * Returns the name of this compiler, appropriate to show to the user.
81      */
82     public String JavaDoc getName() {
83         return super.getName() + " (user)";
84     }
85 }
86
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