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Java > Open Source Codes > polyglot > main > Version


1 package polyglot.main;
2
3 /** This class encapsulates the version of the compiler. */
4 public abstract class Version {
5     /**
6      * The name of the language. Files produced by different languages
7      * are not compatible.
8      */
9     public abstract String JavaDoc name();
10
11     /**
12      * Marks major changes in the output format of the files produced by the
13      * compiler. Files produced be different major versions are considered
14      * incompatible and will not be used as source of class information.
15      */
16     public abstract int major();
17     
18     /**
19      * Indicates a change in the compiler that does not affect the output
20      * format. Source files will be prefered over class files build by
21      * compilers with different minor versions, but if no source file is
22      * available, then the class file will be used.
23      */
24     public abstract int minor();
25
26     /**
27      * Denote minor changes and bugfixes to the compiler. Class files compiled
28      * with versions of the compiler that only differ in patchlevel (from the
29      * current instantiation) will always be preferred over source files
30      * (unless the source files have newer modification dates).
31      */
32     public abstract int patch_level();
33
34     public String JavaDoc toString() {
35     return "" + major() + "." + minor() + "." + patch_level();
36     }
37 }
38
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