| 1 | package dolda.jglob; |
| 2 | |
| 3 | import java.util.*; |
| 4 | import java.io.*; |
| 5 | import java.nio.file.*; |
| 6 | import javax.annotation.processing.*; |
| 7 | import javax.tools.*; |
| 8 | import javax.lang.model.*; |
| 9 | import javax.lang.model.element.*; |
| 10 | import javax.lang.model.util.*; |
| 11 | |
| 12 | @SupportedAnnotationTypes({"*"}) |
| 13 | public class Collector extends AbstractProcessor { |
| 14 | private ProcessingEnvironment cfg; |
| 15 | private Elements eu; |
| 16 | private boolean verbose = false; |
| 17 | |
| 18 | public void init(ProcessingEnvironment cfg) { |
| 19 | this.cfg = cfg; |
| 20 | eu = cfg.getElementUtils(); |
| 21 | } |
| 22 | |
| 23 | private String tn(TypeElement el) { |
| 24 | return(eu.getBinaryName(el).toString()); |
| 25 | } |
| 26 | |
| 27 | private Set<String> getprev(TypeElement annotation) { |
| 28 | Set<String> prev = new HashSet<String>(); |
| 29 | try { |
| 30 | FileObject lf = cfg.getFiler().getResource(StandardLocation.CLASS_OUTPUT, "", "META-INF/glob/" + tn(annotation)); |
| 31 | InputStream in; |
| 32 | try { |
| 33 | in = lf.openInputStream(); |
| 34 | } catch(FileNotFoundException | NoSuchFileException e) { |
| 35 | return(prev); |
| 36 | } |
| 37 | try { |
| 38 | BufferedReader r = new BufferedReader(new InputStreamReader(in, "utf-8")); |
| 39 | String ln; |
| 40 | while((ln = r.readLine()) != null) |
| 41 | prev.add(ln); |
| 42 | return(prev); |
| 43 | } finally { |
| 44 | in.close(); |
| 45 | } |
| 46 | } catch(IOException e) { |
| 47 | cfg.getMessager().printMessage(Diagnostic.Kind.ERROR, "could not read previous globlist for " + tn(annotation) + ": " + e); |
| 48 | return(Collections.emptySet()); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | private void writenew(TypeElement annotation, Collection<String> names) { |
| 53 | try { |
| 54 | FileObject lf = cfg.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "", "META-INF/glob/" + tn(annotation)); |
| 55 | OutputStream out = lf.openOutputStream(); |
| 56 | try { |
| 57 | Writer w = new BufferedWriter(new OutputStreamWriter(out, "utf-8")); |
| 58 | for(String nm : names) |
| 59 | w.write(nm + "\n"); |
| 60 | w.flush(); |
| 61 | } finally { |
| 62 | out.close(); |
| 63 | } |
| 64 | } catch(IOException e) { |
| 65 | cfg.getMessager().printMessage(Diagnostic.Kind.ERROR, "could not write new globlist for " + tn(annotation) + ": " + e); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | private void process(TypeElement annotation, RoundEnvironment round, TypeMap types) { |
| 70 | Set<String> prev = getprev(annotation); |
| 71 | Set<String> carry = new HashSet<String>(prev); |
| 72 | Set<String> found = new HashSet<String>(); |
| 73 | for(Element e : round.getElementsAnnotatedWith(annotation)) { |
| 74 | if(!(e instanceof TypeElement)) { |
| 75 | cfg.getMessager().printMessage(Diagnostic.Kind.ERROR, tn(annotation) + " must annotate types", e); |
| 76 | continue; |
| 77 | } |
| 78 | TypeElement type = (TypeElement)e; |
| 79 | String nm = tn(type); |
| 80 | if(!prev.contains(nm) && verbose) |
| 81 | cfg.getMessager().printMessage(Diagnostic.Kind.NOTE, "added " + nm, type); |
| 82 | found.add(nm); |
| 83 | carry.remove(nm); |
| 84 | } |
| 85 | for(Iterator<String> i = carry.iterator(); i.hasNext();) { |
| 86 | String nm = i.next(); |
| 87 | TypeElement el = types.get(nm); |
| 88 | if(el != null) { |
| 89 | i.remove(); |
| 90 | if(verbose) |
| 91 | cfg.getMessager().printMessage(Diagnostic.Kind.NOTE, "removed " + nm, el); |
| 92 | } |
| 93 | } |
| 94 | List<String> all = new ArrayList<String>(); |
| 95 | all.addAll(carry); |
| 96 | all.addAll(found); |
| 97 | Collections.sort(all); |
| 98 | writenew(annotation, all); |
| 99 | } |
| 100 | |
| 101 | public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment round) { |
| 102 | for(TypeElement a : annotations) { |
| 103 | if(a.getAnnotation(Discoverable.class) != null) |
| 104 | process(a, round, new TypeMap(round.getRootElements(), eu)); |
| 105 | } |
| 106 | return(false); |
| 107 | } |
| 108 | |
| 109 | public SourceVersion getSupportedSourceVersion() { |
| 110 | return(SourceVersion.latest()); |
| 111 | } |
| 112 | } |