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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
** **
** $Id$
\* */
package scalac.symtab.classfile;
import ch.epfl.lamp.util.*;
import scalac.*;
import scalac.symtab.*;
import scalac.util.*;
import java.io.*;
import java.util.HashMap;
public class PackageParser extends Type.LazyType {
/** the global compilation environment
*/
protected Global global;
/** the class parser
*/
public ClassParser classCompletion;
public SymblParser symblCompletion; // provisional
public PackageParser(Global global) {
this.global = global;
this.classCompletion = new ClassParser(global);
this.symblCompletion = new SymblParser(global); // provisional
if (global.reporter.verbose)
System.out.println("classpath = " + global.classPath);//debug
}
/** complete package type symbol p by loading all package members
*/
public void complete(Symbol p) {
long msec = System.currentTimeMillis();
Scope members = new Scope();
String dirname = null;
HashMap/*<Symbol, AbstractFile>*/ symFile = new HashMap();
if (!p.isRoot()) {
dirname = SourceRepresentation.externalizeFileName(p.fullName());
if (!dirname.endsWith("/"))
dirname += "/";
}
String[] base = global.classPath.components();
for (int i = 0; i < base.length; i++) {
includeMembers(
AbstractFile.open(base[i], dirname),
p, members, symFile);
}
p.setInfo(Type.compoundType(Type.EMPTY_ARRAY, members, p));
if (dirname == null)
dirname = "anonymous package";
global.operation("scanned " + dirname + " in " +
(System.currentTimeMillis() - msec) + "ms");
}
private boolean isMostRecent(AbstractFile f, Symbol previous, HashMap symFile) {
if (previous == Symbol.NONE || previous.isPackage()) return true;
if (previous.pos != Position.NOPOS) return false;
AbstractFile pf = (AbstractFile) symFile.get(previous);
if (f.getName().endsWith(".scala")) {
if (pf.getName().endsWith(".scala")) return false;
if (!global.separate) return true;
}
if (f.getName().endsWith(".class")) {
if (pf.getName().endsWith(".class")) return false;
if (!global.separate) return false;
}
return f.lastModified() > pf.lastModified();
}
/** read directory of a classpath directory and include members
* in package/module scope
*/
protected void includeMembers(AbstractFile dir, Symbol p, Scope locals,
HashMap symFile) {
if (dir == null)
return;
boolean inclClasses = p != global.definitions.ROOT_CLASS;
String[] filenames = null;
try {
if ((filenames = dir.list()) == null)
return;
for (int j = 0; j < filenames.length; j++) {
String fname = filenames[j];
AbstractFile f = dir.open(fname);
if (inclClasses && fname.endsWith(".class")) {
Name n = Name.fromString(fname.substring(0, fname.length() - 6))
.toTypeName();
if (isMostRecent(f, locals.lookup(n), symFile)) {
ClassSymbol clazz = new ClassSymbol(n, p, classCompletion);
// todo: needed?
clazz.allConstructors().setInfo(
classCompletion.staticsParser(clazz));
clazz.module().setInfo(
classCompletion.staticsParser(clazz));
// enter class
locals.enter(clazz);
// enter module, except for scala.Object class
// todo: why not there also?.
if (!(n == Names.Object.toTypeName() &&
p.fullName().toTermName() == Names.scala)) {
Scope.Entry e = locals.lookupEntry(clazz.module().name);
if (e != Scope.Entry.NONE) {
// we already have a package of the same name; delete it
locals.unlink(e);
}
locals.enter(clazz.module());
}
symFile.put(clazz, f);
}
} else if (inclClasses && fname.endsWith(".scala")) {
Name n = Name.fromString(fname.substring(0, fname.length() - 6))
.toTypeName();
if (isMostRecent(f, locals.lookup(n), symFile)) {
SourceCompleter completer = new SourceCompleter(global);
ClassSymbol clazz = new ClassSymbol(n, p, completer);
//todo: needed?
clazz.allConstructors().setInfo(completer);
clazz.module().setInfo(completer);
// enter class
locals.enter(clazz);
locals.enter(clazz.module());
symFile.put(clazz, f);
}
} else if (fname.endsWith("/") && !fname.equals("META-INF/")) {
Name n = Name.fromString(fname.substring(0, fname.length() - 1));
if (locals.lookup(n) == Symbol.NONE) {
TermSymbol module = TermSymbol.newJavaPackageModule(n, p, this);
locals.enter(module);
//todo: moduleClass needs to be entered?
locals.enter(module.moduleClass());
}
}
}
} catch (IOException e) {
}
}
}
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