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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
\* */
// $Id$
package scalac.util;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;
import scala.tools.util.AbstractFile;
/** This class represents a Java/Scala class path. */
public class ClassPath {
//########################################################################
// Public Constants
/** The system-dependent filename-separator character */
public static final String FILE_SEPARATOR = File.separator;
/** The system-dependent path-separator character */
public static final String PATH_SEPARATOR =
System.getProperty("path.separator", ":");
/** The default class path */
public static final String CLASSPATH =
System.getProperty("scala.class.path", ".");
/** The default source path */
public static final String SOURCEPATH = "";
/** The default boot class path */
public static final String BOOTCLASSPATH =
getDefaultBootClassPath();
/** The default extension directory path */
public static final String EXTDIRS =
System.getProperty("java.ext.dirs", "");
//########################################################################
// Public Functions
/**
* Adds all zip and jar archives found in the specified extension
* directory path to the specified file set. See also remark about
* file order in method "addFilesFromPath".
*/
public static void addArchivesInExtDirPath(Set/*<File>*/files,String path){
Set extdirs = new LinkedHashSet();
addFilesInPath(extdirs, path);
for (Iterator i = extdirs.iterator(); i.hasNext(); )
addArchivesInExtDir(files, (File)i.next());
}
/**
* Adds all zip and jar archives found in the specified extension
* directory to the specified file set. See also remark about file
* order in method "addFilesFromPath".
*/
public static void addArchivesInExtDir(Set/*<File>*/ files, File extdir) {
String[] names = extdir.list();
if (names == null) return;
for (int i = 0; i < names.length; i++) {
if (names[i].endsWith(".jar") || names[i].endsWith(".zip")) {
File archive = new File(extdir, names[i]);
if (archive.isFile()) files.add(archive);
}
}
}
/**
* Parses the specified path and adds all files that exist to the
* specified file set. If order needs to be preserved, one should
* pass in an order preserving implementation of Set.
*/
public static void addFilesInPath(Set/*<File>*/ files, String path) {
path += PATH_SEPARATOR;
for (int i = 0; i < path.length(); ) {
int j = path.indexOf(PATH_SEPARATOR, i);
File file = new File(path.substring(i, j));
if (file.exists()) files.add(file);
i = j + 1;
}
}
//########################################################################
// Private Functions
/** Returns the default boot class path. */
private static String getDefaultBootClassPath() {
String java = System.getProperty("sun.boot.class.path");
String scala = System.getProperty("scala.boot.class.path");
if (java == null) return scala == null ? "" : scala;
return scala == null ? java : java + PATH_SEPARATOR + scala;
}
/** the various class path roots
*/
protected String[] root;
/** print searches in the class path
*/
public boolean printSearch;
//########################################################################
// Public Constructors
/** Initializes this instance with default paths. */
public ClassPath() {
this(CLASSPATH);
}
/**
* Initializes this instance with the specified class path and
* default source, boot class and extension directory paths.
*/
public ClassPath(String classpath) {
this(classpath, SOURCEPATH, BOOTCLASSPATH, EXTDIRS);
}
/** Initializes this instance with the specified paths. */
public ClassPath(String classpath, String sourcepath, String bootclasspath,
String extdirs)
{
// replace first empty path in bootclasspath by BOOTCLASSPATH
if (!bootclasspath.equals(BOOTCLASSPATH)) {
String path = PATH_SEPARATOR + bootclasspath + PATH_SEPARATOR;
int index = path.indexOf(PATH_SEPARATOR + PATH_SEPARATOR);
if (index >= 0)
bootclasspath =
path.substring(1, index + 1) + BOOTCLASSPATH +
path.substring(index + 1, path.length() - 1);
}
Set files = new LinkedHashSet();
addFilesInPath(files, bootclasspath);
addArchivesInExtDirPath(files, extdirs);
addFilesInPath(files, classpath);
addFilesInPath(files, sourcepath);
ArrayList dirs = new ArrayList(files.size());
for (Iterator i = files.iterator(); i.hasNext(); ) {
File file = (File)i.next();
if (file.exists()) dirs.add(file.getPath());
}
this.root = (String[])dirs.toArray(new String[dirs.size()]);
}
//########################################################################
// Public Methods
/** find file with given name in class path and return an abstract
* file representation
*/
public AbstractFile openFile(String name) throws FileNotFoundException {
if (printSearch)
System.out.println("looking for " + name);
for (int i = 0; i < root.length; i++) {
if (printSearch)
System.out.println(" in " + root[i]);
AbstractFile f = AbstractFile.open(root[i], name);
if (f != null)
return f;
}
throw new FileNotFoundException("file '" + name +
"' not found in classpath");
}
public String[] components() {
return root;
}
/** return a textual representation of this class path
*/
public String toString() {
if (root.length == 0)
return "";
else if (root.length == 1)
return root[0];
String path = root[0];
for (int i = 1; i < root.length; i++)
path += PATH_SEPARATOR + root[i];
return path;
}
//########################################################################
}
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