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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
\* */
// $Id$
package scala.tools.util;
import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;
/** This class represents a Java/Scala class path. */
public class ClassPath {
//########################################################################
// Public Constants
/** The system-dependent path-separator character */
public static final String PATH_SEPARATOR =
System.getProperty("path.separator", ":");
/** The location of the scala library classes */
public static final String SCALA_LIBRARY_CLASSPATH =
System.getProperty("scala.library.class.path", "");
/** The location of the scala library sources */
public static final String SCALA_LIBRARY_SOURCEPATH =
System.getProperty("scala.library.source.path", "");
/** The current VM's boot class path */
public static final String RUNTIME_BOOTCLASSPATH =
System.getProperty("sun.boot.class.path", "");
/** The current VM's extension directory path */
public static final String RUNTIME_EXTDIRS =
System.getProperty("java.ext.dirs", "");
/** The implicit boot class path */
public static final String IMPLICIT_BOOTCLASSPATH =
concat(new String[]{
SCALA_LIBRARY_CLASSPATH,
SCALA_LIBRARY_SOURCEPATH,
RUNTIME_BOOTCLASSPATH});
/** The default class path */
public static final String DEFAULT_CLASSPATH =
System.getProperty("scala.class.path", ".");
/** The default source path */
public static final String DEFAULT_SOURCEPATH =
System.getProperty("scala.source.path", "");
/** The default boot class path */
public static final String DEFAULT_BOOTCLASSPATH =
System.getProperty("scala.boot.class.path", IMPLICIT_BOOTCLASSPATH);
/** The default extension directory path */
public static final String DEFAULT_EXTDIRS =
System.getProperty("scala.ext.dirs", RUNTIME_EXTDIRS);
//########################################################################
// 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 concatenation of the two paths. */
private static String concat(String path1, String path2) {
if (path1.length() == 0) return path2;
if (path2.length() == 0) return path1;
return path1 + PATH_SEPARATOR + path2;
}
/** Returns the concatenation of the array of paths. */
private static String concat(String[] paths) {
String path = "";
for (int i = 0; i < paths.length; i++) path = concat(path, paths[i]);
return path;
}
//########################################################################
// Private Fields
/** The abstract directory represented by this class path */
private final AbstractFile root;
//########################################################################
// Public Constructors
/** Initializes this instance with default paths. */
public ClassPath() {
this(DEFAULT_CLASSPATH);
}
/**
* Initializes this instance with the specified class path and
* default source, boot class and extension directory paths.
*/
public ClassPath(String classpath) {
this(classpath, DEFAULT_SOURCEPATH, DEFAULT_BOOTCLASSPATH,
DEFAULT_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 IMPLICIT_BOOTCLASSPATH
if (!bootclasspath.equals(IMPLICIT_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) + IMPLICIT_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(); ) {
AbstractFile dir = AbstractFile.getDirectory((File)i.next());
if (dir != null) dirs.add(dir);
}
Object[] array = dirs.toArray(new AbstractFile[dirs.size()]);
this.root = DirectoryPath.fromArray("<root>", (AbstractFile[])array);
}
//########################################################################
// Public Methods
/** Returns the root of this class path. */
public AbstractFile getRoot() {
return root;
}
/** Returns a string representation of this class path. */
public String toString() {
return root.toString();
}
//########################################################################
}
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