package com.sun.org.apache.bcel.internal.util;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache BCEL" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache BCEL", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.util.*;
import java.util.zip.*;
import java.io.*;
/**
* Responsible for loading (class) files from the CLASSPATH. Inspired by
* sun.tools.ClassPath.
*
* @version $Id: ClassPath.java,v 1.1 2003/12/12 09:01:32 rameshm Exp $
* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
*/
public class ClassPath {
private PathEntry[] paths;
/**
* Search for classes in given path.
*/
public ClassPath(String class_path) {
ArrayList vec = new ArrayList();
for(StringTokenizer tok=new StringTokenizer(class_path,
java.io.File.pathSeparator);
tok.hasMoreTokens();)
{
String path = tok.nextToken();
if(!path.equals("")) {
File file = new File(path);
try {
if(file.exists()) {
if(file.isDirectory())
vec.add(new Dir(path));
else
vec.add(new Zip(new ZipFile(file)));
}
} catch(IOException e) {
System.err.println("CLASSPATH component " + file + ": " + e);
}
}
}
paths = new PathEntry[vec.size()];
vec.toArray(paths);
}
/**
* Search for classes in CLASSPATH.
*/
public ClassPath() {
this(getClassPath());
}
private static final void getPathComponents(String path, ArrayList list) {
if(path != null) {
StringTokenizer tok = new StringTokenizer(path, File.pathSeparator);
while(tok.hasMoreTokens()) {
String name = tok.nextToken();
File file = new File(name);
if(file.exists())
list.add(name);
}
}
}
private static final String getClassPath() {
String class_path = System.getProperty("java.class.path");
String boot_path = System.getProperty("sun.boot.class.path");
String ext_path = System.getProperty("java.ext.dirs");
ArrayList list = new ArrayList();
getPathComponents(class_path, list);
getPathComponents(boot_path, list);
ArrayList dirs = new ArrayList();
getPathComponents(ext_path, dirs);
for(Iterator e = dirs.iterator(); e.hasNext(); ) {
File ext_dir = new File((String)e.next());
String[] extensions = ext_dir.list(new FilenameFilter() {
public boolean accept(File dir, String name) {
name = name.toLowerCase();
return name.endsWith(".zip") || name.endsWith(".jar");
}
});
if(extensions != null)
for(int i=0; i < extensions.length; i++)
list.add(ext_path + File.separatorChar + extensions[i]);
}
StringBuffer buf = new StringBuffer();
for(Iterator e = list.iterator(); e.hasNext(); ) {
buf.append((String)e.next());
if(e.hasNext())
buf.append(File.pathSeparatorChar);
}
return buf.toString();
}
/**
* @param name fully qualified class name, e.g. java.lang.String
* @return input stream for class
*/
public InputStream getInputStream(String name) throws IOException {
return getInputStream(name, ".class");
}
/**
* @param name fully qualified file name, e.g. java/lang/String
* @param suffix file name ends with suff, e.g. .java
* @return input stream for file on class path
*/
public InputStream getInputStream(String name, String suffix) throws IOException {
return getClassFile(name, suffix).getInputStream();
}
/**
* @param name fully qualified file name, e.g. java/lang/String
* @param suffix file name ends with suff, e.g. .java
* @return class file for the java class
*/
public ClassFile getClassFile(String name, String suffix) throws IOException {
for(int i=0; i < paths.length; i++) {
ClassFile cf;
if((cf = paths[i].getClassFile(name, suffix)) != null)
return cf;
}
throw new IOException("Couldn't find: " + name + suffix);
}
/**
* @param name fully qualified class name, e.g. java.lang.String
* @return input stream for class
*/
public ClassFile getClassFile(String name) throws IOException {
return getClassFile(name, ".class");
}
/**
* @param name fully qualified file name, e.g. java/lang/String
* @param suffix file name ends with suffix, e.g. .java
* @return byte array for file on class path
*/
public byte[] getBytes(String name, String suffix) throws IOException {
InputStream is = getInputStream(name, suffix);
if(is == null)
throw new IOException("Couldn't find: " + name + suffix);
DataInputStream dis = new DataInputStream(is);
byte[] bytes = new byte[is.available()];
dis.readFully(bytes);
dis.close(); is.close();
return bytes;
}
/**
* @return byte array for class
*/
public byte[] getBytes(String name) throws IOException {
return getBytes(name, ".class");
}
/**
* @param name name of file to search for, e.g. java/lang/String.java
* @return full (canonical) path for file
*/
public String getPath(String name) throws IOException {
int index = name.lastIndexOf('.');
String suffix = "";
if(index > 0) {
suffix = name.substring(index);
name = name.substring(0, index);
}
return getPath(name, suffix);
}
/**
* @param name name of file to search for, e.g. java/lang/String
* @param suffix file name suffix, e.g. .java
* @return full (canonical) path for file, if it exists
*/
public String getPath(String name, String suffix) throws IOException {
return getClassFile(name, suffix).getPath();
}
private static abstract class PathEntry {
abstract ClassFile getClassFile(String name, String suffix) throws IOException;
}
/** Contains information about file/ZIP entry of the Java class.
*/
public abstract static class ClassFile {
/** @return input stream for class file.
*/
public abstract InputStream getInputStream() throws IOException;
/** @return canonical path to class file.
*/
public abstract String getPath();
/** @return modification time of class file.
*/
public abstract long getTime();
/** @return size of class file.
*/
public abstract long getSize();
}
private static class Dir extends PathEntry {
private String dir;
Dir(String d) { dir = d; }
ClassFile getClassFile(String name, String suffix) throws IOException {
final File file = new File(dir + File.separatorChar +
name.replace('.', File.separatorChar) + suffix);
return file.exists()? new ClassFile() {
public InputStream getInputStream() throws IOException { return new FileInputStream(file); }
public String getPath() { try {
return file.getCanonicalPath();
} catch(IOException e) { return null; }
}
public long getTime() { return file.lastModified(); }
public long getSize() { return file.length(); }
} : null;
}
public String toString() { return dir; }
}
private static class Zip extends PathEntry {
private ZipFile zip;
Zip(ZipFile z) { zip = z; }
ClassFile getClassFile(String name, String suffix) throws IOException {
final ZipEntry entry = zip.getEntry(name.replace('.', '/') + suffix);
return (entry != null)? new ClassFile() {
public InputStream getInputStream() throws IOException { return zip.getInputStream(entry); }
public String getPath() { return entry.toString(); }
public long getTime() { return entry.getTime(); }
public long getSize() { return entry.getSize(); }
} : null;
}
}
}
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