/*
* Copyright (c) 2002, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.tools.javap;
import java.util.*;
import java.io.*;
import java.util.jar.*;
/**
* Strores flag values according to command line options
* and sets path where to find classes.
*
* @author Sucheta Dambalkar
*/
public class JavapEnvironment {
//Access flags
public static final int PRIVATE = 0;
public static final int PROTECTED = 1;
public static final int PACKAGE = 2;
public static final int PUBLIC = 3;
//search path flags.
private static final int start = 0;
private static final int cmdboot= 1;
private static final int sunboot = 2;
private static final int javaclass= 3;
private static final int cmdextdir= 4;
private static final int javaext= 5;
private static final int cmdclasspath= 6;
private static final int envclasspath= 7;
private static final int javaclasspath= 8;
private static final int currentdir = 9;
// JavapEnvironment flag settings
boolean showLineAndLocal = false;
int showAccess = PACKAGE;
boolean showDisassembled = false;
boolean showVerbose = false;
boolean showInternalSigs = false;
String classPathString = null;
String bootClassPathString = null;
String extDirsString = null;
boolean extDirflag = false;
boolean nothingToDo = true;
boolean showallAttr = false;
String classpath = null;
int searchpath = start;
/**
* According to which flags are set,
* returns file input stream for classfile to disassemble.
*/
public InputStream getFileInputStream(String Name){
InputStream fileInStream = null;
searchpath = cmdboot;
try{
if(searchpath == cmdboot){
if(bootClassPathString != null){
//search in specified bootclasspath.
classpath = bootClassPathString;
if((fileInStream = resolvefilename(Name)) != null) return fileInStream;
//no classes found in search path.
else searchpath = cmdextdir;
}
else searchpath = sunboot;
}
if(searchpath == sunboot){
if(System.getProperty("sun.boot.class.path") != null){
//search in sun.boot.class.path
classpath = System.getProperty("sun.boot.class.path");
if((fileInStream = resolvefilename(Name)) != null) return fileInStream;
//no classes found in search path
else searchpath = cmdextdir;
}
else searchpath = javaclass;
}
if(searchpath == javaclass){
if(System.getProperty("java.class.path") != null){
//search in java.class.path
classpath =System.getProperty("java.class.path");
if((fileInStream = resolvefilename(Name)) != null) return fileInStream;
//no classes found in search path
else searchpath = cmdextdir;
}
else searchpath = cmdextdir;
}
if(searchpath == cmdextdir){
if(extDirsString != null){
//search in specified extdir.
classpath = extDirsString;
extDirflag = true;
if((fileInStream = resolvefilename(Name)) != null) return fileInStream;
//no classes found in search path
else {
searchpath = cmdclasspath;
extDirflag = false;
}
}
else searchpath = javaext;
}
if(searchpath == javaext){
if(System.getProperty("java.ext.dirs") != null){
//search in java.ext.dirs
classpath = System.getProperty("java.ext.dirs");
extDirflag = true;
if((fileInStream = resolvefilename(Name)) != null) return fileInStream;
//no classes found in search path
else {
searchpath = cmdclasspath;
extDirflag = false;
}
}
else searchpath = cmdclasspath;
}
if(searchpath == cmdclasspath){
if(classPathString != null){
//search in specified classpath.
classpath = classPathString;
if((fileInStream = resolvefilename(Name)) != null) return fileInStream;
//no classes found in search path
else searchpath = 8;
}
else searchpath = envclasspath;
}
if(searchpath == envclasspath){
if(System.getProperty("env.class.path")!= null){
//search in env.class.path
classpath = System.getProperty("env.class.path");
if((fileInStream = resolvefilename(Name)) != null) return fileInStream;
//no classes found in search path.
else searchpath = javaclasspath;
}
else searchpath = javaclasspath;
}
if(searchpath == javaclasspath){
if(("application.home") == null){
//search in java.class.path
classpath = System.getProperty("java.class.path");
if((fileInStream = resolvefilename(Name)) != null) return fileInStream;
//no classes found in search path.
else searchpath = currentdir;
}
else searchpath = currentdir;
}
if(searchpath == currentdir){
classpath = ".";
//search in current dir.
if((fileInStream = resolvefilename(Name)) != null) return fileInStream;
else {
//no classes found in search path.
error("Could not find "+ Name);
System.exit(1);
}
}
}catch(SecurityException excsec){
excsec.printStackTrace();
error("fatal exception");
}catch(NullPointerException excnull){
excnull.printStackTrace();
error("fatal exception");
}catch(IllegalArgumentException excill){
excill.printStackTrace();
error("fatal exception");
}
return null;
}
public void error(String msg) {
System.err.println("ERROR:" +msg);
}
/**
* Resolves file name for classfile to disassemble.
*/
public InputStream resolvefilename(String name){
String classname = name.replace('.', '/') + ".class";
while (true) {
InputStream instream = extDirflag
? resolveExdirFilename(classname)
: resolveclasspath(classname);
if (instream != null)
return instream;
int lastindex = classname.lastIndexOf('/');
if (lastindex == -1) return null;
classname = classname.substring(0, lastindex) + "$" +
classname.substring(lastindex + 1);
}
}
/**
* Resolves file name for classfile to disassemble if flag exdir is set.
*/
public InputStream resolveExdirFilename(String classname){
if(classpath.indexOf(File.pathSeparator) != -1){
//separates path
StringTokenizer st = new StringTokenizer(classpath, File.pathSeparator);
while(st.hasMoreTokens()){
String path = st.nextToken();
InputStream in = resolveExdirFilenamehelper(path, classname);
if (in != null)
return in;
}
}else return (resolveExdirFilenamehelper(classpath, classname));
return null;
}
/**
* Resolves file name for classfile to disassemble.
*/
public InputStream resolveclasspath(String classname){
if(classpath.indexOf(File.pathSeparator) != -1){
StringTokenizer st = new StringTokenizer(classpath, File.pathSeparator);
//separates path.
while(st.hasMoreTokens()){
String path = (st.nextToken()).trim();
InputStream in = resolveclasspathhelper(path, classname);
if(in != null) return in;
}
return null;
}
else return (resolveclasspathhelper(classpath, classname));
}
/**
* Returns file input stream for classfile to disassemble if exdir is set.
*/
public InputStream resolveExdirFilenamehelper(String path, String classname){
File fileobj = new File(path);
if(fileobj.isDirectory()){
// gets list of files in that directory.
File[] filelist = fileobj.listFiles();
for(int i = 0; i < filelist.length; i++){
try{
//file is a jar file.
if(filelist[i].toString().endsWith(".jar")){
JarFile jfile = new JarFile(filelist[i]);
if((jfile.getEntry(classname)) != null){
InputStream filein = jfile.getInputStream(jfile.getEntry(classname));
int bytearraysize = filein.available();
byte []b = new byte[bytearraysize];
int totalread = 0;
while(totalread < bytearraysize){
totalread += filein.read(b, totalread, bytearraysize-totalread);
}
InputStream inbyte = new ByteArrayInputStream(b);
filein.close();
return inbyte;
}
} else {
//not a jar file.
String filename = path+"/"+ classname;
File file = new File(filename);
if(file.isFile()){
return (new FileInputStream(file));
}
}
}catch(FileNotFoundException fnexce){
fnexce.printStackTrace();
error("cant read file");
error("fatal exception");
}catch(IOException ioexc){
ioexc.printStackTrace();
error("fatal exception");
}
}
}
return null;
}
/**
* Returns file input stream for classfile to disassemble.
*/
public InputStream resolveclasspathhelper(String path, String classname){
File fileobj = new File(path);
try{
if(fileobj.isDirectory()){
//is a directory.
String filename = path+"/"+ classname;
File file = new File(filename);
if(file.isFile()){
return (new FileInputStream(file));
}
}else if(fileobj.isFile()){
if(fileobj.toString().endsWith(".jar")){
//is a jar file.
JarFile jfile = new JarFile(fileobj);
if((jfile.getEntry(classname)) != null){
InputStream filein = jfile.getInputStream(jfile.getEntry(classname));
int bytearraysize = filein.available();
byte []b = new byte[bytearraysize];
int totalread = 0;
while(totalread < bytearraysize){
totalread += filein.read(b, totalread, bytearraysize-totalread);
}
InputStream inbyte = new ByteArrayInputStream(b);
filein.close();
return inbyte;
}
}
}
}catch(FileNotFoundException fnexce){
fnexce.printStackTrace();
error("cant read file");
error("fatal exception");
}catch(IOException ioexce){
ioexce.printStackTrace();
error("fatal exception");
}
return null;
}
}