File access to /res folder before decompression
Hi, anyone please assist on how i would access a compressed text file in the /res folder before I can decompress it. I also need to know if its possible to create a file since the decompression algorithm creates a new decompressed file. The following code runs on a computer but I need to use it in the J2ME platform by calling it from the midlet class. Any assistance will be highly appreciated:
import java.io.*;
import java.util.*;
public class Decompress{
final static int MAX_CODES = 4096;
final static int BYTE_SIZE = 8;
final static int EXCESS = 4;
final static int ALPHA= 256;
final static int MASK = 15;
static int [] s;
static int size;
static Element [] h;
static int leftOver;
static boolean bitsLeftOver;
static BufferedInputStream in;
static BufferedOutputStream out;
private static void setFiles(String[] args) throws IOException{
String inputFile, outputFile;
if(args.length >= 1){
inputFile = args[0];
if(!inputFile.endsWith(".lzw")){
System.out.println("The filename must end with \"lzw\" extension");
System.exit(1);
}
in = new BufferedInputStream(new FileInputStream(inputFile));
outputFile = inputFile.substring(0, inputFile.length()-4);
out = new BufferedOutputStream(new FileOutputStream(outputFile));
}
else{
System.out.print("usage:java Decompress <filename>");
System.exit(1);
}
}
private static void output(int code)throws IOException{
size = -1;
while(code>=ALPHA){
s[++size]=h[code].suffix;
code = h[code].prefix;
}
s[++size]=code;
for(int i=size; i>=0; i--)
out.write(s);
}
private static int getCode() throws IOException{
int c = in.read();
if(c == -1)return -1;
int code;
if(bitsLeftOver)
code = (leftOver<<BYTE_SIZE)+c;
else{
int d = in.read();
code = (c<<EXCESS)+(d>>EXCESS);
leftOver = d&MASK;
}
bitsLeftOver = !bitsLeftOver;
return code;
}
private static void decompress() throws IOException{
int codeUsed = ALPHA;
s = new int[MAX_CODES];
h = new Element[MAX_CODES];
int pcode = getCode(), ccode;
if(pcode>=0){
s[0] = pcode;
out.write(s[0]);
size = 0;
do{
ccode = getCode();
if(ccode<0)break;
if(ccode<codeUsed){
output(ccode);
if(codeUsed><MAX_CODES)
h[codeUsed++] = new Element(pcode, s[size]);
}
else{
h[codeUsed++] = new Element(pcode, s[size]);
output(ccode);
}
pcode = ccode;
}while(true);
}
out.close();
in.close();
}
public static void main(String [] args) throws IOException{
setFiles(args);
decompress();
}
}>
