java.io.zip.Deflater.df.getAdler() always return -1 ...

From:

lbrt chx _ gemale kom

Newsgroups:

comp.lang.java.programmer

Date:

04 Jan 2011 16:49:57 GMT

Message-ID:

<1294159796.962431@nntp.aceinnovative.com>

import java.io.*;
import java.util.*;
import java.util.zip.*;

// __
class UnzipWithChecksum02{
ArrayList<Long> ALL;
// __
UnzipWithChecksum02(){ ALL = new ArrayList<Long>(); }
// __
public Long[] unzip(String[] aIFls){
  Long[] LAdler32Ar = null;
// __
  int iRdByts, iBfrSz = 2048;
  byte[] buffer = new byte[iBfrSz];
  ZipEntry ZEnt;
  CheckedInputStream ChkSum = null;
  long lAdler32;
  Long LAdler32;
// __
  if((aIFls != null) && (aIFls.length > 0)){

   for(int i = 0; (i < aIFls.length); ++i){
    LAdler32 = null;
    ZipInputStream ZIS = null;
// __
    try{
     File IFl = new File(aIFls[i]);
// __ Creating input stream that also maintains the ChkSum of the data which later can be used to validate data integrity.
     ChkSum = new CheckedInputStream(new FileInputStream(IFl), new Adler32());
     ZIS = new ZipInputStream(new BufferedInputStream(ChkSum));
// __
     while((ZEnt = ZIS.getNextEntry()) != null){
      while(ZIS.read() != -1);
     }
     ZIS.close();
// __
     lAdler32 = ChkSum.getChecksum().getValue();
System.err.println("// __ lAdler32: |" + lAdler32 + "|");
     LAdler32 = new Long(lAdler32);
// __

    }catch(FileNotFoundException FNFX){ FNFX.printStackTrace(System.err); }
     catch(IOException IOX){ IOX.printStackTrace(System.err); }
// __
    finally {
     if(ZIS != null){ try{ ZIS.close(); }catch(IOException IOX){ ; } }
    }
// __
    ALL.add(LAdler32);
   }// i: [0, )
// __
   if(ALL.size() > 0){ LAdler32Ar = new Long[ALL.size()]; ALL.toArray(LAdler32Ar); }
  }// ((aIFls != null) && (aIFls.length > 0))
// __
  return(LAdler32Ar);
}
}