/**
* Returns an InputStream for reading the contents of the given entry.
*
* @param ze the entry to get the stream for.
* @return a stream to read the entry from.
* @throws IOException if unable to create an input stream from the zipenty
* @throws ZipException if the zipentry uses an unsupported feature
*/
public java.io.InputStream getInputStream(ZipArchiveEntry ze)
//throws IOException, ZipException
{
IAC_OffsetEntry offsetEntry = entries.get(ze);
if (offsetEntry == null)
{
return(null);
}
ZipUtil.checkRequestedFeatures(ze);
long start = offsetEntry.dataOffset;
BoundedInputStream bis =
new BoundedInputStream(this, start, ze.getCompressedSize());
switch (ze.getMethod())
{
case ZipArchiveEntry.STORED:
return(bis);
case ZipArchiveEntry.DEFLATED:
bis.addDummy();
return(new java.util.zip.InflaterInputStream(bis, new java.util.zip.Inflater(true)));
default:
throw new java.util.zip.ZipException("Found unsupported compression method "
+ ze.getMethod());
}
}
/**
* Walks through all recorded entries and adds the data available
* from the local file header.
*
* <p>Also records the offsets for the data to read from the
* entries.</p>
*/
private void resolveLocalFileHeaderData(java.util.Map <ZipArchiveEntry, IAC_NameAndComment> entriesWithoutUTF8Flag)
//throws IOException
{
java.util.Enumeration <ZipArchiveEntry> e = getEntries();
while (e.hasMoreElements())
{
ZipArchiveEntry ze = e.nextElement();
IAC_OffsetEntry offsetEntry = entries.get(ze);
long offset = offsetEntry.headerOffset;
archive.seek(offset + LFH_OFFSET_FOR_FILENAME_LENGTH);
byte[] b = new byte[SHORT];
archive.readFully(b);
int fileNameLen = ZipShort.getValue(b);
archive.readFully(b);
int extraFieldLen = ZipShort.getValue(b);
int lenToSkip = fileNameLen;
while (lenToSkip > 0)
{
int skipped = archive.skipBytes(lenToSkip);
if (skipped <= 0)
{
throw new java.lang.RuntimeException("failed to skip file name in"
+ " local file header");
}
lenToSkip -= skipped;
}
byte[] localExtraData = new byte[extraFieldLen];
archive.readFully(localExtraData);
ze.setExtra(localExtraData);
/*dataOffsets.put(ze,
* new Long(offset + LFH_OFFSET_FOR_FILENAME_LENGTH
+ SHORT + SHORT + fileNameLen + extraFieldLen));
*/
offsetEntry.dataOffset = offset + LFH_OFFSET_FOR_FILENAME_LENGTH
+ SHORT + SHORT + fileNameLen + extraFieldLen;
if (entriesWithoutUTF8Flag.containsKey(ze))
{
String orig = ze.getName();
IAC_NameAndComment nc = (IAC_NameAndComment)entriesWithoutUTF8Flag.get(ze);
ZipUtil.setNameAndCommentFromExtraFields(ze, nc.name, nc.comment);
if (!orig.equals(ze.getName()))
{
nameMap.remove(orig);
nameMap.put(ze.getName(), ze);
}
}
}
}
public int compare(ZipArchiveEntry e1, ZipArchiveEntry e2)
{
if (e1 == e2)
{
return(0);
}
IAC_OffsetEntry off1 = (IAC_OffsetEntry)root.entries.get(e1);
IAC_OffsetEntry off2 = (IAC_OffsetEntry)root.entries.get(e2);
if (off1 == null)
{
return(1);
}
if (off2 == null)
{
return(-1);
}
long val = (off1.headerOffset - off2.headerOffset);
return(val == 0 ? 0 : val < 0 ? -1 : +1);
}
/**
* Reads the central directory of the given archive and populates
* the internal tables with ZipArchiveEntry instances.
*
* <p>The ZipArchiveEntrys will know all data that can be obtained from
* the central directory alone, but not the data that requires the
* local file header or additional data to be read.</p>
*
* @return a Map<ZipArchiveEntry, NameAndComment>> of
* zipentries that didn't have the language encoding flag set when
* read.
*/
private java.util.Map <ZipArchiveEntry, IAC_NameAndComment> populateFromCentralDirectory()
//throws IOException
{
java.util.HashMap <ZipArchiveEntry, IAC_NameAndComment> noUTF8Flag = new java.util.HashMap <ZipArchiveEntry, IAC_NameAndComment>();
positionAtCentralDirectory();
byte[] cfh = new byte[CFH_LEN];
byte[] signatureBytes = new byte[WORD];
archive.readFully(signatureBytes);
long sig = ZipLong.getValue(signatureBytes);
long cfhSig = ZipLong.getValue(ZipArchiveOutputStream.CFH_SIG);
if (sig != cfhSig && startsWithLocalFileHeader())
{
throw new java.io.IOException("central directory is empty, can't expand"
+ " corrupt archive.");
}
while (sig == cfhSig)
{
archive.readFully(cfh);
int off = 0;
ZipArchiveEntry ze = new ZipArchiveEntry();
int versionMadeBy = ZipShort.getValue(cfh, off);
off += SHORT;
ze.setPlatform((versionMadeBy >> BYTE_SHIFT) & NIBLET_MASK);
off += SHORT; // skip version info
GeneralPurposeBit gpFlag = GeneralPurposeBit.parse(cfh, off);
bool hasUTF8Flag = gpFlag.usesUTF8ForNames();
ZipEncoding entryEncoding =
hasUTF8Flag ? ZipEncodingHelper.UTF8_ZIP_ENCODING : zipEncoding;
ze.setGeneralPurposeBit(gpFlag);
off += SHORT;
ze.setMethod(ZipShort.getValue(cfh, off));
off += SHORT;
// FIXME this is actually not very cpu cycles friendly as we are converting from
// dos to java while the underlying Sun implementation will convert
// from java to dos time for internal storage...
long time = ZipUtil.dosToJavaTime(ZipLong.getValue(cfh, off));
ze.setTime(time);
off += WORD;
ze.setCrc(ZipLong.getValue(cfh, off));
off += WORD;
ze.setCompressedSize(ZipLong.getValue(cfh, off));
off += WORD;
ze.setSize(ZipLong.getValue(cfh, off));
off += WORD;
int fileNameLen = ZipShort.getValue(cfh, off);
off += SHORT;
int extraLen = ZipShort.getValue(cfh, off);
off += SHORT;
int commentLen = ZipShort.getValue(cfh, off);
off += SHORT;
off += SHORT; // disk number
ze.setInternalAttributes(ZipShort.getValue(cfh, off));
off += SHORT;
ze.setExternalAttributes(ZipLong.getValue(cfh, off));
off += WORD;
byte[] fileName = new byte[fileNameLen];
archive.readFully(fileName);
ze.setName(entryEncoding.decode(fileName));
// LFH offset,
IAC_OffsetEntry offset = new IAC_OffsetEntry();
offset.headerOffset = ZipLong.getValue(cfh, off);
// data offset will be filled later
entries.put(ze, offset);
nameMap.put(ze.getName(), ze);
byte[] cdExtraData = new byte[extraLen];
archive.readFully(cdExtraData);
ze.setCentralDirectoryExtra(cdExtraData);
byte[] comment = new byte[commentLen];
archive.readFully(comment);
ze.setComment(entryEncoding.decode(comment));
archive.readFully(signatureBytes);
sig = ZipLong.getValue(signatureBytes);
if (!hasUTF8Flag && useUnicodeExtraFields)
{
noUTF8Flag.put(ze, new IAC_NameAndComment(fileName, comment));
}
}
return(noUTF8Flag);
}