/*
* Helper to read the entire contents of the manifest from the
* given input stream. Usually we can do this in a single read
* but we need to account for 'infinite' streams, by ensuring we
* have a line feed within a reasonable number of characters.
*/
private byte[] readFully(InputStream is) throws IOException {
// Initial read
byte[] buffer = new byte[4096];
int count = is.read(buffer);
int nextByte = is.read();
// Did we get it all in one read?
if (nextByte == -1) {
byte[] dest = new byte[count];
System.arraycopy(buffer, 0, dest, 0, count);
return dest;
}
// Does it look like a manifest?
if (!containsLine(buffer, count)) {
// archive.2E=Manifest is too long
throw new IOException(Messages.getString("archive.2E")); // $NON-NLS-1$
}
// Requires additional reads
ByteArrayOutputStream baos = new ByteArrayOutputStream(count * 2);
baos.write(buffer, 0, count);
baos.write(nextByte);
while (true) {
count = is.read(buffer);
if (count == -1) {
return baos.toByteArray();
}
baos.write(buffer, 0, count);
}
}
private static void writeEntry(
OutputStream os, Attributes.Name name, String value, CharsetEncoder encoder, ByteBuffer bBuf)
throws IOException {
byte[] out = name.getBytes();
if (out.length > LINE_LENGTH_LIMIT) {
throw new IOException(
Messages.getString(
"archive.33", name, Integer.valueOf(LINE_LENGTH_LIMIT))); // $NON-NLS-1$
}
os.write(out);
os.write(VALUE_SEPARATOR);
encoder.reset();
bBuf.clear().limit(LINE_LENGTH_LIMIT - out.length - 2);
CharBuffer cBuf = CharBuffer.wrap(value);
CoderResult r;
while (true) {
r = encoder.encode(cBuf, bBuf, true);
if (CoderResult.UNDERFLOW == r) {
r = encoder.flush(bBuf);
}
os.write(bBuf.array(), bBuf.arrayOffset(), bBuf.position());
os.write(LINE_SEPARATOR);
if (CoderResult.UNDERFLOW == r) {
break;
}
os.write(' ');
bBuf.clear().limit(LINE_LENGTH_LIMIT - 1);
}
}
/**
* Returns the {@code Manifest} object associated with this {@code JarFile} or {@code null} if no
* MANIFEST entry exists.
*
* @return the MANIFEST.
* @throws IOException if an error occurs reading the MANIFEST file.
* @throws IllegalStateException if the jar file is closed.
* @see Manifest
*/
public Manifest getManifest() throws IOException {
if (closed) {
// archive.35=JarFile has been closed
throw new IllegalStateException(Messages.getString("archive.35")); // $NON-NLS-1$
}
if (manifest != null) {
return manifest;
}
try {
InputStream is = super.getInputStream(manifestEntry);
if (verifier != null) {
verifier.addMetaEntry(manifestEntry.getName(), getAllBytesFromStreamAndClose(is));
is = super.getInputStream(manifestEntry);
}
try {
manifest = new Manifest(is, verifier != null);
} finally {
is.close();
}
manifestEntry = null; // Can discard the entry now.
} catch (NullPointerException e) {
manifestEntry = null;
}
return manifest;
}