/**
* If there are no extra fields, use the given fields as new extra data - otherwise merge the
* fields assuming the existing fields and the new fields stem from different locations inside the
* archive.
*
* @param f the extra fields to merge
* @param local whether the new fields originate from local data
*/
private void mergeExtraFields(ZipExtraField[] f, boolean local) throws ZipException {
if (extraFields == null) {
setExtraFields(f);
} else {
for (ZipExtraField element : f) {
ZipExtraField existing;
if (element instanceof UnparseableExtraFieldData) {
existing = unparseableExtra;
} else {
existing = getExtraField(element.getHeaderId());
}
if (existing == null) {
addExtraField(element);
} else {
if (local) {
byte[] b = element.getLocalFileDataData();
existing.parseFromLocalFileData(b, 0, b.length);
} else {
byte[] b = element.getCentralDirectoryData();
existing.parseFromCentralDirectoryData(b, 0, b.length);
}
}
}
setExtra();
}
}
/**
* Adds UnicodeExtra fields for name and file comment if mode is ALWAYS or the data cannot be
* encoded using the configured encoding.
*/
private void addUnicodeExtraFields(ZipArchiveEntry ze, boolean encodable, ByteBuffer name)
throws IOException {
if (createUnicodeExtraFields == UnicodeExtraFieldPolicy.ALWAYS || !encodable) {
ze.addExtraField(
new UnicodePathExtraField(
ze.getName(), name.array(), name.arrayOffset(), name.limit() - name.position()));
}
String comm = ze.getComment();
if (comm != null && !"".equals(comm)) {
boolean commentEncodable = zipEncoding.canEncode(comm);
if (createUnicodeExtraFields == UnicodeExtraFieldPolicy.ALWAYS || !commentEncodable) {
ByteBuffer commentB = getEntryEncoding(ze).encode(comm);
ze.addExtraField(
new UnicodeCommentExtraField(
comm,
commentB.array(),
commentB.arrayOffset(),
commentB.limit() - commentB.position()));
}
}
}