/**
* Searches for an entry inside the zip stream by entry path. If there are alternative extensions,
* will also look for entry with alternative extension. The search stops reading the stream when
* the entry is found, so calling read on the stream will read the returned entry.
*
* <p>The zip input stream doesn't support mark/reset so once this method is used you cannot go
* back - either the stream was fully read (when entry is not found) or the stream was read until
* the current entry.
*
* @param zis The zip input stream
* @param entryPath The entry path to search for
* @param alternativeExtensions List of alternative file extensions to try if the main entry path
* is not found.
* @return The entry if found, null otherwise
* @throws IOException On failure to read the stream
*/
public static ZipEntry locateEntry(
ZipInputStream zis, String entryPath, List<String> alternativeExtensions) throws IOException {
ZipEntry zipEntry;
while ((zipEntry = zis.getNextEntry()) != null) {
String zipEntryName = zipEntry.getName();
if (zipEntryName.equals(entryPath)) {
return zipEntry;
} else if (alternativeExtensions != null) {
String basePath = PathUtils.stripExtension(entryPath);
for (String alternativeExtension : alternativeExtensions) {
String alternativeSourcePath = basePath + "." + alternativeExtension;
if (zipEntryName.equals(alternativeSourcePath)) {
return zipEntry;
}
}
}
}
return null;
}
