in src/main/java/org/apache/sling/commons/mime/internal/MimeTypeServiceImpl.java [113:129]
public String getExtension(String mimeType) {
if (mimeType == null) {
return null;
}
// compare using lowercase only
mimeType = mimeType.toLowerCase();
String ext = this.extensionMap.get(mimeType);
if (ext == null) {
MimeTypeProvider[] mtp = this.getMimeTypeProviders();
for (int i = 0; ext == null && i < mtp.length; i++) {
ext = mtp[i].getExtension(mimeType);
}
}
return ext;
}