I get a java.lang.ArrayIndexOutOfBoundsException when using ByteArrayInputStream.
First, I use a ZipInputStream to read through a zip file, and while looping through the zipEntries, I use a ByteArrayInputStream to capture the data of each zipEntry using the ZipInputStream.read(byte[] b) and ByteArrayInputStream(byte[] b) methods.
At the end, I have a total of 6 different ByteArrayInputStream objects containing data from 6 different zipEntries. I then use OpenCSV to read through each of the ByteArrayInputStream.
I have no problem reading 4 of the 6 ByteArrayInputStream objects, of which have byte sizes of less than 2000.
The other 2 ByteArrayInputStream objects have byte sizes of 2155 and 4010 respectively and the CSVreader was only able to read part of these 2 objects, then give an java.lang.ArrayIndexOutOfBoundsException.
This is the code I used to loop through the ZipInputStream
InputStream fileStream = attachment.getInputStream();
try {
ZipInputStream zippy = new ZipInputStream(fileStream);
ZipEntry entry = zippy.getNextEntry();
ByteArrayInputStream courseData = null;
while (entry!= null) {
String name = entry.getName();
long size = entry.getSize();
if (name.equals("course.csv")) {
courseData = copyInputStream(zippy, (int)size);
}
//similar IF statements for 5 other ByteArrayInputStream objects
entry = zippy.getNextEntry();
}
CourseDataManager.load(courseData);
}catch(Exception e){
e.printStackTrace();
}
The following is the code with which I use to copy the data from the ZipInputStream to the ByteArrayInputStream.
public ByteArrayInputStream copyInputStream(InputStream in, int size)
throws IOException {
byte[] buffer = new byte[size];
in.read(buffer);
ByteArrayInputStream b = new ByteArrayInputStream(buffer);
return b;
}
The 2 sets of openCSV codes are able to read a few lines of data, before throwing that exception, which leads me to believe that it is the byteArray that is causing the problem. Is there anything I can do or work around this problem? I am trying to make an application that accepts a zip file, while not storing any temporary files in the web app, as I am deploying to both google app engine and tomcat server.
Fixed!!! Thanks to stephen C, i realized that read(byte[]) does not read everything so I adjusted the code to make the copyInputStream fully functional.
