package ca.uhn.hl7v2.examples;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import ca.uhn.hl7v2.model.Message;
import ca.uhn.hl7v2.util.Hl7InputStreamMessageIterator;
import ca.uhn.hl7v2.util.Hl7InputStreamMessageStringIterator;
public class ReadMessagesFromFile {
public static void main(String[] args) throws FileNotFoundException {
/*
* This example shows how to read a series of messages from a file
* containing a number of HL7 messages. Assume you have a text file
* containing a number of messages.
*/
// Open an InputStream to read from the file
File file = new File("hl7_messages.txt");
InputStream is = new FileInputStream(file);
// It's generally a good idea to buffer file IO
is = new BufferedInputStream(is);
// The following class is a HAPI utility that will iterate over
// the messages which appear over an InputStream
Hl7InputStreamMessageIterator iter = new Hl7InputStreamMessageIterator(is);
while (iter.hasNext()) {
Message next = iter.next();
// Do something with the message
}
/*
* If you don't want the message parsed, you can also just
* read them in as strings.
*/
file = new File("hl7_messages.txt");
is = new FileInputStream(file);
is = new BufferedInputStream(is);
Hl7InputStreamMessageStringIterator iter2 = new Hl7InputStreamMessageStringIterator(is);
while (iter2.hasNext()) {
String next = iter2.next();
// Do something with the message
}
}
}