com.awcoleman.BouncyCastleGenericCDRHadoop.StandaloneDecoder.java Source code

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Here is the source code for com.awcoleman.BouncyCastleGenericCDRHadoop.StandaloneDecoder.java

Source

package com.awcoleman.BouncyCastleGenericCDRHadoop;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.bouncycastle.asn1.ASN1InputStream;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;

/**
 * 
 * A standalone decoder for the example ASN.1 specification "Simple Generic CDR".
 * 
 * ASN.1 specification "Simple Generic CDR":
 * <pre>
 * {@code
 * GenericCDR-Schema DEFINITIONS IMPLICIT TAGS ::= 
 * BEGIN
 * GenericCallDataRecord ::= SEQUENCE {
 *    recordNumber [APPLICATION 2] IMPLICIT INTEGER,
 *    callingNumber [APPLICATION 8] IMPLICIT UTF8String (SIZE(1..20)),
 *    calledNumber [APPLICATION 9] IMPLICIT UTF8String (SIZE(1..20)),
 *    startDate [APPLICATION 16] IMPLICIT  UTF8String (SIZE(8)),
 *    startTime [APPLICATION 18] IMPLICIT UTF8String (SIZE(6)),
 *    duration [APPLICATION 19] IMPLICIT INTEGER
 * }
 * END
 * }
 * </pre>
 * 
 * @author awcoleman
 * @version 20140525
 * license: Apache License 2.0; http://www.apache.org/licenses/LICENSE-2.0
 * 
 */
public class StandaloneDecoder {

    public StandaloneDecoder(String filename) throws IOException {

        File fileIn = new File(filename);
        FileInputStream fin = new FileInputStream(fileIn);
        InputStream is = decompressStream(fin);

        ASN1InputStream asnin = new ASN1InputStream(is);
        ASN1Primitive obj = null;

        while ((obj = asnin.readObject()) != null) {

            CallDetailRecord thisCdr = new CallDetailRecord((ASN1Sequence) obj);

            System.out.println("CallDetailRecord " + thisCdr.getRecordNumber() + " Calling "
                    + thisCdr.getCallingNumber() + " Called " + thisCdr.getCalledNumber() + " Start Date-Time "
                    + thisCdr.getStartDate() + "-" + thisCdr.getStartTime() + " duration " + thisCdr.getDuration());

        }

        asnin.close();
        is.close();
        fin.close();
    }

    public static InputStream decompressStream(InputStream input) {
        InputStream returnStream = null;
        org.apache.commons.compress.compressors.CompressorInputStream cis = null;
        BufferedInputStream bis = null;
        try {
            bis = new BufferedInputStream(input);
            bis.mark(1024); //Mark stream to reset if uncompressed data
            cis = new org.apache.commons.compress.compressors.CompressorStreamFactory()
                    .createCompressorInputStream(bis);
            returnStream = cis;
        } catch (org.apache.commons.compress.compressors.CompressorException ce) { //CompressorStreamFactory throws CompressorException for uncompressed files
            try {
                bis.reset();
            } catch (IOException ioe) {
                String errmessageIOE = "IO Exception ( " + ioe.getClass().getName() + " ) : " + ioe.getMessage();
                System.out.println(errmessageIOE);
            }
            returnStream = bis;
        } catch (Exception e) {
            String errmessage = "Exception ( " + e.getClass().getName() + " ) : " + e.getMessage();
            System.out.println(errmessage);
        }
        return returnStream;
    }

    public static void main(String[] args) {

        if (args.length < 1) {
            System.out.println("Missing a filename. Exiting.");
            System.exit(1);
        }

        String filename = args[0];
        try {
            @SuppressWarnings("unused")
            StandaloneDecoder mainObj = new StandaloneDecoder(filename);
        } catch (IOException ioe) {
            String errmessage = "ERROR. EXITING. Exception ( " + ioe.getClass().getName() + " ) : "
                    + ioe.getMessage();
            System.out.println(errmessage);
            ioe.printStackTrace();
            System.exit(1);
        }
    }

}