edu.sc.seis.seisFile.earthworm.EarthwormEscapeOutputStream Maven / Gradle / Ivy

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A library for reading and writing seismic file formats in java.

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package edu.sc.seis.seisFile.earthworm;

import java.io.Closeable;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.text.DecimalFormat;

public class EarthwormEscapeOutputStream extends FilterOutputStream {

    public EarthwormEscapeOutputStream(OutputStream out) {
        super(out);
    }

    @Override
    public void write(int b) throws IOException {
        if (b == EarthwormExport.STX || b == EarthwormExport.ESC || b == EarthwormExport.ETX) {
            super.write(EarthwormExport.ESC);
        }
        super.write(b);
    }
    
    /** not efficient, but...*/
    @Override
    public void write(byte[] b) throws IOException {
            write(b, 0, b.length);
    }
    
    /** not efficient, but...*/
    @Override
    public void write(byte[] b, int offset, int len) throws IOException {
        for (int i = offset; i < len && i < b.length; i++) {
            write(b[i]);
        }
    }
    
    public void startTransmit() throws IOException {
        super.write(EarthwormExport.STX);
    }
    
    public void endTransmit() throws IOException {
        super.write(EarthwormExport.ETX);
    }

    public void writeThreeChars(int val) throws IOException {
        String s = numberFormat.format(val);
        write(s.charAt(0));
        write(s.charAt(1));
        write(s.charAt(2));
    }

    public static void closeIfNotNull(Closeable out) {
        try {
            if (out != null) {
                out.close();
            }
        } catch(IOException e1) {
            // oh well...
        }
    }

    DecimalFormat numberFormat = new DecimalFormat("000");
    
}