nmode's Git Repositories - signal-cli/blob - src/main/java/org/asamk/signal/PlainTextWriterImpl.java

   1 package org.asamk.signal;
   2
   3 import org.slf4j.helpers.MessageFormatter;
   4
   5 import java.io.BufferedWriter;
   6 import java.io.IOException;
   7 import java.io.OutputStream;
   8 import java.io.OutputStreamWriter;
   9 import java.io.Writer;
  10
  11 public final class PlainTextWriterImpl implements PlainTextWriter {
  12
  13     private final Writer writer;
  14
  15     private PlainTextWriter indentedWriter;
  16
  17     public PlainTextWriterImpl(final OutputStream outputStream) {
  18         this.writer = new BufferedWriter(new OutputStreamWriter(outputStream));
  19     }
  20
  21     @Override
  22     public void println(String format, Object... args) throws IOException {
  23         final String message = MessageFormatter.arrayFormat(format, args).getMessage();
  24
  25         writer.write(message);
  26         writer.write(System.lineSeparator());
  27         writer.flush();
  28     }
  29
  30     @Override
  31     public PlainTextWriter indentedWriter() {
  32         if (indentedWriter == null) {
  33             indentedWriter = new IndentedPlainTextWriter(this, writer);
  34         }
  35         return indentedWriter;
  36     }
  37
  38     private static final class IndentedPlainTextWriter implements PlainTextWriter {
  39
  40         private final static int INDENTATION = 2;
  41
  42         private final String spaces = " ".repeat(INDENTATION);
  43         private final PlainTextWriter plainTextWriter;
  44         private final Writer writer;
  45
  46         private PlainTextWriter indentedWriter;
  47
  48         private IndentedPlainTextWriter(final PlainTextWriter plainTextWriter, final Writer writer) {
  49             this.plainTextWriter = plainTextWriter;
  50             this.writer = writer;
  51         }
  52
  53         @Override
  54         public void println(final String format, final Object... args) throws IOException {
  55             writer.write(spaces);
  56             plainTextWriter.println(format, args);
  57         }
  58
  59         @Override
  60         public PlainTextWriter indentedWriter() {
  61             if (indentedWriter == null) {
  62                 indentedWriter = new IndentedPlainTextWriter(this, writer);
  63             }
  64             return indentedWriter;
  65         }
  66     }
  67 }