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) {
  23         final var message = MessageFormatter.arrayFormat(format, args).getMessage();
  24
  25         try {
  26             writer.write(message);
  27             writer.write(System.lineSeparator());
  28             writer.flush();
  29         } catch (IOException e) {
  30             throw new AssertionError(e);
  31         }
  32     }
  33
  34     @Override
  35     public PlainTextWriter indentedWriter() {
  36         if (indentedWriter == null) {
  37             indentedWriter = new IndentedPlainTextWriter(this, writer);
  38         }
  39         return indentedWriter;
  40     }
  41
  42     private static final class IndentedPlainTextWriter implements PlainTextWriter {
  43
  44         private final static int INDENTATION = 2;
  45
  46         private final String spaces = " ".repeat(INDENTATION);
  47         private final PlainTextWriter plainTextWriter;
  48         private final Writer writer;
  49
  50         private PlainTextWriter indentedWriter;
  51
  52         private IndentedPlainTextWriter(final PlainTextWriter plainTextWriter, final Writer writer) {
  53             this.plainTextWriter = plainTextWriter;
  54             this.writer = writer;
  55         }
  56
  57         @Override
  58         public void println(final String format, final Object... args) {
  59             try {
  60                 writer.write(spaces);
  61             } catch (IOException e) {
  62                 throw new AssertionError(e);
  63             }
  64             plainTextWriter.println(format, args);
  65         }
  66
  67         @Override
  68         public PlainTextWriter indentedWriter() {
  69             if (indentedWriter == null) {
  70                 indentedWriter = new IndentedPlainTextWriter(this, writer);
  71             }
  72             return indentedWriter;
  73         }
  74     }
  75 }