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This is a trimmed down version of https://github.com/dmolony/dm3270 to be used as TN3270 client library

There is a newer version: 0.15-lib

package com.bytezone.dm3270.attributes;

import com.bytezone.dm3270.display.ScreenContext;

public class Charset extends Attribute {

  private final boolean aplCharset;

  public Charset(byte charset) {
    super(AttributeType.CHARSET, Attribute.XA_CHARSET, charset);
    aplCharset = (charset == (byte) 0xf1);
  }

  @Override
  public ScreenContext process(ScreenContext defaultContext, ScreenContext currentContext) {
    return currentContext.withGraphic(aplCharset);
  }

}