gistfile1.groovy

import java.nio.charset.*
import java.nio.*

class ebcdic2 {
	
	static main(args) {
		
		Charset.metaClass.isEBCDIC = {
				// This byte value of 'a' is the same in all EBCDIC flavours.
				// We use can this to positively identify EBCDIC Charsets.
				final ByteBuffer FIXED_EBCDIC_CODEPOINT = ByteBuffer.wrap("a".getBytes("IBM-1047"))
				try {
					return delegate.newDecoder()
							.onMalformedInput(CodingErrorAction.REPLACE)
							.onUnmappableCharacter(CodingErrorAction.REPLACE)
							.decode(FIXED_EBCDIC_CODEPOINT).toString().equals("a")
				} catch (Exception e) {
					return false
				}
			}
		
		println Charset
				.availableCharsets()
				.findAll { name, charset -> charset.isEBCDIC() }
				.values()
	}
}