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PlantUML is a component that allows to quickly write diagrams from text.

There is a newer version: 1.2024.8

// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
package net.sourceforge.plantuml.code;

import java.io.IOException;

public class TranscoderSmart implements Transcoder {

	private final Transcoder zlib = TranscoderImpl.utf8(new AsciiEncoder(), new ArobaseStringCompressor(),
			new CompressionZlib());
	private final Transcoder hexOnly = TranscoderImpl.utf8(new AsciiEncoderHex(), new ArobaseStringCompressor(),
			new CompressionNone());
	// ::comment when __CORE__
	// Legacy encoder
	private final Transcoder oldOne = TranscoderImpl.utf8(new AsciiEncoder(), new ArobaseStringCompressor(),
			new CompressionHuffman());
	private final Transcoder zip = TranscoderImpl.utf8(new AsciiEncoder(), new ArobaseStringCompressor(),
			new CompressionZip());

	public String decode(String code) throws NoPlantumlCompressionException {
		// Work in progress
		// See https://github.com/plantuml/plantuml/issues/117

		if (code.startsWith("~0"))
			return zlib.decode(code.substring(2));

		// ::comment when __CORE__
		if (code.startsWith("~1"))
			return oldOne.decode(code.substring(2));

		if (code.startsWith("~h"))
			return hexOnly.decode(code.substring(2));

		// ::comment when __CORE__
		if (code.startsWith("~zip~"))
			return zip.decode(code.substring(5));

		// ::comment when __CORE__
		try {
			return zlib.decode(code);
			// ::comment when __CORE__
		} catch (Exception ex) {
			return oldOne.decode(code);
		}
		// return zlib.decode(code);
	}

	public String encode(String text) throws IOException {
		// Right now, we still use the legacy encoding.
		// This will be changed in the incoming months
		return zlib.encode(text);
	}
}