Android Open Source - sodf Compressor

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Back to project page sodf.

License

The source code is released under:

Copyright (c) 2013 Lorenz Lehmann Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Sof...

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Java Source Code

package lal.sodf.framework.compressor;
/*  www .  j av  a2 s. co m*/
import lal.sodf.framework.exceptions.CompressionAlgorithmNotFoundException;

/**
 * Compresses or decompresses a SODF ontology given as string
 * @author Lorenz Lehmann
 *
 */
public class Compressor {
  
  /**
   * Compress an ontology with a given algorithm
   * @param ontology The ontology in string representaion, which will be compressed
   * @param algorithm The algorithm as string, which will be used for the compression
   * @return A compressed version of the string
   * @throws CompressionAlgorithmNotFoundException 
   */
  public byte[] compress(String ontology, String algorithm) throws CompressionAlgorithmNotFoundException{
    return compress(ontology, Compressor.alogrithmSelector(algorithm));
  }
  
  /**
   * Compress an ontology with a given algorithm
   * @param ontology The ontology in string representaion, which will be compressed
   * @param algorithm The algorithm as string, which will be used for the compression
   * @return A compressed version of the string
   */
  public byte[] compress(String ontology, CompressionAlgorithm algorithm){
    if (algorithm == null) return null;
    //let the algorithm do the work
    return algorithm.compress(ontology);
  }
  
  /**
   * Decompress an ontology with a given algorithm
   * @param ontology The ontology in string representaion, which will be decompressed
   * @param algorithm The algorithm as string, which will be used for the decompression
   * @return A decompressed version of the string
   * @throws CompressionAlgorithmNotFoundException 
   */
  public String decompress(byte[] ontology, String algorithm) throws CompressionAlgorithmNotFoundException{
    return decompress(ontology, Compressor.alogrithmSelector(algorithm));
  }
  
  /**
   * Decompress an ontology with a given algorithm
   * @param ontology The ontology in string representaion, which will be decompressed
   * @param algorithm The algorithm as string, which will be used for the decompression
   * @return A decompressed version of the string
   */
  public String decompress(byte[] ontology, CompressionAlgorithm algorithm){
    if (algorithm == null) return null;
    //let the algorithm do the work
    return algorithm.decompress(ontology);
  }
  
  /** Select the correct algorithm based on the provided string */
  public static CompressionAlgorithm alogrithmSelector(String algorithm) throws CompressionAlgorithmNotFoundException{
    String val = algorithm.toLowerCase();
    if (val.equals("gzip")) return new Gzip();
    else throw new CompressionAlgorithmNotFoundException();
  }
}

Java Source Code List