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## org.apache.lucene.document
Class CompressionTools

    java.lang.Object
      org.apache.lucene.document.CompressionTools

    public class CompressionTools

extends Object

Simple utility class providing static methods to compress and decompress binary data for stored fields. This class uses java.util.zip.Deflater and Inflater classes to compress and decompress.

Method Summary
`static byte[]` | `compress(byte[] value)` Compresses all bytes in the array, with default BEST_COMPRESSION level
`static byte[]` | `compress(byte[] value, int offset, int length)` Compresses the specified byte range, with default BEST_COMPRESSION level
`static byte[]` | `compress(byte[] value, int offset, int length, int compressionLevel)` Compresses the specified byte range using the specified compressionLevel (constants are defined in java.util.zip.Deflater).
`static byte[]` | `compressString(String value)` Compresses the String value, with default BEST_COMPRESSION level
`static byte[]` | `compressString(String value, int compressionLevel)` Compresses the String value using the specified compressionLevel (constants are defined in java.util.zip.Deflater).
`static byte[]` | `decompress(byte[] value)` Decompress the byte array previously returned by compress
`static String` | `decompressString(byte[] value)` Decompress the byte array previously returned by compressString back into a String

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Method Detail

### compress

    public static byte[] compress(byte[] value,
                                  int offset,
                                  int length,
                                  int compressionLevel)

  Compresses the specified byte range using the specified compressionLevel (constants are defined in java.util.zip.Deflater).

### compress

    public static byte[] compress(byte[] value,
                                  int offset,
                                  int length)

  Compresses the specified byte range, with default BEST_COMPRESSION level

### compress

    public static byte[] compress(byte[] value)

  Compresses all bytes in the array, with default BEST_COMPRESSION level

### compressString

    public static byte[] compressString(String value)

  Compresses the String value, with default BEST_COMPRESSION level

### compressString

    public static byte[] compressString(String value,
                                        int compressionLevel)

  Compresses the String value using the specified compressionLevel (constants are defined in java.util.zip.Deflater).

### decompress

    public static byte[] decompress(byte[] value)
                             throws DataFormatException

  Decompress the byte array previously returned by compress

  Throws:
    `DataFormatException`

### decompressString

    public static String decompressString(byte[] value)
                                   throws DataFormatException

  Decompress the byte array previously returned by compressString back into a String

  Throws:
    `DataFormatException`

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