Package org.apache.lucene.document
Class CompressionTools
- java.lang.Object
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- org.apache.lucene.document.CompressionTools
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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.
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static byte[]
compress(byte[] value)
Compresses all bytes in the array, with default BEST_COMPRESSION levelstatic byte[]
compress(byte[] value, int offset, int length)
Compresses the specified byte range, with default BEST_COMPRESSION levelstatic 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 levelstatic 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 compressstatic String
decompressString(byte[] value)
Decompress the byte array previously returned by compressString back into a String
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Method Detail
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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).
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compress
public static byte[] compress(byte[] value, int offset, int length)
Compresses the specified byte range, with default BEST_COMPRESSION level
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compress
public static byte[] compress(byte[] value)
Compresses all bytes in the array, with default BEST_COMPRESSION level
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compressString
public static byte[] compressString(String value)
Compresses the String value, with default BEST_COMPRESSION level
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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).
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decompress
public static byte[] decompress(byte[] value) throws DataFormatException
Decompress the byte array previously returned by compress- Throws:
DataFormatException
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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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