Package org.apache.pdfbox.filter
Class LZWFilter
- java.lang.Object
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- org.apache.pdfbox.filter.Filter
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- org.apache.pdfbox.filter.LZWFilter
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public class LZWFilter extends Filter
This is the filter used for the LZWDecode filter.- Author:
- Ben Litchfield, Tilman Hausherr
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Field Summary
Fields Modifier and Type Field Description static long
CLEAR_TABLE
The LZW clear table code.static long
EOD
The LZW end of data code.-
Fields inherited from class org.apache.pdfbox.filter.Filter
SYSPROP_DEFLATELEVEL
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Constructor Summary
Constructors Constructor Description LZWFilter()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description DecodeResult
decode(java.io.InputStream encoded, java.io.OutputStream decoded, COSDictionary parameters, int index)
Decodes data, producing the original non-encoded data.protected void
encode(java.io.InputStream rawData, java.io.OutputStream encoded, COSDictionary parameters)
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Methods inherited from class org.apache.pdfbox.filter.Filter
decode, encode, findImageReader, getCompressionLevel, getDecodeParams
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Field Detail
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CLEAR_TABLE
public static final long CLEAR_TABLE
The LZW clear table code.- See Also:
- Constant Field Values
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EOD
public static final long EOD
The LZW end of data code.- See Also:
- Constant Field Values
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Method Detail
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decode
public DecodeResult decode(java.io.InputStream encoded, java.io.OutputStream decoded, COSDictionary parameters, int index) throws java.io.IOException
Decodes data, producing the original non-encoded data.- Specified by:
decode
in classFilter
- Parameters:
encoded
- the encoded byte streamdecoded
- the stream where decoded data will be writtenparameters
- the parameters used for decodingindex
- the index to the filter being decoded- Returns:
- repaired parameters dictionary, or the original parameters dictionary
- Throws:
java.io.IOException
- if the stream cannot be decoded
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encode
protected void encode(java.io.InputStream rawData, java.io.OutputStream encoded, COSDictionary parameters) throws java.io.IOException
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