Package org.apache.pdfbox.filter
Class LZWFilter
java.lang.Object
org.apache.pdfbox.filter.Filter
org.apache.pdfbox.filter.LZWFilter
This is the filter used for the LZWDecode filter.
- Author:
- Ben Litchfield, Tilman Hausherr
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final long
The LZW clear table code.static final long
The LZW end of data code.Fields inherited from class org.apache.pdfbox.filter.Filter
SYSPROP_DEFLATELEVEL
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptiondecode
(InputStream encoded, OutputStream decoded, COSDictionary parameters, int index) Decodes data, producing the original non-encoded data.protected void
encode
(InputStream rawData, OutputStream encoded, COSDictionary parameters) Methods inherited from class org.apache.pdfbox.filter.Filter
decode, encode, findImageReader, getCompressionLevel, getDecodeParams
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Field Details
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CLEAR_TABLE
public static final long CLEAR_TABLEThe LZW clear table code.- See Also:
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EOD
public static final long EODThe LZW end of data code.- See Also:
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Constructor Details
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LZWFilter
public LZWFilter()
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Method Details
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decode
public DecodeResult decode(InputStream encoded, OutputStream decoded, COSDictionary parameters, int index) throws 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:
IOException
- if the stream cannot be decoded
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encode
protected void encode(InputStream rawData, OutputStream encoded, COSDictionary parameters) throws IOException - Specified by:
encode
in classFilter
- Throws:
IOException
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