Class ZCompressorInputStream
- java.lang.Object
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- java.io.InputStream
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- org.apache.commons.compress.compressors.CompressorInputStream
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- org.apache.commons.compress.compressors.lzw.LZWInputStream
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- org.apache.commons.compress.compressors.z.ZCompressorInputStream
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- All Implemented Interfaces:
java.io.Closeable
,java.lang.AutoCloseable
,InputStreamStatistics
public class ZCompressorInputStream extends LZWInputStream
Input stream that decompresses .Z files.- Since:
- 1.7
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Field Summary
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Fields inherited from class org.apache.commons.compress.compressors.lzw.LZWInputStream
DEFAULT_CODE_SIZE, in, UNUSED_PREFIX
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Constructor Summary
Constructors Constructor Description ZCompressorInputStream(java.io.InputStream inputStream)
ZCompressorInputStream(java.io.InputStream inputStream, int memoryLimitInKb)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description protected int
addEntry(int previousCode, byte character)
Add a new entry to the dictionary.protected int
decompressNextSymbol()
Read the next code and expand it.static boolean
matches(byte[] signature, int length)
Checks if the signature matches what is expected for a Unix compress file.protected int
readNextCode()
Reads the next code from the stream.-
Methods inherited from class org.apache.commons.compress.compressors.lzw.LZWInputStream
addEntry, addRepeatOfPreviousCode, close, expandCodeToOutputStack, getClearCode, getCodeSize, getCompressedCount, getPrefix, getPrefixesLength, getTableSize, incrementCodeSize, initializeTables, initializeTables, read, read, resetCodeSize, resetPreviousCode, setClearCode, setCodeSize, setPrefix, setTableSize
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Methods inherited from class org.apache.commons.compress.compressors.CompressorInputStream
count, count, getBytesRead, getCount, getUncompressedCount, pushedBackBytes
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Methods inherited from class java.io.InputStream
available, mark, markSupported, nullInputStream, read, readAllBytes, readNBytes, readNBytes, reset, skip, transferTo
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.apache.commons.compress.utils.InputStreamStatistics
getUncompressedCount
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Constructor Detail
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ZCompressorInputStream
public ZCompressorInputStream(java.io.InputStream inputStream) throws java.io.IOException
- Throws:
java.io.IOException
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ZCompressorInputStream
public ZCompressorInputStream(java.io.InputStream inputStream, int memoryLimitInKb) throws java.io.IOException
- Throws:
java.io.IOException
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Method Detail
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matches
public static boolean matches(byte[] signature, int length)
Checks if the signature matches what is expected for a Unix compress file.- Parameters:
signature
- the bytes to checklength
- the number of bytes to check- Returns:
- true, if this stream is a Unix compress compressed stream, false otherwise
- Since:
- 1.9
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addEntry
protected int addEntry(int previousCode, byte character) throws java.io.IOException
Add a new entry to the dictionary.This method is only protected for technical reasons and is not part of Commons Compress' published API. It may change or disappear without warning.
- Specified by:
addEntry
in classLZWInputStream
- Parameters:
previousCode
- the previous codecharacter
- the next character to append- Returns:
- the new code
- Throws:
java.io.IOException
- on error
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decompressNextSymbol
protected int decompressNextSymbol() throws java.io.IOException
Read the next code and expand it.This method is only protected for technical reasons and is not part of Commons Compress' published API. It may change or disappear without warning.
- Specified by:
decompressNextSymbol
in classLZWInputStream
- Returns:
- the expanded next code, negative on EOF
- Throws:
java.io.IOException
- on error
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readNextCode
protected int readNextCode() throws java.io.IOException
Reads the next code from the stream.This method is only protected for technical reasons and is not part of Commons Compress' published API. It may change or disappear without warning.
- Overrides:
readNextCode
in classLZWInputStream
- Returns:
- the next code
- Throws:
java.io.IOException
- on error
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