Class PackOutputStream
- java.lang.Object
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- java.io.OutputStream
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- org.eclipse.jgit.internal.storage.io.CancellableDigestOutputStream
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- org.eclipse.jgit.internal.storage.pack.PackOutputStream
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- All Implemented Interfaces:
java.io.Closeable
,java.io.Flushable
,java.lang.AutoCloseable
public final class PackOutputStream extends CancellableDigestOutputStream
Custom output stream to supportPackWriter
.
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Field Summary
Fields Modifier and Type Field Description private byte[]
copyBuffer
private byte[]
headerBuffer
private boolean
ofsDelta
private PackWriter
packWriter
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Fields inherited from class org.eclipse.jgit.internal.storage.io.CancellableDigestOutputStream
BYTES_TO_WRITE_BEFORE_CANCEL_CHECK
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Constructor Summary
Constructors Constructor Description PackOutputStream(ProgressMonitor writeMonitor, java.io.OutputStream out, PackWriter pw)
Initialize a pack output stream.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description (package private) void
endObject()
byte[]
getCopyBuffer()
Get a temporary buffer writers can use to copy data with.private static int
objectHeader(long len, int type, byte[] buf)
private static int
ofsDelta(long diff, byte[] buf, int p)
private static int
ofsDeltaVarIntLength(long v)
(package private) void
writeFileHeader(int version, long objectCount)
void
writeHeader(ObjectToPack otp, long rawLength)
Commits the object header onto the stream.void
writeObject(ObjectToPack otp)
Write one object.-
Methods inherited from class org.eclipse.jgit.internal.storage.io.CancellableDigestOutputStream
flush, getDigest, getWriteMonitor, length, write, write
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Field Detail
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packWriter
private final PackWriter packWriter
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headerBuffer
private final byte[] headerBuffer
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copyBuffer
private final byte[] copyBuffer
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ofsDelta
private boolean ofsDelta
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Constructor Detail
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PackOutputStream
public PackOutputStream(ProgressMonitor writeMonitor, java.io.OutputStream out, PackWriter pw)
Initialize a pack output stream.This constructor is exposed to support debugging the JGit library only. Application or storage level code should not create a PackOutputStream, instead use
PackWriter
, and let the writer create the stream.- Parameters:
writeMonitor
- monitor to update on object output progress.out
- target stream to receive all object contents.pw
- packer that is going to perform the output.
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Method Detail
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writeFileHeader
final void writeFileHeader(int version, long objectCount) throws java.io.IOException
- Throws:
java.io.IOException
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writeObject
public final void writeObject(ObjectToPack otp) throws java.io.IOException
Write one object. If the object was already written, this method does nothing and returns quickly. This case occurs whenever an object was written out of order in order to ensure the delta base occurred before the object that needs it.- Parameters:
otp
- the object to write.- Throws:
java.io.IOException
- the object cannot be read from the object reader, or the output stream is no longer accepting output. Caller must examine the type of exception and possibly its message to distinguish between these cases.
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writeHeader
public final void writeHeader(ObjectToPack otp, long rawLength) throws java.io.IOException
Commits the object header onto the stream.Once the header has been written, the object representation must be fully output, or packing must abort abnormally.
- Parameters:
otp
- the object to pack. Header information is obtained.rawLength
- number of bytes of the inflated content. For an object that is in whole object format, this is the same as the object size. For an object that is in a delta format, this is the size of the inflated delta instruction stream.- Throws:
java.io.IOException
- the underlying stream refused to accept the header.
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objectHeader
private static final int objectHeader(long len, int type, byte[] buf)
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ofsDelta
private static final int ofsDelta(long diff, byte[] buf, int p)
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ofsDeltaVarIntLength
private static final int ofsDeltaVarIntLength(long v)
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getCopyBuffer
public final byte[] getCopyBuffer()
Get a temporary buffer writers can use to copy data with.- Returns:
- a temporary buffer writers can use to copy data with.
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endObject
void endObject()
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