Package org.tmatesoft.svn.core.io.diff
Class SVNDiffInstruction
- java.lang.Object
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- org.tmatesoft.svn.core.io.diff.SVNDiffInstruction
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public class SVNDiffInstruction extends java.lang.Object
The SVNDiffInstruction class represents instructions used as delta applying rules.For now there are three types of copy instructions:
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COPY_FROM_SOURCE
: that is when bytes are copied from a source view (for example, existing revision of a file) to the target one. -
COPY_FROM_NEW_DATA
: new data bytes (e.g. new text) are copied to the target view. -
COPY_FROM_TARGET
: that is, when a sequence of bytes in the target must be repeated.
- Since:
- 1.2
- Version:
- 1.3
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Field Summary
Fields Modifier and Type Field Description static int
COPY_FROM_NEW_DATA
A type of an instruction that says that data must be copied from the new data to the target view.static int
COPY_FROM_SOURCE
A type of an instruction that says that data must be copied from the source view to the target one.static int
COPY_FROM_TARGET
A type of an instruction that says that data must be copied from the target view to the target itself.int
length
A length bytes to copy.int
offset
An offset in the source from where the bytes should be copied.int
type
A type of this instruction.
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Constructor Summary
Constructors Constructor Description SVNDiffInstruction()
Creates a new instruction object.SVNDiffInstruction(int t, int l, int o)
Creates a particular type of a diff instruction.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description java.lang.String
toString()
Gives a string representation of this object.static void
writeInt(java.nio.ByteBuffer os, int i)
Writes an integer to a byte buffer.static void
writeLong(java.nio.ByteBuffer os, long i)
Writes a long to a byte buffer.void
writeTo(java.nio.ByteBuffer target)
Wirtes this instruction to a byte buffer.
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Field Detail
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COPY_FROM_SOURCE
public static final int COPY_FROM_SOURCE
A type of an instruction that says that data must be copied from the source view to the target one.- See Also:
- Constant Field Values
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COPY_FROM_TARGET
public static final int COPY_FROM_TARGET
A type of an instruction that says that data must be copied from the target view to the target itself.- See Also:
- Constant Field Values
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COPY_FROM_NEW_DATA
public static final int COPY_FROM_NEW_DATA
A type of an instruction that says that data must be copied from the new data to the target view.- See Also:
- Constant Field Values
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type
public int type
A type of this instruction.
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length
public int length
A length bytes to copy.
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offset
public int offset
An offset in the source from where the bytes should be copied. Instruction offsets are relative to the bounds of views, i.e. a source/target view is a window of bytes (specified in a concrete diff window) in the source/target stream (this can be a file, a buffer).
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Constructor Detail
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SVNDiffInstruction
public SVNDiffInstruction(int t, int l, int o)
Creates a particular type of a diff instruction. Instruction offsets are relative to the bounds of views, i.e. a source/target view is a window of bytes (specified in a concrete diff window) in the source/target stream (this can be a file, a buffer).- Parameters:
t
- a type of an instructionl
- a number of bytes to copyo
- an offset in the source (which may be a source or a target view, or a new data stream) from where the bytes are to be copied- See Also:
SVNDiffWindow
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SVNDiffInstruction
public SVNDiffInstruction()
Creates a new instruction object. It's the instruction for the empty contents file.
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Method Detail
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toString
public java.lang.String toString()
Gives a string representation of this object.- Overrides:
toString
in classjava.lang.Object
- Returns:
- a string representation of this object
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writeTo
public void writeTo(java.nio.ByteBuffer target)
Wirtes this instruction to a byte buffer.- Parameters:
target
- a byte buffer to write to
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writeInt
public static void writeInt(java.nio.ByteBuffer os, int i)
Writes an integer to a byte buffer.- Parameters:
os
- a byte buffer to write toi
- an integer to write
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writeLong
public static void writeLong(java.nio.ByteBuffer os, long i)
Writes a long to a byte buffer.- Parameters:
os
- a byte buffer to write toi
- a long number to write
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