Module org.apache.lucene.core
Package org.apache.lucene.util
Class RollingBuffer<T extends RollingBuffer.Resettable>
java.lang.Object
org.apache.lucene.util.RollingBuffer<T>
- Direct Known Subclasses:
TokenStreamToAutomaton.Positions
Acts like forever growing T[], but internally uses a circular buffer to reuse instances of T.
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Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionstatic interface
Implement to reset an instance -
Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
freeBefore
(int pos) get
(int pos) Get T instance for this absolute position; this is allowed to be arbitrarily far "in the future" but cannot be before the last freeBefore.int
Returns how many active positions are in the buffer.private int
getIndex
(int pos) int
Returns the maximum position looked up, or -1 if no position has been looked up since reset/init.private boolean
inBounds
(int pos) protected abstract T
void
reset()
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Field Details
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buffer
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nextWrite
private int nextWrite -
nextPos
private int nextPos -
count
private int count
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Constructor Details
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RollingBuffer
public RollingBuffer()
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Method Details
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newInstance
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reset
public void reset() -
inBounds
private boolean inBounds(int pos) -
getIndex
private int getIndex(int pos) -
get
Get T instance for this absolute position; this is allowed to be arbitrarily far "in the future" but cannot be before the last freeBefore. -
getMaxPos
public int getMaxPos()Returns the maximum position looked up, or -1 if no position has been looked up since reset/init. -
getBufferSize
public int getBufferSize()Returns how many active positions are in the buffer. -
freeBefore
public void freeBefore(int pos)
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