Package org.apache.lucene.util.packed
Class MonotonicAppendingLongBuffer
java.lang.Object
org.apache.lucene.index.NumericDocValues
org.apache.lucene.util.LongValues
org.apache.lucene.util.packed.MonotonicAppendingLongBuffer
Utility class to buffer signed longs in memory, which is optimized for the
case where the sequence is monotonic, although it can encode any sequence of
arbitrary longs. It only supports appending.
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Field Summary
Fields inherited from class org.apache.lucene.index.NumericDocValues
EMPTY
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Constructor Summary
ConstructorsConstructorDescriptionCreate anMonotonicAppendingLongBuffer
with initialPageCount=16, pageSize=1024 and acceptableOverheadRatio=PackedInts.DEFAULT
MonotonicAppendingLongBuffer
(float acceptableOverheadRatio) Create anAppendingDeltaPackedLongBuffer
with initialPageCount=16, pageSize=1024MonotonicAppendingLongBuffer
(int initialPageCount, int pageSize, float acceptableOverheadRatio) -
Method Summary
Modifier and TypeMethodDescriptionfinal void
add
(long l) Append a value to this buffer.void
freeze()
Pack all pending values in this buffer.final long
get
(long index) Get value atindex
.final int
get
(long index, long[] arr, int off, int len) Bulk get: read at least one and at mostlen
longs starting fromindex
intoarr[off:off+len]
and return the actual number of values that have been read.org.apache.lucene.util.packed.AbstractAppendingLongBuffer.Iterator
iterator()
Return an iterator over the values of this buffer.long
Return the number of bytes used by this instance.final long
size()
Get the number of values that have been added to the buffer.Methods inherited from class org.apache.lucene.util.LongValues
get
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Constructor Details
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MonotonicAppendingLongBuffer
public MonotonicAppendingLongBuffer(int initialPageCount, int pageSize, float acceptableOverheadRatio) - Parameters:
initialPageCount
- the initial number of pagespageSize
- the size of a single pageacceptableOverheadRatio
- an acceptable overhead ratio per value
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MonotonicAppendingLongBuffer
public MonotonicAppendingLongBuffer()Create anMonotonicAppendingLongBuffer
with initialPageCount=16, pageSize=1024 and acceptableOverheadRatio=PackedInts.DEFAULT
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MonotonicAppendingLongBuffer
public MonotonicAppendingLongBuffer(float acceptableOverheadRatio) Create anAppendingDeltaPackedLongBuffer
with initialPageCount=16, pageSize=1024
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Method Details
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ramBytesUsed
public long ramBytesUsed()Return the number of bytes used by this instance. -
size
public final long size()Get the number of values that have been added to the buffer. -
add
public final void add(long l) Append a value to this buffer. -
get
public final long get(long index) Description copied from class:LongValues
Get value atindex
.- Specified by:
get
in classLongValues
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get
public final int get(long index, long[] arr, int off, int len) Bulk get: read at least one and at mostlen
longs starting fromindex
intoarr[off:off+len]
and return the actual number of values that have been read. -
iterator
public org.apache.lucene.util.packed.AbstractAppendingLongBuffer.Iterator iterator()Return an iterator over the values of this buffer. -
freeze
public void freeze()Pack all pending values in this buffer. Subsequent calls toadd(long)
will fail.
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