Package org.apache.lucene.util.packed
Class GrowableWriter
- java.lang.Object
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- org.apache.lucene.util.packed.PackedInts.Reader
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- org.apache.lucene.util.packed.PackedInts.Mutable
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- org.apache.lucene.util.packed.GrowableWriter
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- All Implemented Interfaces:
Accountable
public class GrowableWriter extends PackedInts.Mutable
ImplementsPackedInts.Mutable, but grows the bit count of the underlying packed ints on-demand.Beware that this class will accept to set negative values but in order to do this, it will grow the number of bits per value to 64.
@lucene.internal
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Field Summary
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Fields inherited from interface org.apache.lucene.util.Accountable
NULL_ACCOUNTABLE
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Constructor Summary
Constructors Constructor Description GrowableWriter(int startBitsPerValue, int valueCount, float acceptableOverheadRatio)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidclear()Sets all values to 0.voidfill(int fromIndex, int toIndex, long val)Fill the mutable fromfromIndex(inclusive) totoIndex(exclusive) withval.longget(int index)Get the long at the given index.intget(int index, long[] arr, int off, int len)Bulk get: read at least one and at mostlenlongs starting fromindexintoarr[off:off+len]and return the actual number of values that have been read.intgetBitsPerValue()PackedInts.MutablegetMutable()longramBytesUsed()Return the memory usage of this object in bytes.GrowableWriterresize(int newSize)voidset(int index, long value)Set the value at the given index in the array.intset(int index, long[] arr, int off, int len)Bulk set: set at least one and at mostlenlongs starting atoffinarrinto this mutable, starting atindex.intsize()-
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.lucene.util.Accountable
getChildResources
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Constructor Detail
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GrowableWriter
public GrowableWriter(int startBitsPerValue, int valueCount, float acceptableOverheadRatio)- Parameters:
startBitsPerValue- the initial number of bits per value, may grow depending on the datavalueCount- the number of valuesacceptableOverheadRatio- an acceptable overhead ratio
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Method Detail
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get
public long get(int index)
Description copied from class:PackedInts.ReaderGet the long at the given index. Behavior is undefined for out-of-range indices.- Specified by:
getin classPackedInts.Reader
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size
public int size()
- Specified by:
sizein classPackedInts.Reader- Returns:
- the number of values.
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getBitsPerValue
public int getBitsPerValue()
- Specified by:
getBitsPerValuein classPackedInts.Mutable- Returns:
- the number of bits used to store any given value. Note: This does not imply that
memory usage is
bitsPerValue * #valuesas implementations are free to use non-space-optimal packing of bits.
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getMutable
public PackedInts.Mutable getMutable()
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set
public void set(int index, long value)Description copied from class:PackedInts.MutableSet the value at the given index in the array.- Specified by:
setin classPackedInts.Mutable- Parameters:
index- where the value should be positioned.value- a value conforming to the constraints set by the array.
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clear
public void clear()
Description copied from class:PackedInts.MutableSets all values to 0.- Overrides:
clearin classPackedInts.Mutable
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resize
public GrowableWriter resize(int newSize)
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get
public int get(int index, long[] arr, int off, int len)Description copied from class:PackedInts.ReaderBulk get: read at least one and at mostlenlongs starting fromindexintoarr[off:off+len]and return the actual number of values that have been read.- Overrides:
getin classPackedInts.Reader
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set
public int set(int index, long[] arr, int off, int len)Description copied from class:PackedInts.MutableBulk set: set at least one and at mostlenlongs starting atoffinarrinto this mutable, starting atindex. Returns the actual number of values that have been set.- Overrides:
setin classPackedInts.Mutable
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fill
public void fill(int fromIndex, int toIndex, long val)Description copied from class:PackedInts.MutableFill the mutable fromfromIndex(inclusive) totoIndex(exclusive) withval.- Overrides:
fillin classPackedInts.Mutable
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ramBytesUsed
public long ramBytesUsed()
Description copied from interface:AccountableReturn the memory usage of this object in bytes. Negative values are illegal.
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