object NoopStats extends GeoMesaStats
Stats implementation that will always return None
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Value Members
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def
close(): Unit
- Definition Classes
- NoopStats → Closeable → AutoCloseable
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def
getBounds(sft: SimpleFeatureType, filter: Filter = Filter.INCLUDE, exact: Boolean = false): ReferencedEnvelope
Get the bounds for data that will be returned for a query
Get the bounds for data that will be returned for a query
- sft
simple feature type
- filter
cql filter
- exact
rough estimate, or precise bounds. note: precise bounds will likely be expensive.
- returns
bounds
- Definition Classes
- GeoMesaStats
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def
getCount(sft: SimpleFeatureType, filter: Filter, exact: Boolean, queryHints: Hints): Option[Long]
Gets the number of features that will be returned for a query.
Gets the number of features that will be returned for a query. May return -1 if exact is false and estimate is unavailable.
- sft
simple feature type
- filter
cql filter
- exact
rough estimate, or precise count. note: precise count will likely be expensive.
- queryHints
query hints that should be used for query execution
- returns
count of features, if available - will always be Some if exact == true
- Definition Classes
- NoopStats → GeoMesaStats
-
def
getEnumeration[T](sft: SimpleFeatureType, attribute: String, filter: Filter, exact: Boolean): Option[EnumerationStat[T]]
Get an enumeration stat
Get an enumeration stat
- T
attribute type - must correspond to attribute binding
- sft
simple feature type
- attribute
attribute name to query
- filter
cql filter
- exact
rough estimates, or precise values. note: precise values will likely be expensive.
- Definition Classes
- NoopStats → GeoMesaStats
-
def
getFrequency[T](sft: SimpleFeatureType, attribute: String, precision: Int, filter: Filter, exact: Boolean): Option[Frequency[T]]
Get a frequency stat
Get a frequency stat
- T
attribute type - must correspond to attribute binding
- sft
simple feature type
- attribute
attribute name to query
- precision
precision of the estimate - @see org.locationtech.geomesa.utils.stats.Frequency
- filter
cql filter
- exact
rough estimates, or precise values. note: precise values will likely be expensive.
- Definition Classes
- NoopStats → GeoMesaStats
-
def
getHistogram[T](sft: SimpleFeatureType, attribute: String, bins: Int, min: T, max: T, filter: Filter, exact: Boolean): Option[Histogram[T]]
Get a histogram stat
Get a histogram stat
- T
attribute type - must correspond to attribute binding
- sft
simple feature type
- attribute
attribute name to query
- bins
number of buckets used to group values
- min
minimum value used to create the initial histogram buckets
- max
maximum value used to create the initial histogram buckets
- filter
cql filter
- exact
rough estimates, or precise values. note: precise values will likely be expensive.
- Definition Classes
- NoopStats → GeoMesaStats
-
def
getMinMax[T](sft: SimpleFeatureType, attribute: String, filter: Filter, exact: Boolean): Option[MinMax[T]]
Get the minimum and maximum values for the given attribute
Get the minimum and maximum values for the given attribute
- T
attribute type - must correspond to attribute binding
- sft
simple feature type
- attribute
attribute name to examine
- filter
cql filter
- exact
rough estimate, or precise values. note: precise values will likely be expensive.
- returns
mix/max values and overall cardinality. types will be consistent with the binding of the attribute
- Definition Classes
- NoopStats → GeoMesaStats
-
def
getSeqStat[T <: Stat](sft: SimpleFeatureType, queries: Seq[String], filter: Filter = Filter.INCLUDE, exact: Boolean = false): Seq[T]
Gets arbitrary stats for multiple queries
Gets arbitrary stats for multiple queries
- T
type bounds, must match stat query strings
- sft
simple feature type
- queries
stats strings
- filter
cql filter
- exact
rough estimate, or precise values. note: precise values will likely be expensive.
- Definition Classes
- GeoMesaStats
-
def
getStat[T <: Stat](sft: SimpleFeatureType, query: String, filter: Filter, exact: Boolean): Option[T]
Get arbitrary stats
Get arbitrary stats
- T
type bounds, must match stat query strings
- sft
simple feature type
- query
stats string
- filter
cql filter
- exact
rough estimate, or precise values. note: precise values will likely be expensive.
- returns
stats, if any
- Definition Classes
- NoopStats → GeoMesaStats
-
def
getTopK[T](sft: SimpleFeatureType, attribute: String, filter: Filter, exact: Boolean): Option[TopK[T]]
Get a top k stat
Get a top k stat
- T
attribute type - must correspond to attribute binding
- sft
simple feature type
- attribute
attribute name to query
- filter
cql filter
- exact
rough estimates, or precise values. note: precise values will likely be expensive.
- Definition Classes
- NoopStats → GeoMesaStats
-
def
getZ3Histogram(sft: SimpleFeatureType, geom: String, dtg: String, period: TimePeriod, bins: Int, filter: Filter, exact: Boolean): Option[Z3Histogram]
Get a Z3 histogram stat, where values are grouped based on combined geometry + date
Get a Z3 histogram stat, where values are grouped based on combined geometry + date
- sft
simple feature type
- geom
geometry attribute to query
- dtg
date attribute to query
- period
time period used to calculate bins for each value
- bins
number of buckets used to group values
- filter
cql filter
- exact
rough estimates, or precise values. note: precise values will likely be expensive.
- Definition Classes
- NoopStats → GeoMesaStats
-
val
writer: GeoMesaStatWriter
Gets a writer for updating stats
Gets a writer for updating stats
- Definition Classes
- NoopStats → GeoMesaStats