com.esri.gpt.catalog.lucene
Class DoubleField

java.lang.Object
  com.esri.gpt.catalog.lucene.DatastoreField
      com.esri.gpt.catalog.lucene.DoubleField

public class DoubleField
extends DatastoreField

A non-tokenized field that allows for Double value comparison.

Field Summary

protected static int

DEFAULT_PRECISION The default storage precision = 8

Constructor Summary

protected

DoubleField(String name, int precision) Constructs with a supplied name and precision.

Method Summary

protected static Double	doubleFromIndexableString(String value, int precision) Reverts an indexable String back to a double value.
protected static String	doubleToIndexableString(Double value, int precision) Converts a double value to a String that can be indexed for search.
protected int	getPrecision() Gets the storage precision.
protected Fieldable	makeFieldable(Object value) Makes the fieldable to index.
protected Query	makeRangeQuery(String literalLowerValue, String literalUpperValue, boolean lowerBoundaryIsInclusive, boolean upperBoundaryIsInclusive) Makes a range query.
protected String	makeValueToQuery(String value, boolean isLowerBoundary, boolean isUpperBoundary) Makes the value to query.
protected Object	makeValueToReturn(String storedValue) Makes the value to return in the query result.
protected int	sortFieldType() Returns the sort field type.

Methods inherited from class com.esri.gpt.catalog.lucene.DatastoreField

appendForWrite, getIndexingOption, getName, getStorageOption, getTermVectorOption, setIndexingOption, setName, setStorageOption, setTermVectorOption

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_PRECISION

protected static final int DEFAULT_PRECISION

The default storage precision = 8

See Also:

Constant Field Values

Constructor Detail

DoubleField

protected DoubleField(String name,
                      int precision)

Constructs with a supplied name and precision.

Parameters:

name - the field name

precision - the storage precision

Method Detail

getPrecision

protected int getPrecision()

Gets the storage precision.

Returns:

the storage precision

doubleFromIndexableString

protected static Double doubleFromIndexableString(String value,
                                                  int precision)

Reverts an indexable String back to a double value.

Parameters:

value - the indexable string to revert

Returns:

the double value

doubleToIndexableString

protected static String doubleToIndexableString(Double value,
                                                int precision)

Converts a double value to a String that can be indexed for search.

Parameters:

value - the value to convert

Returns:

the indexable string

makeFieldable

protected Fieldable makeFieldable(Object value)

Makes the fieldable to index.

Overrides:

makeFieldable in class DatastoreField

Parameters:

value - the value

Returns:

the fieldable

makeRangeQuery

protected Query makeRangeQuery(String literalLowerValue,
                               String literalUpperValue,
                               boolean lowerBoundaryIsInclusive,
                               boolean upperBoundaryIsInclusive)
                        throws DiscoveryException

Makes a range query.

Overrides:

makeRangeQuery in class DatastoreField

Parameters:

literalLowerValue - the literal lower boundary value

literalUpperValue - the literal upper boundary value

lowerBoundaryIsInclusive - (>= versus >)

upperBoundaryIsInclusive - (<= versus <)

Returns:

the value to query

Throws:

DiscoveryException - if a supplied value cannot be converted

makeValueToQuery

protected String makeValueToQuery(String value,
                                  boolean isLowerBoundary,
                                  boolean isUpperBoundary)
                           throws DiscoveryException

Makes the value to query.
The value to query is derived from NumericUtils.doubleToPrefixCoded().

Overrides:

makeValueToQuery in class DatastoreField

Parameters:

value - to input query value

isLowerBoundary - true if this is a lower boundary of a range query

isUpperBoundary - true if this is a upper boundary of a range query

Returns:

the value to query

Throws:

DiscoveryException - if the supplied value cannot be converted

makeValueToReturn

protected Object makeValueToReturn(String storedValue)

Makes the value to return in the query result.
The value to return is derived from doubleFromIndexableString().

Overrides:

makeValueToReturn in class DatastoreField

Parameters:

storedValue - the value stored within the Lucene document

Returns:

the associated object value

sortFieldType

protected int sortFieldType()

Returns the sort field type.

Overrides:

sortFieldType in class DatastoreField

Returns:

the sort field type (SortField.DOUBLE)