Class IndexFieldData.XFieldComparatorSource
- java.lang.Object
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- org.apache.lucene.search.FieldComparatorSource
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- org.elasticsearch.index.fielddata.IndexFieldData.XFieldComparatorSource
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- Direct Known Subclasses:
BytesRefFieldComparatorSource
,DoubleValuesComparatorSource
,FloatValuesComparatorSource
,LongValuesComparatorSource
- Enclosing interface:
- IndexFieldData<FD extends AtomicFieldData>
public abstract static class IndexFieldData.XFieldComparatorSource extends org.apache.lucene.search.FieldComparatorSource
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
IndexFieldData.XFieldComparatorSource.Nested
Simple wrapper class around a filter that matches parent documents and a filter that matches child documents.
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Field Summary
Fields Modifier and Type Field Description protected java.lang.Object
missingValue
protected IndexFieldData.XFieldComparatorSource.Nested
nested
protected MultiValueMode
sortMode
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Constructor Summary
Constructors Constructor Description XFieldComparatorSource(java.lang.Object missingValue, MultiValueMode sortMode, IndexFieldData.XFieldComparatorSource.Nested nested)
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Method Summary
Modifier and Type Method Description java.lang.Object
missingObject(java.lang.Object missingValue, boolean reversed)
Return the missing object value according to the reduced type of the comparator.java.lang.Object
missingValue(boolean reversed)
Return a missing value that is understandable bySortField.setMissingValue(Object)
.IndexFieldData.XFieldComparatorSource.Nested
nested()
abstract org.apache.lucene.search.SortField.Type
reducedType()
boolean
sortMissingFirst(java.lang.Object missingValue)
Whether missing values should be sorted first.boolean
sortMissingLast(java.lang.Object missingValue)
Whether missing values should be sorted last, this is the default.MultiValueMode
sortMode()
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Field Detail
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sortMode
protected final MultiValueMode sortMode
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missingValue
protected final java.lang.Object missingValue
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nested
protected final IndexFieldData.XFieldComparatorSource.Nested nested
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Constructor Detail
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XFieldComparatorSource
public XFieldComparatorSource(java.lang.Object missingValue, MultiValueMode sortMode, IndexFieldData.XFieldComparatorSource.Nested nested)
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Method Detail
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sortMode
public MultiValueMode sortMode()
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nested
public IndexFieldData.XFieldComparatorSource.Nested nested()
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sortMissingFirst
public final boolean sortMissingFirst(java.lang.Object missingValue)
Whether missing values should be sorted first.
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sortMissingLast
public final boolean sortMissingLast(java.lang.Object missingValue)
Whether missing values should be sorted last, this is the default.
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missingObject
public final java.lang.Object missingObject(java.lang.Object missingValue, boolean reversed)
Return the missing object value according to the reduced type of the comparator.
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reducedType
public abstract org.apache.lucene.search.SortField.Type reducedType()
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missingValue
public java.lang.Object missingValue(boolean reversed)
Return a missing value that is understandable bySortField.setMissingValue(Object)
. Most implementations return null because they already replace the value at the fielddata level. However this can't work in case of strings since there is no such thing as a string which compares greater than any other string, so in that case we need to returnSortField.STRING_FIRST
orSortField.STRING_LAST
so that the coordinating node knows how to deal with null values.
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