org.elasticsearch.index.fielddata

クラス IndexFieldData.XFieldComparatorSource

java.lang.Object

org.apache.lucene.search.FieldComparatorSource

org.elasticsearch.index.fielddata.IndexFieldData.XFieldComparatorSource

直系の既知のサブクラス:

BytesRefFieldComparatorSource, DoubleValuesComparatorSource, FloatValuesComparatorSource, LongValuesComparatorSource

含まれているインタフェース:

IndexFieldData<FD extends AtomicFieldData>

public abstract static class IndexFieldData.XFieldComparatorSource
extends org.apache.lucene.search.FieldComparatorSource

ネストされたクラスのサマリー

ネストされたクラス

修飾子とタイプ	クラスと説明
static class	IndexFieldData.XFieldComparatorSource.Nested Simple wrapper class around a filter that matches parent documents and a filter that matches child documents.

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
XFieldComparatorSource()

メソッドのサマリー

修飾子とタイプ	メソッドと説明
protected Object	missingObject(Object missingValue, boolean reversed) Return the missing object value according to the reduced type of the comparator.
Object	missingValue(boolean reversed) Return a missing value that is understandable by SortField.setMissingValue(Object).
abstract org.apache.lucene.search.SortField.Type	reducedType()
protected boolean	sortMissingFirst(Object missingValue) Whether missing values should be sorted first.
protected boolean	sortMissingLast(Object missingValue) Whether missing values should be sorted last, this is the default.

クラスから継承されたメソッド org.apache.lucene.search.FieldComparatorSource

newComparator

クラスから継承されたメソッド java.lang.Object

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

コンストラクタの詳細

XFieldComparatorSource

public XFieldComparatorSource()

メソッドの詳細

sortMissingFirst

protected final boolean sortMissingFirst(Object missingValue)

Whether missing values should be sorted first.

sortMissingLast

protected final boolean sortMissingLast(Object missingValue)

Whether missing values should be sorted last, this is the default.

missingObject

protected final Object missingObject(Object missingValue,
                                     boolean reversed)

Return the missing object value according to the reduced type of the comparator.

reducedType

public abstract org.apache.lucene.search.SortField.Type reducedType()

missingValue

public Object missingValue(boolean reversed)

Return a missing value that is understandable by SortField.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 return SortField.STRING_FIRST or SortField.STRING_LAST so that the coordinating node knows how to deal with null values.