Class FieldComparator
- java.lang.Object
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- org.apache.solr.client.solrj.io.comp.FieldComparator
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- All Implemented Interfaces:
Serializable
,Comparator<Tuple>
,StreamComparator
,Expressible
public class FieldComparator extends Object implements StreamComparator
An equality field Comparator which compares a field of two Tuples and determines sort order.- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description FieldComparator(String leftFieldName, String rightFieldName, ComparatorOrder order)
FieldComparator(String fieldName, ComparatorOrder order)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description StreamComparator
append(StreamComparator other)
int
compare(Tuple leftTuple, Tuple rightTuple)
FieldComparator
copyAliased(Map<String,String> aliases)
String
getLeftFieldName()
ComparatorOrder
getOrder()
String
getRightFieldName()
boolean
hasDifferentFieldNames()
boolean
isDerivedFrom(StreamComparator base)
void
setLeftFieldName(String leftFieldName)
void
setRightFieldName(String rightFieldName)
Explanation
toExplanation(StreamFactory factory)
Returns an explanation about the stream objectStreamExpressionParameter
toExpression(StreamFactory factory)
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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 java.util.Comparator
equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong
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Constructor Detail
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FieldComparator
public FieldComparator(String fieldName, ComparatorOrder order)
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FieldComparator
public FieldComparator(String leftFieldName, String rightFieldName, ComparatorOrder order)
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Method Detail
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setLeftFieldName
public void setLeftFieldName(String leftFieldName)
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getLeftFieldName
public String getLeftFieldName()
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setRightFieldName
public void setRightFieldName(String rightFieldName)
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getRightFieldName
public String getRightFieldName()
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getOrder
public ComparatorOrder getOrder()
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hasDifferentFieldNames
public boolean hasDifferentFieldNames()
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toExpression
public StreamExpressionParameter toExpression(StreamFactory factory)
- Specified by:
toExpression
in interfaceExpressible
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toExplanation
public Explanation toExplanation(StreamFactory factory) throws IOException
Description copied from interface:Expressible
Returns an explanation about the stream object- Specified by:
toExplanation
in interfaceExpressible
- Parameters:
factory
- Stream factory for this, contains information about the function name- Returns:
- Explanation about this stream object containing explanations of any child stream objects
- Throws:
IOException
- throw on any error
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compare
public int compare(Tuple leftTuple, Tuple rightTuple)
- Specified by:
compare
in interfaceComparator<Tuple>
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isDerivedFrom
public boolean isDerivedFrom(StreamComparator base)
- Specified by:
isDerivedFrom
in interfaceStreamComparator
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copyAliased
public FieldComparator copyAliased(Map<String,String> aliases)
- Specified by:
copyAliased
in interfaceStreamComparator
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append
public StreamComparator append(StreamComparator other)
- Specified by:
append
in interfaceStreamComparator
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