Package org.apache.lucene.codecs
Class StoredFieldsWriter.MergeVisitor
- java.lang.Object
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- org.apache.lucene.index.StoredFieldVisitor
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- org.apache.lucene.codecs.StoredFieldsWriter.MergeVisitor
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- Enclosing class:
- StoredFieldsWriter
protected class StoredFieldsWriter.MergeVisitor extends StoredFieldVisitor
A visitor that adds every field it sees.Use like this:
MergeVisitor visitor = new MergeVisitor(mergeState, readerIndex); for (...) { startDocument(); storedFieldsReader.document(docID, visitor); finishDocument(); }
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.lucene.index.StoredFieldVisitor
StoredFieldVisitor.Status
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Constructor Summary
Constructors Constructor Description MergeVisitor(MergeState mergeState, int readerIndex)Create new merge visitor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidbinaryField(FieldInfo fieldInfo, byte[] value)Process a binary field.voidbinaryField(FieldInfo fieldInfo, DataInput value, int length)Expert: Process a binary field directly from theDataInput.voiddoubleField(FieldInfo fieldInfo, double value)Process a double numeric field.voidfloatField(FieldInfo fieldInfo, float value)Process a float numeric field.voidintField(FieldInfo fieldInfo, int value)Process a int numeric field.voidlongField(FieldInfo fieldInfo, long value)Process a long numeric field.StoredFieldVisitor.StatusneedsField(FieldInfo fieldInfo)Hook before processing a field.voidstringField(FieldInfo fieldInfo, String value)Process a string field.
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Constructor Detail
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MergeVisitor
public MergeVisitor(MergeState mergeState, int readerIndex)
Create new merge visitor.
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Method Detail
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binaryField
public void binaryField(FieldInfo fieldInfo, DataInput value, int length) throws IOException
Description copied from class:StoredFieldVisitorExpert: Process a binary field directly from theDataInput. Implementors of this method must readlengthbytes from the givenDataInput. The default implementation reads all byes in a newly created byte array and callsStoredFieldVisitor.binaryField(FieldInfo, byte[]).- Overrides:
binaryFieldin classStoredFieldVisitorvalue- newly allocated byte array with the binary contents.- Throws:
IOException
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binaryField
public void binaryField(FieldInfo fieldInfo, byte[] value) throws IOException
Description copied from class:StoredFieldVisitorProcess a binary field.- Overrides:
binaryFieldin classStoredFieldVisitorvalue- newly allocated byte array with the binary contents.- Throws:
IOException
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stringField
public void stringField(FieldInfo fieldInfo, String value) throws IOException
Description copied from class:StoredFieldVisitorProcess a string field.- Overrides:
stringFieldin classStoredFieldVisitor- Throws:
IOException
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intField
public void intField(FieldInfo fieldInfo, int value) throws IOException
Description copied from class:StoredFieldVisitorProcess a int numeric field.- Overrides:
intFieldin classStoredFieldVisitor- Throws:
IOException
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longField
public void longField(FieldInfo fieldInfo, long value) throws IOException
Description copied from class:StoredFieldVisitorProcess a long numeric field.- Overrides:
longFieldin classStoredFieldVisitor- Throws:
IOException
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floatField
public void floatField(FieldInfo fieldInfo, float value) throws IOException
Description copied from class:StoredFieldVisitorProcess a float numeric field.- Overrides:
floatFieldin classStoredFieldVisitor- Throws:
IOException
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doubleField
public void doubleField(FieldInfo fieldInfo, double value) throws IOException
Description copied from class:StoredFieldVisitorProcess a double numeric field.- Overrides:
doubleFieldin classStoredFieldVisitor- Throws:
IOException
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needsField
public StoredFieldVisitor.Status needsField(FieldInfo fieldInfo) throws IOException
Description copied from class:StoredFieldVisitorHook before processing a field. Before a field is processed, this method is invoked so that subclasses can return aStoredFieldVisitor.Statusrepresenting whether they need that particular field or not, or to stop processing entirely.- Specified by:
needsFieldin classStoredFieldVisitor- Throws:
IOException
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