Package org.apache.lucene.codecs

Class StoredFieldsWriter.MergeVisitor

java.lang.Object

org.apache.lucene.index.StoredFieldVisitor

org.apache.lucene.codecs.StoredFieldsWriter.MergeVisitor

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();
 }
 

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.index.StoredFieldVisitor

StoredFieldVisitor.Status

Constructor Summary

Constructors

Constructor	Description
MergeVisitor(MergeState mergeState, int readerIndex)	Create new merge visitor.

Method Summary

Modifier and Type	Method	Description
void	binaryField(FieldInfo fieldInfo, byte[] value)	Process a binary field.
void	binaryField(FieldInfo fieldInfo, DataInput value, int length)	Expert: Process a binary field directly from the DataInput.
void	doubleField(FieldInfo fieldInfo, double value)	Process a double numeric field.
void	floatField(FieldInfo fieldInfo, float value)	Process a float numeric field.
void	intField(FieldInfo fieldInfo, int value)	Process a int numeric field.
void	longField(FieldInfo fieldInfo, long value)	Process a long numeric field.
StoredFieldVisitor.Status	needsField(FieldInfo fieldInfo)	Hook before processing a field.
void	stringField(FieldInfo fieldInfo, String value)	Process a string field.

Methods inherited from class java.lang.Object

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

Constructor Detail

MergeVisitor

public MergeVisitor(MergeState mergeState,
                    int readerIndex)

Create new merge visitor.

Method Detail

binaryField

public void binaryField(FieldInfo fieldInfo,
                        DataInput value,
                        int length)
                 throws IOException

Description copied from class: StoredFieldVisitor

Expert: Process a binary field directly from the DataInput. Implementors of this method must read length bytes from the given DataInput. The default implementation reads all byes in a newly created byte array and calls StoredFieldVisitor.binaryField(FieldInfo, byte[]).

Overrides:

binaryField in class StoredFieldVisitor

value - newly allocated byte array with the binary contents.

Throws:

IOException

binaryField

public void binaryField(FieldInfo fieldInfo,
                        byte[] value)
                 throws IOException

Description copied from class: StoredFieldVisitor

Process a binary field.

Overrides:

binaryField in class StoredFieldVisitor

value - newly allocated byte array with the binary contents.

Throws:

IOException

stringField

public void stringField(FieldInfo fieldInfo,
                        String value)
                 throws IOException

Description copied from class: StoredFieldVisitor

Process a string field.

Overrides:

stringField in class StoredFieldVisitor

Throws:

IOException

intField

public void intField(FieldInfo fieldInfo,
                     int value)
              throws IOException

Description copied from class: StoredFieldVisitor

Process a int numeric field.

Overrides:

intField in class StoredFieldVisitor

Throws:

IOException

longField

public void longField(FieldInfo fieldInfo,
                      long value)
               throws IOException

Description copied from class: StoredFieldVisitor

Process a long numeric field.

Overrides:

longField in class StoredFieldVisitor

Throws:

IOException

floatField

public void floatField(FieldInfo fieldInfo,
                       float value)
                throws IOException

Description copied from class: StoredFieldVisitor

Process a float numeric field.

Overrides:

floatField in class StoredFieldVisitor

Throws:

IOException

doubleField

public void doubleField(FieldInfo fieldInfo,
                        double value)
                 throws IOException

Description copied from class: StoredFieldVisitor

Process a double numeric field.

Overrides:

doubleField in class StoredFieldVisitor

Throws:

IOException

needsField

public StoredFieldVisitor.Status needsField(FieldInfo fieldInfo)
                                     throws IOException

Description copied from class: StoredFieldVisitor

Hook before processing a field. Before a field is processed, this method is invoked so that subclasses can return a StoredFieldVisitor.Status representing whether they need that particular field or not, or to stop processing entirely.

Specified by:

needsField in class StoredFieldVisitor

Throws:

IOException