StoredFieldVisitor (Jackrabbit Oak 1.78.0 API)

java.lang.Object
- org.apache.lucene.index.StoredFieldVisitor

Direct Known Subclasses:

DocumentStoredFieldVisitor
```
public abstract class StoredFieldVisitor
extends Object
```
Expert: provides a low-level means of accessing the stored field values in an index. See IndexReader.document(int, StoredFieldVisitor).
NOTE: a StoredFieldVisitor implementation should not try to load or visit other stored documents in the same reader because the implementation of stored fields for most codecs is not reeentrant and you will see strange exceptions as a result.
See DocumentStoredFieldVisitor, which is a StoredFieldVisitor that builds the Document containing all stored fields. This is used by IndexReader.document(int).

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class StoredFieldVisitor.Status
Enumeration of possible return values for needsField(org.apache.lucene.index.FieldInfo).

Constructor Summary

Constructors
Modifier Constructor Description

protected StoredFieldVisitor()
Sole constructor.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`binaryField(FieldInfo fieldInfo, byte[] value)`	Process a binary field.
`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.
`abstract 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
- StoredFieldVisitor
```
protected StoredFieldVisitor()
```
  Sole constructor. (For invocation by subclass constructors, typically implicit.)

Method Detail

binaryField

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

Process a binary field.

Parameters:: value - newly allocated byte array with the binary contents.
Throws:: IOException

stringField

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

Process a string field

Throws:: IOException

intField

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

Process a int numeric field.

Throws:: IOException

longField

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

Process a long numeric field.

Throws:: IOException

floatField

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

Process a float numeric field.

Throws:: IOException

doubleField

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

Process a double numeric field.

Throws:: IOException

needsField
```
public abstract StoredFieldVisitor.Status needsField(FieldInfo fieldInfo)
                                              throws IOException
```
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.

Throws:

IOException