Class StoredFieldVisitor

Expert: Provides a low-level means of accessing the stored field values in an index. See Document(Int32, 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 Document(Int32).

This is a Lucene.NET EXPERIMENTAL API, use at your own risk
Inheritance
System.Object
StoredFieldVisitor
DocumentStoredFieldVisitor
Namespace: Lucene.Net.Index
Assembly: Lucene.Net.dll
Syntax
public abstract class StoredFieldVisitor : object

Constructors

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StoredFieldVisitor()

Sole constructor. (For invocation by subclass constructors, typically implicit.)

Declaration
protected StoredFieldVisitor()

Methods

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BinaryField(FieldInfo, Byte[])

Process a binary field.

Declaration
public virtual void BinaryField(FieldInfo fieldInfo, byte[] value)
Parameters
Type Name Description
FieldInfo fieldInfo
System.Byte[] value

newly allocated byte array with the binary contents.

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DoubleField(FieldInfo, Double)

Process a numeric field.

Declaration
public virtual void DoubleField(FieldInfo fieldInfo, double value)
Parameters
Type Name Description
FieldInfo fieldInfo
System.Double value
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Int32Field(FieldInfo, Int32)

Process a numeric field.

Declaration
public virtual void Int32Field(FieldInfo fieldInfo, int value)
Parameters
Type Name Description
FieldInfo fieldInfo
System.Int32 value
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Int64Field(FieldInfo, Int64)

Process a numeric field.

Declaration
public virtual void Int64Field(FieldInfo fieldInfo, long value)
Parameters
Type Name Description
FieldInfo fieldInfo
System.Int64 value
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NeedsField(FieldInfo)

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.

Declaration
public abstract StoredFieldVisitor.Status NeedsField(FieldInfo fieldInfo)
Parameters
Type Name Description
FieldInfo fieldInfo
Returns
Type Description
StoredFieldVisitor.Status
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SingleField(FieldInfo, Single)

Process a numeric field.

Declaration
public virtual void SingleField(FieldInfo fieldInfo, float value)
Parameters
Type Name Description
FieldInfo fieldInfo
System.Single value
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StringField(FieldInfo, String)

Process a field

Declaration
public virtual void StringField(FieldInfo fieldInfo, string value)
Parameters
Type Name Description
FieldInfo fieldInfo
System.String value