org.sindice.siren.analysis.attributes

Class NodeNumericTermAttributeImpl

java.lang.Object

org.apache.lucene.util.AttributeImpl

org.sindice.siren.analysis.attributes.NodeNumericTermAttributeImpl

All Implemented Interfaces:

Cloneable, org.apache.lucene.util.Attribute, NodeNumericTermAttribute

public class NodeNumericTermAttributeImpl
extends org.apache.lucene.util.AttributeImpl
implements NodeNumericTermAttribute

Default implementation of the NodeNumericTermAttribute.

Constructor Summary

Constructors

Constructor and Description
NodeNumericTermAttributeImpl()

Method Summary

Methods

Modifier and Type	Method and Description
void	clear()
void	copyTo(org.apache.lucene.util.AttributeImpl target)
org.apache.lucene.document.FieldType.NumericType	getNumericType() Return the numeric type of the value
int	getPrecisionStep() Returns the precision step
int	getShift() Returns the current shift value
int	getValueSize() Returns the value size in bits (32 for float, int; 64 for double, long)
boolean	incrementShift(org.apache.lucene.analysis.tokenattributes.CharTermAttribute termAtt) Increment the shift and generate the next token.
void	init(org.apache.lucene.document.FieldType.NumericType numericType, long value, int valueSize) Initialise this attribute
void	resetShift() Reset the current shift value to 0
void	setPrecisionStep(int precisionStep) Set the precision step

Methods inherited from class org.apache.lucene.util.AttributeImpl

clone, reflectAsString, reflectWith

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeNumericTermAttributeImpl

public NodeNumericTermAttributeImpl()

Method Detail

getNumericType

public org.apache.lucene.document.FieldType.NumericType getNumericType()

Description copied from interface: NodeNumericTermAttribute

Return the numeric type of the value

Specified by:

getNumericType in interface NodeNumericTermAttribute

getShift

public int getShift()

Description copied from interface: NodeNumericTermAttribute

Returns the current shift value

Undefined before first call to #incrementShift(CharTermAttribute, NumericType)

Specified by:

getShift in interface NodeNumericTermAttribute

resetShift

public void resetShift()

Description copied from interface: NodeNumericTermAttribute

Reset the current shift value to 0

Specified by:

resetShift in interface NodeNumericTermAttribute

getValueSize

public int getValueSize()

Description copied from interface: NodeNumericTermAttribute

Returns the value size in bits (32 for float, int; 64 for double, long)

Specified by:

getValueSize in interface NodeNumericTermAttribute

setPrecisionStep

public void setPrecisionStep(int precisionStep)

Description copied from interface: NodeNumericTermAttribute

Set the precision step

Specified by:

setPrecisionStep in interface NodeNumericTermAttribute

getPrecisionStep

public int getPrecisionStep()

Description copied from interface: NodeNumericTermAttribute

Returns the precision step

Specified by:

getPrecisionStep in interface NodeNumericTermAttribute

init

public void init(org.apache.lucene.document.FieldType.NumericType numericType,
        long value,
        int valueSize)

Description copied from interface: NodeNumericTermAttribute

Initialise this attribute

Specified by:

init in interface NodeNumericTermAttribute

incrementShift

public boolean incrementShift(org.apache.lucene.analysis.tokenattributes.CharTermAttribute termAtt)

Description copied from interface: NodeNumericTermAttribute

Increment the shift and generate the next token.

The original Lucene's NumericTokenStream.NumericTermAttribute implements TermToBytesRefAttribute. There is a conflict problem with the CharTermAttribute used in higher-level SIREn's analyzers, which also implements TermToBytesRefAttribute. The problem is that the AttributeSource is not able to choose between the two when requested an attribute implementing TermToBytesRefAttribute, e.g., in TermsHashPerField.

The current solution is to fill the BytesRef attribute of the CharTermAttribute with the encoded numeric value.

Specified by:

incrementShift in interface NodeNumericTermAttribute

Returns:

True if there are still tokens, false if we reach the end of the stream.

clear

public void clear()

Specified by:

clear in class org.apache.lucene.util.AttributeImpl

copyTo

public void copyTo(org.apache.lucene.util.AttributeImpl target)

Specified by:

copyTo in class org.apache.lucene.util.AttributeImpl