com.yahoo.prelude.query

Class RegExpItem

java.lang.Object

com.yahoo.prelude.query.Item

com.yahoo.prelude.query.SimpleTaggableItem

com.yahoo.prelude.query.SimpleIndexedItem

com.yahoo.prelude.query.TermItem

com.yahoo.prelude.query.RegExpItem

All Implemented Interfaces:

BlockItem, HasIndexItem, IndexedItem, TaggableItem, Cloneable

public class RegExpItem
extends TermItem

Match a field with the contained regular expression.

Author:

Steinar Knutsen

Nested Class Summary

Nested classes/interfaces inherited from class com.yahoo.prelude.query.Item

Item.ItemCreator, Item.ItemType

Field Summary

Fields

Modifier and Type	Field and Description
private String	expression
private Pattern	regexp

Fields inherited from class com.yahoo.prelude.query.Item

connectedBacklink, connectedItem, connectivity, DEFAULT_WEIGHT, explicitSignificance, significance, uniqueID

Constructor Summary

Constructors

Constructor and Description
RegExpItem(String indexName, boolean isFromQuery, String expression)

Method Summary

Modifier and Type	Method and Description
protected void	encodeThis(ByteBuffer buffer)
boolean	equals(Object obj) Returns whether this item is of the same class and contains the same state as the given item
String	getIndexedString() Return the searchable term contents of this item.
Item.ItemType	getItemType() Return the enumerated type of this item.
String	getName() Returns the name of this item
int	getNumWords()
String	getRawWord() Returns the raw form of the text leading to this term, exactly as received, including original casing
Pattern	getRegexp()
int	hashCode()
boolean	isStemmed()
boolean	isWords() Does this item represent "usual words"?
void	setValue(String expression) Sets the value of this item from a string.
String	stringValue() Returns the value of this term as a string
String	toString() Returns the canonical query language string of this item.

Methods inherited from class com.yahoo.prelude.query.TermItem

appendBodyString, disclose, encode, getOrigin, getSegmentingRule, getTermCount, isFromQuery, isNormalizable, setNormalizable, setOrigin, setSegmentingRule

Methods inherited from class com.yahoo.prelude.query.SimpleIndexedItem

appendIndexString, getIndexName, setIndexName

Methods inherited from class com.yahoo.prelude.query.SimpleTaggableItem

getConnectedItem, getConnectivity, getSignificance, getUniqueID, hasExplicitSignificance, hasUniqueID, setConnectivity, setExplicitSignificance, setSignificance, setUniqueID

Methods inherited from class com.yahoo.prelude.query.Item

addAnnotation, appendHeadingString, clone, getAnnotation, getBytes, getCode, getCreator, getLabel, getLanguage, getParent, getWeight, hasAnnotation, hasConnectivityBackLink, isFilter, isFromSpecialToken, isProtected, isRanked, isRoot, putBytes, putString, setCreator, setFilter, setFromSpecialToken, setHasUniqueID, setLabel, setLanguage, setParent, setPositionData, setProtected, setRanked, setWeight, shouldParenthize, usePositionData

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.yahoo.prelude.query.HasIndexItem

getIndexName

Field Detail

expression

private String expression

regexp

private Pattern regexp

Constructor Detail

RegExpItem

public RegExpItem(String indexName,
                  boolean isFromQuery,
                  String expression)

Method Detail

stringValue

public String stringValue()

Description copied from interface: BlockItem

Returns the value of this term as a string

isStemmed

public boolean isStemmed()

getNumWords

public int getNumWords()

setValue

public void setValue(String expression)

Description copied from class: TermItem

Sets the value of this item from a string.

Specified by:

setValue in class TermItem

getRawWord

public String getRawWord()

Description copied from class: TermItem

Returns the raw form of the text leading to this term, exactly as received, including original casing

Specified by:

getRawWord in interface BlockItem

Specified by:

getRawWord in class TermItem

isWords

public boolean isWords()

Description copied from interface: BlockItem

Does this item represent "usual words"?

Specified by:

isWords in interface BlockItem

Specified by:

isWords in class TermItem

getIndexedString

public String getIndexedString()

Description copied from interface: IndexedItem

Return the searchable term contents of this item.

Specified by:

getIndexedString in interface IndexedItem

Specified by:

getIndexedString in class SimpleIndexedItem

Returns:

a string representation of what is presumably stored in an index which will match this item

getItemType

public Item.ItemType getItemType()

Description copied from class: Item

Return the enumerated type of this item.

Specified by:

getItemType in class Item

getName

public String getName()

Description copied from class: Item

Returns the name of this item

Specified by:

getName in class Item

encodeThis

protected void encodeThis(ByteBuffer buffer)

Overrides:

encodeThis in class SimpleIndexedItem

toString

public String toString()

Description copied from class: Item

Returns the canonical query language string of this item.

The canonical language represent an item by the string

 ([itemName] [body])
 

where the body may recursively be other items.

TODO: Change the output query language into a canonical form of the input query language

Overrides:

toString in class Item

hashCode

public int hashCode()

Overrides:

hashCode in class SimpleIndexedItem

equals

public boolean equals(Object obj)

Description copied from class: Item

Returns whether this item is of the same class and contains the same state as the given item

Overrides:

equals in class SimpleIndexedItem

getRegexp

public Pattern getRegexp()