gate.creole.annic.apache.lucene.index
Class Term

java.lang.Object
  gate.creole.annic.apache.lucene.index.Term

All Implemented Interfaces:

Serializable, Comparable

public final class Term
extends Object
implements Comparable, Serializable

A Term represents a word from text. This is the unit of search. It is composed of two elements, the text of the word, as a string, and the name of the field that the text occured in, an interned string. Note that terms may represent more than words from text fields, but also things like dates, email addresses, urls, etc.

See Also:

Serialized Form

Field Summary

(package private) String	field
(package private) String	text
(package private) String	type

Constructor Summary

Term(String fld, String txt)
Constructs a Term with the given field and text.

Term(String fld, String txt, boolean intern)

Term(String fld, String txt, String type)

Term(String fld, String txt, String type, boolean intern)

Method Summary

int	compareTo(Object other)
int	compareTo(Term other) Compares two terms, returning an integer which is less than zero iff this term belongs after the argument, equal zero iff this term is equal to the argument, and greater than zero iff this term belongs after the argument.
boolean	equals(Object o) Compares two terms, returning true iff they have the same field and text.
String	field() Returns the field of this term, an interned string.
int	hashCode() Combines the hashCode() of the field and the text.
int	indexCompareTo(Term other)
private boolean	isWildcharMatches(String text, String other)
private void	readObject(ObjectInputStream in)
(package private) void	set(String fld, String txt) Resets the field and text of a Term.
(package private) void	set(String fld, String text, String type)
String	text() Returns the text of this term.
String	toString()
String	type()

Methods inherited from class java.lang.Object

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

Field Detail

field

String field

text

String text

type

String type

Constructor Detail

Term

public Term(String fld,
            String txt)

Constructs a Term with the given field and text.

Term

public Term(String fld,
            String txt,
            String type)

Term

Term(String fld,
     String txt,
     String type,
     boolean intern)

Term

Term(String fld,
     String txt,
     boolean intern)

Method Detail

field

public final String field()

Returns the field of this term, an interned string. The field indicates the part of a document which this term came from.

type

public final String type()

text

public final String text()

Returns the text of this term. In the case of words, this is simply the text of the word. In the case of dates and other types, this is an encoding of the object as a string.

equals

public final boolean equals(Object o)

Compares two terms, returning true iff they have the same field and text.

Overrides:

equals in class Object

hashCode

public final int hashCode()

Combines the hashCode() of the field and the text.

Overrides:

hashCode in class Object

compareTo

public int compareTo(Object other)

Specified by:

compareTo in interface Comparable

compareTo

public final int compareTo(Term other)

Compares two terms, returning an integer which is less than zero iff this term belongs after the argument, equal zero iff this term is equal to the argument, and greater than zero iff this term belongs after the argument. The ordering of terms is first by field, then by text.

indexCompareTo

public final int indexCompareTo(Term other)

isWildcharMatches

private boolean isWildcharMatches(String text,
                                  String other)

set

final void set(String fld,
               String txt)

Resets the field and text of a Term.

set

final void set(String fld,
               String text,
               String type)

toString

public final String toString()

Overrides:

toString in class Object

readObject

private void readObject(ObjectInputStream in)
                 throws IOException,
                        ClassNotFoundException

Throws:

IOException

ClassNotFoundException