org.apache.lucene.analysis.reverse
public final class ReverseStringFilter extends org.apache.lucene.analysis.TokenFilter
If marker
is supplied, then tokens will be also prepended by
that character. For example, with a marker of \u0001, "country" =>
"\u0001yrtnuoc". This is useful when implementing efficient leading
wildcards search.
Modifier and Type | Field and Description |
---|---|
static char |
INFORMATION_SEPARATOR_MARKER
Example marker character: U+001F (INFORMATION SEPARATOR ONE)
|
static char |
PUA_EC00_MARKER
Example marker character: U+EC00 (PRIVATE USE AREA: EC00)
|
static char |
RTL_DIRECTION_MARKER
Example marker character: U+200F (RIGHT-TO-LEFT MARK)
|
static char |
START_OF_HEADING_MARKER
Example marker character: U+0001 (START OF HEADING)
|
Constructor and Description |
---|
ReverseStringFilter(org.apache.lucene.analysis.TokenStream in)
Create a new ReverseStringFilter that reverses all tokens in the
supplied
TokenStream . |
ReverseStringFilter(org.apache.lucene.analysis.TokenStream in,
char marker)
Create a new ReverseStringFilter that reverses and marks all tokens in the
supplied
TokenStream . |
Modifier and Type | Method and Description |
---|---|
boolean |
incrementToken() |
static void |
reverse(char[] buffer) |
static void |
reverse(char[] buffer,
int len) |
static void |
reverse(char[] buffer,
int start,
int len) |
static java.lang.String |
reverse(java.lang.String input) |
getOnlyUseNewAPI, next, next, setOnlyUseNewAPI
addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, restoreState, toString
public static final char START_OF_HEADING_MARKER
public static final char INFORMATION_SEPARATOR_MARKER
public static final char PUA_EC00_MARKER
public static final char RTL_DIRECTION_MARKER
public ReverseStringFilter(org.apache.lucene.analysis.TokenStream in)
TokenStream
.
The reversed tokens will not be marked.
in
- TokenStream
to filterpublic ReverseStringFilter(org.apache.lucene.analysis.TokenStream in, char marker)
TokenStream
.
The reversed tokens will be prepended (marked) by the marker
character.
in
- TokenStream
to filtermarker
- A character used to mark reversed tokenspublic boolean incrementToken() throws java.io.IOException
incrementToken
in class org.apache.lucene.analysis.TokenStream
java.io.IOException
public static java.lang.String reverse(java.lang.String input)
public static void reverse(char[] buffer)
public static void reverse(char[] buffer, int len)
public static void reverse(char[] buffer, int start, int len)
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