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java.lang.Objectorg.apache.lucene.util.AttributeSource
org.apache.lucene.analysis.TokenStream
org.apache.lucene.analysis.TokenFilter
org.apache.lucene.analysis.reverse.ReverseStringFilter
public final class ReverseStringFilter
Reverse token string, for example "country" => "yrtnuoc".
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.
You must specify the required Version
compatibility when creating ReverseStringFilter, or when using any of
its static methods:
| Nested Class Summary |
|---|
| Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource |
|---|
org.apache.lucene.util.AttributeSource.AttributeFactory, org.apache.lucene.util.AttributeSource.State |
| Field Summary | |
|---|---|
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) |
| Fields inherited from class org.apache.lucene.analysis.TokenFilter |
|---|
input |
| Constructor Summary | |
|---|---|
ReverseStringFilter(org.apache.lucene.analysis.TokenStream in)
Deprecated. use ReverseStringFilter(Version, TokenStream)
instead. This constructor will be removed in Lucene 4.0 |
|
ReverseStringFilter(org.apache.lucene.analysis.TokenStream in,
char marker)
Deprecated. use ReverseStringFilter(Version, TokenStream, char)
instead. This constructor will be removed in Lucene 4.0 |
|
ReverseStringFilter(org.apache.lucene.util.Version matchVersion,
org.apache.lucene.analysis.TokenStream in)
Create a new ReverseStringFilter that reverses all tokens in the supplied TokenStream. |
|
ReverseStringFilter(org.apache.lucene.util.Version matchVersion,
org.apache.lucene.analysis.TokenStream in,
char marker)
Create a new ReverseStringFilter that reverses and marks all tokens in the supplied TokenStream. |
|
| Method Summary | |
|---|---|
boolean |
incrementToken()
|
static void |
reverse(char[] buffer)
Deprecated. use reverse(Version, char[]) instead. This
method will be removed in Lucene 4.0 |
static void |
reverse(char[] buffer,
int len)
Deprecated. use reverse(Version, char[], int) instead. This
method will be removed in Lucene 4.0 |
static void |
reverse(char[] buffer,
int start,
int len)
Deprecated. use reverse(Version, char[], int, int) instead. This
method will be removed in Lucene 4.0 |
static String |
reverse(String input)
Deprecated. use reverse(Version, String) instead. This method
will be removed in Lucene 4.0 |
static void |
reverse(org.apache.lucene.util.Version matchVersion,
char[] buffer)
Reverses the given input buffer in-place |
static void |
reverse(org.apache.lucene.util.Version matchVersion,
char[] buffer,
int len)
Partially reverses the given input buffer in-place from offset 0 up to the given length. |
static void |
reverse(org.apache.lucene.util.Version matchVersion,
char[] buffer,
int start,
int len)
Partially reverses the given input buffer in-place from the given offset up to the given length. |
static String |
reverse(org.apache.lucene.util.Version matchVersion,
String input)
Reverses the given input string |
| Methods inherited from class org.apache.lucene.analysis.TokenFilter |
|---|
close, end, reset |
| Methods inherited from class org.apache.lucene.util.AttributeSource |
|---|
addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString |
| Methods inherited from class java.lang.Object |
|---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Field Detail |
|---|
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
| Constructor Detail |
|---|
@Deprecated public ReverseStringFilter(org.apache.lucene.analysis.TokenStream in)
ReverseStringFilter(Version, TokenStream)
instead. This constructor will be removed in Lucene 4.0
TokenStream.
The reversed tokens will not be marked.
in - TokenStream to filter
@Deprecated
public ReverseStringFilter(org.apache.lucene.analysis.TokenStream in,
char marker)
ReverseStringFilter(Version, TokenStream, char)
instead. This constructor will be removed in Lucene 4.0
TokenStream.
The reversed tokens will be prepended (marked) by the marker
character.
in - TokenStream to filtermarker - A character used to mark reversed tokens
public ReverseStringFilter(org.apache.lucene.util.Version matchVersion,
org.apache.lucene.analysis.TokenStream in)
TokenStream.
The reversed tokens will not be marked.
matchVersion - See abovein - TokenStream to filter
public ReverseStringFilter(org.apache.lucene.util.Version matchVersion,
org.apache.lucene.analysis.TokenStream in,
char marker)
TokenStream.
The reversed tokens will be prepended (marked) by the marker
character.
matchVersion - See abovein - TokenStream to filtermarker - A character used to mark reversed tokens| Method Detail |
|---|
public boolean incrementToken()
throws IOException
incrementToken in class org.apache.lucene.analysis.TokenStreamIOException@Deprecated public static String reverse(String input)
reverse(Version, String) instead. This method
will be removed in Lucene 4.0
input - the string to reverse
public static String reverse(org.apache.lucene.util.Version matchVersion,
String input)
matchVersion - See aboveinput - the string to reverse
@Deprecated public static void reverse(char[] buffer)
reverse(Version, char[]) instead. This
method will be removed in Lucene 4.0
buffer - the input char array to reverse
public static void reverse(org.apache.lucene.util.Version matchVersion,
char[] buffer)
matchVersion - See abovebuffer - the input char array to reverse
@Deprecated
public static void reverse(char[] buffer,
int len)
reverse(Version, char[], int) instead. This
method will be removed in Lucene 4.0
buffer - the input char array to reverselen - the length in the buffer up to where the
buffer should be reversed
public static void reverse(org.apache.lucene.util.Version matchVersion,
char[] buffer,
int len)
matchVersion - See abovebuffer - the input char array to reverselen - the length in the buffer up to where the
buffer should be reversed
@Deprecated
public static void reverse(char[] buffer,
int start,
int len)
reverse(Version, char[], int, int) instead. This
method will be removed in Lucene 4.0
buffer - the input char array to reversestart - the offset from where to reverse the bufferlen - the length in the buffer up to where the
buffer should be reversed
public static void reverse(org.apache.lucene.util.Version matchVersion,
char[] buffer,
int start,
int len)
matchVersion - See abovebuffer - the input char array to reversestart - the offset from where to reverse the bufferlen - the length in the buffer up to where the
buffer should be reversed
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