Package org.apache.lucene.analysis.util

Class AbstractAnalysisFactory

java.lang.Object

org.apache.lucene.analysis.util.AbstractAnalysisFactory

Direct Known Subclasses:

CharFilterFactory, TokenFilterFactory, TokenizerFactory

public abstract class AbstractAnalysisFactory
extends Object

Abstract parent class for analysis factories TokenizerFactory, TokenFilterFactory and CharFilterFactory.

The typical lifecycle for a factory consumer is:

1. Create factory via its constructor (or via XXXFactory.forName)
2. (Optional) If the factory uses resources such as files, ResourceLoaderAware.inform(ResourceLoader) is called to initialize those resources.
3. Consumer calls create() to obtain instances.

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	CLASS_NAME
private boolean	isExplicitLuceneMatchVersion	whether the luceneMatchVersion arg is explicitly specified in the serialized schema
private static final Pattern	ITEM_PATTERN
static final String	LUCENE_MATCH_VERSION_PARAM
protected final Version	luceneMatchVersion	the luceneVersion arg
private final Map<String,String>	originalArgs	The original args, before any processing

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractAnalysisFactory(Map<String,String> args)	Initialize this factory via a set of key-value pairs.

Method Summary

Modifier and Type	Method	Description
(package private) static String	generateLegacySPIName(Class<? extends AbstractAnalysisFactory> service, String[] suffixes)	Deprecated.
String	get(Map<String,String> args, String name)
String	get(Map<String,String> args, String name, String defaultVal)
String	get(Map<String,String> args, String name, Collection<String> allowedValues)
String	get(Map<String,String> args, String name, Collection<String> allowedValues, String defaultVal)
String	get(Map<String,String> args, String name, Collection<String> allowedValues, String defaultVal, boolean caseSensitive)
protected final boolean	getBoolean(Map<String,String> args, String name, boolean defaultVal)
char	getChar(Map<String,String> args, String name, char defaultValue)
String	getClassArg()
protected final float	getFloat(Map<String,String> args, String name, float defaultVal)
protected final int	getInt(Map<String,String> args, String name, int defaultVal)
protected final List<String>	getLines(ResourceLoader loader, String resource)	Returns the resource's lines (with content treated as UTF-8)
final Version	getLuceneMatchVersion()
final Map<String,String>	getOriginalArgs()
protected final Pattern	getPattern(Map<String,String> args, String name)	Compiles a pattern for the value of the specified argument key name
Set<String>	getSet(Map<String,String> args, String name)	Returns whitespace- and/or comma-separated set of values, or null if none are found
protected final CharArraySet	getSnowballWordSet(ResourceLoader loader, String wordFiles, boolean ignoreCase)	same as getWordSet(ResourceLoader, String, boolean), except the input is in snowball format.
protected final CharArraySet	getWordSet(ResourceLoader loader, String wordFiles, boolean ignoreCase)	Returns as CharArraySet from wordFiles, which can be a comma-separated list of filenames
boolean	isExplicitLuceneMatchVersion()
(package private) static String	lookupSPIName(Class<? extends AbstractAnalysisFactory> service)	Looks up SPI name (static "NAME" field) with appropriate modifiers.
String	require(Map<String,String> args, String name)
String	require(Map<String,String> args, String name, Collection<String> allowedValues)
String	require(Map<String,String> args, String name, Collection<String> allowedValues, boolean caseSensitive)
protected final boolean	requireBoolean(Map<String,String> args, String name)
char	requireChar(Map<String,String> args, String name)
protected final float	requireFloat(Map<String,String> args, String name)
protected final int	requireInt(Map<String,String> args, String name)
void	setExplicitLuceneMatchVersion(boolean isExplicitLuceneMatchVersion)
protected final List<String>	splitAt(char separator, String list)	Splits a list separated by zero or more given separator characters.
protected final List<String>	splitFileNames(String fileNames)	Splits file names separated by comma character.

Methods inherited from class java.lang.Object

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

Field Details

LUCENE_MATCH_VERSION_PARAM

public static final String LUCENE_MATCH_VERSION_PARAM

See Also:

• Constant Field Values

originalArgs

private final Map<String,String> originalArgs

The original args, before any processing

luceneMatchVersion

protected final Version luceneMatchVersion

the luceneVersion arg

isExplicitLuceneMatchVersion

private boolean isExplicitLuceneMatchVersion

whether the luceneMatchVersion arg is explicitly specified in the serialized schema

ITEM_PATTERN

private static final Pattern ITEM_PATTERN

CLASS_NAME

private static final String CLASS_NAME

See Also:

• Constant Field Values

Constructor Details

AbstractAnalysisFactory

protected AbstractAnalysisFactory(Map<String,String> args)

Initialize this factory via a set of key-value pairs.

Method Details

getOriginalArgs

public final Map<String,String> getOriginalArgs()

getLuceneMatchVersion

public final Version getLuceneMatchVersion()

require

public String require(Map<String,String> args,
 String name)

require

public String require(Map<String,String> args,
 String name,
 Collection<String> allowedValues)

require

public String require(Map<String,String> args,
 String name,
 Collection<String> allowedValues,
 boolean caseSensitive)

get

public String get(Map<String,String> args,
 String name)

get

public String get(Map<String,String> args,
 String name,
 String defaultVal)

get

public String get(Map<String,String> args,
 String name,
 Collection<String> allowedValues)

get

public String get(Map<String,String> args,
 String name,
 Collection<String> allowedValues,
 String defaultVal)

get

public String get(Map<String,String> args,
 String name,
 Collection<String> allowedValues,
 String defaultVal,
 boolean caseSensitive)

requireInt

protected final int requireInt(Map<String,String> args,
 String name)

getInt

protected final int getInt(Map<String,String> args,
 String name,
 int defaultVal)

requireBoolean

protected final boolean requireBoolean(Map<String,String> args,
 String name)

getBoolean

protected final boolean getBoolean(Map<String,String> args,
 String name,
 boolean defaultVal)

requireFloat

protected final float requireFloat(Map<String,String> args,
 String name)

getFloat

protected final float getFloat(Map<String,String> args,
 String name,
 float defaultVal)

requireChar

public char requireChar(Map<String,String> args,
 String name)

getChar

public char getChar(Map<String,String> args,
 String name,
 char defaultValue)

getSet

public Set<String> getSet(Map<String,String> args,
 String name)

Returns whitespace- and/or comma-separated set of values, or null if none are found

getPattern

protected final Pattern getPattern(Map<String,String> args,
 String name)

Compiles a pattern for the value of the specified argument key name

getWordSet

protected final CharArraySet getWordSet(ResourceLoader loader,
 String wordFiles,
 boolean ignoreCase)
                                 throws IOException

Returns as CharArraySet from wordFiles, which can be a comma-separated list of filenames

Throws:

IOException

getLines

protected final List<String> getLines(ResourceLoader loader,
 String resource)
                               throws IOException

Returns the resource's lines (with content treated as UTF-8)

Throws:

IOException

getSnowballWordSet

protected final CharArraySet getSnowballWordSet(ResourceLoader loader,
 String wordFiles,
 boolean ignoreCase)
                                         throws IOException

same as getWordSet(ResourceLoader, String, boolean), except the input is in snowball format.

Throws:

IOException

splitFileNames

protected final List<String> splitFileNames(String fileNames)

Splits file names separated by comma character. File names can contain comma characters escaped by backslash '\'

Parameters:

fileNames - the string containing file names

Returns:

a list of file names with the escaping backslashed removed

splitAt

protected final List<String> splitAt(char separator,
 String list)

Splits a list separated by zero or more given separator characters. List items can contain comma characters escaped by backslash '\'. Whitespace is NOT trimmed from the returned list items.

Parameters:

list - the string containing the split list items

Returns:

a list of items with the escaping backslashes removed

getClassArg

public String getClassArg()

Returns:

the string used to specify the concrete class name in a serialized representation: the class arg. If the concrete class name was not specified via a class arg, returns getClass().getName().

isExplicitLuceneMatchVersion

public boolean isExplicitLuceneMatchVersion()

setExplicitLuceneMatchVersion

public void setExplicitLuceneMatchVersion(boolean isExplicitLuceneMatchVersion)

lookupSPIName

static String lookupSPIName(Class<? extends AbstractAnalysisFactory> service)
                     throws NoSuchFieldException,
IllegalAccessException,
IllegalStateException

Looks up SPI name (static "NAME" field) with appropriate modifiers. Also it must be a String class and declared in the concrete class.

Returns:

the SPI name

Throws:

NoSuchFieldException - - if the "NAME" field is not defined.

IllegalAccessException - - if the "NAME" field is inaccessible.

IllegalStateException - - if the "NAME" field does not have appropriate modifiers or isn't a String field.

generateLegacySPIName

@Deprecated
static String generateLegacySPIName(Class<? extends AbstractAnalysisFactory> service,
 String[] suffixes)

Deprecated.

Generate legacy SPI name derived from the class name.

Returns:

the SPI name