ch.uzh.ifi.attempto.ape

Class APELocal

java.lang.Object

ch.uzh.ifi.attempto.ape.ACEParser

ch.uzh.ifi.attempto.ape.APELocal

public class APELocal
extends ACEParser

This class provides an interface to the SWI Prolog executable of the Attempto Parsing Engine (APE). Note that you need the file "ape.exe" (which can be compiled from the Attempto APE distribution) and that SWI Prolog needs to be installed. Under Linux, the following environment variable has to be set additionally:

LD_PRELOAD=/usr/lib/pl-5.6.45/lib/i386-linux/libjpl.so

The exact paths are most probably different on your machine. Just look for the directory that contains the file or symbolic link libjpl.jnilib (under Mac OS X), jpl.dll (under Windows), or libjpl.so (under Unix). If you get the error message

java.lang.UnsatisfiedLinkError: no jpl in java.library.path

then this is a strong indication that the SWI Prolog JPL libraries are not found.

Author:

Tobias Kuhn

Method Summary

Methods

Modifier and Type	Method and Description
void	addLexicon(Lexicon lexicon) Loads the lexicon by adding all lexicon entries of the lexicon.
void	addLexiconEntry(LexiconEntry lexiconEntry) Adds a new lexicon entry.
void	discardLexicon() Discards the dynamically added lexicon entries.
static APELocal	getInstance() Returns the singleton APELocal instance.
ACEParserResult	getMultiOutput(String text, Lexicon lexicon, OutputType... outputTypes) Returns multiple outputs for the given ACE text using the given lexicon.
String	getSoloOutput(String text, Lexicon lexicon, OutputType outputType) Returns one single output for the given ACE text using the given lexicon.
static void	init(String apeExeFile) Initializes the APELocal singleton instance.
static void	init(String apeExeFile, boolean guessSwiPrologPath) Initializes the APELocal singleton instance.
static void	init(String prologCommand, String apeExeFile) Deprecated.
static boolean	isInitialized() Checks whether the singleton instance has already been initialized.

Methods inherited from class ch.uzh.ifi.attempto.ape.ACEParser

getMultiOutput, getSoloOutput, getURI, isClexEnabled, isGuessingEnabled, setClexEnabled, setGuessingEnabled, setURI

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static APELocal getInstance()

Returns the singleton APELocal instance. Null is returned if the APELocal instance has not yet been initialized by the constructor or the init method.

Returns:

The singleton APELocal instance.

init

public static void init(String apeExeFile,
        boolean guessSwiPrologPath)

Initializes the APELocal singleton instance. This method can be called at most once. If you call it twice then a runtime exception is thrown.

Parameters:

apeExeFile - The path (with filename) of the file "ape.exe".

guessSwiPrologPath - Guess the location of SWI-Prolog.

init

public static void init(String apeExeFile)

Initializes the APELocal singleton instance. This method can be called at most once. If you call it twice then a runtime exception is thrown.

Parameters:

apeExeFile - The path (with filename) of the file "ape.exe".

init

@Deprecated
public static void init(String prologCommand,
                   String apeExeFile)

Deprecated.

Initializes the APELocal singleton instance. This method can be called at most once. If you call it twice or if you called the constructor before then a runtime exception is thrown.
This method is deprecated because the prologCommand argument is actually not needed. Use init(String) instead.

Parameters:

prologCommand - The command to run the SWI Prolog interpreter. On Windows this is usually "plcon", on Linux and MacOS "swipl".

apeExeFile - The path (with filename) of the file "ape.exe".

isInitialized

public static boolean isInitialized()

Checks whether the singleton instance has already been initialized.

Returns:

true if the singleton instance has been initialized.

getSoloOutput

public String getSoloOutput(String text,
                   Lexicon lexicon,
                   OutputType outputType)
                     throws ACEParserException

Description copied from class: ACEParser

Returns one single output for the given ACE text using the given lexicon. See the enumeration OutputType for further information about the possible outputs. If parsing succeeds then a string containing the result of the parser is returned. In the case of failure, an ACEParserException is thrown containing the error messages.

Specified by:

getSoloOutput in class ACEParser

Parameters:

text - The ACE text to be parsed.

lexicon - The lexicon to be loaded.

outputType - The kind of output that should be returned.

Returns:

The result as a string.

Throws:

ACEParserException - Contains the error messages if an error occurred.

See Also:

ACEParser.getMultiOutput(String, Lexicon, OutputType...)

getMultiOutput

public ACEParserResult getMultiOutput(String text,
                             Lexicon lexicon,
                             OutputType... outputTypes)

Description copied from class: ACEParser

Returns multiple outputs for the given ACE text using the given lexicon. See the enumeration OutputType for further information about the possible outputs. The result is returned as an ACEParserResult object.

Specified by:

getMultiOutput in class ACEParser

Parameters:

text - The ACE text to be parsed.

lexicon - The lexicon to be loaded.

outputTypes - The kind of outputs that should be returned.

Returns:

A ParserResult object containing the outputs.

See Also:

ACEParser.getSoloOutput(String, Lexicon, OutputType)

addLexicon

public void addLexicon(Lexicon lexicon)

Loads the lexicon by adding all lexicon entries of the lexicon. Note that these lexicon entries are automatically discarded the first time you call getSoloOutput or getMultiOutput with a lexicon parameter that is not null.

Parameters:

lexicon - The lexicon to be loaded.

See Also:

addLexiconEntry(ch.uzh.ifi.attempto.ape.LexiconEntry), discardLexicon()

addLexiconEntry

public void addLexiconEntry(LexiconEntry lexiconEntry)

Adds a new lexicon entry. Note that this lexicon entry is automatically discarded the first time you call getSoloOutput or getMultiOutput with a lexicon parameter that is not null.

Parameters:

lexiconEntry - The lexicon entry to be added.

See Also:

addLexicon(ch.uzh.ifi.attempto.ape.Lexicon), discardLexicon()

discardLexicon

public void discardLexicon()

Discards the dynamically added lexicon entries. Note that the lexicon entries that are complied into the SWI Prolog executable are not affected by this operation.

See Also:

addLexiconEntry(ch.uzh.ifi.attempto.ape.LexiconEntry), addLexicon(ch.uzh.ifi.attempto.ape.Lexicon)