com.pervasive.datarush.operators.io.textfile

Class ARFFAnalyzer

java.lang.Object

com.pervasive.datarush.operators.io.textfile.ARFFAnalyzer

public class ARFFAnalyzer
extends Object

An analyzer for ARFF files. The file is read up to the first data record to provide information about the contents. The following information is provided as a result of analyzing a file:

• The relation described in the file.
• Any comments prior to the data section of the file.
• The schema of data records contained in the file and their representation mode.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ARFFAnalyzer.Analysis Contains the results of analyzing an ARFF file.

Constructor Summary

Constructors

Constructor and Description
ARFFAnalyzer()

Method Summary

Modifier and Type	Method and Description
ARFFAnalyzer.Analysis	analyze(Path file, CharsetEncoding encoding) Analyze the specified ARFF file expecting the described character set encoding.
ARFFAnalyzer.Analysis	analyze(Path file, CharsetEncoding encoding, FileClient client) Analyze the specified ARFF file expecting the described character set encoding.
ARFFAnalyzer.Analysis	analyze(Reader input) Analyze the given character stream as ARFF data.
ARFFAnalyzer.Analysis	analyze(String file, CharsetEncoding encoding) Analyze the specified ARFF file expecting the described character set encoding.

Methods inherited from class java.lang.Object

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

Constructor Detail

ARFFAnalyzer

public ARFFAnalyzer()

Method Detail

analyze

public ARFFAnalyzer.Analysis analyze(String file,
                                     CharsetEncoding encoding)
                              throws IOException,
                                     ParseException

Analyze the specified ARFF file expecting the described character set encoding.

Parameters:

file - the file to analyze. This value will be interpreted using Paths.asPath(String).

encoding - a specification of the character set encoding of the file

Returns:

the resulting analysis

Throws:

IOException - if any I/O errors occur while reading the source file

ParseException - if the file cannot be parsed as ARFF or is otherwise malformed

analyze

public ARFFAnalyzer.Analysis analyze(Path file,
                                     CharsetEncoding encoding)
                              throws IOException,
                                     ParseException

Analyze the specified ARFF file expecting the described character set encoding.

Parameters:

file - the file to analyze

encoding - a specification of the character set encoding of the file

Returns:

the resulting analysis

Throws:

IOException - if any I/O errors occur while reading the source file

ParseException - if the file cannot be parsed as ARFF or is otherwise malformed

analyze

public ARFFAnalyzer.Analysis analyze(Path file,
                                     CharsetEncoding encoding,
                                     FileClient client)
                              throws IOException,
                                     ParseException

Analyze the specified ARFF file expecting the described character set encoding.

Parameters:

file - the file to analyze

encoding - a specification of the character set encoding of the file

client - the authorization context to use for accessing the file

Returns:

the resulting analysis

Throws:

IOException - if any I/O errors occur while reading the source file

ParseException - if the file cannot be parsed as ARFF or is otherwise malformed

analyze

public ARFFAnalyzer.Analysis analyze(Reader input)
                              throws IOException,
                                     ParseException

Analyze the given character stream as ARFF data.

Parameters:

input - the data stream to analyze

Returns:

the resulting analysis of the input

Throws:

IOException - if any I/O errors occur while reading the source file

ParseException - if the file cannot be parsed as ARFF or is otherwise malformed