org.gbif.utils.file.tabular

Class TabularFileMetadataExtractor

java.lang.Object

org.gbif.utils.file.tabular.TabularFileMetadataExtractor

public class TabularFileMetadataExtractor
extends Object

Utility class to extract metadata TabularFileMetadata from a tabular file.

Method Summary

Modifier and Type	Method and Description
static TabularFileMetadata	extractTabularFileMetadata(Path filePath) Extract metadata from a tabular file using a sample (defined by MAX_SAMPLE_SIZE) of the file.
static Optional<Character>	getDelimiterChar(List<String> sample) Given a sample of line, this method tries to determine the delimiter char used.

Methods inherited from class java.lang.Object

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

Method Detail

extractTabularFileMetadata

public static TabularFileMetadata extractTabularFileMetadata(Path filePath)
                                                      throws IOException,
                                                             UnknownCharsetException

Extract metadata from a tabular file using a sample (defined by MAX_SAMPLE_SIZE) of the file. The extraction process is based on the frequency of character in the sample using 3 different approaches. The method will not return any default value if no delimiter and/or quote character can be found in the sample. The caller should decide which default values should be used to read the file.

Parameters:

filePath - a Path pointing to a file (not a folder).

Returns:

new TabularFileMetadata, never null (but the content can be null).

Throws:

IOException

UnknownCharsetException

getDelimiterChar

public static Optional<Character> getDelimiterChar(List<String> sample)

Given a sample of line, this method tries to determine the delimiter char used.

Parameters:

sample -

Returns:

the determined delimiter or Optional.empty if it can not be determined.