org.das2.qds.util

Class AsciiParser.FixedColumnsParser

java.lang.Object

org.das2.qds.util.AsciiParser.FixedColumnsParser

All Implemented Interfaces:

AsciiParser.RecordParser

Enclosing class:

AsciiParser

public final class AsciiParser.FixedColumnsParser
extends java.lang.Object
implements AsciiParser.RecordParser

Record parser looks at fixed column positions for each record.

Constructor Summary

Constructors

Constructor and Description
FixedColumnsParser(int[] columnOffsets, int[] columnWidths)

Method Summary

Modifier and Type	Method and Description
int	fieldCount() indicate the number of fields this RecordParser is expecting on each line.
int	fieldCount(java.lang.String line) return the number of fields in this line.
java.lang.String[]	fields(java.lang.String line)
java.lang.String	readNextRecord(java.io.BufferedReader reader) return the next record in a String, or null of no more records exist.
boolean	splitRecord(java.lang.String line, java.lang.String[] fields) attempts to extract fields from the record, returning true if the record could be split.
boolean	tryParseRecord(java.lang.String line, int irec, DataSetBuilder builder) returns true if the line appears to be a record.

Methods inherited from class java.lang.Object

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

Constructor Detail

FixedColumnsParser

public FixedColumnsParser(int[] columnOffsets,
                          int[] columnWidths)

Method Detail

fieldCount

public int fieldCount()

Description copied from interface: AsciiParser.RecordParser

indicate the number of fields this RecordParser is expecting on each line.

Specified by:

fieldCount in interface AsciiParser.RecordParser

Returns:

the field count.

readNextRecord

public java.lang.String readNextRecord(java.io.BufferedReader reader)
                                throws java.io.IOException

Description copied from interface: AsciiParser.RecordParser

return the next record in a String, or null of no more records exist.

Specified by:

readNextRecord in interface AsciiParser.RecordParser

Returns:

Throws:

java.io.IOException

tryParseRecord

public final boolean tryParseRecord(java.lang.String line,
                                    int irec,
                                    DataSetBuilder builder)

Description copied from interface: AsciiParser.RecordParser

returns true if the line appears to be a record. If it is a record, then the record is inserted into the builder.

Specified by:

tryParseRecord in interface AsciiParser.RecordParser

Parameters:

line - the line from the file.

irec - the record number

builder - the builder into which the data is inserted.

Returns:

true if the line appeared to be a record.

fieldCount

public int fieldCount(java.lang.String line)

Description copied from interface: AsciiParser.RecordParser

return the number of fields in this line. All records will have this number of fields. This is used for discovery and to configure the parser.

Specified by:

fieldCount in interface AsciiParser.RecordParser

Parameters:

line - the line from the file, to attempt parsing.

Returns:

the number of fields found.

fields

public java.lang.String[] fields(java.lang.String line)

splitRecord

public boolean splitRecord(java.lang.String line,
                           java.lang.String[] fields)

Description copied from interface: AsciiParser.RecordParser

attempts to extract fields from the record, returning true if the record could be split.

Specified by:

splitRecord in interface AsciiParser.RecordParser

Parameters:

line - the line from the file.

fields - array to store the fields. fieldCount() should be used to determine the length of the array.

Returns:

true if the line is a record that can be split into fields.