Package org.djutils.data

Interface DataTable

All Superinterfaces:

Identifiable, Iterable<DataRecord>

All Known Implementing Classes:

AbstractDataTable, ListDataTable

public interface DataTable
extends Iterable<DataRecord>, Identifiable

Table with data stored in structured records.

Copyright (c) 2020-2021 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See DJUTILS License.

Author:

Alexander Verbraeck, Peter Knoppers

Method Summary

Modifier and Type	Method	Description
default Class<?>[]	getColumnDataTypes()	Return the column data types as a Class<?>[].
default String[]	getColumnDataTypeStrings()	Return the column data types as a String[].
default String[]	getColumnDescriptions()	Return the column descriptions as a String[].
default String[]	getColumnIds()	Return the column ids as a String[].
ImmutableList<DataColumn<?>>	getColumns()	Returns the list of columns.
String	getDescription()	Returns the description.
default int	getNumberOfColumns()	Returns the number of columns.
boolean	isEmpty()	Returns whether the table is empty.

Methods inherited from interface org.djutils.base.Identifiable

getId

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Method Detail

getDescription

String getDescription()

Returns the description.

Returns:

description

getColumns

ImmutableList<DataColumn<?>> getColumns()

Returns the list of columns.

Returns:

list of columns

getNumberOfColumns

default int getNumberOfColumns()

Returns the number of columns.

Returns:

number of columns

isEmpty

boolean isEmpty()

Returns whether the table is empty.

Returns:

whether the table is empty

getColumnIds

default String[] getColumnIds()

Return the column ids as a String[].

Returns:

String[]; the column ids

getColumnDescriptions

default String[] getColumnDescriptions()

Return the column descriptions as a String[].

Returns:

String[] the column headers

getColumnDataTypes

default Class<?>[] getColumnDataTypes()

Return the column data types as a Class<?>[].

Returns:

Class<?>[] the column data types

getColumnDataTypeStrings

default String[] getColumnDataTypeStrings()

Return the column data types as a String[]. Each data type is presented as the full class name or the primitive name. In case of an array, the result is preceded by an "[" for each dimension. After one or more "[" symbols, the class name is preceded by an "L" for a non-primitive class or interface, and by "I" for integer, "Z" for boolean, "B" for byte, "C" for char, "D" for double, "F" for float, "J" for long and "S" for short. So for a column with a double, "double" is returned. For a column with a "Double", "java.lang.Double" is returned, for an int[][], "[[I" is returned, and for a Long[], "[Ljava.lang.Long" is returned.

Returns:

String[] the column data types as an array of Strings