com.conveyal.gtfs.loader

Class JDBCTableReader<T extends Entity>

java.lang.Object

com.conveyal.gtfs.loader.JDBCTableReader<T>

All Implemented Interfaces:

TableReader<T>, Iterable<T>

public class JDBCTableReader<T extends Entity>
extends Object
implements TableReader<T>

This wraps a single database table and provides methods to load its rows into Java objects, iterate over the contents of the table, and select individual rows. Created by abyrd on 2017-04-06

Field Summary

Fields

Modifier and Type	Field and Description
static String	SQL_STATE_UNDEFINED_TABLE

Constructor Summary

Constructors

Constructor and Description
JDBCTableReader(Table specTable, DataSource dataSource, String tablePrefix, EntityPopulator<T> entityPopulator)

Method Summary

Modifier and Type	Method and Description
T	get(String id) Get a single item from this table by ID.
Iterable<T>	getAll() Get all the items from this table in an unspecified order.
Iterable<T>	getAllOrdered() Get all the items from this table in an unspecified order.
Iterable<T>	getOrdered(String id) Get all the items from this table with the given ID, in order.
int	getRowCount()
Iterable<T>	getUnordered(String id) Get all the items from this table with the given ID, in unspecified order.
Iterator<T>	iterator() As a convenience, the TableReader itself is iterable.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

SQL_STATE_UNDEFINED_TABLE

public static final String SQL_STATE_UNDEFINED_TABLE

See Also:

Constant Field Values

Constructor Detail

JDBCTableReader

public JDBCTableReader(Table specTable,
                       DataSource dataSource,
                       String tablePrefix,
                       EntityPopulator<T> entityPopulator)

Parameters:

tablePrefix - must not be null, can be empty string, should include any separator character (dot)

Method Detail

iterator

public Iterator<T> iterator()

As a convenience, the TableReader itself is iterable. Seen as an iterable, the TableReader is equivalent to calling tableReader.getAll().

Specified by:

iterator in interface Iterable<T extends Entity>

get

public T get(String id)

Get a single item from this table by ID.

Specified by:

get in interface TableReader<T extends Entity>

getOrdered

public Iterable<T> getOrdered(String id)

Get all the items from this table with the given ID, in order.

Specified by:

getOrdered in interface TableReader<T extends Entity>

getUnordered

public Iterable<T> getUnordered(String id)

Get all the items from this table with the given ID, in unspecified order.

getAll

public Iterable<T> getAll()

Get all the items from this table in an unspecified order.

Specified by:

getAll in interface TableReader<T extends Entity>

getAllOrdered

public Iterable<T> getAllOrdered()

Get all the items from this table in an unspecified order.

Specified by:

getAllOrdered in interface TableReader<T extends Entity>

getRowCount

public int getRowCount()

Returns:

the total number of rows in this table, or -1 if the table does not exist.