edu.unh.sdb.datasource
Class DataSourceCollection

java.lang.Object
  edu.unh.sdb.datasource.DataSourceCollection

public class DataSourceCollection
extends java.lang.Object

The DataSourceCollection class provides for a list of datasources with customary list functionality. The list was intended to be populated either by reading a database or by processing some Data Description Language. The list is only allowed to grow. Elements are never deleted from the list.

Constructor Summary

DataSourceCollection()

Method Summary

void	add(DataSource ds) Add a DataSource to the end of the list
DataSource	get(int i) Returns the DataSource at the designated index or null DataSource object if no more exists.
DataSource	get(java.lang.String s) Returns the DataSource object corresponding to the DataSource named by the string.
DataSource	getDataSource(java.lang.String s) Returns the DataSource object corresponding to the DataSource named by the string
DataSource	getElementAt(int i) Returns the DataSource at the designated index or null DataSource object if no more exists.
int	indexOf(java.lang.String s) Returns the integer index of the datasource corresponding to the DataSource named by the string.
int	indexOfName(java.lang.String s) Returns the integer index value for the DataSource denoted by string.
void	merge(DataSourceCollection dsColl) if name exists in both collections, the new one is discarded
boolean	nameExists(java.lang.String s) Returns true if DataSource named by String is in the list
DataSource	next() returns the next DataSource object or null DataSource object if no more exists
void	rewind() Resets the index to beginning of the list
int	size() Returns the number of elements stored this DataSource collection as an integer
java.lang.String	toString() for debugging - prints the total number of datasource collections stored.

Methods inherited from class java.lang.Object

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

Constructor Detail

DataSourceCollection

public DataSourceCollection()

Method Detail

next

public DataSource next()

returns the next DataSource object or null DataSource object if no more exists

getElementAt

public DataSource getElementAt(int i)

Returns the DataSource at the designated index or null DataSource object if no more exists. Returns a null DataSource object if index does not exist.

get

public DataSource get(int i)

Returns the DataSource at the designated index or null DataSource object if no more exists. Returns a null DataSource object if index does not exist. This is a shorthand method to getElementAt() added for compatibility with SDB naming conventions.

add

public void add(DataSource ds)

Add a DataSource to the end of the list

rewind

public void rewind()

Resets the index to beginning of the list

indexOfName

public int indexOfName(java.lang.String s)

Returns the integer index value for the DataSource denoted by string. Returns -1 if the DataSource name does not exist

nameExists

public boolean nameExists(java.lang.String s)

Returns true if DataSource named by String is in the list

indexOf

public int indexOf(java.lang.String s)

Returns the integer index of the datasource corresponding to the DataSource named by the string. If name does not exist, a null DataSource will be returned

getDataSource

public DataSource getDataSource(java.lang.String s)

Returns the DataSource object corresponding to the DataSource named by the string

get

public DataSource get(java.lang.String s)

Returns the DataSource object corresponding to the DataSource named by the string. This is a shorthand for getDataSource(String) to comply with SDB naming conventions.

size

public int size()

Returns the number of elements stored this DataSource collection as an integer

merge

public void merge(DataSourceCollection dsColl)

if name exists in both collections, the new one is discarded

toString

public java.lang.String toString()

for debugging - prints the total number of datasource collections stored. Later will give names of each datasource

Overrides:

toString in class java.lang.Object