Class GetMetadata

java.lang.Object

org.deltava.dao.DAO

org.deltava.dao.GetMetadata

public class GetMetadata
extends DAO

A Data Access Object to retrieve app-specific metadata.

Since:

5.1

Version:

9.0

Author:

Luke

Field Summary

Fields inherited from class org.deltava.dao.DAO

_queryMax, _queryStart, _queryTimeout, WGS84_SRID

Constructor Summary

Constructors

Constructor	Description
GetMetadata(Connection c)	Initializes the Data Access Object.

Method Summary

Modifier and Type	Method	Description
String	get(String key)	Returns a metadata item.
String	get(String key, String defaultValue)	Returns a metadata item.
Map<String,String>	getAll()	Returns all metadata items.
Map<String,String>	getAll(String prefix)	Returns all metadata items whose key begins with a particular prefix.
Instant	getDate(String key)	Returns a metadata item converted to a Date.

Methods inherited from class org.deltava.dao.DAO

commitTransaction, createTimestamp, executeIDs, executeUpdate, executeUpdate, expandDate, formatDBName, formatLocation, getNewID, getQueryCount, prepare, prepareWithoutLimits, rollbackTransaction, setQueryMax, setQueryStart, setQueryTimeout, startTransaction, toID, toID, toInstant

Methods inherited from class java.lang.Object

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

Constructor Details

GetMetadata

public GetMetadata(Connection c)

Initializes the Data Access Object.

Parameters:

c - the JDBC connection to use

Method Details

get

public String get(String key)
           throws DAOException

Returns a metadata item.

Parameters:

key - the key

Returns:

the value, or null if not found

Throws:

DAOException - if a JDBC error occurs

get

public String get(String key,
 String defaultValue)
           throws DAOException

Returns a metadata item.

Parameters:

key - the key

defaultValue - the default value if not found

Returns:

the value

Throws:

DAOException - if a JDBC error occurs

getDate

public Instant getDate(String key)
                throws DAOException

Returns a metadata item converted to a Date.

Parameters:

key - the key

Returns:

the date/time value, or null if not found or unparseable

Throws:

DAOException - if a JDBC error occurs

See Also:

• SetMetadata.write(String, java.time.Instant)

getAll

public Map<String,String> getAll()
                          throws DAOException

Returns all metadata items.

Returns:

a Map of values, by key

Throws:

DAOException - if a JDBC error occurs

getAll

public Map<String,String> getAll(String prefix)
                          throws DAOException

Returns all metadata items whose key begins with a particular prefix.

Parameters:

prefix - the key prefix

Returns:

a Map of values, by key

Throws:

DAOException - if a JDBC error occurs