org.apache.commons.beanutils

Class JDBCDynaClass

Implemented Interfaces:
DynaClass, Serializable
Known Direct Subclasses:
ResultSetDynaClass, RowSetDynaClass

(package private) abstract class JDBCDynaClass
extends java.lang.Object
implements DynaClass, Serializable

Provides common logic for JDBC implementations of DynaClass.
Version:
$Revision: 557031 $ $Date: 2007-07-17 20:12:54 +0100 (Tue, 17 Jul 2007) $
Authors:
Craig R. McClanahan
George Franciscus

Field Summary

private Map
columnNameXref
Cross Reference for column name --> dyna property name (needed when lowerCase option is true)
protected boolean
lowerCase
Flag defining whether column names should be lower cased when converted to property names.
protected DynaProperty[]
properties
The set of dynamic properties that are part of this DynaClass.
protected Map
propertiesMap
The set of dynamic properties that are part of this DynaClass, keyed by the property name.

Method Summary

protected DynaProperty
createDynaProperty(ResultSetMetaData metadata, int i)
Factory method to create a new DynaProperty for the given index into the result set metadata.
protected String
getColumnName(String name)
Get the table column name for the specified property name.
DynaProperty[]
getDynaProperties()
Return an array of ProperyDescriptors for the properties currently defined in this DynaClass.
DynaProperty
getDynaProperty(String name)
Return a property descriptor for the specified property, if it exists; otherwise, return null.
String
getName()
Return the name of this DynaClass (analogous to the getName() method of java.lang.ClassDynaClass implementation class to support different dynamic classes, with different sets of properties.
protected Object
getObject(ResultSet resultSet, String name)
Get a column value from a ResultSet for the specified name.
protected void
introspect(ResultSet resultSet)
Introspect the metadata associated with our result set, and populate the properties and propertiesMap instance variables.
protected Class
loadClass(String className)
Loads and returns the Class of the given name.
DynaBean
newInstance()
Instantiate and return a new DynaBean instance, associated with this DynaClass.

Field Details

columnNameXref

private Map columnNameXref
Cross Reference for column name --> dyna property name (needed when lowerCase option is true)

lowerCase

protected boolean lowerCase
Flag defining whether column names should be lower cased when converted to property names.

properties

protected DynaProperty[] properties
The set of dynamic properties that are part of this DynaClass.

propertiesMap

protected Map propertiesMap
The set of dynamic properties that are part of this DynaClass, keyed by the property name. Individual descriptor instances will be the same instances as those in the properties list.

Method Details

createDynaProperty

protected DynaProperty createDynaProperty(ResultSetMetaData metadata,
                                          int i)
            throws SQLException
Factory method to create a new DynaProperty for the given index into the result set metadata.
Parameters:
metadata - is the result set metadata
i - is the column index in the metadata
Returns:
the newly created DynaProperty instance

getColumnName

protected String getColumnName(String name)
Get the table column name for the specified property name.
Parameters:
name - The property name
Returns:
The column name (which can be different if the lowerCase option is used).

getDynaProperties

public DynaProperty[] getDynaProperties()
Return an array of ProperyDescriptors for the properties currently defined in this DynaClass. If no properties are defined, a zero-length array will be returned.
Specified by:
getDynaProperties in interface DynaClass

getDynaProperty

public DynaProperty getDynaProperty(String name)
Return a property descriptor for the specified property, if it exists; otherwise, return null.
Specified by:
getDynaProperty in interface DynaClass
Parameters:
name - Name of the dynamic property for which a descriptor is requested

getName

public String getName()
Return the name of this DynaClass (analogous to the getName() method of java.lang.ClassDynaClass implementation class to support different dynamic classes, with different sets of properties.
Specified by:
getName in interface DynaClass

getObject

protected Object getObject(ResultSet resultSet,
                           String name)
            throws SQLException
Get a column value from a ResultSet for the specified name.
Parameters:
resultSet - The result set
name - The property name
Returns:
The value

introspect

protected void introspect(ResultSet resultSet)
            throws SQLException
Introspect the metadata associated with our result set, and populate the properties and propertiesMap instance variables.
Parameters:
resultSet - The resultSet whose metadata is to be introspected

loadClass

protected Class loadClass(String className)
            throws SQLException
Loads and returns the Class of the given name. By default, a load from the thread context class loader is attempted. If there is no such class loader, the class loader used to load this class will be utilized.
Parameters:
className - The name of the class to load
Returns:
The loaded class

newInstance

public DynaBean newInstance()
            throws IllegalAccessException,
                   InstantiationException
Instantiate and return a new DynaBean instance, associated with this DynaClass. NOTE - This operation is not supported, and throws an exception.
Specified by:
newInstance in interface DynaClass

Copyright (c) 2001-2007 - Apache Software Foundation