org.exolab.castor.jdo.engine.nature
Class ClassDescriptorJDONature

java.lang.Object
  org.castor.core.nature.BaseNature
      org.exolab.castor.jdo.engine.nature.ClassDescriptorJDONature

public class ClassDescriptorJDONature
extends BaseNature

JDO-specific nature for ClassDescriptor.

Augments ClassDescriptor to include persistence-specific data such as e.g. the table name, cache parameter, key generators, access mode and other SQL-related information.

To access persistence-specific data of a ClassDescriptor, use the following code fragment to ...

1. check for this nature
2. apply this nature to the ClassDescriptor in question.
3. access e.g. the table name.

Sample - Looking up table name

    ClassDescriptor classDescriptor = ...;                                               
    ...
    if (classDescriptor.hasNature(ClassDescriptorJDONature.class.getName()) {              1)
       ClassDescriptorJDONature nature = new ClassDescriptorJDONature(classDescriptor);    2)
       ...
       String tableName = nature.getTableName();                                           3)
    }
 

Since:

1.2.1

Author:

Werner Guttmann

Constructor Summary

ClassDescriptorJDONature(PropertyHolder holder)
Creates an instance of ClassDescriptorJDONature.

Method Summary

void	addCacheParam(String key, String value) Adds a cache parameter to this ClassDescriptor.
void	addExtended(ClassDescriptor classDesc) Adds a ClassDescriptor that extends this class.
void	addNamedNativeQuery(String name, NamedNativeQuery query) Adds a named query to this ClassDescriptor.
void	addNamedQuery(String name, String query) Adds a named query to this ClassDescriptor.
AccessMode	getAccessMode() Returns the access mode to which this object maps.
Properties	getCacheParams() Returns the cache parameters defined for this ClassDescriptor.
Collection<ClassDescriptor>	getExtended() Returns a collection of ClassDescriptors that extend this class (descriptor).
FieldDescriptor	getField(String name) Returns the FieldDescriptor for the given name.
String	getId()
KeyGeneratorDescriptor	getKeyGeneratorDescriptor() Get key generator specified for this class.
Map<String,NamedNativeQuery>	getNamedNativeQueries() Get map of named native queries associated with their names.
Map<String,String>	getNamedQueries() Get map of named query strings associated with their names.
String	getTableName() Returns the table name to which this object maps.
String	getVersionField() Returns the name of the version field used for checks on object modifications.
void	setAccessMode(AccessMode accessMode) Sets the access mode to which this ClassDescriptor maps.
void	setKeyGeneratorDescriptor(KeyGeneratorDescriptor keyGenDesc) Set key generator specified for this class.
void	setTableName(String tableName) Sets the table name to which this object maps.
void	setVersionField(String versionField) Sets the version field to use for object modification checks.

Methods inherited from class org.castor.core.nature.BaseNature

getBooleanPropertyDefaultFalse, getHolder, getProperty, getPropertyAsList, getPropertyAsMap, setProperty

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassDescriptorJDONature

public ClassDescriptorJDONature(PropertyHolder holder)

Creates an instance of ClassDescriptorJDONature.

Parameters:

holder - The PropertyHolder to 'view upon'.

Method Detail

getId

public String getId()

See Also:

Nature.getId()

setTableName

public void setTableName(String tableName)

Sets the table name to which this object maps.

Parameters:

tableName - Table name

getTableName

public String getTableName()

Returns the table name to which this object maps.

Returns:

Table name

setAccessMode

public void setAccessMode(AccessMode accessMode)

Sets the access mode to which this ClassDescriptor maps.

Parameters:

accessMode - The access mode to be used.

getAccessMode

public AccessMode getAccessMode()

Returns the access mode to which this object maps.

Returns:

Access mode

setKeyGeneratorDescriptor

public void setKeyGeneratorDescriptor(KeyGeneratorDescriptor keyGenDesc)

Set key generator specified for this class.

Parameters:

keyGenDesc - Key generator descriptor.

getKeyGeneratorDescriptor

public KeyGeneratorDescriptor getKeyGeneratorDescriptor()

Get key generator specified for this class.

Returns:

Key generator descriptor.

addCacheParam

public void addCacheParam(String key,
                          String value)

Adds a cache parameter to this ClassDescriptor.

Parameters:

key - The cache parameter key.

value - The cache parameter value.

getCacheParams

public Properties getCacheParams()

Returns the cache parameters defined for this ClassDescriptor.

Returns:

the defined cache parameters

addNamedQuery

public void addNamedQuery(String name,
                          String query)

Adds a named query to this ClassDescriptor.

Parameters:

name - The name of the named query.

query - The query string

getNamedQueries

public Map<String,String> getNamedQueries()

Get map of named query strings associated with their names.

Returns:

Map of named query strings associated with their names.

getVersionField

public String getVersionField()

Returns the name of the version field used for checks on object modifications.

Returns:

The name of the version field, null if not set.

addNamedNativeQuery

public void addNamedNativeQuery(String name,
                                NamedNativeQuery query)

Adds a named query to this ClassDescriptor.

Parameters:

name - The name of the named query.

query - The query string

getNamedNativeQueries

public Map<String,NamedNativeQuery> getNamedNativeQueries()

Get map of named native queries associated with their names.

Returns:

Map of named native queries associated with their names.

getField

public FieldDescriptor getField(String name)

Returns the FieldDescriptor for the given name.

Parameters:

name - A field name.

Returns:

The associated FieldDescriptor.

addExtended

public void addExtended(ClassDescriptor classDesc)

Adds a ClassDescriptor that extends this class.

Parameters:

classDesc - A ClassDescriptor that extends this class.

getExtended

public Collection<ClassDescriptor> getExtended()

Returns a collection of ClassDescriptors that extend this class (descriptor).

Returns:

A collection of ClassDescriptors that extend this class.

setVersionField

public void setVersionField(String versionField)

Sets the version field to use for object modification checks.

Parameters:

versionField - the name of the field.