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Java Source Code / Java Documentation » J2EE » Expresso » com.jcorporate.expresso.core.db 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   com.jcorporate.expresso.kernel.EmbeddedComponent
      com.jcorporate.expresso.core.db.TypeMapper

TypeMapper
public class TypeMapper extends com.jcorporate.expresso.kernel.EmbeddedComponent implements ComponentLifecycle(Code)
Type Mapper takes care of the job of mapping various Java types to SQL types. This, in turn, is used by items like DBCreate, Database Verifier, etc. The type mapper is embedded within the PersistenceManager.
author:
   Michael Rimov
See Also:   com.jcorporate.expresso.core.dataobjects.PersistenceManager



Constructor Summary
public  TypeMapper()
     Default constructor.
protected  TypeMapper(String thedataContext)
    

Method Summary
public synchronized  voidconfigure(Configuration newConfig)
     Sets up all the types now that we know the parent's data context.
public  voiddestroy()
     Destroys the component.
public  IntegergetExpressoToJava(String dbFieldType)
     Retrieve a DBField to java.sql.Types mapping value.
public  MapgetExpressoToSQLMap()
    
public static synchronized  TypeMappergetInstance(String dataContext)
     Retrieves an instance of the type mapper.

To be deprecated soon.

public  intgetJavaSQLType(String fieldType)
     Return a java.sql.Types integer that maps to the field type listed
Parameters:
  fieldType - the type of the field to map.
public  StringgetMetadataName()
     Because we look up our metadata in the parent component, we have to somehow know WHAT component's metadata is ours.
public  StringgetNameForSQL(int sqlType)
    
public  MapgetSQLToDBMap()
    
public  StringgetTypeForDB(String expressoType)
     Map a type used in Expresso to an appropriate database-specific type, utilizing the default type mapping followed by the custom type mapping(s) for this context (if any)
Parameters:
  expressoType - The java.sql datatype to check against.
public  StringgetTypeForExpresso(int sqlType)
     Map a type used in SQL to an appropriate expresso-specific type
Parameters:
  sqlType - The java.sql datatype to check against.
public  StringgetTypeForSQL(int sqlType)
    
public  voidinitialize()
     Any quick initializations here.
protected  voidinitializeTypes(String dataContext)
     Initialize the mappings between java types, expresso types, and SQL types.
public synchronized  voidreconfigure(Configuration newConfig)
     Reconfigures the TypeMapper.


Constructor Detail
TypeMapper
public TypeMapper()(Code)
Default constructor. Required for componentization.



TypeMapper
protected TypeMapper(String thedataContext)(Code)
Constructor that initializes the type mapper based upon the data context
Parameters:
  thedataContext - the dataContext to load the Type Mapping for




Method Detail
configure
public synchronized void configure(Configuration newConfig) throws ConfigurationException(Code)
Sets up all the types now that we know the parent's data context.
Parameters:
  newConfig - Configuration settings.
throws:
  ConfigurationException - upon error



destroy
public void destroy()(Code)
Destroys the component. Removes the mapinstances and deallocates all the HashMaps that were allocated



getExpressoToJava
public Integer getExpressoToJava(String dbFieldType)(Code)
Retrieve a DBField to java.sql.Types mapping value.
Parameters:
  dbFieldType - the DBField data type an integer corresponding to the java.sql.Types or -1 if nomapping is found



getExpressoToSQLMap
public Map getExpressoToSQLMap()(Code)
Get the ExpressoToSQL Map A Map getting this context's ExpressoToSQL maps.



getInstance
public static synchronized TypeMapper getInstance(String dataContext) throws DBException(Code)
Retrieves an instance of the type mapper.

To be deprecated soon. use the Component System with PersistenceManager to retrieve an instance of the type mapper instead.
Parameters:
  dataContext - the data context to retrieve it for. a fully initialized TypeMapper instance
throws:
  DBException - upon error getting or initializing the TypeMapperfor that context




getJavaSQLType
public int getJavaSQLType(String fieldType) throws DBException(Code)
Return a java.sql.Types integer that maps to the field type listed
Parameters:
  fieldType - the type of the field to map. a DoubleOrderedMap containing all the type mappings for thiscontext
throws:
  DBException - if there was an error initializing the ExpressoToSQLmaps.



getMetadataName
public String getMetadataName()(Code)
Because we look up our metadata in the parent component, we have to somehow know WHAT component's metadata is ours. Sub classes need to override this one-liner and return the name of the metadata we're looking for. java.lang.String



getNameForSQL
public String getNameForSQL(int sqlType)(Code)
Get the actual java.sql.Type in a friendly String name
Parameters:
  sqlType - java.sql.Type integer the corresponding string



getSQLToDBMap
public Map getSQLToDBMap()(Code)
Get the SQL to Database type Map A hashtable getting this context's SqlToDB map.



getTypeForDB
public String getTypeForDB(String expressoType) throws DBException(Code)
Map a type used in Expresso to an appropriate database-specific type, utilizing the default type mapping followed by the custom type mapping(s) for this context (if any)
Parameters:
  expressoType - The java.sql datatype to check against. The appropriate datatype for this database context.
throws:
  DBException - If there's an getting the datatype.



getTypeForExpresso
public String getTypeForExpresso(int sqlType) throws DBException(Code)
Map a type used in SQL to an appropriate expresso-specific type
Parameters:
  sqlType - The java.sql datatype to check against. The appropriate datatype from this database context.
throws:
  DBException - If there's an getting the datatype.



getTypeForSQL
public String getTypeForSQL(int sqlType)(Code)
Retrieve a 'friendly' name for a java.sql.Type integer
Parameters:
  sqlType - the java.sql.Types integer value a String corresponding to that integer value.



initialize
public void initialize()(Code)
Any quick initializations here.



initializeTypes
protected void initializeTypes(String dataContext) throws DBException(Code)
Initialize the mappings between java types, expresso types, and SQL types.
Parameters:
  dataContext - the data context to map for
throws:
  DBException - upon error



reconfigure
public synchronized void reconfigure(Configuration newConfig) throws ConfigurationException(Code)
Reconfigures the TypeMapper. Resets all the HashMaps and reinitializes all the type mappings.
Parameters:
  newConfig - the new Configuration bean.
throws:
  ConfigurationException - upon reconfiguration error.



Methods inherited from com.jcorporate.expresso.kernel.EmbeddedComponent
public synchronized ComponentMetadata getMetaData()(Code)(Java Doc)
abstract public String getMetadataName()(Code)(Java Doc)
public synchronized Containable getParent()(Code)(Java Doc)
public synchronized void setParent(Containable parent)(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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