org.datanucleus.store.mapped.mapping
Class ObjectAsLongMapping

java.lang.Object
  extended by org.datanucleus.store.mapped.mapping.JavaTypeMapping
      extended by org.datanucleus.store.mapped.mapping.SingleFieldMapping
          extended by org.datanucleus.store.mapped.mapping.ObjectAsLongMapping

public abstract class ObjectAsLongMapping
extends SingleFieldMapping

Abstract SCO mapping for a java type that will be stored as a Long type.


Field Summary
 
Fields inherited from class org.datanucleus.store.mapped.mapping.JavaTypeMapping
datastoreContainer, datastoreMappings, LOCALISER, mmd, referenceMapping, roleForMember, storeMgr, type
 
Constructor Summary
ObjectAsLongMapping()
           
 
Method Summary
abstract  java.lang.Class getJavaType()
          Method to return the Java type.
 java.lang.String getJavaTypeForDatastoreMapping(int index)
          Accessor for the name of the java-type actually used when mapping the particular datastore field.
 java.lang.Object getObject(ExecutionContext ec, java.lang.Object resultSet, int[] exprIndex)
          Method to get the object from the datastore and convert to an object.
protected abstract  java.lang.Object longToObject(java.lang.Long datastoreValue)
          Method to extract the objects value from the datastore object.
protected abstract  java.lang.Long objectToLong(java.lang.Object object)
          Method to set the datastore value based on the object value.
 void setObject(ExecutionContext ec, java.lang.Object preparedStatement, int[] exprIndex, java.lang.Object value)
          Method to set the object when updating the the datastore.
 
Methods inherited from class org.datanucleus.store.mapped.mapping.SingleFieldMapping
equals, getBoolean, getByte, getChar, getDefaultLength, getDouble, getFloat, getInt, getLong, getShort, getString, getValidValues, initialize, prepareDatastoreMapping, setBoolean, setByte, setChar, setDouble, setFloat, setInt, setLong, setShort, setString
 
Methods inherited from class org.datanucleus.store.mapped.mapping.JavaTypeMapping
addDatastoreMapping, failureMessage, getColumnMetaDataForMember, getDatastoreContainer, getDatastoreMapping, getDatastoreMappings, getMemberMetaData, getNumberOfDatastoreMappings, getObject, getReferenceMapping, getRoleForMember, getType, getValueForDatastoreMapping, hashCode, hasSimpleDatastoreRepresentation, includeInFetchStatement, includeInInsertStatement, includeInUpdateStatement, initialize, isNullable, isSerialised, setDatastoreContainer, setMemberMetaData, setObject, setReferenceMapping, setRoleForMember
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ObjectAsLongMapping

public ObjectAsLongMapping()
Method Detail

getJavaType

public abstract java.lang.Class getJavaType()
Method to return the Java type.

Specified by:
getJavaType in class JavaTypeMapping
Returns:
The Java type being represented.

getJavaTypeForDatastoreMapping

public java.lang.String getJavaTypeForDatastoreMapping(int index)
Accessor for the name of the java-type actually used when mapping the particular datastore field. This java-type must have an entry in the datastore mappings.

Overrides:
getJavaTypeForDatastoreMapping in class SingleFieldMapping
Parameters:
index - requested datastore field index.
Returns:
the name of java-type for the requested datastore field.

setObject

public void setObject(ExecutionContext ec,
                      java.lang.Object preparedStatement,
                      int[] exprIndex,
                      java.lang.Object value)
Method to set the object when updating the the datastore.

Overrides:
setObject in class SingleFieldMapping
Parameters:
ec - ExecutionContext
preparedStatement - a datastore object that executes statements in the database
exprIndex - the position of the value in the statement
value - the value
See Also:
SingleFieldMapping.setObject(org.datanucleus.store.ExecutionContext, java.lang.Object, int[], java.lang.Object)

getObject

public java.lang.Object getObject(ExecutionContext ec,
                                  java.lang.Object resultSet,
                                  int[] exprIndex)
Method to get the object from the datastore and convert to an object.

Overrides:
getObject in class SingleFieldMapping
Parameters:
ec - ExecutionContext
resultSet - an object returned from the datastore with values
exprIndex - the position of the value in the result
Returns:
the value
See Also:
SingleFieldMapping.getObject(org.datanucleus.store.ExecutionContext, java.lang.Object, int[])

objectToLong

protected abstract java.lang.Long objectToLong(java.lang.Object object)
Method to set the datastore value based on the object value.

Parameters:
object - The object
Returns:
The value to pass to the datastore

longToObject

protected abstract java.lang.Object longToObject(java.lang.Long datastoreValue)
Method to extract the objects value from the datastore object.

Parameters:
datastoreValue - Value obtained from the datastore
Returns:
The value of this object (derived from the datastore value)


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