org.datanucleus.store.mapped.mapping
Class StringBufferMapping

java.lang.Object
  org.datanucleus.store.mapped.mapping.JavaTypeMapping
      org.datanucleus.store.mapped.mapping.SingleFieldMapping
          org.datanucleus.store.mapped.mapping.StringMapping
              org.datanucleus.store.mapped.mapping.StringBufferMapping

public class StringBufferMapping
extends StringMapping

Mapping for a StringBuffer type. Note: A java.lang.StringBuffer is a final class and does not allow a SCO implementation in order of implementing dirty detecting

Field Summary

protected static StringBufferStringConverter	converter
protected static java.lang.StringBuffer	mappingSampleValue

Fields inherited from class org.datanucleus.store.mapped.mapping.JavaTypeMapping

datastoreContainer, datastoreMappings, LOCALISER, mmd, referenceMapping, roleForMember, storeMgr, type

Constructor Summary

StringBufferMapping()

Method Summary

java.lang.Class	getJavaType() Accessor for the java type being mapped.
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(ObjectManager om, java.lang.Object resultSet, int[] exprIndex) Delegates to StringMapping the retrieval of a String and constructs a StringBuffer out of it
java.lang.Object	getSampleValue(ClassLoaderResolver clr) Return a sample value of the mapping type to be used for internal evaluation of type/conversion.
ScalarExpression	newLiteral(QueryExpression qs, java.lang.Object value) Creates a literal from an value for use in TJDO-style JDOQL.
void	setObject(ObjectManager om, java.lang.Object preparedStatement, int[] exprIndex, java.lang.Object value) Delegates to StringMapping the storage with giving a String

Methods inherited from class org.datanucleus.store.mapped.mapping.StringMapping

newScalarExpression

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, setDefault, setMemberMetaData, setObject, setReferenceMapping, setRoleForMember

Methods inherited from class java.lang.Object

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

Field Detail

converter

protected static StringBufferStringConverter converter

mappingSampleValue

protected static java.lang.StringBuffer mappingSampleValue

Constructor Detail

StringBufferMapping

public StringBufferMapping()

Method Detail

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(ObjectManager om,
                      java.lang.Object preparedStatement,
                      int[] exprIndex,
                      java.lang.Object value)

Delegates to StringMapping the storage with giving a String

Overrides:

setObject in class SingleFieldMapping

Parameters:

om - the ObjectManager

preparedStatement - a datastore object that executes statements in the database

exprIndex - the position of the value in the statement

value - the value

getObject

public java.lang.Object getObject(ObjectManager om,
                                  java.lang.Object resultSet,
                                  int[] exprIndex)

Delegates to StringMapping the retrieval of a String and constructs a StringBuffer out of it

Overrides:

getObject in class SingleFieldMapping

Parameters:

om - the ObjectManager

resultSet - an object returned from the datastore with values

exprIndex - the position of the value in the result

Returns:

the value

getJavaType

public java.lang.Class getJavaType()

Description copied from class: JavaTypeMapping

Accessor for the java type being mapped. This is the java type that the mapping represents. Some examples :

• if the field is of type "MyClass" then the mapping will be OIDMapping (or subclass) the javaType will be OID, and the type will be MyClass.
• if the field is of type "int" then the mapping will be IntegerMapping, the javaType will be Integer, and the type will be int.

The "java type" is the java-type name used in the plugin.xml mapping file

Overrides:

getJavaType in class StringMapping

Returns:

The java type

getSampleValue

public java.lang.Object getSampleValue(ClassLoaderResolver clr)

Description copied from class: JavaTypeMapping

Return a sample value of the mapping type to be used for internal evaluation of type/conversion. TODO Delete when we drop legacy support

Overrides:

getSampleValue in class StringMapping

Parameters:

clr - ClassLoader resolver

Returns:

The sample value.

newLiteral

public ScalarExpression newLiteral(QueryExpression qs,
                                   java.lang.Object value)

Description copied from class: JavaTypeMapping

Creates a literal from an value for use in TJDO-style JDOQL. This implementation just throws a NucleusException.

Overrides:

newLiteral in class StringMapping

Parameters:

qs - The Query statement

value - The object

Returns:

A Scalar Expression TODO Remove this when we drop legacy query mechanism