org.makumba
Interface DataDefinition

All Known Implementing Classes:

DataDefinitionImpl, FileRecordInfo, RecordInfo

public interface DataDefinition

Information about a makumba data definition as obtained from an MDD file or the structure of an MQL query result. This class is provided for makumba programs to be able to introspect makumba data structures. Such introspection is not needed usually, as the application programmer knows the makumba data structure.

Nested Class Summary

static class	DataDefinition.MultipleUniqueKeyDefinition Data structure holding the definition of a mult-field unique key.
static class	DataDefinition.QueryFragmentFunction

Field Summary

static String	createName
static String	modifyName

Method Summary

void	addField(FieldDefinition fd) Add a new field definition.
void	addMultiUniqueKey(DataDefinition.MultipleUniqueKeyDefinition definition) Add a multiple-feld uniqueness definition.
void	checkFieldNames(Dictionary<String,Object> d) Checks whether all fieldnames exist in the database
void	checkUpdate(String fieldName, Dictionary<String,Object> d) Checks whether a record can be updated *
String	getCreationDateFieldName() The name of the creation timestamp field, if any?
FieldDefinition	getFieldDefinition(int n) the field with the respective index, null if such a field doesn't exist
FieldDefinition	getFieldDefinition(String name) the field with the respective name, null if such a field doesn't exist
Vector<String>	getFieldNames() the names of the fields declared in this data definition, in the order of declaration
FieldDefinition	getFieldOrPointedFieldDefinition(String name) Returns a field definition that is either contained in this data definition, or in a pointed type.
DataDefinition.QueryFragmentFunction	getFunctionOrPointedFunction(String name) Returns a query function that is either contained in this data definition, or in a pointed type.
QueryFragmentFunctions	getFunctions() returns all functions in this data definition.
String	getIndexPointerFieldName() The name of the index field (primary key), if any?
String	getLastModificationDateFieldName() The name of the modification timestamp field, if any?
DataDefinition.MultipleUniqueKeyDefinition[]	getMultiFieldUniqueKeys() Get all multiple-feld uniqueness definition.
String	getName() name of this data definition
FieldDefinition	getParentField() If this type is the data pointed to by a 1-1 pointer or subset, return the field definition in the main record, otherwise return null
ArrayList<FieldDefinition>	getReferenceFields() Gets all the fields that are references to other tables, i.e. pointers and some types of sets.
String	getSetMemberFieldName() The name of the set member (Pointer, Character or Integer), for set subtypes
String	getSetOwnerFieldName() The name of the pointer to the main table, for set and internal set subtypes
String	getTitleFieldName() The title field indicated, or the default one
ArrayList<FieldDefinition>	getUniqueFields() Gets all the fields that have the unique modifier.
ValidationDefinition	getValidationDefinition() Get the validation definition associated with this data definition.
boolean	hasMultiUniqueKey(String[] fieldNames) Check whether this data definition has a multi-field uniqe key defined with the given fields.
boolean	isTemporary() tells whether this data definition was generated temporarily to depict a query result as opposed to being read from an MDD file
long	lastModified() Indicates when the data definition was modified the last time

Field Detail

createName

static final String createName

See Also:

Constant Field Values

modifyName

static final String modifyName

See Also:

Constant Field Values

Method Detail

getName

String getName()

name of this data definition

getFieldNames

Vector<String> getFieldNames()

the names of the fields declared in this data definition, in the order of declaration

getFieldDefinition

FieldDefinition getFieldDefinition(String name)

the field with the respective name, null if such a field doesn't exist

getFieldDefinition

FieldDefinition getFieldDefinition(int n)

the field with the respective index, null if such a field doesn't exist

getFieldOrPointedFieldDefinition

FieldDefinition getFieldOrPointedFieldDefinition(String name)

Returns a field definition that is either contained in this data definition, or in a pointed type.

getFunctionOrPointedFunction

DataDefinition.QueryFragmentFunction getFunctionOrPointedFunction(String name)

Returns a query function that is either contained in this data definition, or in a pointed type.

isTemporary

boolean isTemporary()

tells whether this data definition was generated temporarily to depict a query result as opposed to being read from an MDD file

getTitleFieldName

String getTitleFieldName()

The title field indicated, or the default one

getIndexPointerFieldName

String getIndexPointerFieldName()

The name of the index field (primary key), if any?

getCreationDateFieldName

String getCreationDateFieldName()

The name of the creation timestamp field, if any?

getLastModificationDateFieldName

String getLastModificationDateFieldName()

The name of the modification timestamp field, if any?

getParentField

FieldDefinition getParentField()

If this type is the data pointed to by a 1-1 pointer or subset, return the field definition in the main record, otherwise return null

getSetMemberFieldName

String getSetMemberFieldName()

The name of the set member (Pointer, Character or Integer), for set subtypes

getSetOwnerFieldName

String getSetOwnerFieldName()

The name of the pointer to the main table, for set and internal set subtypes

addField

void addField(FieldDefinition fd)

Add a new field definition. Works only for temporary data definitions

checkFieldNames

void checkFieldNames(Dictionary<String,Object> d)

Checks whether all fieldnames exist in the database

checkUpdate

void checkUpdate(String fieldName,
                 Dictionary<String,Object> d)

Checks whether a record can be updated *

lastModified

long lastModified()

Indicates when the data definition was modified the last time

getValidationDefinition

ValidationDefinition getValidationDefinition()

Get the validation definition associated with this data definition.

getMultiFieldUniqueKeys

DataDefinition.MultipleUniqueKeyDefinition[] getMultiFieldUniqueKeys()

Get all multiple-feld uniqueness definition.

addMultiUniqueKey

void addMultiUniqueKey(DataDefinition.MultipleUniqueKeyDefinition definition)

Add a multiple-feld uniqueness definition.

hasMultiUniqueKey

boolean hasMultiUniqueKey(String[] fieldNames)

Check whether this data definition has a multi-field uniqe key defined with the given fields.

getReferenceFields

ArrayList<FieldDefinition> getReferenceFields()

Gets all the fields that are references to other tables, i.e. pointers and some types of sets.

getUniqueFields

ArrayList<FieldDefinition> getUniqueFields()

Gets all the fields that have the unique modifier.

getFunctions

QueryFragmentFunctions getFunctions()

returns all functions in this data definition.