com.jcorporate.expresso.core.dbobj
Class DBObjectDef

java.lang.Object
  com.jcorporate.expresso.core.dbobj.DBObjectDef

All Implemented Interfaces:

DataObjectMetaData, JDBCObjectMetaData, Serializable

public class DBObjectDef

extends Object

implements JDBCObjectMetaData

This object contains the "definition" of the DBObject, while the DBObject itself contains only the data itself. One DBObjectDef object is stored in a static HashMap in the DBObject class, and is looked up and referenced for all definitions of the structure of the given object. since this class is not threadsafe for adding information, it is imperitive that all information addition, typically done when the first instance of a DBObject is instantiated, is done in a synchronized context.

Author:

Michael Nash

See Also:

Serialized Form

Constructor Summary

DBObjectDef()
Default Constructor.

Method Summary

void	addDetail(String objName, String keyFieldsLocal, String keyFieldsForeign) Specify a new "detail" db object, and the fields in this object they specify the fields in the related object
void	addField(String fieldName, String fieldType, int fieldSize, boolean allowNull, String fieldDescription) Add a field with more details: This version of addfield supplies the allowNull flags and a description of the field to be used when reporting errors to the user.
void	addField(String fieldName, String fieldType, int fieldSize, boolean allowNull, String descriptionKey, String fieldDescription) Add a field with more details: This version of addfield supplies the allowNull flags and a description of the field to be used when reporting errors to the user.
void	addField(String fieldName, String fieldType, int fieldSize, int fieldPrecision, boolean allowNull, String fieldDescription) Add a field with more details: This version allows the user to specify a precision, for fields that use both a size and precision.
void	addIndex(String indexName, String fieldNames, boolean isUnique) Add an index to the table.
void	addKey(String keyFieldName) Add a new field to the list of fields that are part of this object's key.
void	addTransition(Transition t) ??????
void	addVirtualField(String fieldName, String fieldType, int fieldSize, int fieldPrecision, boolean allowNull, String fieldDescription) Add a field with more details: This version allows the user to specify a precision, for fields that use both a size and precision.
void	addVirtualField(String fieldName, String fieldType, int fieldSize, int fieldPrecision, boolean allowNull, String descriptionKey, String fieldDescription) Add a field with more details: This version allows the user to specify a precision, for fields that use both a size and precision.
void	addVirtualField(String fieldName, String fieldType, int fieldSize, String fieldDescription) Add a new virtual field to the definition of this object.
void	addVirtualField(String fieldName, String fieldType, int fieldSize, String descriptionKey, String fieldDescription) Add a new virtual field to the definition of this object.
boolean	allowsNull(String fieldName) Returns whether the field allows null values or not.
boolean	checkZeroUpdate() Retrieves whether or not checkZeroUpdate is enabled for this data object
void	disableLogging() Disable change logging of this object
void	enableLogging() Enable logging of changes to this object.
Set	getAllAttributes(String fieldName) Retrieve all the attributes so you can iterate through them.
HashMap	getAllDBFields()
Hashtable	getAllFields() Deprecated. use getAllFieldsMap instead
Iterator	getAllFieldsIterator() Way to get an interator into the allFields objects
HashMap	getAllFieldsMap() Return the "allFields" Hashtable, which contains all of the DBField objects that make up this DB object.
Hashtable	getAllKeys() Deprecated. Use getAllKeysMap or getAllKeysIterator instead
Iterator	getAllKeysIterator() Non-threadsafe way to get an interator into the allKeys data structure
HashMap	getAllKeysMap() Return the "allKeys" hash, containing the DBField objects that make up the primary key for this db object.
Object	getAttribute(String fieldName, String attribName) Gets an Object attribute from the field's metatdata
Iterator	getAttributesIterator(String fieldName)
int	getCacheSize() Get the current Cache size of this object.
String	getCharset() return the current object's character set
DBField	getDBField(String fieldName) Get the DBField object specified by the fieldname
String	getDefaultValue(String fieldName) Retreive the default value of a particular field for when it is first instantiated
String	getDescription() Return a description of this database object.
String	getDescription(Locale l) Retrieve the table description in a localized way.
String	getDescription(Locale l, String fieldName) Retrieve an i18n'ized description as per the locale defined for the 'client'
String	getDescription(String fieldName) Return the long description of a field, if available
String	getDetailFieldsForeign(String detailName) Retrieve the foreign key fields
String	getDetailFieldsLocal(String detailName) Retrieve the local key fields.
Enumeration	getDetails()
Set	getDetailSet() Retrieve a set of detail objects.
Enumeration	getFieldList() Deprecated. Use getFieldListArray or getFieldListIterator instead
ArrayList	getFieldListArray() Get a list of all of the fields in this object This is threadsafe in that it makes a new copy of the fieldNamesInOrder ArrayList
Iterator	getFieldListIterator() Get a list of all of the fields in this object This iterator is not thread safe.
DataFieldMetaData	getFieldMetadata(String fieldName) Retrieve the metadata for the field.
String[]	getFields() This convenience method iterates through all the fields belonging to this DBObject returns an array of field names ( String ).
FilterManager	getFilterManager()
Object[]	getIndexArray() Get an array of DBIndex objects for purpose of creating them through the schema.
Enumeration	getKeyFieldList() Deprecated. Use getKeyFieldArray instead
ArrayList	getKeyFieldListArray() Get a list of all of the names of the key fields in this object
Iterator	getKeyFieldListIterator() Retrieve an interator of key fields
String	getLength(String fieldName) Return the length of a field
int	getLengthInt(String fieldName) Return the length of a field as an integer
String	getLookupField(String fieldName) When you get a lookup object, to perform a complete mapping between the two, you need to know what field name in the remote object maps to this field.
String	getLookupObject(String fieldName) Get a field's lookup object - this is the name of another database object that can be used to look up valid values for this object.
String	getName() Get the name of this object
int	getPrecision(String fieldName) Retrieve the precision of a particular field
String	getSchema() Retrieve the schema object's class name associated with this data object
String	getTargetTable() Return the Table Name of the current database object.
Iterator	getTransitionsIterator() ????????????
String	getType(String fieldName) Return the type of a field - this method returns the internal Expresso type
boolean	hasField(String fieldName) This method will return a boolean true if the field is defined in the DBOBject, false otherwise.
boolean	hasIndex() Returns true if an Index exists for this array.
boolean	isAllowsNull(String fieldName) Returns whether the field allows null values or not.
boolean	isField(String fieldName) Check if a certain name is a field (of any kind) in this DBOBject
String	isFieldIgnoreCase(String fieldName) Check if a certain name is a field (of any kind) in this DBOBject since SQL is case insensitive, ignore case of field name for match, this method takes longer, so use isField if the field name is known precisely
boolean	isLoggingEnabled() Retrieves whether or not change logging is enabled for a particular data object
boolean	isMultiValued(String fieldName) Method called to determine if a particular field is multi-valued, that is does it have a set of specific values and descriptions
boolean	isReadOnly(String fieldName) Is a given field readOnly - these fields are not offered for entry when a form is produced by the generic database maintenance servlet
boolean	isSecret(String fieldName) Is a given field 'secret' - these fields are not shown when a list is produced by the generic database maintenance servlet (DBMaint).
boolean	isVirtual(String fieldName) Is a given field virtual?
void	removeAttribute(String fieldName, String attribName) Removes an attribute from the field.
void	setAttribute(String fieldName, String attribName, Object attribValue)
void	setCacheSize(int newValue) Sets the cache size for this DBObject
void	setCharset(String newCharSet) Set a characterset for a particular field.
void	setCheckZeroUpdate(boolean newFlag) Turn on or off the facility to verify that when an update is made that at least one record got updated.
void	setDefaultValue(String fieldName, String fieldValue) Sets the default value for a particular field
void	setDescription(String newDescription) Set the description of this object
void	setLookupObject(String fieldName, String objectName) Set a field's lookup object - this is the name of another database object that can be used to look up valid values for this object.
void	setMask(String fieldName, String newMask) Sets the field's regular expression validation mask.
void	setMultiValued(String fieldName) Set this field to be multi-valued - e.g. there is a specific list of values that are valid for this field.
void	setName(String theName) Set the name of this object - this name is used to identify the db object with a more human-readable description
void	setReadOnly(String fieldName) Set a field as read-only - these fields are not offered for update when a form is produced by the generic database maintenance servlet (DBMaint).
void	setSchema(String schemaName)
void	setSecret(String fieldName) Set a field as 'secret' - these fields are not shown when a list is produced by the generic database maintenance servlet.
void	setStringFilter(String fieldName, String filterMethod) Set a filter for a particular field.
void	setTargetTable(String theTable) Set the target table for this DBObject.

Methods inherited from class java.lang.Object

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

Constructor Detail

DBObjectDef

public DBObjectDef()
            throws DBException

Default Constructor. This allows a DB object to be dynamically instantiated (e.g. loaded with Class.forName()) and does all of the required initializations.

Throws:

DBException

Method Detail

addField

public void addField(String fieldName,
                     String fieldType,
                     int fieldSize,
                     int fieldPrecision,
                     boolean allowNull,
                     String fieldDescription)
              throws DBException

Add a field with more details: This version allows the user to specify a precision, for fields that use both a size and precision.

Parameters:

fieldName - Name of the field

fieldType - Type of the field - this is the internal Expresso type, mapping in DBField to a specific database data type.

fieldSize - Size of the field

fieldPrecision - The precision of the field

allowNull - Does this field allow nulls?

fieldDescription - A longer description of this field (user-understandable hopefully!)

Throws:

DBException

setDefaultValue

public void setDefaultValue(String fieldName,
                            String fieldValue)
                     throws DBException

Sets the default value for a particular field

Parameters:

fieldName - The name of the field to set

fieldValue - the default value to use

Throws:

DBException - upon error

getDefaultValue

public String getDefaultValue(String fieldName)

Description copied from interface: DataObjectMetaData

Retreive the default value of a particular field for when it is first instantiated

Specified by:

getDefaultValue in interface DataObjectMetaData

Parameters:

fieldName - the name of the field to retrieve

Returns:

java.lang.String

addDetail

public void addDetail(String objName,
                      String keyFieldsLocal,
                      String keyFieldsForeign)
               throws DBException

Specify a new "detail" db object, and the fields in this object they specify the fields in the related object

Parameters:

objName - The class name of the related object. There is assumed to be a one to one or one to many relationship from this object to the specified object

keyFieldsLocal - A pipe-delimited list of field names in this object

keyFieldsForeign - A pipe-delimieted list of field names in the other object

Throws:

DBException

getDetails

public Enumeration getDetails()

getDetailFieldsLocal

public String getDetailFieldsLocal(String detailName)

Description copied from interface: DataObjectMetaData

Retrieve the local key fields.

Specified by:

getDetailFieldsLocal in interface DataObjectMetaData

Parameters:

detailName - the name of the detail dbobject

Returns:

java.lang.String

getDetailFieldsForeign

public String getDetailFieldsForeign(String detailName)

Description copied from interface: DataObjectMetaData

Retrieve the foreign key fields

Specified by:

getDetailFieldsForeign in interface DataObjectMetaData

Parameters:

detailName - the name of the detail dbobject

Returns:

java.lang.String

addField

public void addField(String fieldName,
                     String fieldType,
                     int fieldSize,
                     boolean allowNull,
                     String fieldDescription)
              throws DBException

Add a field with more details: This version of addfield supplies the allowNull flags and a description of the field to be used when reporting errors to the user. This method is only used by the class that extends DB object, and typically only in the setupFields() method.

Parameters:

fieldName - Name of the field

fieldType - Type of the field - this is the "internal" Expresso type, and is mapped to a specific type for the database depending on the mappings in the properties file (if any). The DBField object contains the default mappings.

fieldSize - Size of this field, if specified for this type of field. For fields that do not use a size (such as "date"), specify 0 for the size.

allowNull - Does this field allow nulls?

fieldDescription - A longer description of this field (user-understandable hopefully!)

Throws:

DBException

addField

public void addField(String fieldName,
                     String fieldType,
                     int fieldSize,
                     boolean allowNull,
                     String descriptionKey,
                     String fieldDescription)
              throws DBException

Add a field with more details: This version of addfield supplies the allowNull flags and a description of the field to be used when reporting errors to the user. This method is only used by the class that extends DB object, and typically only in the setupFields() method.

Parameters:

fieldName - Name of the field

fieldType - Type of the field - this is the "internal" Expresso type, and is mapped to a specific type for the database depending on the mappings in the properties file (if any). The DBField object contains the default mappings.

fieldSize - Size of this field, if specified for this type of field. For fields that do not use a size (such as "date"), specify 0 for the size.

allowNull - Does this field allow nulls?

descriptionKey - Key into the local language files for this field's description

fieldDescription - A longer description of this field (user-understandable hopefully!)

Throws:

DBException

allowsNull

public boolean allowsNull(String fieldName)
                   throws DBException

Returns whether the field allows null values or not.

Parameters:

fieldName - name of the field

Returns:

true if the field allows null

Throws:

DBException

setMask

public void setMask(String fieldName,
                    String newMask)
             throws DBException

Sets the field's regular expression validation mask. It also precompiles the regular expression when it is called.

Parameters:

fieldName - The field name to associate with this regular expression

newMask - The actual regular expression.

Throws:

DBException

removeAttribute

public void removeAttribute(String fieldName,
                            String attribName)

Removes an attribute from the field.

Specified by:

removeAttribute in interface DataObjectMetaData

Parameters:

fieldName - the name of the field to remove the attribute

attribName - the attribute name to remove

setAttribute

public void setAttribute(String fieldName,
                         String attribName,
                         Object attribValue)
                  throws DBException

Specified by:

setAttribute in interface DataObjectMetaData

Parameters:

fieldName - the name of the field to set the attribute for

attribName - the name of the attribute to set

attribValue - the attribute to set

Throws:

DBException

getAttribute

public Object getAttribute(String fieldName,
                           String attribName)
                    throws DBException

Gets an Object attribute from the field's metatdata

Specified by:

getAttribute in interface DataObjectMetaData

Parameters:

fieldName - the name of the field for the attribute

attribName - the name of the attribute

Returns:

java.lang.Object

Throws:

DBException

getAttributesIterator

public Iterator getAttributesIterator(String fieldName)
                               throws DBException

Throws:

DBException

addIndex

public void addIndex(String indexName,
                     String fieldNames,
                     boolean isUnique)
              throws IllegalArgumentException

Add an index to the table.

Parameters:

indexName - the name to give the index in the table

fieldNames - A comma delimited list of all fields in the index.

isUnique - - True if this field is a unique index.

Throws:

IllegalArgumentException - of fieldName is null or doesn't exist or if indexName is null

addKey

public void addKey(String keyFieldName)
            throws DBException

Add a new field to the list of fields that are part of this object's key. Called after all of the "addField" calls in the setupFields() method to specify which fields make up the primary key of this object.

Parameters:

keyFieldName - The name of the field to add as part of the key

Throws:

DBException - if the field name is not valid or the field allows nulls

addVirtualField

public void addVirtualField(String fieldName,
                            String fieldType,
                            int fieldSize,
                            String fieldDescription)
                     throws DBException

Add a new virtual field to the definition of this object. A virtual field is just like a regular one, except it's not stored in the target table A normal call to getField or setField on a virtual field will throw an exception - getField and setField should be extended to handle the virtual fields for a particular object correctly.

Parameters:

fieldName - Name of the field

fieldType - Database type of the field

fieldSize - Size of the field in characters

fieldDescription - A longer description of this field (user-understandable hopefully!)

Throws:

DBException

addVirtualField

public void addVirtualField(String fieldName,
                            String fieldType,
                            int fieldSize,
                            String descriptionKey,
                            String fieldDescription)
                     throws DBException

Add a new virtual field to the definition of this object. A virtual field is just like a regular one, except it's not stored in the target table A normal call to getField or setField on a virtual field will throw an exception - getField and setField should be extended to handle the virtual fields for a particular object correctly.

Parameters:

fieldName - Name of the field

fieldType - Database type of the field

fieldSize - Size of the field in characters

descriptionKey - Key into the local language files for the description of this field.

fieldDescription - A longer description of this field (user-understandable hopefully!)

Throws:

DBException

addVirtualField

public void addVirtualField(String fieldName,
                            String fieldType,
                            int fieldSize,
                            int fieldPrecision,
                            boolean allowNull,
                            String fieldDescription)
                     throws DBException

Add a field with more details: This version allows the user to specify a precision, for fields that use both a size and precision.

Parameters:

fieldName - Name of the field

fieldType - Type of the field - this is the internal Expresso type, mapping in DBField to a specific database data type.

fieldSize - Size of the field

fieldPrecision - The precision of the field

allowNull - Does this field allow nulls?

fieldDescription - A longer description of this field (user-understandable hopefully!)

Throws:

DBException

addVirtualField

public void addVirtualField(String fieldName,
                            String fieldType,
                            int fieldSize,
                            int fieldPrecision,
                            boolean allowNull,
                            String descriptionKey,
                            String fieldDescription)
                     throws DBException

Add a field with more details: This version allows the user to specify a precision, for fields that use both a size and precision.

Parameters:

fieldName - Name of the field

fieldType - Type of the field - this is the internal Expresso type, mapping in DBField to a specific database data type.

fieldSize - Size of the field

fieldPrecision - The precision of the field

allowNull - Does this field allow nulls?

descriptionKey - Key into the local langauge files with a description of this field

fieldDescription - A longer description of this field (user-understandable hopefully!)

Throws:

DBException

disableLogging

public void disableLogging()

Disable change logging of this object

Specified by:

disableLogging in interface DataObjectMetaData

enableLogging

public void enableLogging()

Enable logging of changes to this object. Change logging writes an entry to the ChangeLog object every time an add, update, or delete is made to this object. It is used to track important tables, such as user information, account information, etc.

Specified by:

enableLogging in interface DataObjectMetaData

isLoggingEnabled

public boolean isLoggingEnabled()

Description copied from interface: DataObjectMetaData

Retrieves whether or not change logging is enabled for a particular data object

Specified by:

isLoggingEnabled in interface DataObjectMetaData

Returns:

boolean true if logging is enabled.

getAllFields

public Hashtable getAllFields()

Deprecated. use getAllFieldsMap instead

Return the "allFields" Hashtable, which contains all of the DBField objects that make up this DB object.

Returns:

Hashtable

isFieldIgnoreCase

public String isFieldIgnoreCase(String fieldName)

Check if a certain name is a field (of any kind) in this DBOBject since SQL is case insensitive, ignore case of field name for match, this method takes longer, so use isField if the field name is known precisely

Specified by:

isFieldIgnoreCase in interface DataObjectMetaData

Parameters:

fieldName - the name of the field to check

Returns:

internal format for field name if matched, or null if no match

isField

public boolean isField(String fieldName)

Check if a certain name is a field (of any kind) in this DBOBject

Specified by:

isField in interface DataObjectMetaData

Parameters:

fieldName - the name of the field to check

Returns:

true if the field name exists

getAllFieldsMap

public HashMap getAllFieldsMap()

Return the "allFields" Hashtable, which contains all of the DBField objects that make up this DB object.

Specified by:

getAllFieldsMap in interface DataObjectMetaData

Returns:

java.util.HashMap

getAllDBFields

public HashMap getAllDBFields()

getAllFieldsIterator

public Iterator getAllFieldsIterator()

Way to get an interator into the allFields objects

Returns:

an Iterator into the allFields HashMap

getKeyFieldListIterator

public Iterator getKeyFieldListIterator()

Retrieve an interator of key fields

Returns:

Iterator of key fields. [MetaData]

getAllKeys

public Hashtable getAllKeys()

Deprecated. Use getAllKeysMap or getAllKeysIterator instead

Return the "allKeys" hash, containing the DBField objects that make up the primary key for this db object.

Returns:

java.util.Hashtable

getAllKeysMap

public HashMap getAllKeysMap()

Return the "allKeys" hash, containing the DBField objects that make up the primary key for this db object.

Specified by:

getAllKeysMap in interface DataObjectMetaData

Returns:

java.util.HashMap

getAllKeysIterator

public Iterator getAllKeysIterator()

Non-threadsafe way to get an interator into the allKeys data structure

Returns:

java.util.Iterator of key fields (DBField)

getCharset

public String getCharset()

return the current object's character set

Specified by:

getCharset in interface DataObjectMetaData

Returns:

java.lang.String

getCacheSize

public int getCacheSize()

Get the current Cache size of this object. or -2 if it hasn't been defined yet.

Specified by:

getCacheSize in interface DataObjectMetaData

Returns:

current cache size value.

setCacheSize

public void setCacheSize(int newValue)

Sets the cache size for this DBObject

Specified by:

setCacheSize in interface DataObjectMetaData

Parameters:

newValue - the new value. Must be >= -2

Throws:

IllegalArgumentException - if newValue < -2

setCharset

public void setCharset(String newCharSet)
                throws DBException

Set a characterset for a particular field.

Parameters:

newCharSet - The name of the characterset that you will filter against. For Western-Latin character sets use "ISO-8859-1" as the parameter. Currently, no other charactersets are implemented.

Throws:

DBException - upon error

See Also:

for more information on Filters and implementing Filters for your own characterset. Sets the characterset expected for a this DB object. A Table's default is "ISO-8859-1", Filter, ISO_8859_1

getDescription

public String getDescription()

Return a description of this database object. If no explicit description has been set, return the class name.

Specified by:

getDescription in interface DataObjectMetaData

Returns:

A string describing this database object

getDescription

public String getDescription(Locale l)

Retrieve the table description in a localized way. If l == null, the function uses the system locale to generate the value. If unable to locate the key in the message bundle, the key becomes the return value.

Specified by:

getDescription in interface DataObjectMetaData

Parameters:

l - the Locale to use for rendering the table description

Returns:

java.lang.String

getDescription

public String getDescription(String fieldName)
                      throws DBException

Return the long description of a field, if available

Specified by:

getDescription in interface DataObjectMetaData

Parameters:

fieldName - The name of the field

Returns:

String: The long description of the field (user-readable)

Throws:

DBException - If there is no such field

getDescription

public String getDescription(Locale l,
                             String fieldName)

Retrieve an i18n'ized description as per the locale defined for the 'client'

Specified by:

getDescription in interface DataObjectMetaData

Parameters:

l - the Locale to use. If null, will use the System default Locale

fieldName - the name of the field to retrieve the i18n'ized description for.

Returns:

an i18n'ized string. K

getDBField

public DBField getDBField(String fieldName)

Get the DBField object specified by the fieldname

Parameters:

fieldName - the name of the field to retrieve

Returns:

DBField object

getFieldList

public Enumeration getFieldList()

Deprecated. Use getFieldListArray or getFieldListIterator instead

Get a list of all of the fields in this object

Returns:

A Vector of all of the fieldNames in this object

getFieldListArray

public ArrayList getFieldListArray()

Get a list of all of the fields in this object This is threadsafe in that it makes a new copy of the fieldNamesInOrder ArrayList

Specified by:

getFieldListArray in interface DataObjectMetaData

Returns:

A Vector of all of the fieldNames in this object

getFieldListIterator

public Iterator getFieldListIterator()

Get a list of all of the fields in this object This iterator is not thread safe.

Returns:

An iterator of the fieldNamesInOrder array list

getKeyFieldList

public Enumeration getKeyFieldList()

Deprecated. Use getKeyFieldArray instead

Get a list of all of the names of the key fields in this object

Returns:

A Vector of all of the names of the key fields

getKeyFieldListArray

public ArrayList getKeyFieldListArray()

Get a list of all of the names of the key fields in this object

Specified by:

getKeyFieldListArray in interface DataObjectMetaData

Returns:

An ArrayList of all of the names of the key fields

getLength

public String getLength(String fieldName)
                 throws DBException

Return the length of a field

Specified by:

getLength in interface DataObjectMetaData

Parameters:

fieldName - The name of the field

Returns:

String: The length of the field

Throws:

DBException - If there is no such field in this object

getLengthInt

public int getLengthInt(String fieldName)
                 throws DBException

Description copied from interface: DataObjectMetaData

Return the length of a field as an integer

Specified by:

getLengthInt in interface DataObjectMetaData

Parameters:

fieldName - The name of the field

Returns:

integer: The length of the field

Throws:

DBException - If there is no such field in this object

getPrecision

public int getPrecision(String fieldName)
                 throws DBException

Description copied from interface: DataObjectMetaData

Retrieve the precision of a particular field

Specified by:

getPrecision in interface DataObjectMetaData

Parameters:

fieldName - The name of the field

Returns:

integer for demcimal precision of the field

Throws:

DBException

getLookupObject

public String getLookupObject(String fieldName)
                       throws DBException

Get a field's lookup object - this is the name of another database object that can be used to look up valid values for this object. The lookup object for a field is set in the db objects setupFields method, and is used by the DBMaint servlet to provide automatic lookup links for fields.

Specified by:

getLookupObject in interface DataObjectMetaData

Parameters:

fieldName - Field name to check

Returns:

String specifying the className of the lookup object

Throws:

DBException - If the specified field does not exist.

getLookupField

public String getLookupField(String fieldName)

When you get a lookup object, to perform a complete mapping between the two, you need to know what field name in the remote object maps to this field.

Specified by:

getLookupField in interface DataObjectMetaData

Parameters:

fieldName - the name of the field to look up.

Returns:

java.lang.String or null if there is no lookup field

Throws:

IllegalArgumentException - if the field name does not exist

getName

public String getName()

Get the name of this object

Specified by:

getName in interface DataObjectMetaData

Returns:

String The database object name, or the table name if none has been assigned

getTargetTable

public String getTargetTable()
                      throws DataException

Return the Table Name of the current database object. Keep in mind that a database object could update or affect other tables as well.

Specified by:

getTargetTable in interface JDBCObjectMetaData

Returns:

String: Table name of the target table of this database object

Throws:

DataException - upon error

getType

public String getType(String fieldName)
               throws DBException

Return the type of a field - this method returns the internal Expresso type

Specified by:

getType in interface DataObjectMetaData

Parameters:

fieldName - The name of the field

Returns:

String: The type of the field

Throws:

DBException - If there is no such field in this object

getIndexArray

public Object[] getIndexArray()

Get an array of DBIndex objects for purpose of creating them through the schema. Return type should actually be DBIndex. Please Note This may cause an exception to be thrown if indexList is null. Call hasIndex() first before calling getIndexArray

Returns:

Object[]

hasIndex

public boolean hasIndex()

Returns true if an Index exists for this array.

Specified by:

hasIndex in interface JDBCObjectMetaData

Returns:

true if it has an index

hasField

public boolean hasField(String fieldName)

This method will return a boolean true if the field is defined in the DBOBject, false otherwise. Creation date: (8/8/00 11:04:32 AM)

Specified by:

hasField in interface DataObjectMetaData

Parameters:

fieldName - java.lang.String

Returns:

boolean

getFilterManager

public FilterManager getFilterManager()

isMultiValued

public boolean isMultiValued(String fieldName)
                      throws DBException

Method called to determine if a particular field is multi-valued, that is does it have a set of specific values and descriptions

Specified by:

isMultiValued in interface DataObjectMetaData

Parameters:

fieldName - Name of the field

Returns:

boolean True if the field is multi-valued, false if not

Throws:

DBException - If there is no such field

isReadOnly

public boolean isReadOnly(String fieldName)
                   throws DBException

Is a given field readOnly - these fields are not offered for entry when a form is produced by the generic database maintenance servlet

Specified by:

isReadOnly in interface DataObjectMetaData

Parameters:

fieldName - name of the field to check

Returns:

true of the field is "read only", false if it is not

Throws:

DBException - Ff there is no such field

isSecret

public boolean isSecret(String fieldName)
                 throws DBException

Is a given field 'secret' - these fields are not shown when a list is produced by the generic database maintenance servlet (DBMaint). This means that only users with update permission to the record can see the value of the specified field.

Specified by:

isSecret in interface DataObjectMetaData

Parameters:

fieldName - The name of the field to check

Returns:

True if the field is 'secret', false if it is not

Throws:

DBException - If there is no such field.

See Also:

setSecret(String)

isVirtual

public boolean isVirtual(String fieldName)
                  throws DBException

Is a given field virtual? A virtual field is not stored in the target table for this object - it may be computed, or stored in another table.

Specified by:

isVirtual in interface DataObjectMetaData

Parameters:

fieldName - The name of the field to check

Returns:

True of the field is virtual, false if it is not

Throws:

DBException - If there is no such field

See Also:

addVirtualField(String, String, int, String)

setCheckZeroUpdate

public void setCheckZeroUpdate(boolean newFlag)

Turn on or off the facility to verify that when an update is made that at least one record got updated. If this flag is on, and no records get updated, the update() method throws an Exception. Note that for some databases, if the existing record is not changed (e.g. it was already identical to what was being updated) this counts "no update" (notably, mySQL does this).

Specified by:

setCheckZeroUpdate in interface DataObjectMetaData

Parameters:

newFlag - True to turn on checking, false to turn it off

checkZeroUpdate

public boolean checkZeroUpdate()

Description copied from interface: DataObjectMetaData

Retrieves whether or not checkZeroUpdate is enabled for this data object

Specified by:

checkZeroUpdate in interface DataObjectMetaData

Returns:

true if checkZeroUpdate() is enabled

setDescription

public void setDescription(String newDescription)

Set the description of this object

Parameters:

newDescription - A description of this database object

setLookupObject

public void setLookupObject(String fieldName,
                            String objectName)
                     throws DBException

Set a field's lookup object - this is the name of another database object that can be used to look up valid values for this object. This value is used by the DBMaint servlet to provide automatic lookup ability for related fields.

Parameters:

fieldName - The field name that this lookup is associated with

objectName - The db object used to look up valid values for this field.

Throws:

DBException

setMultiValued

public void setMultiValued(String fieldName)
                    throws DBException

Set this field to be multi-valued - e.g. there is a specific list of values that are valid for this field. There should be code in the getValidValues method that returns the valid values for the specified multi-valued field.

Parameters:

fieldName - The name of the field to specify as multi-valued

Throws:

DBException - If the field name given is not valid, or is a virtual field

setName

public void setName(String theName)

Set the name of this object - this name is used to identify the db object with a more human-readable description

Parameters:

theName - New name for this object

setReadOnly

public void setReadOnly(String fieldName)
                 throws DBException

Set a field as read-only - these fields are not offered for update when a form is produced by the generic database maintenance servlet (DBMaint). It does not otherwise affect the use of the field.

Typical uses are for serial-numbered fields and timestamps

Parameters:

fieldName - The name of the field to be reserved as normally read-only.

Throws:

DBException - If there is no such field.

setSecret

public void setSecret(String fieldName)
               throws DBException

Set a field as 'secret' - these fields are not shown when a list is produced by the generic database maintenance servlet. In this way, only users with update permission to the object can view the values of "secret" fields.

Parameters:

fieldName - The name of the field to set as 'secret'

Throws:

DBException - if the field does not exist

setStringFilter

public void setStringFilter(String fieldName,
                            String filterMethod)
                     throws DBException

Set a filter for a particular field. Check the documentation at

Parameters:

fieldName - The name of the field to set a particular filter for.

filterMethod - The name of the filter method to use when calling a filter. Can be one of three values:
See @see com.jcorporate.expresso.core.security.filters.FilterManager.filterString for more information on this parameter.

Throws:

DBException - if: fieldName doesn't exist, or filterType String isn't a valid value.

See Also:

for more information on Filters and implementing Filters for your own characterset.

setTargetTable

public void setTargetTable(String theTable)
                    throws DBException

Set the target table for this DBObject. Note that an object can span tables by the use of virtual fields, but that this table is the default table for the object.

Parameters:

theTable - Table for this object

Throws:

DBException

setSchema

public void setSchema(String schemaName)

Parameters:

schemaName - the name of the schema

getSchema

public String getSchema()

Description copied from interface: DataObjectMetaData

Retrieve the schema object's class name associated with this data object

Specified by:

getSchema in interface DataObjectMetaData

Returns:

the className of the schema associated with this DBObject

getFields

public String[] getFields()

This convenience method iterates through all the fields belonging to this DBObject returns an array of field names ( String ).

Specified by:

getFields in interface DataObjectMetaData

Returns:

String array of all field names in this object. author Peter Pilgrim

See Also:

getFieldList()

addTransition

public void addTransition(Transition t)
                   throws DBException

??????

Parameters:

t - ???

Throws:

DBException

getTransitionsIterator

public Iterator getTransitionsIterator()
                                throws DBException

????????????

Returns:

Iterator to the TransitionTabs

Throws:

DBException

getDetailSet

public Set getDetailSet()

Retrieve a set of detail objects.

Specified by:

getDetailSet in interface DataObjectMetaData

Returns:

java.util.Set

isAllowsNull

public boolean isAllowsNull(String fieldName)
                     throws DBException

Returns whether the field allows null values or not.

Specified by:

isAllowsNull in interface DataObjectMetaData

Parameters:

fieldName - name of the field

Returns:

true if the field allows null

Throws:

DBException

getFieldMetadata

public DataFieldMetaData getFieldMetadata(String fieldName)

Retrieve the metadata for the field.

Specified by:

getFieldMetadata in interface DataObjectMetaData

Parameters:

fieldName - the name of the field to retrieve the metadata for.

Returns:

DataFieldMetaData instance for the specified field name.

getAllAttributes

public Set getAllAttributes(String fieldName)

Retrieve all the attributes so you can iterate through them.

Specified by:

getAllAttributes in interface DataObjectMetaData

Parameters:

fieldName - the name of the field to retrieve.

Returns:

java.util.Set of all the attribute names for the given field.