com.steptools.stdev

Class Attribute

java.lang.Object

com.steptools.stdev.Attribute

public abstract class Attribute
extends Object

Representation of an attribute of an EXPRESS entity

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Attribute()

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract Object	get(EntityInstance inst)
abstract String	getName() Gets the name of the attribute.
EntityDomain	getOwner() Get the domain that defines the attribute.
protected abstract Class	getOwnerClass()
Object	getValue(EntityInstance inst) Retrieves an attribute value in a late-bound fashion.
boolean	isAggregate() Determines if the type of the attribute is an Aggregate type.
boolean	isBoolean() Determines if the type of the attribute is a boolean
boolean	isEntity() Determines if the type of the attribute is an Entity type.
boolean	isInteger() Determines if the type of the attribute is an INTEGER type.
boolean	isLogical() Determines if the type of the attribute is a boolean
boolean	isReal() Determines if the type of the attribute is a REAL type.
boolean	isSelect() Determines if the type of the attribute is a Select type.
boolean	isString() Determines if the type of the attribute is a STRING type.
protected abstract void	set(EntityInstance inst, Object val)
void	setValue(EntityInstance inst, Object val) Sets an attribute value of an entity instance in a late-bound fashon The preferred, early-bound, operation for settting attribute values is to call the setXXX) method on subtype of the EntityInstace object.
abstract Class	slotClass() Reserved for EXPRESS generated classes
Domain	slotDomain() Get the domain for the type of the attribute.

Methods inherited from class java.lang.Object

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

Constructor Detail

Attribute

protected Attribute()

Method Detail

slotClass

public abstract Class slotClass()

Reserved for EXPRESS generated classes

slotDomain

public Domain slotDomain()

Get the domain for the type of the attribute.

Returns:

The domain of the attribute type.

get

protected abstract Object get(EntityInstance inst)

set

protected abstract void set(EntityInstance inst,
       Object val)

getOwnerClass

protected abstract Class getOwnerClass()

getOwner

public EntityDomain getOwner()

Get the domain that defines the attribute. This will always return the entity that ultimately defined the attribute in the EXPRESS, regardless of any redeclarations of the attribute

Returns:

The domain for the defining Entity.

isBoolean

public boolean isBoolean()

Determines if the type of the attribute is a boolean

Returns:

true if the attribute value is a boolean.

isLogical

public boolean isLogical()

Determines if the type of the attribute is a boolean

Returns:

true if the attribute value is a boolean.

isEntity

public boolean isEntity()

Determines if the type of the attribute is an Entity type.

Returns:

true if the attribute value is an entity.

isSelect

public boolean isSelect()

Determines if the type of the attribute is a Select type.

Returns:

true if the attribute value is a Select type.

isAggregate

public boolean isAggregate()

Determines if the type of the attribute is an Aggregate type.

Returns:

true if the attribute value is an Aggregate type.

isReal

public boolean isReal()

Determines if the type of the attribute is a REAL type.

Returns:

true if the attribute value is an REAL type.

isInteger

public boolean isInteger()

Determines if the type of the attribute is an INTEGER type.

Returns:

true if the attribute value is an Aggregate type.

isString

public boolean isString()

Determines if the type of the attribute is a STRING type.

Returns:

true if the attribute value is an Aggregate type.

setValue

public void setValue(EntityInstance inst,
            Object val)

Sets an attribute value of an entity instance in a late-bound fashon The preferred, early-bound, operation for settting attribute values is to call the setXXX) method on subtype of the EntityInstace object.

Parameters:

inst - The instance getting updated.

val - The value to set the attribute to. For integer and double, the value must be wrapped up in a java.lang.Integer or java.lang.Double. For all other types, the value is passed in directly.

Throws:

TypeException - The type of val cannot be assigned to the type of the attribute.

getName

public abstract String getName()

Gets the name of the attribute.

Returns:

The attribute name.

getValue

public Object getValue(EntityInstance inst)

Retrieves an attribute value in a late-bound fashion. The preferred, early-bound operation for getting attribute values is to call the getXXX) method on subtype of the EntityInstace object.

Parameters:

inst - The EntityInstance to get the attribute from.

Returns:

The value for the attribute. If the value is a double, or int, it is wrapped in a java.lang.Double or java.lang.Integer, unless the value is unset. Other types are returned literally If the attribute is unset, null is returned.

Throws:

TypeException - if inst is not an instance of the entity that owns this attribute.