jalse.attributes

Class AttributeType<T>

java.lang.Object

jalse.attributes.AttributeType<T>

Type Parameters:

T - Value type.

public abstract class AttributeType<T>
extends java.lang.Object

AttributeTypes and their values can be considered the core data of the JALSE model. AttributeType defines what type the data must be. AttributeContainer is an attribute container where attributes can be stored and AttributeListener can be set to trigger on value updates.

For simple value types (no type arguments) Attributes.newTypeOf(Class) can be used:

 
 AttributeType <String> stringType = Attributes.newTypeOf(String.class);
 
 

For more complex types an anonymous (or declared) subclasses should be created supplying the intended value type as the type argument. This is needed so full generic type information can be retrieved then raw and parameterised types can be differentiated:

 
 AttributeType <Collection<String>> colStringType = new AttributeType <Collection<String>>(){};
 
 

When using reflection or where type erasure is not possible Attributes.newUnknownType(Type) can be used. This will be unique to the type not to Object.class.

AttributeTypes are meant to be easily distinguishable but for full generic information a Anonymous class is needed. To ensure this behaviour and so that AttributeType can be used as a unique key equals(Object), hashCode() and getValueType() are all final.

See Also:

AttributeContainer, AttributeListener, DefaultAttributeContainer, Attributes

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.reflect.Type	valueType Attribute value type.

Constructor Summary

Constructors

Constructor and Description
AttributeType() Creates a new instance of Attribute type (using generic type information).

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
java.lang.reflect.Type	getValueType() Gets attribute value type.
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

valueType

protected final java.lang.reflect.Type valueType

Attribute value type.

Constructor Detail

AttributeType

public AttributeType()
              throws java.lang.IllegalStateException

Creates a new instance of Attribute type (using generic type information).

Throws:

java.lang.IllegalStateException

Method Detail

equals

public final boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

getValueType

public final java.lang.reflect.Type getValueType()

Gets attribute value type.

Returns:

Value type.

hashCode

public final int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object