oracle.cabo.ui.collection
Class IndexedAttributeMap

java.lang.Object
  |
  +--oracle.cabo.ui.collection.ArrayAttributeMap
        |
        +--oracle.cabo.ui.collection.IndexedAttributeMap

All Implemented Interfaces:

AttributeMap

public final class IndexedAttributeMap

extends ArrayAttributeMap

ArrayAttributeMap that stores the values of indexed AttributeKeys in a separate array. Thus, the storage and retrieval of indexed AttributeKey values is as fast as possible, at the cost of a moderate minimum allocation cost. This implementation also speeds up the storage and retrieval of unindexed AttributeKeys since indexed AttributeKey/value pairs do not appear in unindexed AttributeKey/value pair array, thus speeding linear searching of that array.

In general FlaggedAttributeMap is a better compromise between performance and memory use for most UINodes, while the IndexedAttributeMap is best used as storage for UINodes receiving large numbers of gets, such as table stamps, or composite UINode implementations. The DictionaryAttributeMap is typically only a better choice when extremely large numbers of unindexed AttributeKeys are stored in a UINode.

See Also:

FlaggedAttributeMap, DictionaryAttributeMap

Constructor Summary

IndexedAttributeMap()

IndexedAttributeMap(int size)

IndexedAttributeMap(int size, int increment)

Method Summary

java.lang.Object	getAttribute(RenderingContext context, AttributeKey key) Returns the value in the AttributeMap specified by the key.
void	setAttribute(AttributeKey key, java.lang.Object value) Sets an attribute value specified by the key to the new value.

Methods inherited from class oracle.cabo.ui.collection.ArrayAttributeMap

attributeKeys, clone, putAttribute, removeAttribute, size, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexedAttributeMap

public IndexedAttributeMap()

IndexedAttributeMap

public IndexedAttributeMap(int size)

IndexedAttributeMap

public IndexedAttributeMap(int size,
                           int increment)

Method Detail

getAttribute

public java.lang.Object getAttribute(RenderingContext context,
                                     AttributeKey key)

Description copied from interface: AttributeMap

Returns the value in the AttributeMap specified by the key.

Overrides:

getAttribute in class ArrayAttributeMap

setAttribute

public void setAttribute(AttributeKey key,
                         java.lang.Object value)

Description copied from interface: AttributeMap

Sets an attribute value specified by the key to the new value.

Overrides:

setAttribute in class ArrayAttributeMap