org.garret.jsql
Class TreeIterator

java.lang.Object
  org.garret.jsql.L2Elem
      org.garret.jsql.ListIterator
          org.garret.jsql.TreeIterator

All Implemented Interfaces:

QueryIterator, java.io.Serializable

public class TreeIterator

extends ListIterator

Query iterator using T-Tree

See Also:

Serialized Form

Constructor Summary

TreeIterator(java.lang.Class cls, java.lang.String keyName)
Constructor of tree iterator

TreeIterator(java.lang.reflect.Field key)
Constructor of tree iterator

Method Summary

void	add(L2Elem obj) Add new object
boolean	getByKeyRange(java.lang.String key, java.lang.Object minValue, java.lang.Object maxValue, boolean inclusive, Query result) Try to use index to select objects belonginh to the specified range
void	remove(L2Elem obj) Remove object from the tree
boolean	useNormalizedKeys() Check if iterator supporting direct access by key stores key values in normalized form (all integer types as Long, all real types as Double, other types as it is).

Methods inherited from class org.garret.jsql.ListIterator

concurrentIterator, getByPrimaryKey, getFirst, getNext, isThreadSafe

Methods inherited from class org.garret.jsql.L2Elem

getNext, getPrevious, isEmpty, link, unlink

Methods inherited from class java.lang.Object

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

Constructor Detail

TreeIterator

public TreeIterator(java.lang.reflect.Field key)

Constructor of tree iterator

Parameters:

key - key field

TreeIterator

public TreeIterator(java.lang.Class cls,
                    java.lang.String keyName)
             throws java.lang.NoSuchFieldException

Constructor of tree iterator

Parameters:

cls - class of the members

keyName - name of key field

Method Detail

getByKeyRange

public boolean getByKeyRange(java.lang.String key,
                             java.lang.Object minValue,
                             java.lang.Object maxValue,
                             boolean inclusive,
                             Query result)

Description copied from interface: QueryIterator

Try to use index to select objects belonginh to the specified range

Specified by:

getByKeyRange in interface QueryIterator

Overrides:

getByKeyRange in class ListIterator

useNormalizedKeys

public boolean useNormalizedKeys()

Description copied from interface: QueryIterator

Check if iterator supporting direct access by key stores key values in normalized form (all integer types as Long, all real types as Double, other types as it is). Normalization of key value should be performed using Query.normilizeKeyValue method.
If this method returns false then JSQL will try to convert search literals to the type of the indexed field. But it is possible only if type of the field is known at query compilation time. Otherwise in case of using dynamic binding such covertsion should be performed by iterator itself using Query.castLiteral method.

Specified by:

useNormalizedKeys in interface QueryIterator

Overrides:

useNormalizedKeys in class ListIterator

add

public void add(L2Elem obj)

Add new object

Overrides:

add in class ListIterator

Parameters:

obj - new object

remove

public void remove(L2Elem obj)

Remove object from the tree

Parameters:

obj - removed object