planetj.dataengine.cache
Class KeyedRowCache

java.lang.Object
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  +--planetj.dataengine.cache.RowKeyTableCache
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        +--planetj.dataengine.cache.KeyedRowCache

public class KeyedRowCache

extends RowKeyTableCache

A cache which holds rows based on their keys. Rows without keys cannot be added to this cache. If two rows have from different tables have the same key, this cache will not confuse the two rows.

Constructor Summary

KeyedRowCache()
KeyedRowCache constructor

Method Summary

boolean	add(Row row) Adds a Row to the cache, but only if it has a key.
Row	get(RowKey key) Gets a keyed row out of the cache
boolean	isContains(Row row) Tests if a row is present in the cache

Methods inherited from class planetj.dataengine.cache.RowKeyTableCache

add, get, getAll, getAll

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyedRowCache

public KeyedRowCache()

KeyedRowCache constructor

Method Detail

add

public boolean add(Row row)
            throws CMException

Adds a Row to the cache, but only if it has a key.

Returns:

If the Row was added or not

CMException

get

public Row get(RowKey key)

Gets a keyed row out of the cache

Returns:

The Row in the cache which corresponds to the key, or null if no such row exists in the cache

isContains

public boolean isContains(Row row)
                   throws CMException

Tests if a row is present in the cache

CMException