org.melati.poem

Class CachedExists

java.lang.Object

org.melati.poem.CachedQuery<Integer>

org.melati.poem.CachedCount

org.melati.poem.CachedExists

public class CachedExists
extends CachedCount

A cached instance of an SQL count > 0 query.

Constructor Summary

Constructors

Constructor and Description
CachedExists(Table<?> table, String whereClause)
CachedExists(Table<?> table, String whereClause, Table<?>[] otherTables) Constructor.

Method Summary

Modifier and Type	Method and Description
boolean	exists()

Methods inherited from class org.melati.poem.CachedCount

count

Methods inherited from class org.melati.poem.CachedQuery

getTable, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

CachedExists

public CachedExists(Table<?> table,
                    String whereClause,
                    Table<?>[] otherTables)

Constructor.

Parameters:

table - the Table we are dealing with

whereClause - SQL snippet

otherTables - Array of other tables referred to in whereClause, if any

CachedExists

public CachedExists(Table<?> table,
                    String whereClause)

Parameters:

table - the Table we are dealing with

whereClause - SQL snippet

Method Detail

exists

public boolean exists()

Returns:

whether any record match the criteria or not