org.melati.poem
Class CachedSelection

java.lang.Object
  org.melati.poem.CachedQuery
      org.melati.poem.CachedSelection

public class CachedSelection
extends CachedQuery

A cached instance of an SQL select query.

Field Summary

Fields inherited from class org.melati.poem.CachedQuery

rows, statements, table

Constructor Summary

CachedSelection(Table table, String whereClause, String orderByClause)
Constructor for a single Table query.

CachedSelection(Table table, String whereClause, String orderByClause, Table[] otherTables)
Constructor.

Method Summary

int	count()
Persistent	firstObject()
Persistent	nth(int n)
Enumeration	objects()
Enumeration<Integer>	troids()

Methods inherited from class org.melati.poem.CachedQuery

compute, extract, getTable, setQuery, statements, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

CachedSelection

public CachedSelection(Table table,
                       String whereClause,
                       String orderByClause,
                       Table[] otherTables)

Constructor.

Parameters:

table - the primary Table we are selecting rows from

whereClause - SQL snippet

orderByClause - SQL snippet

otherTables - an Array of Tables which are also referenced in query

CachedSelection

public CachedSelection(Table table,
                       String whereClause,
                       String orderByClause)

Constructor for a single Table query.

Parameters:

table - the primary Table we are selecting rows from

whereClause - SQL snippet

orderByClause - SQL snippet

Method Detail

troids

public Enumeration<Integer> troids()

Returns:

an Enumeration of Table Row Object Ids

objects

public Enumeration objects()

Returns:

an Enumeration of Table Row ReferencePoemType objects

firstObject

public Persistent firstObject()

Returns:

the first, often only, result

nth

public Persistent nth(int n)

Parameters:

n - index into ResultSet

Returns:

the row corresponding to the index

count

public int count()

Returns:

the number of results