com.triactive.jdo.store.sql.expr
Class CandidateSetExpression

java.lang.Object
  com.triactive.jdo.store.sql.expr.AbstractSqlExpression
      com.triactive.jdo.store.sql.expr.SetExpression
          com.triactive.jdo.store.sql.expr.CandidateSetExpression

All Implemented Interfaces:

SqlExpression, StatementTextGenerator

public class CandidateSetExpression

extends SetExpression

A set expression that represents some collection in a query candidate class, or a collection obtained from an object linked from the candidate class by navigation. When navigated through using contains(expr), the elements of the set are relationally joined onto the query statement.

This is most often used to represent a simple Set field in a persistent object, but can also represent the keys or values in a Map field.

Author:

Mike Martin

Nested Class Summary

Nested classes inherited from class com.triactive.jdo.store.sql.expr.AbstractSqlExpression

AbstractSqlExpression.Body, AbstractSqlExpression.CompoundExpression, AbstractSqlExpression.SimpleColumnReference, AbstractSqlExpression.SubqueryExpression

Field Summary

Fields inherited from class com.triactive.jdo.store.sql.expr.AbstractSqlExpression

body, qs

Constructor Summary

CandidateSetExpression(QueryStatement.QueryColumn ownerQsc, CollectionStore collStore, java.lang.String fieldName)

Method Summary

SqlExpression	containsMethod(SqlExpression expr)
SqlExpression	isEmptyMethod()
SqlExpression	sizeMethod()
StatementText	toStatementText() Returns the SQL statement text which this object generates.

Methods inherited from class com.triactive.jdo.store.sql.expr.AbstractSqlExpression

accessField, add, and, callMethod, cast, com, div, eor, eq, getColumnMapping, getJavaType, getMapping, getQueryStatement, getReferencedColumns, gt, gteq, innermostQuery, innermostQuery, ior, lt, lteq, mod, mul, neg, newBody, newBody, newBody, newBody, newBody, newBody, newResultExpression, newSubqueryBody, not, noteq, select, setMapping, sub, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

CandidateSetExpression

public CandidateSetExpression(QueryStatement.QueryColumn ownerQsc,
                              CollectionStore collStore,
                              java.lang.String fieldName)

Method Detail

containsMethod

public SqlExpression containsMethod(SqlExpression expr)

Overrides:

containsMethod in class SetExpression

isEmptyMethod

public SqlExpression isEmptyMethod()

Specified by:

isEmptyMethod in class SetExpression

sizeMethod

public SqlExpression sizeMethod()

Specified by:

sizeMethod in class SetExpression

toStatementText

public StatementText toStatementText()

Description copied from interface: StatementTextGenerator

Returns the SQL statement text which this object generates.

Specified by:

toStatementText in interface StatementTextGenerator

Overrides:

toStatementText in class AbstractSqlExpression