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

java.lang.Object
  com.triactive.jdo.store.sql.expr.AbstractSqlExpression
      com.triactive.jdo.store.sql.expr.MapExpression
          com.triactive.jdo.store.sql.expr.MapFieldExpression

All Implemented Interfaces:

SqlExpression, StatementTextGenerator

public class MapFieldExpression

extends MapExpression

A map expression that represents some map field in a query candidate class, or a map field in an object linked from the candidate class by navigation.

When navigated through using containsKey(expr) or containsValue(expr), the keys or values of the map are added as a correlated subquery.

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

MapFieldExpression(QueryStatement.QueryColumn ownerQsc, MapStore mapStore, java.lang.String fieldName)

Method Summary

SqlExpression	containsKeyMethod(SqlExpression expr)
SqlExpression	containsValueMethod(SqlExpression expr)
SqlExpression	isEmptyMethod()
SetExpression	keySetMethod()
SqlExpression	sizeMethod()
StatementText	toStatementText() Returns the SQL statement text which this object generates.
SetExpression	valuesMethod()

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

MapFieldExpression

public MapFieldExpression(QueryStatement.QueryColumn ownerQsc,
                          MapStore mapStore,
                          java.lang.String fieldName)

Method Detail

keySetMethod

public SetExpression keySetMethod()

valuesMethod

public SetExpression valuesMethod()

containsKeyMethod

public SqlExpression containsKeyMethod(SqlExpression expr)

containsValueMethod

public SqlExpression containsValueMethod(SqlExpression expr)

isEmptyMethod

public SqlExpression isEmptyMethod()

sizeMethod

public SqlExpression sizeMethod()

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 MapExpression