Module org.datanucleus.store.rdbms

Package org.datanucleus.store.rdbms.sql.expression

Class SingleCollectionExpression

java.lang.Object

org.datanucleus.store.rdbms.sql.expression.SQLExpression

org.datanucleus.store.rdbms.sql.expression.DelegatedExpression

org.datanucleus.store.rdbms.sql.expression.SingleCollectionExpression

Direct Known Subclasses:

OptionalExpression, SingleCollectionLiteral

public class SingleCollectionExpression
extends DelegatedExpression

Cover-all expression to represent "single collection" mapped types. Note that we should split this up if we ever want to have methods on particular types. For example we could have OptionalExpression and provide methods "isPresent" and "get".

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

SQLExpression.ColumnExpressionList

Field Summary

Fields

Modifier and Type	Field	Description
protected SQLExpression[]	wrappedExpressions

Fields inherited from class org.datanucleus.store.rdbms.sql.expression.DelegatedExpression

delegate

Fields inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

lowestOperator, mapping, parameterName, st, stmt, subExprs, table

Constructor Summary

Constructors

Constructor	Description
SingleCollectionExpression(SQLStatement stmt, SQLTable table, JavaTypeMapping mapping)

Method Summary

Modifier and Type	Method	Description
SQLExpression	invoke(String methodName, List<SQLExpression> args)	Invocation of a method on this expression.

Methods inherited from class org.datanucleus.store.rdbms.sql.expression.DelegatedExpression

add, div, eq, ge, getDelegate, getNumberOfSubExpressions, getSubExpression, gt, isParameter, le, lt, mod, mul, ne, sub, toSQLText

Methods inherited from class org.datanucleus.store.rdbms.sql.expression.SQLExpression

and, bitAnd, bitOr, cast, com, distinct, encloseInParentheses, eor, getJavaTypeMapping, getLowestOperator, getParameterName, getSQLStatement, getSQLTable, in, ior, is, neg, not, setJavaTypeMapping, unDistinct

Methods inherited from class java.lang.Object

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

Field Detail

wrappedExpressions

protected SQLExpression[] wrappedExpressions

Constructor Detail

SingleCollectionExpression

public SingleCollectionExpression(SQLStatement stmt,
                                  SQLTable table,
                                  JavaTypeMapping mapping)

Method Detail

invoke

public SQLExpression invoke(String methodName,
                            List<SQLExpression> args)

Description copied from class: SQLExpression

Invocation of a method on this expression.

Overrides:

invoke in class DelegatedExpression

Parameters:

methodName - name of the method to invoke

args - Args to this method (if any)

Returns:

the converted value