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

Class ObjectLiteral

java.lang.Object

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

org.datanucleus.store.rdbms.sql.expression.ObjectExpression

org.datanucleus.store.rdbms.sql.expression.ObjectLiteral

All Implemented Interfaces:

SQLLiteral

public class ObjectLiteral
extends ObjectExpression
implements SQLLiteral

Representation of an Object literal in a query.

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
private Object	value

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

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

Constructor Summary

Constructors

Constructor	Description
ObjectLiteral(SQLStatement stmt, JavaTypeMapping mapping, Object value, String parameterName)	Constructor for an Object literal with a value.

Method Summary

Modifier and Type	Method	Description
private void	addSubexpressionsForValue(Object value, JavaTypeMapping mapping)	Method to add subExprs for the supplied mapping, consistent with the supplied value.
BooleanExpression	eq(SQLExpression expr)	Method called when the query contains "object == value".
Object	getValue()	Accessor to the literal value
BooleanExpression	ne(SQLExpression expr)	Method called when the query contains "object NOTEQUALS value".
void	setNotParameter()	Method to set this literal as not being a parameter.
protected void	setStatement()
String	toString()

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

addSubexpressionsToRelatedExpression, cast, ge, gt, in, invoke, is, le, lt, processComparisonOfImplementationWithReference, useFirstColumnOnly

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

add, and, bitAnd, bitOr, com, distinct, div, encloseInParentheses, eor, getJavaTypeMapping, getLowestOperator, getNumberOfSubExpressions, getParameterName, getSQLStatement, getSQLTable, getSubExpression, ior, isParameter, mod, mul, neg, not, setJavaTypeMapping, sub, toSQLText, unDistinct

Methods inherited from class java.lang.Object

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

Field Details

value

private Object value

Constructor Details

ObjectLiteral

public ObjectLiteral(SQLStatement stmt,
 JavaTypeMapping mapping,
 Object value,
 String parameterName)

Constructor for an Object literal with a value.

Parameters:

stmt - the SQL statement

mapping - the mapping

value - the Object value

parameterName - Name of the parameter that this represents if any (as JDBC "?")

Method Details

addSubexpressionsForValue

private void addSubexpressionsForValue(Object value,
 JavaTypeMapping mapping)

Method to add subExprs for the supplied mapping, consistent with the supplied value. The value can be a persistent object, or an identity (datastore/application).

Parameters:

value - The value

mapping - The mapping

getValue

public Object getValue()

Description copied from interface: SQLLiteral

Accessor to the literal value

Specified by:

getValue in interface SQLLiteral

Returns:

the value of the literal

eq

public BooleanExpression eq(SQLExpression expr)

Method called when the query contains "object == value".

Overrides:

eq in class ObjectExpression

Parameters:

expr - The expression

Returns:

The resultant expression for this query relation

ne

public BooleanExpression ne(SQLExpression expr)

Method called when the query contains "object NOTEQUALS value".

Overrides:

ne in class ObjectExpression

Parameters:

expr - The expression

Returns:

The resultant expression for this query relation

toString

public String toString()

Overrides:

toString in class Object

setNotParameter

public void setNotParameter()

Description copied from interface: SQLLiteral

Method to set this literal as not being a parameter. If the literal if not currently a parameter then does nothing. Updates any underlying SQL to have the value.

Specified by:

setNotParameter in interface SQLLiteral

setStatement

protected void setStatement()