org.apache.openjpa.jdbc.kernel.exps
Class InExpression

java.lang.Object
  org.apache.openjpa.jdbc.kernel.exps.InExpression

All Implemented Interfaces:

Serializable, Exp, Expression

Direct Known Subclasses:

InKeyExpression, InValueExpression

 class InExpression
extends Object
implements Exp

Tests whether a value is IN a collection.

Author:

Abe White

Constructor Summary

InExpression(Val val, Const constant)
Constructor.

Method Summary

void	acceptVisit(ExpressionVisitor visitor) Accept a visit from a tree visitor.
void	appendTo(Select sel, ExpContext ctx, ExpState state, SQLBuffer buf) Append the SQL for this expression to the given buffer.
protected Collection	getCollection(ExpContext ctx, ExpState state) Return the collection to test for containment with.
Const	getConstant() Constant collection.
Val	getValue() Contained value.
ExpState	initialize(Select sel, ExpContext ctx, Map contains) Initialize the expression.
void	selectColumns(Select sel, ExpContext ctx, ExpState state, boolean pks) Select just the columns for this expression.

Methods inherited from class java.lang.Object

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

Constructor Detail

InExpression

public InExpression(Val val,
                    Const constant)

Constructor. Supply the value to test and the constant to obtain the parameters from.

Method Detail

getConstant

public Const getConstant()

Constant collection.

getValue

public Val getValue()

Contained value.

initialize

public ExpState initialize(Select sel,
                           ExpContext ctx,
                           Map contains)

Description copied from interface: Exp

Initialize the expression. This method should recursively initialize any sub-expressions or values.

Specified by:

initialize in interface Exp

contains - map of relation paths to the number of times the paths appear in a contains() expression; used to ensure paths used for contains() within the same AND expression used different aliases

appendTo

public void appendTo(Select sel,
                     ExpContext ctx,
                     ExpState state,
                     SQLBuffer buf)

Description copied from interface: Exp

Append the SQL for this expression to the given buffer. The SQL should optionally include any joins this expression needs.

Specified by:

appendTo in interface Exp

selectColumns

public void selectColumns(Select sel,
                          ExpContext ctx,
                          ExpState state,
                          boolean pks)

Description copied from interface: Exp

Select just the columns for this expression.

Specified by:

selectColumns in interface Exp

getCollection

protected Collection getCollection(ExpContext ctx,
                                   ExpState state)

Return the collection to test for containment with.

acceptVisit

public void acceptVisit(ExpressionVisitor visitor)

Description copied from interface: Expression

Accept a visit from a tree visitor.

Specified by:

acceptVisit in interface Expression