org.jpox.store.expression
Class ArrayExpression

java.lang.Object
  org.jpox.store.expression.ScalarExpression
      org.jpox.store.expression.ArrayExpression

Direct Known Subclasses:

ArrayLiteral

public class ArrayExpression
extends ScalarExpression

Representation of array expression. Either backed by ScalarExpressions, or by an array field

Version:

$Revision: 1.3 $

Nested Class Summary

Nested classes/interfaces inherited from class org.jpox.store.expression.ScalarExpression

ScalarExpression.DyadicOperator, ScalarExpression.ExpressionList, ScalarExpression.FieldExpression, ScalarExpression.IllegalArgumentTypeException, ScalarExpression.IllegalOperationException, ScalarExpression.MethodInvocationException, ScalarExpression.MonadicOperator, ScalarExpression.Operator

Field Summary

Fields inherited from class org.jpox.store.expression.ScalarExpression

aliasIdentifier, expressionList, FILTER, LOCALISER, lowestOperator, mapping, OP_ADD, OP_AND, OP_BETWEEN, OP_COM, OP_CONCAT, OP_DIV, OP_EQ, OP_GT, OP_GTEQ, OP_IN, OP_IS, OP_ISNOT, OP_LIKE, OP_LT, OP_LTEQ, OP_MOD, OP_MUL, OP_NEG, OP_NOT, OP_NOTEQ, OP_OR, OP_SUB, PROJECTION, qs, st, te

Constructor Summary

protected	ArrayExpression(QueryExpression qs) Constructor
	ArrayExpression(QueryExpression qs, JavaTypeMapping ownerMapping, LogicSetExpression te, ArrayStore arrayStore, java.lang.String fieldName) Constructor.
	ArrayExpression(QueryExpression qs, ScalarExpression[] expr) Constructor

Method Summary

ScalarExpression	accessField(java.lang.String subfieldName, boolean innerJoin) Access a field in an array
BooleanExpression	containsMethod(ScalarExpression expr) Executed when the contains() method is found in a query filter.
NumericExpression	lengthMethod() Executed when the length() method is found in a query filter.
NumericExpression	sizeMethod() Executed when the size() method is found in a query filter.

Methods inherited from class org.jpox.store.expression.ScalarExpression

add, and, as, callMethod, cast, com, div, encloseWithInParentheses, eor, eq, equals, getAlias, getExpressionList, getLogicSetExpression, getMapping, getNonAliasExpression, getQueryExpression, gt, gteq, in, instanceOf, ior, lt, lteq, mod, mul, neg, not, noteq, sub, toStatementText, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayExpression

protected ArrayExpression(QueryExpression qs)

Constructor

Parameters:

qs - The query statement

ArrayExpression

public ArrayExpression(QueryExpression qs,
                       ScalarExpression[] expr)

Constructor

Parameters:

qs - The query statement

expr - the array of expressions

ArrayExpression

public ArrayExpression(QueryExpression qs,
                       JavaTypeMapping ownerMapping,
                       LogicSetExpression te,
                       ArrayStore arrayStore,
                       java.lang.String fieldName)

Constructor.

Parameters:

qs - The Query Statement

ownerMapping - The mapping to the owner of this collection

te - The Table Expression

arrayStore - the backing store.

fieldName - Name of the field for the collection.

Method Detail

sizeMethod

public NumericExpression sizeMethod()

Executed when the size() method is found in a query filter.

Returns:

The NumericExpression resulting from the size() method.

lengthMethod

public NumericExpression lengthMethod()

Executed when the length() method is found in a query filter.

Returns:

The NumericExpression resulting from the size() method.

accessField

public ScalarExpression accessField(java.lang.String subfieldName,
                                    boolean innerJoin)

Access a field in an array

Overrides:

accessField in class ScalarExpression

Parameters:

subfieldName - the field to be accessed in this object

innerJoin - whether to inner join

Returns:

The field expression representing the required field of this object

containsMethod

public BooleanExpression containsMethod(ScalarExpression expr)

Executed when the contains() method is found in a query filter.

Parameters:

expr - The ScalarExpression passed as a parameter to contains().

Returns:

The BooleanExpression resulting from the contains() method.