org.jpox.store.expression
Class NumericExpression

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

Direct Known Subclasses:

AggregateExpression, ByteExpression, ByteLiteral, FloatingPointLiteral, IntegerLiteral

public class NumericExpression
extends ScalarExpression

Representation of a Numeric expression in a Query.

Version:

$Revision: 1.20 $

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	NumericExpression(QueryExpression qs) Constructor
	NumericExpression(QueryExpression qs, JavaTypeMapping mapping, LogicSetExpression te)
	NumericExpression(ScalarExpression.MonadicOperator op, ScalarExpression operand) Perform a function op on operand
	NumericExpression(ScalarExpression operand1, ScalarExpression.DyadicOperator op, ScalarExpression operand2) Performs a function on two arguments.
	NumericExpression(java.lang.String functionName, java.util.List args) Generates statement as e.g.
	NumericExpression(java.lang.String functionName, java.util.List args, java.util.List types) Generates statement as e.g.

Method Summary

ScalarExpression	add(ScalarExpression expr) Additive Operator.
ScalarExpression	com() Bitwise Complement Operator
ScalarExpression	div(ScalarExpression expr) Division Operator.
BooleanExpression	eq(ScalarExpression expr) Equality operator (equals to)
BooleanExpression	gt(ScalarExpression expr) Relational operator (greater than)
BooleanExpression	gteq(ScalarExpression expr) Relational operator (greater than or equals)
BooleanExpression	in(ScalarExpression expr) In expression.
BooleanExpression	lt(ScalarExpression expr) Relational operator (lower than)
BooleanExpression	lteq(ScalarExpression expr) Relational operator (lower than or equals)
ScalarExpression	mod(ScalarExpression expr) Method to return a modulus expression.
ScalarExpression	mul(ScalarExpression expr) Multiplication Operator
ScalarExpression	neg() Unary Minus Operator
BooleanExpression	noteq(ScalarExpression expr) Equality operator (not equals to)
ScalarExpression	sub(ScalarExpression expr) Additive Operator.

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

accessField, and, as, callMethod, cast, encloseWithInParentheses, eor, equals, getAlias, getExpressionList, getLogicSetExpression, getMapping, getNonAliasExpression, getQueryExpression, instanceOf, ior, not, toStatementText, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

NumericExpression

protected NumericExpression(QueryExpression qs)

Constructor

Parameters:

qs - the QueryExpression

NumericExpression

public NumericExpression(QueryExpression qs,
                         JavaTypeMapping mapping,
                         LogicSetExpression te)

Parameters:

qs - the QueryExpression

mapping - the mapping associated to this expression

te - the TableExpression where this expression refers to

NumericExpression

public NumericExpression(java.lang.String functionName,
                         java.util.List args)

Generates statement as e.g. FUNCTION_NAME(arg[,argN]). The function returns a numeric value

Parameters:

functionName -

args - ScalarExpression list

NumericExpression

public NumericExpression(java.lang.String functionName,
                         java.util.List args,
                         java.util.List types)

Generates statement as e.g. FUNCTION_NAME(arg AS type[,argN as typeN])

Parameters:

functionName - Name of function

args - ScalarExpression list

types - String or ScalarExpression list

NumericExpression

public NumericExpression(ScalarExpression.MonadicOperator op,
                         ScalarExpression operand)

Perform a function op on operand

Parameters:

op - operator

operand - operand

NumericExpression

public NumericExpression(ScalarExpression operand1,
                         ScalarExpression.DyadicOperator op,
                         ScalarExpression operand2)

Performs a function on two arguments. op(operand1,operand2) operand1 op operand2

Parameters:

operand1 - the first expression

op - the operator between operands

operand2 - the second expression

Method Detail

eq

public BooleanExpression eq(ScalarExpression expr)

Description copied from class: ScalarExpression

Equality operator (equals to)

Overrides:

eq in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

The type of an equality expression is a boolean

noteq

public BooleanExpression noteq(ScalarExpression expr)

Description copied from class: ScalarExpression

Equality operator (not equals to)

Overrides:

noteq in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

The type of an equality expression is a boolean

lt

public BooleanExpression lt(ScalarExpression expr)

Description copied from class: ScalarExpression

Relational operator (lower than)

Overrides:

lt in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is less than the value of the right-hand operand, and otherwise is false.

lteq

public BooleanExpression lteq(ScalarExpression expr)

Description copied from class: ScalarExpression

Relational operator (lower than or equals)

Overrides:

lteq in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is less than or equal to the value of the right-hand operand, and otherwise is false.

gt

public BooleanExpression gt(ScalarExpression expr)

Description copied from class: ScalarExpression

Relational operator (greater than)

Overrides:

gt in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is greater than the value of the right-hand operand, and otherwise is false.

gteq

public BooleanExpression gteq(ScalarExpression expr)

Description copied from class: ScalarExpression

Relational operator (greater than or equals)

Overrides:

gteq in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

true if the value of the left-hand operand is greater than or equal the value of the right-hand operand, and otherwise is false.

in

public BooleanExpression in(ScalarExpression expr)

Description copied from class: ScalarExpression

In expression. Return true if this is contained by expr

Overrides:

in in class ScalarExpression

Parameters:

expr - the right-hand expression

Returns:

true if the left-hand expression is contained by the right-hand expression. Otherwise the result is false.

add

public ScalarExpression add(ScalarExpression expr)

Description copied from class: ScalarExpression

Additive Operator. The binary + operator performs addition when applied to two operands of numeric type, producing the sum of the operands. If the type of either operand of a + operator is String, then the operation is string concatenation.

Overrides:

add in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

If one of the operands is String, the returned value is the string concatenation; The sum of two operands of numeric type. The left-hand operand is the minuend and the right-hand operand is the subtrahend;

sub

public ScalarExpression sub(ScalarExpression expr)

Description copied from class: ScalarExpression

Additive Operator. The binary - operator subtracts right-hand operand from left-hand operand.

Overrides:

sub in class ScalarExpression

Parameters:

expr - the right-hand operand

Returns:

The binary - operator performs subtraction when applied to two operands of numeric type producing the difference of its operands; the left-hand operand is the minuend and the right-hand operand is the subtrahend.

mul

public ScalarExpression mul(ScalarExpression expr)

Description copied from class: ScalarExpression

Multiplication Operator

Overrides:

mul in class ScalarExpression

Parameters:

expr - the right-hand operator

Returns:

The binary * operator performs multiplication, producing the product of its operands.

div

public ScalarExpression div(ScalarExpression expr)

Description copied from class: ScalarExpression

Division Operator. The left-hand operand is the dividend and the right-hand operand is the divisor.

Overrides:

div in class ScalarExpression

Parameters:

expr - the right-hand operator

Returns:

The binary / operator performs division, producing the quotient of its operands

mod

public ScalarExpression mod(ScalarExpression expr)

Method to return a modulus expression.

Overrides:

mod in class ScalarExpression

Parameters:

expr - The expression to modulus against

Returns:

The modulus expression

neg

public ScalarExpression neg()

Description copied from class: ScalarExpression

Unary Minus Operator

Overrides:

neg in class ScalarExpression

Returns:

the type of the unary minus expression is the promoted type of the operand.

com

public ScalarExpression com()

Description copied from class: ScalarExpression

Bitwise Complement Operator

Overrides:

com in class ScalarExpression

Returns:

the type of the unary bitwise complement expression is the promoted type of the operand.