oracle.jbo.server.rules
Class JboCompareValidator

java.lang.Object
  oracle.jbo.rules.AbstractValidator
      oracle.jbo.server.rules.JboBaseValidator
          oracle.jbo.server.rules.JboCompareValidator

All Implemented Interfaces:

java.util.EventListener, JbiValidator, VetoableChangeListener

Direct Known Subclasses:

JboSQLCompareValidator, JboVOCompareValidator

public class JboCompareValidator

extends JboBaseValidator

implements JbiValidator

A validator that tests literal values by comparing them to a pre-defined value, using a pre-defined relation.

The value to be validated is designated as the left-hand operand of a relation operation. The validator provides the right-hand operand and the relation operator.

Since:

Jdeveloper 3.0

Field Summary

static int	EQUALTO
static int	GREATERTHAN
static int	GREATERTHANEQUALTO
static int	LESSTHAN
static int	LESSTHANEQUALTO
protected int	mOperType
protected java.lang.Object	mRValue

Fields inherited from class oracle.jbo.server.rules.JboBaseValidator

mLValue, mValidatingAttr

Fields inherited from class oracle.jbo.rules.AbstractValidator

mDescription, mErrorMessageClass, mMsgId, mValidatingAttrName

Constructor Summary

	JboCompareValidator() Creates an uninitialized compare validator.
protected	JboCompareValidator(boolean inverse, int operType) Creates an partially-initialized compare validator.
	JboCompareValidator(boolean inverse, int operType, java.lang.Object rValue) Creates an initialized compare validator.

Method Summary

static int	convertOperType(java.lang.String type) Interprets a string as one of the comparison operator constants defined in this class.
java.lang.String	getOperatorTypeString() Converts this validator's comparison operator to its symbolic form.
java.lang.Object	getRhsValue() Gets the right-side operand of this validator's expression.
int	getType() Gets this validator's comparison operator.
protected void	initialize()
protected void	setNewValue(java.lang.Object newValue) after setting the new value, prepare the comparator to be of same type if it is not already so.
void	setRhsValue(java.lang.Object rhsValue) Sets the right-side operand of this validator's expression.
void	setType(int type) Sets this validator's comparison operator.
java.lang.String	toString() Internal: For debugging purposes only.
boolean	validateValue(java.lang.Object value) Validate an object by comparing it with a pre-defined value, using a pre-defined relation.

Methods inherited from class oracle.jbo.server.rules.JboBaseValidator

raiseException, setValidatingAttribute, setValidatingAttribute, vetoableChange

Methods inherited from class oracle.jbo.rules.AbstractValidator

convertToJava, getDescription, getErrorMessageClass, getErrorMsgId, getInverse, getValidatingAttributeName, setDescription, setErrorMessageClass, setErrorMsgId, setInverse, setValidatingAttributeName

Methods inherited from class java.lang.Object

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

Methods inherited from interface oracle.jbo.server.rules.JbiValidator

getDescription, setDescription

Methods inherited from interface oracle.jbo.server.util.VetoableChangeListener

vetoableChange

Field Detail

EQUALTO

public static final int EQUALTO

See Also:

Constant Field Values

LESSTHAN

public static final int LESSTHAN

See Also:

Constant Field Values

GREATERTHAN

public static final int GREATERTHAN

See Also:

Constant Field Values

LESSTHANEQUALTO

public static final int LESSTHANEQUALTO

See Also:

Constant Field Values

GREATERTHANEQUALTO

public static final int GREATERTHANEQUALTO

See Also:

Constant Field Values

mOperType

protected int mOperType

mRValue

protected java.lang.Object mRValue

Constructor Detail

JboCompareValidator

public JboCompareValidator()

Creates an uninitialized compare validator.

The methods setType() and setRhsValue() must be invoked before validation can be performed.

JboCompareValidator

protected JboCompareValidator(boolean inverse,
                              int operType)

Creates an partially-initialized compare validator.

The method setRhsValue() must be invoked before validation can be performed.

Parameters:

inverse - if true the logic of this validator's comparison relation is inverted.

operType - this validator's comparison operator; one of the comparison operator constants defined in this class.

JboCompareValidator

public JboCompareValidator(boolean inverse,
                           int operType,
                           java.lang.Object rValue)

Creates an initialized compare validator.

Parameters:

inverse - if true the logic of this validator's comparison relation is inverted.

operType - this validator's comparison operator; one of the comparison operator constants defined in this class.

rValue - this validator's right-hand operand, a reference object containing a literal value.

Method Detail

initialize

protected void initialize()

Overrides:

initialize in class JboBaseValidator

setNewValue

protected void setNewValue(java.lang.Object newValue)
                    throws java.lang.Exception

after setting the new value, prepare the comparator to be of same type if it is not already so.

Overrides:

setNewValue in class JboBaseValidator

Parameters:

newValue - either the attribute's value or a value to use to compare in the validator.

Throws:

java.lang.Exception

validateValue

public boolean validateValue(java.lang.Object value)

Validate an object by comparing it with a pre-defined value, using a pre-defined relation.

The value parameter is the left-hand operand of this validator's comparison relation. The operator is set by setType() and the right-hand operator is set by setRhsValue().

This method is called by JboBaseValidator#vetoableChange().

Specified by:

validateValue in interface JbiValidator

Specified by:

validateValue in class JboBaseValidator

Parameters:

value - the object to be validated.

Returns:

true if the relation holds, or false if the relation does not hold or if the operator or an operand is invalid or uninitialized.

setType

public void setType(int type)

Sets this validator's comparison operator.

Parameters:

type - one of the comparison operator constants defined in this class.

getType

public int getType()

Gets this validator's comparison operator.

setRhsValue

public void setRhsValue(java.lang.Object rhsValue)

Sets the right-side operand of this validator's expression.

Parameters:

rhsValue - a reference object containing a literal value.

getRhsValue

public java.lang.Object getRhsValue()

Gets the right-side operand of this validator's expression.

toString

public java.lang.String toString()

Internal: For debugging purposes only.

convertOperType

public static int convertOperType(java.lang.String type)

Interprets a string as one of the comparison operator constants defined in this class.

Parameters:

type - a string, the textual name of a comparison operator.

Returns:

a comparison operator constant. An unrecognizable string defaults to EQUALTO.

getOperatorTypeString

public java.lang.String getOperatorTypeString()

Converts this validator's comparison operator to its symbolic form.

Returns:

a comparison symbol. If the comparison operator is uninitialized or invalid the null string is returned.