org.qtitools.qti.node.expression.operator
Class AnyN

java.lang.Object
  org.qtitools.qti.node.AbstractNode
      org.qtitools.qti.node.AbstractObject
          org.qtitools.qti.node.expression.AbstractExpression
              org.qtitools.qti.node.expression.operator.AnyN

All Implemented Interfaces:

java.io.Serializable, Expression, ExpressionParent, XmlNode, XmlObject, Validatable

public class AnyN
extends AbstractExpression

The anyN operator takes one or more sub-expressions each with A base-type of boolean and single cardinality. The result is A single boolean which is true if at least min of the sub-expressions are true and at most max of the sub-expressions are true. If more than n - min sub-expressions are false (where n is the total number of sub-expressions) or more than max sub-expressions are true then the result is false. If one or more sub-expressions are NULL then it is possible that neither of these conditions is satisfied, in which case the operator results in NULL. For example, if min is 3 and max is 4 and the sub-expressions have values {true,true,false,NULL} then the operator results in NULL whereas {true,false,false,NULL} results in false and {true,true,true,NULL} results in true. The result NULL indicates that the correct value for the operator cannot be determined.

Author:

Jiri Kajaba

See Also:

Cardinality, BaseType, Serialized Form

Field Summary

static java.lang.String	ATTR_MAXIMUM_NAME Name of max attribute in xml schema.
static java.lang.String	ATTR_MINIMUM_NAME Name of min attribute in xml schema.
static java.lang.String	CLASS_TAG Name of this class in xml schema.

Fields inherited from class org.qtitools.qti.node.expression.AbstractExpression

logger

Fields inherited from interface org.qtitools.qti.node.expression.Expression

DISPLAY_NAME

Fields inherited from interface org.qtitools.qti.node.XmlNode

INDENT, NEW_LINE, SIMPLE_NAME_INNER_SEPARATOR, SIMPLE_NAMES_SEPARATOR

Constructor Summary

AnyN(ExpressionParent parent)
Constructs expression.

Method Summary

protected Value	evaluateSelf(int depth) Evaluates this expression.
java.lang.String	getClassTag() Gets QTI class name of this node.
java.lang.Integer	getMaximum() Gets value of max attribute.
java.lang.Integer	getMinimum() Gets value of min attribute.
void	setMaximum(java.lang.Integer maximum) Sets new value of max attribute.
void	setMinimum(java.lang.Integer minimum) Sets new value of min attribute.
protected ValidationResult	validateAttributes() Validates attributes of this node.

Methods inherited from class org.qtitools.qti.node.expression.AbstractExpression

evaluate, getBaseType, getCardinality, getChildren, getFirstChild, getParent, getParentRequiredBaseTypes, getParentRequiredCardinalities, getProducedBaseTypes, getProducedCardinalities, getProducedNumericalBaseTypes, getRequiredBaseTypes, getRequiredCardinalities, getRequiredSameBaseTypes, getRequiredSameCardinalities, getSecondChild, getType, getValue, isAnyChildNull, isNull, isVariable, reset, toString, validate

Methods inherited from class org.qtitools.qti.node.AbstractObject

getParentItem, getParentResult, getParentTest, setParent

Methods inherited from class org.qtitools.qti.node.AbstractNode

attrToXmlString, bodyToXmlString, getAttributes, getFullName, getIndent, getNode, getNode, getNode, getNodeGroups, getParentRoot, getSimpleName, getSourceFile, getSourceNode, getSourceString, getSourceUrl, hasChildNodes, load, load, load, load, loadAttributes, readChild, readChildren, setParent, setSourceFile, setSourceNode, setSourceString, setSourceUrl, toXmlString, toXmlString, validateChildren

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.qtitools.qti.node.XmlObject

getParentItem, getParentResult, getParentTest, setParent

Methods inherited from interface org.qtitools.qti.node.XmlNode

getAttributes, getFullName, getNodeGroups, getParentRoot, getSimpleName, getSourceFile, getSourceNode, getSourceString, getSourceUrl, hasChildNodes, load, load, load, load, setSourceFile, setSourceNode, setSourceString, setSourceUrl, toXmlString, toXmlString

Field Detail

CLASS_TAG

public static final java.lang.String CLASS_TAG

Name of this class in xml schema.

See Also:

Constant Field Values

ATTR_MINIMUM_NAME

public static final java.lang.String ATTR_MINIMUM_NAME

Name of min attribute in xml schema.

See Also:

Constant Field Values

ATTR_MAXIMUM_NAME

public static final java.lang.String ATTR_MAXIMUM_NAME

Name of max attribute in xml schema.

See Also:

Constant Field Values

Constructor Detail

AnyN

public AnyN(ExpressionParent parent)

Constructs expression.

Parameters:

parent - parent of this expression

Method Detail

getClassTag

public java.lang.String getClassTag()

Description copied from interface: XmlNode

Gets QTI class name of this node.

QTI class name has very important role during loading/saving nodes.

For example: Java class name is AssessmentTest; QTI class name is assessmentTest.

Specified by:

getClassTag in interface XmlNode

Specified by:

getClassTag in class AbstractNode

Returns:

QTI class name of this node

getMinimum

public java.lang.Integer getMinimum()

Gets value of min attribute.

Returns:

value of min attribute

See Also:

setMinimum(java.lang.Integer)

setMinimum

public void setMinimum(java.lang.Integer minimum)

Sets new value of min attribute.

Parameters:

minimum - new value of min attribute

See Also:

getMinimum()

getMaximum

public java.lang.Integer getMaximum()

Gets value of max attribute.

Returns:

value of max attribute

See Also:

setMaximum(java.lang.Integer)

setMaximum

public void setMaximum(java.lang.Integer maximum)

Sets new value of max attribute.

Parameters:

maximum - new value of max attribute

See Also:

getMaximum()

validateAttributes

protected ValidationResult validateAttributes()

Description copied from class: AbstractNode

Validates attributes of this node.

Overrides:

validateAttributes in class AbstractNode

Returns:

result of validation

evaluateSelf

protected Value evaluateSelf(int depth)

Description copied from class: AbstractExpression

Evaluates this expression. All children must be already evaluated. Contains no checks.

Specified by:

evaluateSelf in class AbstractExpression

Parameters:

depth - depth of this expression in expression tree (root's depth = 0)

Returns:

result of evaluation