org.qtitools.qti.group.expression
Class ExpressionGroup

java.lang.Object
  org.qtitools.qti.group.AbstractNodeGroup
      org.qtitools.qti.group.expression.ExpressionGroup

All Implemented Interfaces:

java.io.Serializable, NodeGroup, Validatable

public class ExpressionGroup
extends AbstractNodeGroup

Group of expression children.

Author:

Jonathon Hare

See Also:

Serialized Form

Constructor Summary

ExpressionGroup(ExpressionParent parent, java.lang.Integer minimum, java.lang.Integer maximum)
Constructs group.

Method Summary

Expression	create(java.lang.String classTag) Creates child with given QTI class name.
java.util.List<java.lang.String>	getCurrentSupportedClasses(int index) Returns list of all currently possible QTI class names (all currently possible children in this group).
Expression	getExpression() Gets child.
java.util.List<Expression>	getExpressions() Gets list of all children.
ExpressionParent	getParent() Gets parent node of group.
boolean	isGeneral() Returns true if group can contain children with different QTI class name; false otherwise.
void	setExpression(Expression expression) Sets new child.

Methods inherited from class org.qtitools.qti.group.AbstractNodeGroup

getAllSupportedClasses, getChild, getChildren, getFullName, getMaximum, getMinimum, getName, load, setChild, toXmlString, validate

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionGroup

public ExpressionGroup(ExpressionParent parent,
                       java.lang.Integer minimum,
                       java.lang.Integer maximum)

Constructs group.

Parameters:

parent - parent of created group

minimum - minimum required children of created group

maximum - maximum allowed children of created group

Method Detail

getParent

public ExpressionParent getParent()

Description copied from interface: NodeGroup

Gets parent node of group.

Specified by:

getParent in interface NodeGroup

Overrides:

getParent in class AbstractNodeGroup

Returns:

parent node of group

isGeneral

public boolean isGeneral()

Description copied from interface: NodeGroup

Returns true if group can contain children with different QTI class name; false otherwise.

Specified by:

isGeneral in interface NodeGroup

Overrides:

isGeneral in class AbstractNodeGroup

Returns:

true if group can contain children with different QTI class name; false otherwise

getCurrentSupportedClasses

public java.util.List<java.lang.String> getCurrentSupportedClasses(int index)

Description copied from interface: NodeGroup

Returns list of all currently possible QTI class names (all currently possible children in this group).

This list can change in time (it contains every possible QTI class name for current time (conditions)).

For example: expression delete can contain on first position only expressions which produce single value and on second position only expressions which produce multiple or ordered cardinality.

Specified by:

getCurrentSupportedClasses in interface NodeGroup

Overrides:

getCurrentSupportedClasses in class AbstractNodeGroup

Parameters:

index - index of children in group

Returns:

list of all currently possible QTI class names (all currently possible children in this group)

getExpression

public Expression getExpression()

Gets child.

Returns:

child

See Also:

setExpression(org.qtitools.qti.node.expression.Expression)

setExpression

public void setExpression(Expression expression)

Sets new child.

Parameters:

expression - new child

See Also:

getExpression()

getExpressions

public java.util.List<Expression> getExpressions()

Gets list of all children.

Returns:

list of all children

create

public Expression create(java.lang.String classTag)

Creates child with given QTI class name.

Parameter classTag is needed only if group can contain children with different QTI class names.

Parameters:

classTag - QTI class name (this parameter is needed)

Returns:

created child