public class AndExpressionStateObject extends LogicalExpressionStateObject
AND logical operator chains multiple criteria together. A valid operand
of an AND operator must be one of: TRUE,
FALSE, and NULL. The AND operator has
a higher precedence than the OR operator.
NULL represents unknown. Therefore, if one operand is NULL
and the other operand is FALSE the result is FALSE,
because one FALSE operand is sufficient for a FALSE
result. If one operand is NULL and the other operand is either
TRUE or NULL, the result is NULL
(unknown).
The following table shows how the AND operator is evaluated based on its two
operands:
TRUE FALSE NULL TRUE TRUE FALSE NULL FALSE FALSE FALSE FALSE NULL NULL FALSE NULL
conditional_term ::= conditional_term AND conditional_factorAndExpressionLEFT_STATE_OBJECT_PROPERTY, RIGHT_STATE_OBJECT_PROPERTY| Constructor and Description |
|---|
AndExpressionStateObject(StateObject parent)
Creates a new
AndExpressionStateObject. |
AndExpressionStateObject(StateObject parent,
StateObject leftStateObject,
StateObject rightStateObject)
Creates a new
AndExpressionStateObject. |
AndExpressionStateObject(StateObject parent,
java.lang.String leftJpqlFragment,
java.lang.String rightJpqlFragment)
Creates a new
AndExpressionStateObject. |
| Modifier and Type | Method and Description |
|---|---|
void |
accept(StateObjectVisitor visitor)
Visits this
StateObject by the given visitor. |
AndExpression |
getExpression()
Returns the actual parsed object if this
StateObject representation of the JPQL query
was created by parsing an existing JPQL query. |
java.lang.String |
getIdentifier()
Returns the identifier joining the two
StateObjects. |
protected java.lang.String |
getLeftQueryBNFId()
Returns the unique identifier of the BNF that will be used to parse a JPQL fragment as the
left side of the expression.
|
protected java.lang.String |
getRightQueryBNFId()
Returns the unique identifier of the BNF that will be used to parse a JPQL fragment as the
right side of the expression.
|
void |
setExpression(AndExpression expression)
Keeps a reference of the
parsed object object, which should only be
done when this object is instantiated during the conversion of a parsed JPQL query into
StateObjects. |
addChildren, getLeft, getRight, hasLeft, hasRight, isEquivalent, parseLeft, parseRight, setLeft, setRight, toTextInternalacceptUnknownVisitor, acceptUnknownVisitor, addProblems, addPropertyChangeListener, areEquivalent, buildProblem, buildProblem, buildStateObject, buildStateObjects, checkParent, children, decorate, equals, findIdentificationVariable, firePropertyChanged, getChangeSupport, getDeclaration, getDecorator, getGrammar, getManagedTypeProvider, getParent, getQueryBuilder, getRoot, getType, getType, getTypeHelper, getTypeRepository, hashCode, initialize, isDecorated, parent, parent, parent, removePropertyChangeListener, setExpression, setParent, toString, toString, toStringInternal, toStringItems, toTextpublic AndExpressionStateObject(StateObject parent)
AndExpressionStateObject.parent - The parent of this state object, which cannot be nulljava.lang.NullPointerException - The given parent cannot be nullpublic AndExpressionStateObject(StateObject parent, StateObject leftStateObject, StateObject rightStateObject)
AndExpressionStateObject.parent - The parent of this state object, which cannot be nullleftStateObject - The StateObject representing the left expressionrightStateObject - The StateObject representing the right expressionjava.lang.NullPointerException - The given parent cannot be nullpublic AndExpressionStateObject(StateObject parent, java.lang.String leftJpqlFragment, java.lang.String rightJpqlFragment)
AndExpressionStateObject.parent - The parent of this state object, which cannot be nullleftJpqlFragment - The string representation of the left expression to parse and to
convert into a StateObjectrightJpqlFragment - The string representation of the right expression to parse and to
convert into a StateObjectjava.lang.NullPointerException - The given parent cannot be nullpublic void accept(StateObjectVisitor visitor)
StateObject by the given visitor.visitor - The visitor to visit this objectpublic AndExpression getExpression()
StateObject representation of the JPQL query
was created by parsing an existing JPQL query.getExpression in interface StateObjectgetExpression in class LogicalExpressionStateObjectStateObject
or null when the JPQL query is manually created (i.e. not from a string)public java.lang.String getIdentifier()
StateObjects.getIdentifier in class CompoundExpressionStateObjectprotected java.lang.String getLeftQueryBNFId()
getLeftQueryBNFId in class CompoundExpressionStateObjectprotected java.lang.String getRightQueryBNFId()
getRightQueryBNFId in class CompoundExpressionStateObjectpublic void setExpression(AndExpression expression)
parsed object object, which should only be
done when this object is instantiated during the conversion of a parsed JPQL query into
StateObjects.expression - The parsed object representing a logical
AND expression