public class ComparisonExpressionStateObject extends CompoundExpressionStateObject
There is one exception to this rule: it is valid to compare numeric values for which the rules of numeric promotion apply. Conditional expressions attempting to compare non-like type values are disallowed except for this numeric case.
Note that the arithmetic operators and comparison operators are permitted to be applied to state-fields and input parameters of the wrapped Java class equivalents to the primitive numeric Java types. Two entities of the same abstract schema type are equal if and only if they have the same primary key value. Only equality/inequality comparisons over enumeration constants are required to be supported.
JPA 1.0 - BNF:
comparison_expression ::= string_expression comparison_operator {string_expression | all_or_any_expression} |
boolean_expression {=|<>} {boolean_expression | all_or_any_expression} |
enum_expression {=|<>} {enum_expression | all_or_any_expression} |
datetime_expression comparison_operator {datetime_expression | all_or_any_expression} |
entity_expression {=|<>} {entity_expression | all_or_any_expression} |
arithmetic_expression comparison_operator {arithmetic_expression | all_or_any_expression}
JPA 2.0 - BNF:
comparison_expression ::= string_expression comparison_operator {string_expression | all_or_any_expression} |
boolean_expression {=|<>} {boolean_expression | all_or_any_expression} |
enum_expression {=|<>} {enum_expression | all_or_any_expression} |
datetime_expression comparison_operator {datetime_expression | all_or_any_expression} |
entity_expression {=|<>} {entity_expression | all_or_any_expression} |
arithmetic_expression comparison_operator {arithmetic_expression | all_or_any_expression} |
entity_type_expression {=|<>} entity_type_expression}
ComparisonExpression
Modifier and Type | Field and Description |
---|---|
static java.lang.String |
IDENTIFIER_PROPERTY
Notifies the identifier property has changed.
|
LEFT_STATE_OBJECT_PROPERTY, RIGHT_STATE_OBJECT_PROPERTY
Constructor and Description |
---|
ComparisonExpressionStateObject(StateObject parent,
StateObject leftStateObject,
java.lang.String identifier,
StateObject rightStateObject)
Creates a new
ComparisonExpressionStateObject . |
ComparisonExpressionStateObject(StateObject parent,
java.lang.String identifier)
Creates a new
ComparisonExpressionStateObject . |
ComparisonExpressionStateObject(StateObject parent,
java.lang.String leftJpqlFragment,
java.lang.String identifier,
java.lang.String rightJpqlFragment)
Creates a new
ComparisonExpressionStateObject . |
Modifier and Type | Method and Description |
---|---|
void |
accept(StateObjectVisitor visitor)
Visits this
StateObject by the given visitor . |
ComparisonExpression |
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.
|
boolean |
isEquivalent(StateObject stateObject)
Determines whether the given
StateObject is equivalent to this one, i.e. the
information of both StateObject is the same. |
void |
setExpression(ComparisonExpression 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 . |
void |
setIdentifier(java.lang.String identifier)
Sets the comparison identifier to one of the following: <, <=, =, >=, <>.
|
protected void |
validateIdentifier(java.lang.String identifier) |
addChildren, getLeft, getRight, hasLeft, hasRight, parseLeft, parseRight, setLeft, setRight, toTextInternal
acceptUnknownVisitor, 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, toText
public static final java.lang.String IDENTIFIER_PROPERTY
public ComparisonExpressionStateObject(StateObject parent, StateObject leftStateObject, java.lang.String identifier, StateObject rightStateObject)
ComparisonExpressionStateObject
.parent
- The parent of this state object, which cannot be null
leftStateObject
- The StateObject
representing the left expressionidentifier
- The comparison identifier, either <, <=, =, >=, <>rightStateObject
- The StateObject
representing the right expressionjava.lang.NullPointerException
- The given parent cannot be null
public ComparisonExpressionStateObject(StateObject parent, java.lang.String identifier)
ComparisonExpressionStateObject
.parent
- The parent of this state object, which cannot be null
identifier
- The comparison identifier, either <, <=, =, >=, <>java.lang.NullPointerException
- The given parent cannot be null
public ComparisonExpressionStateObject(StateObject parent, java.lang.String leftJpqlFragment, java.lang.String identifier, java.lang.String rightJpqlFragment)
ComparisonExpressionStateObject
.parent
- The parent of this state object, which cannot be null
leftJpqlFragment
- The string representation of the left expression to parse and to
convert into a StateObject
identifier
- The comparison identifier, either <, <=, =, >=, <>rightJpqlFragment
- The string representation of the right expression to parse and to
convert into a StateObject
java.lang.NullPointerException
- The given parent cannot be null
public void accept(StateObjectVisitor visitor)
StateObject
by the given visitor
.visitor
- The visitor
to visit this objectpublic ComparisonExpression getExpression()
StateObject
representation of the JPQL query
was created by parsing an existing JPQL query.getExpression
in interface StateObject
getExpression
in class CompoundExpressionStateObject
StateObject
or null
when the JPQL query is manually created (i.e. not from a string)public java.lang.String getIdentifier()
StateObjects
.getIdentifier
in class CompoundExpressionStateObject
protected java.lang.String getLeftQueryBNFId()
getLeftQueryBNFId
in class CompoundExpressionStateObject
protected java.lang.String getRightQueryBNFId()
getRightQueryBNFId
in class CompoundExpressionStateObject
public boolean isEquivalent(StateObject stateObject)
StateObject
is equivalent to this one, i.e. the
information of both StateObject
is the same.isEquivalent
in interface StateObject
isEquivalent
in class CompoundExpressionStateObject
stateObject
- The StateObject
to compare its content to this onetrue
if both object are equivalent; false
otherwisepublic void setExpression(ComparisonExpression 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 comparison
expressionpublic void setIdentifier(java.lang.String identifier)
identifier
- The new comparison identifier, either <, <=, =, >=, <>protected void validateIdentifier(java.lang.String identifier)