org.apache.openjpa.persistence.query
public class IsEmptyExpression extends java.lang.Object
Modifier and Type | Field and Description |
---|---|
protected Expression |
_e |
protected UnaryConditionalOperator |
_op |
static java.lang.String |
CLOSE_BRACE |
static java.lang.String |
COMMA |
static java.lang.String |
EMPTY |
static java.lang.String |
OPEN_BRACE |
static java.lang.String |
SPACE |
Constructor and Description |
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IsEmptyExpression(Expression op) |
Modifier and Type | Method and Description |
---|---|
Predicate |
and(Predicate predicate)
Creates an AND of the predicate with the argument.
|
java.lang.String |
asExpression(org.apache.openjpa.persistence.query.AliasContext ctx)
Get a JPQL fragment as used in WHERE clause.
|
java.lang.String |
asJoinable(org.apache.openjpa.persistence.query.AliasContext ctx)
Gets the string representation in FROM clause.
|
java.lang.String |
asProjection(org.apache.openjpa.persistence.query.AliasContext ctx)
Gets the string representation in SELECT projection.
|
java.lang.String |
getAliasHint(org.apache.openjpa.persistence.query.AliasContext ctx)
Gets the hint to be used while creating alias.
|
Expression |
getOperand() |
UnaryConditionalOperator |
getOperator() |
Predicate |
not()
Creates a negation of the predicate with the argument.
|
Predicate |
or(Predicate predicate)
Creates an OR of the predicate with the argument.
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
asJoinable, asProjection, getAliasHint
protected final Expression _e
protected final UnaryConditionalOperator _op
public static final java.lang.String SPACE
public static final java.lang.String OPEN_BRACE
public static final java.lang.String CLOSE_BRACE
public static final java.lang.String COMMA
public static final java.lang.String EMPTY
public IsEmptyExpression(Expression op)
public java.lang.String asExpression(org.apache.openjpa.persistence.query.AliasContext ctx)
Visitable
asExpression
in interface Visitable
public Expression getOperand()
public UnaryConditionalOperator getOperator()
public Predicate and(Predicate predicate)
Predicate
public Predicate or(Predicate predicate)
Predicate
public Predicate not()
Predicate
public java.lang.String asProjection(org.apache.openjpa.persistence.query.AliasContext ctx)
Visitable
asProjection
in interface Visitable
public java.lang.String getAliasHint(org.apache.openjpa.persistence.query.AliasContext ctx)
Visitable
getAliasHint
in interface Visitable
public java.lang.String asJoinable(org.apache.openjpa.persistence.query.AliasContext ctx)
Visitable
asJoinable
in interface Visitable