Package org.apache.cayenne.exp.property
Class EntityProperty<E extends Persistent>
- java.lang.Object
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- org.apache.cayenne.exp.property.BaseProperty<E>
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- org.apache.cayenne.exp.property.EntityProperty<E>
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- All Implemented Interfaces:
PathProperty<E>
,Property<E>
,RelationshipProperty<E>
public class EntityProperty<E extends Persistent> extends BaseProperty<E> implements RelationshipProperty<E>
Property that represents to-one relationships.Usage examples in where clause:
ObjectSelect.query(Paintings.class) .where(Painting.TO_ARTIST.dot(Artist.ARTIST_NAME).eq("Pablo Picasso"));
Usage examples in column select, in this case full Artist entity will be returned in the result:
ObjectSelect .columnQuery(Paintings.class, Painting.PAINTING_TITLE, Painting.TO_ARTIST);
- Since:
- 4.2
- See Also:
org.apache.cayenne.exp.property
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Field Summary
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Fields inherited from class org.apache.cayenne.exp.property.BaseProperty
expressionSupplier, name, type
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Constructor Summary
Constructors Modifier Constructor Description protected
EntityProperty(String name, Expression expression, Class<E> type)
Constructs a new property with the given name and expression
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description EntityProperty<E>
alias(String alias)
Creates alias with different name for this propertyEntityProperty<E>
enclosing()
Expression
eqId(Object id)
Expression
inId(Object firstId, Object... moreIds)
Expression
inId(Collection<Object> ids)
Expression
neqId(Object id)
Expression
ninId(Object firstId, Object... moreIds)
Expression
ninId(Collection<Object> ids)
EntityProperty<E>
outer()
Returns a version of this property that represents an OUTER join.-
Methods inherited from class org.apache.cayenne.exp.property.BaseProperty
asc, ascInsensitive, ascInsensitives, ascs, count, countDistinct, desc, descInsensitive, descInsensitives, descs, eq, eq, equals, function, function, getAlias, getExpression, getFrom, getFromAll, getName, getType, hashCode, in, in, in, isFalse, isNotNull, isNull, isTrue, ne, ne, nin, nin, nin, operator, operator, path, setIn, setInAll
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.apache.cayenne.exp.property.PathProperty
dot, dot, dot, dot, dot
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Methods inherited from interface org.apache.cayenne.exp.property.Property
getAlias, getExpression, getName, getType
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Constructor Detail
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EntityProperty
protected EntityProperty(String name, Expression expression, Class<E> type)
Constructs a new property with the given name and expression- Parameters:
name
- of the property (will be used as alias for the expression)expression
- expression for propertytype
- of the property- See Also:
PropertyFactory.createBase(String, Expression, Class)
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Method Detail
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eqId
public Expression eqId(Object id)
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inId
public Expression inId(Collection<Object> ids)
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inId
public Expression inId(Object firstId, Object... moreIds)
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neqId
public Expression neqId(Object id)
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ninId
public Expression ninId(Collection<Object> ids)
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ninId
public Expression ninId(Object firstId, Object... moreIds)
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alias
public EntityProperty<E> alias(String alias)
Creates alias with different name for this property- Overrides:
alias
in classBaseProperty<E extends Persistent>
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outer
public EntityProperty<E> outer()
Returns a version of this property that represents an OUTER join. It is up to caller to ensure that the property corresponds to a relationship, as "outer" attributes make no sense.- Specified by:
outer
in interfaceRelationshipProperty<E extends Persistent>
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enclosing
public EntityProperty<E> enclosing()
- Overrides:
enclosing
in classBaseProperty<E extends Persistent>
- Returns:
- property that will be translated relative to parent query
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