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java.lang.Objectorg.castor.cpa.query.object.AbstractQueryObject
org.castor.cpa.query.object.expression.AbstractExpression
org.castor.cpa.query.object.AbstractField
org.castor.cpa.query.object.ProjectionImpl
public final class ProjectionImpl
Final immutable class that a projection of a select query.
Constructor Summary | |
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ProjectionImpl(Field field)
Construct projection with given field. |
|
ProjectionImpl(Field field,
java.lang.String alias)
Construct projection with given field and alias. |
Method Summary | |
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java.lang.String |
getAlias()
Gets the alias of the projection. |
Field |
getField()
Gets the field or schema of the projection. |
java.lang.String |
toFullString()
Append full string representation of projection to the given StringBuilder . |
java.lang.StringBuilder |
toFullString(java.lang.StringBuilder sb)
Append full string representation of projection to the given StringBuilder . |
java.lang.StringBuilder |
toString(java.lang.StringBuilder sb)
Append a string representation of the object to the given StringBuilder . |
Methods inherited from class org.castor.cpa.query.object.AbstractField |
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field, in, isNotNull, isNull, notIn |
Methods inherited from class org.castor.cpa.query.object.AbstractQueryObject |
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toString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface org.castor.cpa.query.Field |
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field, in, isNotNull, isNull, notIn |
Constructor Detail |
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public ProjectionImpl(Field field)
field
- The field or schema of the projection.public ProjectionImpl(Field field, java.lang.String alias)
field
- The field or schema of the projection.alias
- The alias of the projection.Method Detail |
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public Field getField()
public java.lang.String getAlias()
public java.lang.StringBuilder toString(java.lang.StringBuilder sb)
StringBuilder
.
In general, the toString method for query objects appends a string that textually
represents this object. The result should be a query string that complies to EJB QL
specification as long as the query object represents a syntay element of it. It is
required that all subclasses override this method.
The toString method defined at class Object is overwritten and calls this method.
toString
in interface QueryObject
sb
- StringBuilder to append the string representation of this object to.
public java.lang.StringBuilder toFullString(java.lang.StringBuilder sb)
StringBuilder
.
For projection toString() method returns alias only. To get full projection string
one has to call toFullString() method.
toFullString
in interface Projection
sb
- StringBuilder to append the string representation of this object to.
public java.lang.String toFullString()
StringBuilder
.
For projection toString() method returns alias only. To get full projection string
one has to call toFullString() method.
toFullString
in interface Projection
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