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Geospatial functions

: double cx = Math.toRadians(fromLat); double cy = Math.toRadians(fromLon); double px = Math.toRadians(toLat); double py = Math.toRadians(toLon); // see http://de.wikipedia.org/wiki/Orthodrome double gamma = Math.acos(Math.sin(cx) * Math.sin(px) + Math.cos(cx

CRUD Database Operations with JPA

a Double object reflecting the average x value of all the Point objects in

Entity Management Settings

(which is more efficient than double cascade) is sufficient. The <dirty-tracking> element

javax.persistence.criteria.CriteriaBuilder

="Interface in javax.persistence.criteria">Expression<Double>

sumAsDouble(x)

/jpa/criteria/Expression" title="Interface in javax.persistence.criteria">Expression<Double> ... , returning a Double result. Parameters

toDouble(number)

/jpa/criteria/Expression" title="Interface in javax.persistence.criteria">Expression<Double> ... > Expression<Double> Since: JPA 2.0

Step 2: Entity Class and Persistence Unit

double click and then moving to the XML tab in the editor window). Use copy and paste

javax.jdo.spi.StateManager

"> double double" title="Method of javax.jdo.spi.StateManager">getDoubleFieldPersistenceCapable  pc, int field, double currentValue)

javax.jdo.spi.PersistenceCapable.ObjectIdFieldManager

="header"> double double" title ...  fieldNumber, double value) Store one field into

setDoubleField(pc, field, currentValue, newValue)

>  int field,   double currentValue,   double