org.oreodata.predicates
Class CompoundPredicate

java.lang.Object
  |
  +--org.oreodata.predicates.Predicate
        |
        +--org.oreodata.predicates.CompoundPredicate

All Implemented Interfaces:

RecordFilter, java.io.Serializable

public class CompoundPredicate

extends Predicate

A Predicate that represents the AND, OR or XOR condition on two other predicates.

See Also:

Serialized Form

Field Summary

static int	INTERSECTION
static int	UNION

Fields inherited from class org.oreodata.predicates.Predicate

complement

Constructor Summary

protected

CompoundPredicate(int operation, Predicate lhs, Predicate rhs)

Method Summary

boolean	accept(Record rec) Does this record meet the filter criterion?
Predicate	getComplement()
java.lang.String	recType() says what kind of record type we are looking for, i.e.
java.lang.String	sqlEquivalent()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

UNION

public static final int UNION

See Also:

Constant Field Values

INTERSECTION

public static final int INTERSECTION

See Also:

Constant Field Values

Constructor Detail

CompoundPredicate

protected CompoundPredicate(int operation,
                            Predicate lhs,
                            Predicate rhs)

Method Detail

sqlEquivalent

public java.lang.String sqlEquivalent()

Specified by:

sqlEquivalent in interface RecordFilter

Specified by:

sqlEquivalent in class Predicate

Returns:

The SQL SELECT command that is the equivalent to this. A null value would indicate that we don't know the SQL command. In that case, the filter will have to be applied in-memory.

accept

public boolean accept(Record rec)

Description copied from interface: RecordFilter

Does this record meet the filter criterion?

Specified by:

accept in interface RecordFilter

Specified by:

accept in class Predicate

getComplement

public Predicate getComplement()

Specified by:

getComplement in class Predicate

recType

public java.lang.String recType()

Description copied from interface: RecordFilter

says what kind of record type we are looking for, i.e. the filter will only return results of a certain record type. If this returns null, it means that we could have heterogeneous results.

Specified by:

recType in interface RecordFilter

Specified by:

recType in class Predicate