org.mmbase.storage.search.implementation
Class BasicFieldCompareConstraint

java.lang.Object
  org.mmbase.storage.search.implementation.BasicConstraint
      org.mmbase.storage.search.implementation.BasicFieldConstraint
          org.mmbase.storage.search.implementation.BasicFieldCompareConstraint

All Implemented Interfaces:

Constraint, FieldCompareConstraint, FieldConstraint

Direct Known Subclasses:

BasicCompareFieldsConstraint, BasicFieldValueConstraint

public class BasicFieldCompareConstraint

extends BasicFieldConstraint

implements FieldCompareConstraint

Basic implementation. The tested operation is equality, unless it is explicitly set.

Since:

MMBase-1.7

Version:

$Id: BasicFieldCompareConstraint.java,v 1.5 2003/03/10 11:50:54 pierre Exp $

Author:

Rob van Maris

Field Summary

Fields inherited from interface org.mmbase.storage.search.FieldCompareConstraint

EQUAL, GREATER, GREATER_EQUAL, LESS, LESS_EQUAL, LIKE, NOT_EQUAL

Constructor Summary

protected

BasicFieldCompareConstraint(StepField field) Constructor.

Method Summary

boolean	equals(java.lang.Object obj) Compares this constraint to the specified object.
int	getOperator() Gets the operator used to compare values.
int	hashCode()
BasicFieldCompareConstraint	setOperator(int operator) Sets operator.

Methods inherited from class org.mmbase.storage.search.implementation.BasicFieldConstraint

getField, isCaseSensitive, setCaseSensitive

Methods inherited from class org.mmbase.storage.search.implementation.BasicConstraint

getBasicSupportLevel, isInverse, setInverse

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mmbase.storage.search.FieldConstraint

getField, isCaseSensitive

Methods inherited from interface org.mmbase.storage.search.Constraint

getBasicSupportLevel, isInverse

Constructor Detail

BasicFieldCompareConstraint

protected BasicFieldCompareConstraint(StepField field)

Constructor. Protected, so only subclasses can be instantiated.

Parameters:

field - The associated field.

Throws:

java.lang.IllegalArgumentException - when an invalid argument is supplied.

Method Detail

setOperator

public BasicFieldCompareConstraint setOperator(int operator)

Sets operator.

Returns:

This BasicFieldCompareConstraint instance.

Throws:

java.lang.IllegalArgumentException - when an invalid argument is supplied.

getOperator

public int getOperator()

Description copied from interface: FieldCompareConstraint

Gets the operator used to compare values. This must be one of the values declared here. The value LIKE is allowed only when the associated field is of string type.

Specified by:

getOperator in interface FieldCompareConstraint

equals

public boolean equals(java.lang.Object obj)

Description copied from interface: Constraint

Compares this constraint to the specified object. The result is true if and only if the argument is a non-null Constraint object representing the same constraint(s).

Specified by:

equals in interface Constraint

Overrides:

equals in class BasicFieldConstraint

hashCode

public int hashCode()

Specified by:

hashCode in interface Constraint

Overrides:

hashCode in class BasicFieldConstraint