org.mmbase.storage.search
Interface CompositeConstraint

All Superinterfaces:

Constraint

public interface CompositeConstraint

extends Constraint

A constraint combining several child constraints, using either logical AND or OR.

This corresponds to a AND- or OR-expression in SQL SELECT-syntax.

Since:

MMBase-1.7

Version:

$Id: CompositeConstraint.java,v 1.2 2003/03/10 11:50:44 pierre Exp $

Author:

Rob van Maris

Field Summary

static int	LOGICAL_AND
static int	LOGICAL_OR

Method Summary

boolean	equals(java.lang.Object obj) Compares this constraint to the specified object.
java.util.List	getChilds() Gets the child constraints.
int	getLogicalOperator() Gets the logical operator used to combine the child constraints.
int	hashCode()
java.lang.String	toString() Returns a string representation of this CompositeConstraint.

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

getBasicSupportLevel, isInverse

Field Detail

LOGICAL_AND

public static final int LOGICAL_AND

See Also:

Constant Field Values

LOGICAL_OR

public static final int LOGICAL_OR

See Also:

Constant Field Values

Method Detail

getChilds

public java.util.List getChilds()

Gets the child constraints.

getLogicalOperator

public int getLogicalOperator()

Gets the logical operator used to combine the child constraints. This must be either LOGICAL_AND or LOGICAL_OR.

equals

public boolean equals(java.lang.Object obj)

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

Specified by:

equals in interface Constraint

Parameters:

obj - The object to compare with.

Returns:

true if the objects are equal, false otherwise.

hashCode

public int hashCode()

Specified by:

hashCode in interface Constraint

toString

public java.lang.String toString()

Returns a string representation of this CompositeConstraint. The string representation has the form "CompositeConstraint(inverse:<:inverse>, operator:<operator>, childs:<childs>)" where

• <inverse>is the value returned by isInverse()
• <operator> is the value returned by getLogicalOperator()
• <childs> is the value returned by getChilds()

Returns:

A string representation of this CompositeConstraint.