org.mmbase.storage.search

Interface CompositeConstraint

All Superinterfaces:

Constraint

All Known Implementing Classes:

BasicCompositeConstraint, RemoteCompositeConstraint_Proxy

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:

$Id$

Author:

Rob van Maris

Field Summary

Fields

Modifier and Type	Field and Description
static int	LOGICAL_AND Logical operator 'and'
static String[]	LOGICAL_OPERATOR_DESCRIPTIONS Operator descriptions corresponding to the operator values: LOGICAL_AND, and LOGICAL_OR
static int	LOGICAL_OR Logical operator 'or'

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj) Compares this constraint to the specified object.
List<Constraint>	getChilds() Gets the child constraints.
int	getLogicalOperator() Gets the logical operator used to combine the child constraints.
int	hashCode()
String	toString() Returns a string representation of this CompositeConstraint.

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

getBasicSupportLevel, isInverse, setUnmodifiable

Field Detail

LOGICAL_AND

static final int LOGICAL_AND

Logical operator 'and'

See Also:

Constant Field Values

LOGICAL_OR

static final int LOGICAL_OR

Logical operator 'or'

See Also:

Constant Field Values

LOGICAL_OPERATOR_DESCRIPTIONS

static final String[] LOGICAL_OPERATOR_DESCRIPTIONS

Operator descriptions corresponding to the operator values: LOGICAL_AND, and LOGICAL_OR

Method Detail

getChilds

List<Constraint> getChilds()

Gets the child constraints.

getLogicalOperator

int getLogicalOperator()

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

equals

boolean equals(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

Overrides:

equals in class Object

Parameters:

obj - The object to compare with.

Returns:

true if the objects are equal, false otherwise.

hashCode

int hashCode()

Specified by:

hashCode in interface Constraint

Overrides:

hashCode in class Object

toString

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()

Overrides:

toString in class Object

Returns:

A string representation of this CompositeConstraint.