org.mmbase.storage.search
Interface FieldCompareConstraint

All Superinterfaces:

Constraint, FieldConstraint

All Known Subinterfaces:

CompareFieldsConstraint, FieldValueConstraint, FieldValueDateConstraint

All Known Implementing Classes:

BasicCompareFieldsConstraint, BasicFieldCompareConstraint, BasicFieldValueConstraint, BasicFieldValueDateConstraint

public interface FieldCompareConstraint

extends FieldConstraint

A constraint that compares a stepfield value with another value.

This corresponds with comparison operators <, =, > and LIKE in SQL SELECT-syntax.

Since:

MMBase-1.7

Version:

$Id: FieldCompareConstraint.java,v 1.4 2005/04/25 14:56:57 pierre Exp $

Author:

Rob van Maris

Field Summary

static int	EQUAL Operator 'equal'
static int	GREATER Operator 'greater than'
static int	GREATER_EQUAL Operator 'greater than or equal'
static int	LESS Operator 'less than'
static int	LESS_EQUAL Operator 'less than or equal'
static int	LIKE Operator 'like'
static int	NOT_EQUAL Operator 'not equal'
static String[]	OPERATOR_DESCRIPTIONS Operator descriptions corresponding to the operator values: LESS, LESS_EQUAL, EQUAL, NOT_EQUAL, GREATER, GREATER_EQUAL, and LIKE

Method Summary

int	getOperator() Gets the operator used to compare values.

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

getField, isCaseSensitive

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

equals, getBasicSupportLevel, hashCode, isInverse

Field Detail

LESS

public static final int LESS

Operator 'less than'

See Also:

Constant Field Values

LESS_EQUAL

public static final int LESS_EQUAL

Operator 'less than or equal'

See Also:

Constant Field Values

EQUAL

public static final int EQUAL

Operator 'equal'

See Also:

Constant Field Values

NOT_EQUAL

public static final int NOT_EQUAL

Operator 'not equal'

See Also:

Constant Field Values

GREATER

public static final int GREATER

Operator 'greater than'

See Also:

Constant Field Values

GREATER_EQUAL

public static final int GREATER_EQUAL

Operator 'greater than or equal'

See Also:

Constant Field Values

LIKE

public static final int LIKE

Operator 'like'

See Also:

Constant Field Values

OPERATOR_DESCRIPTIONS

public static final String[] OPERATOR_DESCRIPTIONS

Operator descriptions corresponding to the operator values: LESS, LESS_EQUAL, EQUAL, NOT_EQUAL, GREATER, GREATER_EQUAL, and LIKE

Method Detail

getOperator

public int getOperator()

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.