com.tensegrity.generic.constraint
Class NegateConstraint

java.lang.Object
  com.tensegrity.generic.constraint.AbstractConstraint
      com.tensegrity.generic.constraint.NegateConstraint

All Implemented Interfaces:

Constraint, UnaryConstraint

public final class NegateConstraint

extends com.tensegrity.generic.constraint.AbstractConstraint

implements UnaryConstraint

This Constraint negates the value returned by the specified child Constraint.

Version:

$Id: NegateConstraint.java,v 1.27 2005/04/01 15:40:21 MichaelKegel Exp $

Author:

M. Kegel,

See Also:

Constraint, ConstraintParser

Field Summary

protected java.lang.String

lastError string used to trace for the last error

Method Summary

Constraint	intern() Pools this constraint analogous to the java.lang.String.intern() method.
java.lang.String	toString() Returns a string representation of this constraint and its children (if any).
void	trace(java.lang.StringBuffer sb) This method is called to trace for the last error.
boolean	validate(java.lang.Object value) Validates this contraint against a given value.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.tensegrity.generic.constraint.Constraint

intern

Field Detail

lastError

protected java.lang.String lastError

string used to trace for the last error

Method Detail

validate

public boolean validate(java.lang.Object value)

Description copied from interface: Constraint

Validates this contraint against a given value.
Notice:The given argument may not be null.

Specified by:

validate in interface Constraint

Parameters:

value - the object to validate. It is not allowed to pass in null as an argument.

Returns:

true if this value confirms to this constraints and false if it doesn't.

trace

public void trace(java.lang.StringBuffer sb)

Description copied from interface: Constraint

This method is called to trace for the last error.
Notice:
The given argument may not be null.

Specified by:

trace in interface Constraint

Parameters:

sb - the stringbuffer to append the last error to.

toString

public java.lang.String toString()

Returns a string representation of this constraint and its children (if any).

Returns:

string representation of this constraint.

intern

public Constraint intern()

Pools this constraint analogous to the java.lang.String.intern() method. This method is not threadsafe.

Specified by:

intern in interface Constraint

Returns:

the pooled instance of this constraint. The returned object reference is the same as the this-reference if this object has not been pooled before.