MOEA Framework 2.12
API Specification

org.moeaframework.util.tree
Class Constant

java.lang.Object
  extended by org.moeaframework.util.tree.Node
      extended by org.moeaframework.util.tree.Constant

public class Constant
extends Node

The node for defining a constant value. The inputs and outputs to this node are shown below:

Name Type Description
Return Value Number The constant value


Constructor Summary
Constant(boolean value)
          Constructs a new node for defining a constant boolean value.
Constant(Class<?> type, Object value)
          Constructs a new node for defining a constant Object.
Constant(double value)
          Constructs a new node for defining a constant floating-point number.
Constant(long value)
          Constructs a new node for defining a constant integer value.
 
Method Summary
 Constant copyNode()
          Returns a copy of this node, but without any children or parents assigned.
 Object evaluate(Environment environment)
          Evaluates this node in the context of the specified environment.
 String toString()
           
 
Methods inherited from class org.moeaframework.util.tree.Node
copyTree, getArgument, getArgumentType, getDepth, getFunctionAt, getFunctionAt, getMaximumHeight, getMinimumHeight, getNodeAt, getNodeAt, getNodeAt, getNumberOfArguments, getNumberOfFunctions, getNumberOfFunctions, getNumberOfNodes, getNumberOfNodes, getNumberOfNodes, getNumberOfTerminals, getNumberOfTerminals, getParent, getReturnType, getTerminalAt, getTerminalAt, isFixed, isTerminal, isValid, setArgument, setFixed, setFixedTree, size
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

Constant

public Constant(double value)
Constructs a new node for defining a constant floating-point number.

Parameters:
value - the floating-point number

Constant

public Constant(long value)
Constructs a new node for defining a constant integer value.

Parameters:
value - the integer value

Constant

public Constant(boolean value)
Constructs a new node for defining a constant boolean value.

Parameters:
value - the boolean value

Constant

public Constant(Class<?> type,
                Object value)
Constructs a new node for defining a constant Object. It is necessary to pass the type explicitly to ensure values such as null are handled correctly.

Parameters:
type - the type of the object
value - the object
Method Detail

copyNode

public Constant copyNode()
Description copied from class: Node
Returns a copy of this node, but without any children or parents assigned.

Specified by:
copyNode in class Node
Returns:
a copy of this node, but without any children or parents assigned

evaluate

public Object evaluate(Environment environment)
Description copied from class: Node
Evaluates this node in the context of the specified environment.

Specified by:
evaluate in class Node
Parameters:
environment - the execution environment
Returns:
the result of evaluating this node

toString

public String toString()
Overrides:
toString in class Node

MOEA Framework 2.12
API Specification

Copyright 2009-2016 MOEA Framework. All rights reserved.
Licensed under the GNU Lesser General Public License.
Return to the MOEA Framework homepage. Visit us on Github!