Class VariableNode

java.lang.Object
math.parser.VariableNode
All Implemented Interfaces:
Cloneable, ExpressionNode
public class VariableNode extends Object implements ExpressionNode

Name: VariableNode

Description: A node holding a double variable.

Date: 08/dic/06 Time: 15:56:59

Version:
1.0
Author:
Bertoli Marco

  • Field Details

    • value

      protected double value
      Value of the variable

    • error

      protected boolean error
      True if variable was not initialized

    • name

      protected String name
      Name of the variable

    • children

      protected ExpressionNode[] children
      An empty array with children

  • Constructor Details

    • VariableNode

      public VariableNode(String name, boolean error)
      Creates a new variable node with given name.
      Parameters:
      name - name of the variable
      error - throws an exception if value is get but variable is not initialized. Otherwise 0.0 is returned.

  • Method Details

    • count

      public int count()
      Description copied from interface: ExpressionNode
      Counts number of nodes in current subtree
      Specified by:
      count in interface ExpressionNode
      Returns:
      number of nodes (included root)

    • getDepth

      public int getDepth()
      Description copied from interface: ExpressionNode
      Returns depth of current subtree
      Specified by:
      getDepth in interface ExpressionNode
      Returns:
      depth of the tree

    • getSubtype

      public String getSubtype()
      Description copied from interface: ExpressionNode
      Returns more information on node type
      Specified by:
      getSubtype in interface ExpressionNode
      Returns:
      name of node function or operator symbol

    • getType

      public int getType()
      Description copied from interface: ExpressionNode
      Returns type of node
      Specified by:
      getType in interface ExpressionNode
      Returns:
      CONSTANT_NODE, VARIABLE_NODE, OPERATOR_NODE, FUNCTION_NODE

    • getValue

      public double getValue()
      Description copied from interface: ExpressionNode
      Returns value of target node
      Specified by:
      getValue in interface ExpressionNode
      Returns:
      value of node

    • setVariable

      public void setVariable(String name, double value)
      Description copied from interface: ExpressionNode
      Sets the value for a variable
      Specified by:
      setVariable in interface ExpressionNode
      Parameters:
      name - name of the variable to be set
      value - value for the variable

    • getChildrenNodes

      public ExpressionNode[] getChildrenNodes()
      Description copied from interface: ExpressionNode
      Returns children nodes of this node, ordered from leftmost to rightmost.
      Specified by:
      getChildrenNodes in interface ExpressionNode
      Returns:
      an array of children nodes. If node has no child, destination array has zero size.

    • clone

      public Object clone()
      Description copied from interface: ExpressionNode
      Clones current node
      Specified by:
      clone in interface ExpressionNode
      Overrides:
      clone in class Object
      Returns:
      deep copy of current node

    • toString

      public String toString()
      Description copied from interface: ExpressionNode
      Returns a string describing the entire tree
      Specified by:
      toString in interface ExpressionNode
      Overrides:
      toString in class Object
      Returns:
      string describing the entire tree