Answered: ow is FunctionDefinitionNode and…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Related questions

Question

Below is FunctionDefinitionNode and BuiltInFunctionDefinitionNode. Please add the appropriate parameters for BuiltInFunctionDefinitionNode to fix the error attached as an image.

FunctionDefinitionNode.java

import java.util.List;

public class FunctionDefinitionNode extends Node {

private String name;

private List<String> parameters;

public FunctionDefinitionNode(String name, List<String> parameters) {

this.name = name;

this.parameters = parameters;

}

public String getName() {

return name;

}

public List<String> getParameters() {

return parameters;

}

public String ToString() {

return "FunctionNode: [Name, Parameters]";

}

BuiltInFunctionDefinitionNode.java

import java.util.HashMap;

import java.util.function.Function;

public class BuiltInFunctionDefinitionNode extends FunctionDefinitionNode {

private Function<HashMap<String, InterpreterDataType>, String> execute;

private boolean isVariadic;

public BuiltInFunctionDefinitionNode(Function<HashMap<String, InterpreterDataType>, String> execute, boolean isVariadic) {

super(/* pass appropriate parameters to the superclass constructor if it exists */);

this.execute = execute;

this.isVariadic = isVariadic;

}

public String execute(HashMap<String, InterpreterDataType> parameters) {

return this.execute.apply(parameters);

}

9
package mypack;
import java.util.HashMap;
public class Built In FunctionDefinitionNode extends FunctionDefinitionNode
private Function<HashMap<String, InterpreterDataType>, String> execute;
private boolean isVariadic;
}
public Built In FunctionDefinitionNode (Function<HashMap<String, InterpreterDataType>, String> execute, boolea
super (/* pass appropriate parameters to the superclass constructor if it exists */)
this.exec The constructor Function DefinitionNode() is undefined
this.isVa
3 quick fixes available:
}
+ Add arguments to match 'Function Definition Node(String, List<String>)'
public String Change constructor 'Function DefinitionNode(String, List<String>)': Remove parameters 'String, List<String>'
return thCreate constructor 'Function DefinitionNode()'
}

Expert Solution

Step 1: Description about code:

1- Do not declare the access modifier in front of the variable inside the FunctionDefinitionNode class.

2- extends the keyword used to inherit parent class features to the child class.

3- super keyword used to declare a constructor in the child class with parent class variable.

4- Please check the following updated code and output screenshot.

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions