Parser.java is incomplete. Where is the logic for each method as mentioned in the comments. I need the logic for each method. Attached is image of what I exactly mean. HEHEHNISEM IN MA 4 7 521222324252627282930313233343536373839404142434445464748495051// Method to parse variable reference for the $ operatorpublic Operatione ParselValueDollar ()// You need to implement this logic to create an OperationNode for the $ operator.// Get the value of the $ operator appropriately.return null; // Replace with actual implementation.}// Method to parse constants and patternspublic Constant OrNode PatternNode ParseBottomLevel ConstantsAndPatterns ()}// You need to implement this logic to detect strings, numbers, and patterns// and create appropriate nodes.return null; // Replace with actual implementation.// Method to parse parenthesespublic OperationNode ParseBottomLevelParenthesis() throws ParseException {if (tokenHandler.MatchAndRemove (Token. TokenType. LPAREN) != null) {// You need to implement the logic to get the contents of the parenthesis.// Create an OperationNode for the contents.// Handle the closing parenthesis as well.// Example: (expr)return null; // Replace with actual implementation.} else {throw new ParseException("Expected '('", tokenHandler.getCurrentToken().getStart());}}// Existing code...// Method to parse unary operators// You mentioned that all four unary operators are correct, so ensure they are correctly parsed.

Answered: Parser.java is incomplete. Where is the…

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

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Parser.java is incomplete. Where is the logic for each method as mentioned in the comments. I need the logic for each method. Attached is image of what I exactly mean.

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// Method to parse variable reference for the $ operator
public Operatione ParselValueDollar ()
// You need to implement this logic to create an OperationNode for the $ operator.
// Get the value of the $ operator appropriately.
return null; // Replace with actual implementation.
}
// Method to parse constants and patterns
public Constant OrNode PatternNode ParseBottomLevel ConstantsAndPatterns ()
}
// You need to implement this logic to detect strings, numbers, and patterns
// and create appropriate nodes.
return null; // Replace with actual implementation.
// Method to parse parentheses
public OperationNode ParseBottomLevelParenthesis() throws ParseException {
if (tokenHandler.MatchAndRemove (Token. TokenType. LPAREN) != null) {
// You need to implement the logic to get the contents of the parenthesis.
// Create an OperationNode for the contents.
// Handle the closing parenthesis as well.
// Example: (expr)
return null; // Replace with actual implementation.
} else {
throw new ParseException("Expected '('", tokenHandler.getCurrentToken().getStart());
}
}
// Existing code...
// Method to parse unary operators
// You mentioned that all four unary operators are correct, so ensure they are correctly parsed.

Expert Solution

Step 1: Java Program:

Answer:

Here I provide code for all the classes you need.

Operation.java

public enum Operation {
ADD,
SUBTRACT,
MULTIPLY,
DIVIDE,
VARIABLE,
CONSTANT
}

This is the code for the given class.

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