Puzzle.java

package edu.unl.cse.bohn;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public abstract class Puzzle {
    protected String sampleData = "";
    protected boolean isProductionReady;

    public Puzzle(boolean isProductionReady) {
        this.isProductionReady = isProductionReady;
    }

    public abstract long computePart1(List<String> data);
    public abstract long computePart2(List<String> data);

    public void solvePuzzle(ImportData dataSource) {
        List<String> data = null;
        try {
            data = isProductionReady ? dataSource.importData() : List.of(sampleData.split(System.lineSeparator()));
        } catch (IOException ioException) {
            System.err.println("Could not retrieve data: " + ioException);
            System.exit(1);
        }
        System.out.println("Part 1: " + computePart1(data));
        System.out.println("Part 2: " + computePart2(data));
    }

    protected static List<Integer> toIntegerList(List<String> data) {
        return data.stream().mapToInt(Integer::valueOf).boxed().toList();
    }

    protected static char[][] toCharMatrix(List<String> data) {
        // I suspect this cast won't work
        return (char[][]) data.stream().map(String::toCharArray).toArray();
    }

    protected static int[][] toIntMatrix(List<String> data) {
        int[][] matrix = new int[data.size()][data.get(0).length()];
        Arrays.setAll(matrix, i -> data.get(i).chars().map(c -> c - '0').toArray());
        return matrix;
    }
}