ch.fritteli.maze.generator.renderer.json.JsonRenderer Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of maze-generator Show documentation

A-Maze-R, The Maze Generator. It is a library for generating mazes in various output formats.

The newest version!

package ch.fritteli.maze.generator.renderer.json;

import ch.fritteli.maze.generator.json.JsonCell;
import ch.fritteli.maze.generator.json.JsonMaze;
import ch.fritteli.maze.generator.model.Maze;
import ch.fritteli.maze.generator.renderer.Renderer;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import org.jetbrains.annotations.NotNull;

import java.util.ArrayList;
import java.util.List;

public class JsonRenderer implements Renderer {

    @NotNull
    private final ObjectMapper objectMapper;

    private JsonRenderer() {
        this.objectMapper = new ObjectMapper()
                .enable(SerializationFeature.INDENT_OUTPUT);
    }

    @NotNull
    public static JsonRenderer newInstance() {
        return new JsonRenderer();
    }

    @NotNull
    private static JsonMaze createSingleCellMaze() {
        // This is the only cell.
        final JsonCell cell = new JsonCell();
        cell.setRight(true);
        cell.setLeft(true);
        cell.setSolution(true);
        // Wrap that in a nested list.
        final List> rows = new ArrayList<>();
        rows.add(new ArrayList<>());
        rows.getFirst().add(cell);
        // Wrap it all in an instance of JsonMaze.
        final JsonMaze jsonMaze = new JsonMaze();
        jsonMaze.setId("0");
        jsonMaze.setGrid(rows);
        return jsonMaze;
    }

    @NotNull
    private String toString(@NotNull final JsonMaze jsonMaze) {
        try {
            return this.objectMapper.writeValueAsString(jsonMaze);
        } catch (final JsonProcessingException e) {
            throw new RuntimeException(e);
        }
    }

    @NotNull
    @Override
    public String render(@NotNull final Maze maze) {
        final JsonMaze jsonMaze;
        if (maze.getWidth() == 0 || maze.getHeight() == 0) {
            jsonMaze = createSingleCellMaze();
        } else {
            final Generator generator = new Generator(maze);
            jsonMaze = generator.generate();
        }
        return toString(jsonMaze);
    }
}