Main.java

package jiff;

import java.util.List;

import java.io.File;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {

    public static void main(String[] args) throws Exception {
        JsonDiff diff = new JsonDiff();
        String file1 = null;
        String file2 = null;
        for (String arg : args) {
            if ("-a0".equals(arg)) {
                diff.setOption(JsonDiff.Option.ARRAY_ORDER_INSIGNIFICANT);
            } else if ("-a1".equals(arg)) {
                diff.setOption(JsonDiff.Option.ARRAY_ORDER_SIGNIFICANT);
            } else if ("-p0".equals(arg)) {
                diff.setOption(JsonDiff.Option.RETURN_LEAVES_ONLY);
            } else if ("-p1".equals(arg)) {
                diff.setOption(JsonDiff.Option.RETURN_PARENT_DIFFS);
            } else if (file1 == null) {
                file1 = arg;
            } else if (file2 == null) {
                file2 = arg;
            } else {
                throw new RuntimeException("Invalid option:" + arg);
            }
        }
        if (file1 != null && file2 != null) {
            ObjectMapper mapper = new ObjectMapper();
            JsonNode node1 = mapper.readTree(new File(file1));
            JsonNode node2 = mapper.readTree(new File(file2));
            List<JsonDelta> list = diff.computeDiff(node1, node2);
            for (JsonDelta x : list) {
                System.out.println(x);
            }
        } else {
            printHelp();
        }
    }

    private static void printHelp() {
        System.out.println("jiff [options] file1 file2\n"
                + "\n"
                + "Options:\n"
                + "  -a1 : Array ordering significant\n"
                + "  -a0 : Array ordering not significant (default)\n"
                + "  -p1 : Return deltas for parents\n"
                + "  -p0 : Return deltas for leaves only (default)");
    }
}