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Utility for comparing two OpenAPI specifications.

There is a newer version: 1.2.0

package com.qdesrame.openapi.diff.compare;

import java.util.*;
import java.util.Map.Entry;

/**
 * compare two Maps by key
 *
 * @author QDesrame
 */
public class MapKeyDiff {

    private Map increased;
    private Map missing;
    private List sharedKey;

    private MapKeyDiff() {
        this.sharedKey = new ArrayList<>();
        this.increased = new HashMap<>();
        this.missing = new HashMap<>();
    }

    public static  MapKeyDiff diff(Map mapLeft,
                                               Map mapRight) {
        MapKeyDiff instance = new MapKeyDiff<>();
        if (null == mapLeft && null == mapRight) return instance;
        if (null == mapLeft) {
            instance.increased = mapRight;
            return instance;
        }
        if (null == mapRight) {
            instance.missing = mapLeft;
            return instance;
        }
        instance.increased = new LinkedHashMap<>(mapRight);
        instance.missing = new LinkedHashMap<>();
        for (Entry entry : mapLeft.entrySet()) {
            K leftKey = entry.getKey();
            V leftValue = entry.getValue();
            if (mapRight.containsKey(leftKey)) {
                instance.increased.remove(leftKey);
                instance.sharedKey.add(leftKey);

            } else {
                instance.missing.put(leftKey, leftValue);
            }

        }
        return instance;
    }

    public Map getIncreased() {
        return increased;
    }

    public Map getMissing() {
        return missing;
    }

    public List getSharedKey() {
        return sharedKey;
    }

}