com.deepoove.swagger.diff.compare.MapKeyDiff Maven / Gradle / Ivy

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package com.deepoove.swagger.diff.compare;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

public class MapKeyDiff {

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

	private MapKeyDiff() {
		this.sharedKey = new ArrayList();
	}

	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;
	}

}