ObjectUtils.java

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package br.ufrgs.inf.prosoft.memoizeit;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;

/**
 *
 * @author romulo
 */
public class ObjectUtils {

    public static Object truncateObject(Object object, int depth) {
        if (depth == 0) {
            object = "...";
        }
        if (object instanceof Map) {
            Map<String, Object> map = (Map<String, Object>) object;
            map.entrySet().forEach((entry) -> {
                truncateObject(entry.getValue(), depth - 1);
            });
        } else if (object instanceof Collection) {
            Collection collection = (Collection) object;
            collection.forEach((item) -> {
                truncateObject(item, depth - 1);
            });
        }
        return object;
    }

    public static List<Object> deepCopy(List<Object> object) {
        List<Object> collection = new ArrayList<>();
        object.forEach((item) -> {
            collection.add(deepCopy(item));
        });
        return collection;
    }

    public static Object deepCopy(Object object) {
        try {
            try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream)) {
                objectOutputStream.writeObject(object);
                try (ByteArrayInputStream inputStream = new ByteArrayInputStream(outputStream.toByteArray()); ObjectInputStream objectInputStream = new ObjectInputStream(inputStream)) {
                    return objectInputStream.readObject();
                }
            }
        } catch (IOException | ClassNotFoundException ex) {
            System.err.println("[MemoizeIt] clone exception: " + ex);
            return null;
        }
    }
}