com.datacoper.maven.util.CollectionsUtil.java Source code

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Here is the source code for com.datacoper.maven.util.CollectionsUtil.java

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package com.datacoper.maven.util;

import com.google.common.collect.Iterables;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 *
 * @author alessandro
 */
public abstract class CollectionsUtil {

    private CollectionsUtil() {
    }

    public boolean isNotNullOrEmpty(Collection<?> collection) {
        return !isNullOrEmpty(collection);
    }

    public boolean isNullOrEmpty(Collection<?> collection) {
        return collection != null && collection.isEmpty();
    }

    @SuppressWarnings("unchecked")
    public static <E, T extends Collection<E>> List<E> concat(T... collections) {
        Iterable<E> concat = Iterables.concat(collections);

        List<E> list = new ArrayList<>();
        concat.forEach(item -> {
            list.add(item);
        });

        return list;
    }
}