hugegraph-sync/src/main/java/com/baidu/hugegraph/util/CollectionUtil.java

/*
 * Copyright 2017 HugeGraph Authors
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with this
 * work for additional information regarding copyright ownership. The ASF
 * licenses this file to You under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package com.baidu.hugegraph.util;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public final class CollectionUtil {

    @SuppressWarnings({ "unchecked", "rawtypes" })
    public static boolean containsAll(Collection a, Collection b) {
        return a.containsAll(b);
    }

    @SuppressWarnings("unchecked")
    public static <T> List<T> toList(Object array) {
        E.checkNotNull(array, "array");
        E.checkArgument(array.getClass().isArray(),
                        "The parameter of toList() must be an array: '%s'",
                        array.getClass().getSimpleName());

        int length = Array.getLength(array);
        List<T> list = new ArrayList<>(length);
        for (int i = 0; i < length; i++) {
            list.add((T) Array.get(array, i));
        }
        return list;
    }
}