Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 * #!
 * Ontopia Engine
 * #-
 * Copyright (C) 2001 - 2013 The Ontopia Project
 * #-
 * Licensed 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.
 * !#
 */

import java.util.Collection;
import java.util.HashSet;

import java.util.Objects;

import java.util.Set;

public class Main {
    /**
     * INTERNAL: Compares two collections to see if they contain the same
     * elements.
     *
     * @since 1.4.1
     */
    public static <T> boolean equalsUnorderedSet(Collection<T> coll1, Collection<T> coll2) {

        // Take care of nulls
        if (coll1 == null)
            if (coll2 == null)
                // 1: null 2: null
                return true;
            else
                // 1: null 2: not null
                return false;
        else if (coll2 == null)
            // 1: not null 2: null
            return false;

        // Compare set size
        int size1 = coll1.size();
        int size2 = coll2.size();
        if (size1 != size2)
            return false;

        // If both have 1 element compare first element
        if (size1 == 1) {
            return Objects.equals(coll1.iterator().next(), coll2.iterator().next());
        }

        // Compare collections as sets
        if (coll1 instanceof Set)
            if (coll2 instanceof Set)
                return coll1.equals(coll2);
            else
                return coll1.equals(new HashSet<T>(coll2));
        else if (coll2 instanceof Set)
            return coll2.equals(new HashSet<T>(coll1));
        else
            return new HashSet<T>(coll2).equals(new HashSet<T>(coll1));
    }
}