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/*
 * Copyright 2007-2008 the original author or authors.
 *
 * 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.
 */
package org.gradle.util;

import org.gradle.api.DomainObjectSet;
import org.gradle.api.internal.CollectionCallbackActionDecorator;
import org.gradle.api.internal.DefaultDomainObjectSet;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;

/**
 * Common methods to wrap objects in generic collections.
 */
public class WrapUtil {
    /**
     * Wraps the given items in a mutable unordered set.
     */
    @SafeVarargs
    @SuppressWarnings("varargs")
    public static  Set toSet(T... items) {
        Set coll = new HashSet();
        Collections.addAll(coll, items);
        return coll;
    }

    /**
     * Wraps the given items in a mutable domain object set.
     */
    @SafeVarargs
    @SuppressWarnings("varargs")
    public static  DomainObjectSet toDomainObjectSet(Class type, T... items) {
        DefaultDomainObjectSet set = new DefaultDomainObjectSet(type, CollectionCallbackActionDecorator.NOOP);
        set.addAll(Arrays.asList(items));
        return set;
    }

    /**
     * Wraps the given items in a mutable ordered set.
     */
    @SafeVarargs
    @SuppressWarnings("varargs")
    public static  Set toLinkedSet(T... items) {
        Set coll = new LinkedHashSet();
        Collections.addAll(coll, items);
        return coll;
    }

    /**
     * Wraps the given items in a mutable sorted set.
     */
    @SafeVarargs
    @SuppressWarnings("varargs")
    public static  SortedSet toSortedSet(T... items) {
        SortedSet coll = new TreeSet();
        Collections.addAll(coll, items);
        return coll;
    }

    /**
     * Wraps the given items in a mutable sorted set using the given comparator.
     */
    @SafeVarargs
    @SuppressWarnings("varargs")
    public static  SortedSet toSortedSet(Comparator comp, T... items) {
        SortedSet coll = new TreeSet(comp);
        Collections.addAll(coll, items);
        return coll;
    }

    /**
     * Wraps the given items in a mutable list.
     */
    @SafeVarargs
    @SuppressWarnings("varargs")
    public static  List toList(T... items) {
        ArrayList coll = new ArrayList();
        Collections.addAll(coll, items);
        return coll;
    }

    /**
     * Wraps the given items in a mutable list.
     */
    public static  List toList(Iterable items) {
        ArrayList coll = new ArrayList();
        for (T item : items) {
            coll.add(item);
        }
        return coll;
    }

    /**
     * Wraps the given key and value in a mutable unordered map.
     */
    public static  Map toMap(K key, V value) {
        Map map = new HashMap();
        map.put(key, value);
        return map;
    }

    @SafeVarargs
    @SuppressWarnings("varargs")
    public static  T[] toArray(T... items) {
        return items;
    }

}