/*
 * Copyright (C) 2009 The Guava 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 com.google.common.collect;

/**
 * "Overrides" the {@link ImmutableSet} static methods that lack
 * {@link ImmutableSortedSet} equivalents with deprecated, exception-throwing
 * versions. This prevents accidents like the following:
 * 
 * <pre>
 *    {@code
 *
 *   List<Object> objects = ...;
 *   // Sort them:
 *   Set<Object> sorted = ImmutableSortedSet.copyOf(objects);
 *   // BAD CODE! The returned set is actually an unsorted ImmutableSet!}
 * </pre>
 *
 * <p>
 * While we could put the overrides in {@link ImmutableSortedSet} itself, it
 * seems clearer to separate these "do not call" methods from those intended for
 * normal use.
 *
 * @author Chris Povirk
 */
abstract class ImmutableSortedSetFauxverideShim<E> extends ImmutableSet<E> {
	/**
	 * Not supported. Use {@link ImmutableSortedSet#naturalOrder}, which offers
	 * better type-safety, instead. This method exists only to hide
	 * {@link ImmutableSet#builder} from consumers of {@code ImmutableSortedSet}.
	 *
	 * @throws UnsupportedOperationException always
	 * @deprecated Use {@link ImmutableSortedSet#naturalOrder}, which offers better
	 *             type-safety.
	 */
	@Deprecated
	public static <E> ImmutableSortedSet.Builder<E> builder() {
		throw new UnsupportedOperationException();
	}

	/**
	 * Not supported. <b>You are attempting to create a set that may contain a
	 * non-{@code Comparable} element.</b> Proper calls will resolve to the version
	 * in {@code ImmutableSortedSet}, not this dummy version.
	 *
	 * @throws UnsupportedOperationException always
	 * @deprecated <b>Pass a parameter of type {@code Comparable} to use
	 *             {@link ImmutableSortedSet#of(Comparable)}.</b>
	 */
	@Deprecated
	public static <E> ImmutableSortedSet<E> of(E element) {
		throw new UnsupportedOperationException();
	}

	/**
	 * Not supported. <b>You are attempting to create a set that may contain a
	 * non-{@code Comparable} element.</b> Proper calls will resolve to the version
	 * in {@code ImmutableSortedSet}, not this dummy version.
	 *
	 * @throws UnsupportedOperationException always
	 * @deprecated <b>Pass the parameters of type {@code Comparable} to use
	 *             {@link ImmutableSortedSet#of(Comparable, Comparable)}.</b>
	 */
	@Deprecated
	public static <E> ImmutableSortedSet<E> of(E e1, E e2) {
		throw new UnsupportedOperationException();
	}

	/**
	 * Not supported. <b>You are attempting to create a set that may contain a
	 * non-{@code Comparable} element.</b> Proper calls will resolve to the version
	 * in {@code ImmutableSortedSet}, not this dummy version.
	 *
	 * @throws UnsupportedOperationException always
	 * @deprecated <b>Pass the parameters of type {@code Comparable} to use
	 *             {@link ImmutableSortedSet#of(Comparable, Comparable, Comparable)}.</b>
	 */
	@Deprecated
	public static <E> ImmutableSortedSet<E> of(E e1, E e2, E e3) {
		throw new UnsupportedOperationException();
	}

	/**
	 * Not supported. <b>You are attempting to create a set that may contain a
	 * non-{@code Comparable} element.</b> Proper calls will resolve to the version
	 * in {@code ImmutableSortedSet}, not this dummy version.
	 *
	 * @throws UnsupportedOperationException always
	 * @deprecated <b>Pass the parameters of type {@code Comparable} to use
	 *             {@link ImmutableSortedSet#of(Comparable, Comparable, Comparable, Comparable)}.
	 *             </b>
	 */
	@Deprecated
	public static <E> ImmutableSortedSet<E> of(E e1, E e2, E e3, E e4) {
		throw new UnsupportedOperationException();
	}

	/**
	 * Not supported. <b>You are attempting to create a set that may contain a
	 * non-{@code Comparable} element.</b> Proper calls will resolve to the version
	 * in {@code ImmutableSortedSet}, not this dummy version.
	 *
	 * @throws UnsupportedOperationException always
	 * @deprecated <b>Pass the parameters of type {@code Comparable} to use
	 *             {@link ImmutableSortedSet#of( Comparable, Comparable, Comparable, Comparable, Comparable)}.
	 *             </b>
	 */
	@Deprecated
	public static <E> ImmutableSortedSet<E> of(E e1, E e2, E e3, E e4, E e5) {
		throw new UnsupportedOperationException();
	}

	/**
	 * Not supported. <b>You are attempting to create a set that may contain a
	 * non-{@code Comparable} element.</b> Proper calls will resolve to the version
	 * in {@code ImmutableSortedSet}, not this dummy version.
	 *
	 * @throws UnsupportedOperationException always
	 * @deprecated <b>Pass the parameters of type {@code Comparable} to use
	 *             {@link ImmutableSortedSet#of(Comparable, Comparable, Comparable, Comparable, Comparable, Comparable, Comparable...)}.
	 *             </b>
	 */
	@Deprecated
	public static <E> ImmutableSortedSet<E> of(E e1, E e2, E e3, E e4, E e5, E e6, E... remaining) {
		throw new UnsupportedOperationException();
	}

	/**
	 * Not supported. <b>You are attempting to create a set that may contain
	 * non-{@code Comparable} elements.</b> Proper calls will resolve to the version
	 * in {@code ImmutableSortedSet}, not this dummy version.
	 *
	 * @throws UnsupportedOperationException always
	 * @deprecated <b>Pass parameters of type {@code Comparable} to use
	 *             {@link ImmutableSortedSet#copyOf(Comparable[])}.</b>
	 */
	@Deprecated
	public static <E> ImmutableSortedSet<E> copyOf(E[] elements) {
		throw new UnsupportedOperationException();
	}

	/*
	 * We would like to include an unsupported "<E> copyOf(Iterable<E>)" here,
	 * providing only the properly typed
	 * "<E extends Comparable<E>> copyOf(Iterable<E>)" in ImmutableSortedSet (and
	 * likewise for the Iterator equivalent). However, due to a change in Sun's
	 * interpretation of the JLS (as described at
	 * http://bugs.sun.com/view_bug.do?bug_id=6182950), the OpenJDK 7 compiler
	 * available as of this writing rejects our attempts. To maintain compatibility
	 * with that version and with any other compilers that interpret the JLS
	 * similarly, there is no definition of copyOf() here, and the definition in
	 * ImmutableSortedSet matches that in ImmutableSet.
	 * 
	 * The result is that ImmutableSortedSet.copyOf() may be called on
	 * non-Comparable elements. We have not discovered a better solution. In
	 * retrospect, the static factory methods should have gone in a separate class
	 * so that ImmutableSortedSet wouldn't "inherit" too-permissive factory methods
	 * from ImmutableSet.
	 */
}
