src/main/java/freemarker/core/_SortedArraySet.java

/*
 * 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 freemarker.core;

import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;

/** Don't use this; used internally by FreeMarker, might changes without notice. */
public class _SortedArraySet<E> extends _UnmodifiableSet<E> {

    private final E[] array;

    public _SortedArraySet(E[] array) {
        this.array = array;
    }

    @Override
    public int size() {
        return array.length;
    }

    @Override
    public boolean contains(Object o) {
        return Arrays.binarySearch(array, o) >= 0;
    }

    @Override
    public Iterator<E> iterator() {
        return new _ArrayIterator(array);
    }

    @Override
    public boolean add(E o) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean remove(Object o) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean addAll(Collection<? extends E> c) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean removeAll(Collection<?> c) {
        throw new UnsupportedOperationException();
    }

    @Override
    public boolean retainAll(Collection<?> c) {
        throw new UnsupportedOperationException();
    }

    @Override
    public void clear() {
        throw new UnsupportedOperationException();
    }
    
}