src/main/decaf/util/Queue.h

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/*
 * 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.
 */
#ifndef _DECAF_UTIL_QUEUE_H_
#define _DECAF_UTIL_QUEUE_H_

#include <decaf/util/Config.h>
#include <decaf/util/Iterator.h>
#include <decaf/util/AbstractCollection.h>
#include <decaf/lang/Exception.h>
#include <decaf/lang/exceptions/IndexOutOfBoundsException.h>
#include <decaf/util/NoSuchElementException.h>

namespace decaf{
namespace util{

    template <typename E>
    class Queue : public virtual decaf::util::Collection<E> {
    public:

        virtual ~Queue() {}

        virtual bool offer( const E& value ) = 0;

        virtual bool poll( E& result ) = 0;

        virtual E remove() = 0;

        virtual bool peek( E& result ) const = 0;

        virtual E element() const = 0;

    };

}}

#endif /*_DECAF_UTIL_QUEUE_H_*/