/**
 * Copyright 2011 (c) 10gen Inc.
 *
 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * As a special exception, the copyright holders give permission to link the
 * code of portions of this program with the OpenSSL library under certain
 * conditions as described in each individual source file and distribute
 * linked combinations including the program with the OpenSSL library. You
 * must comply with the GNU Affero General Public License in all respects for
 * all of the code used other than as permitted herein. If you modify file(s)
 * with this exception, you may extend this exception to your version of the
 * file(s), but you are not obligated to do so. If you do not wish to do so,
 * delete this exception statement from your version. If you delete this
 * exception statement from all source files in the program, then also delete
 * it in the license file.
 */

#include "mongo/pch.h"

#include "mongo/db/pipeline/document.h"
#include "mongo/db/pipeline/document_source.h"


namespace mongo {

    boost::optional<Document> DocumentSourceBsonArray::getNext() {
        pExpCtx->checkForInterrupt();

        if (!arrayIterator.more())
            return boost::none;

        return Document(arrayIterator.next().Obj());
    }

    void DocumentSourceBsonArray::setSource(DocumentSource *pSource) {
        /* this doesn't take a source */
        verify(false);
    }

    DocumentSourceBsonArray::DocumentSourceBsonArray(
            const BSONObj& array,
            const intrusive_ptr<ExpressionContext> &pExpCtx)
        : DocumentSource(pExpCtx)
        , embeddedObject(array)
        , arrayIterator(embeddedObject)
    {}

    intrusive_ptr<DocumentSourceBsonArray> DocumentSourceBsonArray::create(
            const BSONObj& array,
            const intrusive_ptr<ExpressionContext> &pExpCtx) {

        return new DocumentSourceBsonArray(array, pExpCtx);
    }

    Value DocumentSourceBsonArray::serialize(bool explain) const {
        if (explain) {
            return Value(DOC("bsonArray" << Document()));
        }
        return Value();
    }
}
