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Open source reference implementation of SDMX
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/*******************************************************************************
 * Copyright (c) 2013 Metadata Technology Ltd.
 *
 * All rights reserved. This program and the accompanying materials are made
 * available under the terms of the GNU Lesser General Public License v 3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl.html
 *
 * This file is part of the SDMX Component Library.
 *
 * The SDMX Component Library is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 *
 * The SDMX Component Library 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 Lesser
 * General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with The SDMX Component Library If not, see
 * http://www.gnu.org/licenses/lgpl.
 *
 * Contributors:
 * Metadata Technology - initial API and implementation
 ******************************************************************************/
package org.sdmxsource.sdmx.querybuilder.manager;

import org.sdmxsource.sdmx.api.builder.StructureQueryBuilder;
import org.sdmxsource.sdmx.api.exception.SdmxUnauthorisedException;
import org.sdmxsource.sdmx.api.factory.StructureQueryFactory;
import org.sdmxsource.sdmx.api.manager.query.StructureQueryBuilderManager;
import org.sdmxsource.sdmx.api.model.format.StructureQueryFormat;
import org.sdmxsource.sdmx.api.model.query.RESTStructureQuery;
import org.sdmxsource.sdmx.querybuilder.factory.RestStructureQueryFactory;

/**
 * The type Structure query builder manager.
 */
public class StructureQueryBuilderManagerImpl implements StructureQueryBuilderManager {

    private final StructureQueryFactory[] factories;

    /**
     * Instantiates a new Structure query builder manager.
     *
     * @param factories the factories
     */
    public StructureQueryBuilderManagerImpl(final StructureQueryFactory[] factories) {
        if (factories == null || factories.length == 0) {
            this.factories = new StructureQueryFactory[]{new RestStructureQueryFactory()};
        } else {
            this.factories = factories;
        }
    }

    @Override
    public  T buildStructureQuery(RESTStructureQuery structureQuery, StructureQueryFormat structureQueryFormat) {
        for (StructureQueryFactory currentFactory : factories) {
            StructureQueryBuilder builder = currentFactory.getStructureQueryBuilder(structureQueryFormat);
            if (builder != null) {
                return builder.buildStructureQuery(structureQuery);
            }
        }
        throw new SdmxUnauthorisedException("Unsupported StructureQueryFormat: " + structureQueryFormat);
    }
}