net.sf.sail.webapp.dao.sds.impl.SdsCurnitMapGetter.java Source code

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Here is the source code for net.sf.sail.webapp.dao.sds.impl.SdsCurnitMapGetter.java

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/**
 * Copyright (c) 2007 Encore Research Group, University of Toronto
 * 
 * This 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 2.1 of the License, or (at your option) any later version.
 *
 * This 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package net.sf.sail.webapp.dao.sds.impl;

import java.io.InputStream;

import net.sf.sail.webapp.dao.sds.CurnitMapNotFoundException;
import net.sf.sail.webapp.domain.sds.SdsOffering;
import net.sf.sail.webapp.domain.webservice.http.impl.HttpGetCurnitMapRequest;

import org.apache.commons.httpclient.HttpStatus;

/**
 * A utility class which allows us to retrieve a curnitmap from the sds. Not a
 * full fledged sdsCommand, but is required to be associated with an offering
 * GET command.
 * 
 * @author Laurel Williams
 * 
 * @version $Id$
 */
public class SdsCurnitMapGetter {

    AbstractHttpRestCommand command;

    public SdsCurnitMapGetter(AbstractHttpRestCommand command) {
        super();
        this.command = command;
    }

    /**
     * A method which allows a command to pass in an sdsOffering and to have
     * it's curnitmap set via an sds retrieval.
     * 
     * @param sdsOffering
     *            The offering to which we want to add the sdscurnit.
     * @throws CurnitMapNotFoundException
     *             If the curnitmap cannot be retrieved for any reason. A side
     *             effect of throwing this exception is that the sdsCurnitMap
     *             field of the sdsOffering is set to a blank string and the
     *             offering is stored in the exception so that it can be
     *             retrieved later.
     * 
     */
    protected void setSdsOfferingCurnitMap(SdsOffering sdsOffering) throws CurnitMapNotFoundException {
        HttpGetCurnitMapRequest curnitMapRequest = this.generateCurnitMapRequest(sdsOffering);
        try {
            sdsOffering.setSdsCurnitMap(this.getSdsCurnitMap(curnitMapRequest));
        } catch (CurnitMapNotFoundException cmnfe) {
            sdsOffering.setSdsCurnitMap("");
            cmnfe.setSdsOffering(sdsOffering);
            throw cmnfe;
        }
    }

    private String getSdsCurnitMap(HttpGetCurnitMapRequest curnitMapRequest) throws CurnitMapNotFoundException {
        InputStream curnitMapResponse = command.transport.get(curnitMapRequest);
        return AbstractHttpRestCommand.convertXMLInputStreamToString(curnitMapResponse);
    }

    private HttpGetCurnitMapRequest generateCurnitMapRequest(SdsOffering sdsOffering) {
        final String url;
        if (sdsOffering.getRetrieveContentUrl() != null) {
            url = "/offering/" + sdsOffering.getSdsObjectId() + "/curnitmap" + "?sailotrunk.otmlurl="
                    + sdsOffering.getRetrieveContentUrl();
        } else {
            url = "/offering/" + sdsOffering.getSdsObjectId() + "/curnitmap";
        }

        return new HttpGetCurnitMapRequest(AbstractHttpRestCommand.REQUEST_HEADERS_ACCEPT,
                AbstractHttpRestCommand.EMPTY_STRING_MAP, url, HttpStatus.SC_OK);
    }

}