gov.nih.nci.caintegrator.application.study.ExternalLinksLoader.java Source code

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Here is the source code for gov.nih.nci.caintegrator.application.study.ExternalLinksLoader.java

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/**
 * Copyright 5AM Solutions Inc, ESAC, ScenPro & SAIC
 *
 * Distributed under the OSI-approved BSD 3-Clause License.
 * See http://ncip.github.com/caintegrator/LICENSE.txt for details.
 */
package gov.nih.nci.caintegrator.application.study;

import java.io.FileReader;
import java.io.IOException;

import org.apache.commons.io.IOUtils;

import au.com.bytecode.opencsv.CSVReader;

/**
 * Helper class used to load the ExternalLinkList object.
 */
final class ExternalLinksLoader {

    private ExternalLinksLoader() {
    }

    static void loadLinks(ExternalLinkList externalLinkList) throws ValidationException, IOException {
        CSVReader reader = new CSVReader(new FileReader(externalLinkList.getFile()));
        try {
            loadLinks(externalLinkList, reader);
        } finally {
            IOUtils.closeQuietly(reader);
        }
    }

    private static void loadLinks(ExternalLinkList externalLinkList, CSVReader reader)
            throws IOException, ValidationException {
        String[] values;
        while ((values = reader.readNext()) != null) {
            if (values.length != 3) {
                throw new ValidationException("Invalid file format - Expect 3 columns but has " + values.length);
            }
            ExternalLink link = new ExternalLink();
            link.setCategory(values[0]);
            link.setName(values[1]);
            link.setUrl(values[2]);
            if (!link.getUrl().startsWith("http")) {
                throw new ValidationException("Invalid File Format - CSV must be of format "
                        + "'category','link_name','link_url' and URL must start with 'http'");
            }
            externalLinkList.getExternalLinks().add(link);
        }
    }
}