org.ow2.petals.binding.rest.utils.HttpStatusBuilder Maven / Gradle / Ivy

Go to download
/**
 * Copyright (c) 2018-2020 Linagora
 * 
 * This program/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 program/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 program/library; If not, see http://www.gnu.org/licenses/
 * for the GNU Lesser General Public License version 2.1.
 */
package org.ow2.petals.binding.rest.utils;

import org.ow2.petals.component.framework.api.exception.PEtALSCDKException;
import org.w3c.dom.Element;

/**
 * 
 * Build a HTTP code from an XML configuration.
 * 
 * 
 * The HTTP code is expected as an attribute of a XML element.
 * 
 * 
 * @author Christophe DENEUX
 *
 */
public class HttpStatusBuilder {

    private HttpStatusBuilder() {
        // Utility class --> No constructor
    }

    public static int build(final Element ownerElt, final String attrName) throws PEtALSCDKException {
        final String ownerName = ownerElt.getLocalName();
        final String httpCodeStr = ownerElt.getAttribute(attrName);
        if (httpCodeStr == null || httpCodeStr.trim().isEmpty()) {
            throw new PEtALSCDKException(
                    String.format("Attribute '%s' is required on element '%s'", attrName, ownerName));
        } else {
            try {
                return Integer.parseInt(httpCodeStr);
            } catch (final NumberFormatException e) {
                throw new PEtALSCDKException(
                        String.format("The value '%s' of attribute '%s' of element '%s' must be an integer value.",
                                httpCodeStr, attrName, ownerName));
            }
        }
        // TODO: Improve error management when HTTP code is unknown
    }

}