package org.codehaus.modello.plugin.xsd;

import org.codehaus.modello.ModelloException;
import org.codehaus.modello.model.Model;
import org.codehaus.modello.model.Version;
import org.codehaus.modello.plugin.xsd.metadata.XsdModelMetadata;
import org.codehaus.modello.plugins.xml.metadata.XmlModelMetadata;
import org.codehaus.plexus.util.StringUtils;

/*
 * Copyright (c) 2004, Codehaus.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/**
 * Helper methods to deal with XML schema representation of the model.
 *
 * @author <a href="mailto:hboutemy@codehaus.org">Hervé Boutemy</a>
 */
public class XsdModelHelper {
    public static String getNamespace(Model model, Version version) throws ModelloException {
        XmlModelMetadata xmlModelMetadata = (XmlModelMetadata) model.getMetadata(XmlModelMetadata.ID);

        XsdModelMetadata xsdModelMetadata = (XsdModelMetadata) model.getMetadata(XsdModelMetadata.ID);

        String namespace;
        if (StringUtils.isNotEmpty(xsdModelMetadata.getNamespace())) {
            namespace = xsdModelMetadata.getNamespace(version);
        } else {
            // xsd.namespace is not set, try using xml.namespace
            if (StringUtils.isEmpty(xmlModelMetadata.getNamespace())) {
                throw new ModelloException("Cannot generate xsd without xmlns specification:"
                        + " <model xml.namespace='...'> or <model xsd.namespace='...'>");
            }

            namespace = xmlModelMetadata.getNamespace(version);
        }

        return namespace;
    }

    public static String getTargetNamespace(Model model, Version version, String namespace) {
        XsdModelMetadata xsdModelMetadata = (XsdModelMetadata) model.getMetadata(XsdModelMetadata.ID);

        String targetNamespace;
        if (xsdModelMetadata.getTargetNamespace() == null) {
            // xsd.targetNamespace not set, using namespace
            targetNamespace = namespace;
        } else {
            targetNamespace = xsdModelMetadata.getTargetNamespace(version);
        }
        return targetNamespace;
    }

    public static String getTargetNamespace(Model model, Version version) throws ModelloException {
        return getTargetNamespace(model, version, getNamespace(model, version));
    }
}
