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));
      }
  }