/*
    * Portions of this software was developed by employees of the National Institute
    * of Standards and Technology (NIST), an agency of the Federal Government and is
    * being made available as a public service. Pursuant to title 17 United States
    * Code Section 105, works of NIST employees are not subject to copyright
    * protection in the United States. This software may be subject to foreign
    * copyright. Permission in the United States and in foreign countries, to the
    * extent that NIST may hold copyright, to use, copy, modify, create derivative
    * works, and distribute this software and its documentation without fee is hereby
   * granted on a non-exclusive basis, provided that this notice and disclaimer
   * of warranty appears in all copies.
   *
   * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
   * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
   * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
   * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
   * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE.  IN NO EVENT
   * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
   * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
   * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
   * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
   * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
   * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
   */
  
  package gov.nist.secauto.metaschema.schemagen.xml.datatype;
  
  import org.jdom2.Document;
  import org.jdom2.Element;
  import org.jdom2.JDOMException;
  import org.jdom2.Namespace;
  import org.jdom2.filter.Filters;
  import org.jdom2.input.SAXBuilder;
  import org.jdom2.xpath.XPathExpression;
  import org.jdom2.xpath.XPathFactory;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.file.Path;
  import java.util.Collection;
  import java.util.List;
  import java.util.Map;
  import java.util.stream.Collectors;
  
  import edu.umd.cs.findbugs.annotations.NonNull;
  import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  
  public class JDom2XmlSchemaLoader {
    @NonNull
    public static final String NS_XML_SCHEMA = "http://www.w3.org/2001/XMLSchema";
  
    @NonNull
    private final Document document;
  
    @SuppressWarnings("null")
    public JDom2XmlSchemaLoader(@NonNull Path path) throws JDOMException, IOException {
      this(new SAXBuilder().build(path.toFile()));
    }
  
    @SuppressWarnings("null")
    public JDom2XmlSchemaLoader(@NonNull InputStream is) throws JDOMException, IOException {
      this(new SAXBuilder().build(is));
    }
  
    @SuppressFBWarnings("EI_EXPOSE_REP2")
    public JDom2XmlSchemaLoader(@NonNull Document document) {
      this.document = document;
    }
  
    protected Document getNode() {
      return document;
    }
  
    @SuppressWarnings("null")
    @NonNull
    public List<Element> getContent(
        @NonNull String path,
        @NonNull Map<String, String> prefixToNamespaceMap) {
  
      Collection<Namespace> namespaces = prefixToNamespaceMap.entrySet().stream()
          .map(entry -> Namespace.getNamespace(entry.getKey(), entry.getValue()))
          .collect(Collectors.toList());
      XPathExpression<Element> xpath = XPathFactory.instance().compile(path, Filters.element(), null, namespaces);
      return xpath.evaluate(getNode());
    }
  }