[basex-talk] 'replace node' with new XML namespace prefix

2 Nov 2011

      Hi. I've found a strange behaviour with the xquery "replace node" command. It seems that new namespace declarations within the XML tree added are not taken into account. Please, find hereafter a JUnit test code.

Laurent

package com.cyim.basex.test.ns;

import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import org.basex.server.ClientSession;
import org.basex.util.Util;

/**
 * Test support of XML namespaces. 
 * 
 * @author Laurent Chevalier l.chevalier@cyim.com
 */
public final class NamespaceTest {
  /** Client session. */
  private ClientSession session;

  /** Database name. */
  protected static final String DB = Util.name(NamespaceTest.class);

  /**
   * Opens a client session, creates a database and loads documents.
   * @throws java.io.IOException IO exception
   */
  @Before
  public void setUp() throws java.io.IOException {
    session = new ClientSession("localhost", 1984, "admin", "admin");
    session.execute(String.format("create db %s <default/>", DB));

    // Loads documents.
    addDoc("doc/1");
    addDoc("doc/2");
    addDoc("doc/3");
  }

  /**
   * Adds a document.
   * @param uri
   * @throws java.io.IOException
   */
  private void addDoc(String uri) throws java.io.IOException {
    // Document content.
    java.lang.StringBuilder qs = new java.lang.StringBuilder();
    qs.append("<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:core=\"http://rdfs.cyim.com/CoreContent#\">\n");
    qs.append(String.format("  <core:Container rdf:about=\"%s\"/>\n", uri));
    qs.append("</rdf:RDF>");

    // Adds it.
    java.io.InputStream in = new java.io.ByteArrayInputStream(qs.toString().getBytes("UTF-8"));
    try { session.add(uri, in); } finally { in.close(); }
  }

  /**
   * Drops the database and close remaining client sessions.
   * @throws java.io.IOException IO exception
   */
  @After
  public void tearDown() throws java.io.IOException {
    session.execute("drop db " + DB);
    session.close();
  }  

  /**
   * Inserts a node.
   * 
   * @param uri Document uri. 
   * @throws java.io.IOException IO exception
   */
  private void insertNode(String uri) throws java.io.IOException {
    java.lang.StringBuilder qs = new java.lang.StringBuilder("xquery\n");
    qs.append("declare namespace rdf = \"http://www.w3.org/1999/02/22-rdf-syntax-ns#\";\n");
    qs.append("declare namespace core = \"http://rdfs.cyim.com/CoreContent#\";\n");
    qs.append("declare namespace wfdata = \"http://rdfs.cyim.com/WorkflowData#\";\n");
    qs.append("insert node ")
    .append("<wfdata:Workflow xmlns:wfdata=\"http://rdfs.cyim.com/WorkflowData#\">\n")
    .append("  <wfdata:raiseOn>2011-11-01T11:34:08Z</wfdata:raiseOn>\n")
    .append("</wfdata:Workflow>\n")
    .append("into /rdf:RDF/*[@rdf:about=\"" + uri + "\"] ");
    session.execute(qs.toString());
  }

  /**
   * Replaces a node and declares the 'wfdata' prefix on the 'core:Container' node.
   * 
   * @param uri Document uri. 
   * @throws java.io.IOException IO exception
   */
  private void replaceNode(String uri) throws java.io.IOException {
    java.lang.StringBuilder qs = new java.lang.StringBuilder("xquery\n");
    qs.append("declare namespace rdf = \"http://www.w3.org/1999/02/22-rdf-syntax-ns#\";\n");
    qs.append("declare namespace core = \"http://rdfs.cyim.com/CoreContent#\";\n");
    qs.append("declare namespace wfdata = \"http://rdfs.cyim.com/WorkflowData#\";\n");
    qs.append("replace node /rdf:RDF/*[@rdf:about=\"" + uri + "\"] with <core:Container rdf:about=\"" + uri + "\" xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:core=\"http://rdfs.cyim.com/CoreContent#\" xmlns:wfdata=\"http://rdfs.cyim.com/WorkflowData#\">\n")
      .append("  <wfdata:Workflow>\n")
      .append("    <wfdata:raiseOn>2011-11-01T11:34:08Z</wfdata:raiseOn>\n")
      .append("  </wfdata:Workflow>\n")
      .append("</core:Container>\n");
    session.execute(qs.toString());
  }

  /**
   * Replaces a node and declares the 'wfdata' prefix on the 'wfdata:Workflow' node.
   * 
   * @param uri Document uri. 
   * @throws java.io.IOException IO exception
   */
  private void replaceNode2(String uri) throws java.io.IOException {
    java.lang.StringBuilder qs = new java.lang.StringBuilder("xquery\n");
    qs.append("declare namespace rdf = \"http://www.w3.org/1999/02/22-rdf-syntax-ns#\";\n");
    qs.append("declare namespace core = \"http://rdfs.cyim.com/CoreContent#\";\n");
    qs.append("declare namespace wfdata = \"http://rdfs.cyim.com/WorkflowData#\";\n");
    qs.append("replace node /rdf:RDF/*[@rdf:about=\"" + uri + "\"] with <core:Container rdf:about=\"" + uri + "\" xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:core=\"http://rdfs.cyim.com/CoreContent#\">\n")
      .append("  <wfdata:Workflow xmlns:wfdata=\"http://rdfs.cyim.com/WorkflowData#\">\n")
      .append("    <wfdata:raiseOn>2011-11-01T11:34:08Z</wfdata:raiseOn>\n")
      .append("  </wfdata:Workflow>\n")
      .append("</core:Container>\n");
    session.execute(qs.toString());
  }

  /**
   * Query. Select depending on added node.
   * 
   * @param expected Number of expected results.
   * @throws java.io.IOException IO exception
   */
  private void query(int expected) throws java.io.IOException {
    // Query using wildcards.
    java.lang.StringBuilder qs = new java.lang.StringBuilder("xquery\n");
    qs.append("declare namespace rdf = \"http://www.w3.org/1999/02/22-rdf-syntax-ns#\";\n");
    qs.append("for $c in /rdf:RDF/*[//*:raiseOn<\"2011-11-02T14:19:07Z\"]\n");
    qs.append("return <item about=\"{data($c/@rdf:about)}\" raiseOn=\"{data($c//*:raiseOn)}\"/>\n");
    String results = session.execute(qs.toString());
    System.out.println("\n" + qs.toString() + "\n" + results);
    Assert.assertEquals("Missing results!", expected, results.isEmpty()?0:results.split("\r\n|\r|\n").length);

    // Query using namespace.
    qs = new java.lang.StringBuilder("xquery\n");
    qs.append("declare namespace rdf = \"http://www.w3.org/1999/02/22-rdf-syntax-ns#\";\n");
    qs.append("declare namespace wfdata = \"http://rdfs.cyim.com/WorkflowData#\";\n");
    qs.append("for $c in /rdf:RDF/*[//wfdata:raiseOn<\"2011-11-02T14:19:07Z\"]\n");
    qs.append("return <item about=\"{data($c/@rdf:about)}\" raiseOn=\"{data($c//wfdata:raiseOn)}\"/>\n");
    results = session.execute(qs.toString());
    System.out.println("\n" + qs.toString() + "\n" + results);
    Assert.assertEquals("Missing results!", expected, results.isEmpty()?0:results.split("\r\n|\r|\n").length);
  }

  /**
   * Test entry point.
   * @throws java.io.IOException IO exception
   */
  @Test
  public void run() throws java.io.IOException {
    System.out.println("Query using unchanged documents.");
    query(0);

    System.out.println("\nInserts a node to doc/1.");
    insertNode("doc/1");

    System.out.println("\nQuery. Should get 1 document.");
    query(1);

    System.out.println("\nReplaces a node in doc/2 and declares the 'wfdata' prefix on the 'core:Container' node.\n.");
    replaceNode("doc/2");

    System.out.println("\nQuery. Should get 2 documents.");
    query(2);

    System.out.println("\nReplaces a node in doc/3 and declares the 'wfdata' prefix on the 'wfdata:Workflow' node.\n.");
    replaceNode2("doc/3");

    System.out.println("\nDatabase content:");
    System.out.println(session.execute("xquery /"));

    System.out.println("\nQuery. Should get 3 documents.");
    System.out.println("This test is going to fail without wildcards as if the new node linked to 'wfdata' prefix was not seen.");
    query(3);
  }
}