catalog.java

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      if (e.getEntryType() == PUBLIC
	  && e.getEntryArg(0).equals(publicId)) {
	if (over || systemId == null) {
	  return e.getEntryArg(1);
	}
      }
    }

    // If there's a DELEGATE_PUBLIC entry in this catalog, use it
    over = default_override;
    en = catalogEntries.elements();
    Vector delCats = new Vector();
    while (en.hasMoreElements()) {
      CatalogEntry e = (CatalogEntry) en.nextElement();
      if (e.getEntryType() == OVERRIDE) {
	over = e.getEntryArg(0).equalsIgnoreCase("YES");
	continue;
      }

      if (e.getEntryType() == DELEGATE_PUBLIC
	  && (over || systemId == null)) {
	String p = (String) e.getEntryArg(0);
	if (p.length() <= publicId.length()
	    && p.equals(publicId.substring(0, p.length()))) {
	  // delegate this match to the other catalog

	  delCats.addElement(e.getEntryArg(1));
	}
      }
    }

    if (delCats.size() > 0) {
      Enumeration enCats = delCats.elements();

      if (catalogManager.debug.getDebug() > 1) {
	catalogManager.debug.message(2, "Switching to delegated catalog(s):");
	while (enCats.hasMoreElements()) {
	  String delegatedCatalog = (String) enCats.nextElement();
	  catalogManager.debug.message(2, "\t" + delegatedCatalog);
	}
      }

      Catalog dcat = newCatalog();

      enCats = delCats.elements();
      while (enCats.hasMoreElements()) {
	String delegatedCatalog = (String) enCats.nextElement();
	dcat.parseCatalog(delegatedCatalog);
      }

      return dcat.resolvePublic(publicId, null);
    }

    // Nada!
    return null;
  }

  /**
   * Return the applicable SYSTEM system identifier.
   *
   * <p>If a SYSTEM entry exists in the Catalog
   * for the system ID specified, return the mapped value.</p>
   *
   * <p>On Windows-based operating systems, the comparison between
   * the system identifier provided and the SYSTEM entries in the
   * Catalog is case-insensitive.</p>
   *
   * @param systemId The system ID to locate in the catalog.
   *
   * @return The resolved system identifier.
   *
   * @throws MalformedURLException The formal system identifier of a
   * subordinate catalog cannot be turned into a valid URL.
   * @throws IOException Error reading subordinate catalog file.
   */
  public String resolveSystem(String systemId)
    throws MalformedURLException, IOException {

    catalogManager.debug.message(3, "resolveSystem("+systemId+")");

    systemId = normalizeURI(systemId);

    if (systemId != null && systemId.startsWith("urn:publicid:")) {
      systemId = PublicId.decodeURN(systemId);
      return resolvePublic(systemId, null);
    }

    // If there's a SYSTEM entry in this catalog, use it
    if (systemId != null) {
      String resolved = resolveLocalSystem(systemId);
      if (resolved != null) {
	return resolved;
      }
    }

    // Otherwise, look in the subordinate catalogs
    return resolveSubordinateCatalogs(SYSTEM,
				      null,
				      null,
				      systemId);
  }

  /**
   * Return the applicable SYSTEM system identifier in this
   * catalog.
   *
   * <p>If a SYSTEM entry exists in the catalog file
   * for the system ID specified, return the mapped value.</p>
   *
   * @param systemId The system ID to locate in the catalog
   *
   * @return The mapped system identifier or null
   */
  protected String resolveLocalSystem(String systemId)
    throws MalformedURLException, IOException {

    String osname = System.getProperty("os.name");
    boolean windows = (osname.indexOf("Windows") >= 0);
    Enumeration en = catalogEntries.elements();
    while (en.hasMoreElements()) {
      CatalogEntry e = (CatalogEntry) en.nextElement();
      if (e.getEntryType() == SYSTEM
	  && (e.getEntryArg(0).equals(systemId)
	      || (windows
		  && e.getEntryArg(0).equalsIgnoreCase(systemId)))) {
	return e.getEntryArg(1);
      }
    }

    // If there's a REWRITE_SYSTEM entry in this catalog, use it
    en = catalogEntries.elements();
    String startString = null;
    String prefix = null;
    while (en.hasMoreElements()) {
      CatalogEntry e = (CatalogEntry) en.nextElement();

      if (e.getEntryType() == REWRITE_SYSTEM) {
	String p = (String) e.getEntryArg(0);
	if (p.length() <= systemId.length()
	    && p.equals(systemId.substring(0, p.length()))) {
	  // Is this the longest prefix?
	  if (startString == null
	      || p.length() > startString.length()) {
	    startString = p;
	    prefix = e.getEntryArg(1);
	  }
	}
      }
    }

    if (prefix != null) {
      // return the systemId with the new prefix
      return prefix + systemId.substring(startString.length());
    }

    // If there's a SYSTEM_SUFFIX entry in this catalog, use it
    en = catalogEntries.elements();
    String suffixString = null;
    String suffixURI = null;
    while (en.hasMoreElements()) {
      CatalogEntry e = (CatalogEntry) en.nextElement();

      if (e.getEntryType() == SYSTEM_SUFFIX) {
	String p = (String) e.getEntryArg(0);
	if (p.length() <= systemId.length()
	    && systemId.endsWith(p)) {
	  // Is this the longest prefix?
	  if (suffixString == null
	      || p.length() > suffixString.length()) {
	    suffixString = p;
	    suffixURI = e.getEntryArg(1);
	  }
	}
      }
    }

    if (suffixURI != null) {
      // return the systemId for the suffix
      return suffixURI;
    }

    // If there's a DELEGATE_SYSTEM entry in this catalog, use it
    en = catalogEntries.elements();
    Vector delCats = new Vector();
    while (en.hasMoreElements()) {
      CatalogEntry e = (CatalogEntry) en.nextElement();

      if (e.getEntryType() == DELEGATE_SYSTEM) {
	String p = (String) e.getEntryArg(0);
	if (p.length() <= systemId.length()
	    && p.equals(systemId.substring(0, p.length()))) {
	  // delegate this match to the other catalog

	  delCats.addElement(e.getEntryArg(1));
	}
      }
    }

    if (delCats.size() > 0) {
      Enumeration enCats = delCats.elements();

      if (catalogManager.debug.getDebug() > 1) {
	catalogManager.debug.message(2, "Switching to delegated catalog(s):");
	while (enCats.hasMoreElements()) {
	  String delegatedCatalog = (String) enCats.nextElement();
	  catalogManager.debug.message(2, "\t" + delegatedCatalog);
	}
      }

      Catalog dcat = newCatalog();

      enCats = delCats.elements();
      while (enCats.hasMoreElements()) {
	String delegatedCatalog = (String) enCats.nextElement();
	dcat.parseCatalog(delegatedCatalog);
      }

      return dcat.resolveSystem(systemId);
    }

    return null;
  }

  /**
   * Return the applicable URI.
   *
   * <p>If a URI entry exists in the Catalog
   * for the URI specified, return the mapped value.</p>
   *
   * <p>URI comparison is case sensitive.</p>
   *
   * @param uri The URI to locate in the catalog.
   *
   * @return The resolved URI.
   *
   * @throws MalformedURLException The system identifier of a
   * subordinate catalog cannot be turned into a valid URL.
   * @throws IOException Error reading subordinate catalog file.
   */
  public String resolveURI(String uri)
    throws MalformedURLException, IOException {

    catalogManager.debug.message(3, "resolveURI("+uri+")");

    uri = normalizeURI(uri);

    if (uri != null && uri.startsWith("urn:publicid:")) {
      uri = PublicId.decodeURN(uri);
      return resolvePublic(uri, null);
    }

    // If there's a URI entry in this catalog, use it
    if (uri != null) {
      String resolved = resolveLocalURI(uri);
      if (resolved != null) {
	return resolved;
      }
    }

    // Otherwise, look in the subordinate catalogs
    return resolveSubordinateCatalogs(URI,
				      null,
				      null,
				      uri);
  }

  /**
   * Return the applicable URI in this catalog.
   *
   * <p>If a URI entry exists in the catalog file
   * for the URI specified, return the mapped value.</p>
   *
   * @param uri The URI to locate in the catalog
   *
   * @return The mapped URI or null
   */
  protected String resolveLocalURI(String uri)
    throws MalformedURLException, IOException {
    Enumeration en = catalogEntries.elements();
    while (en.hasMoreElements()) {
      CatalogEntry e = (CatalogEntry) en.nextElement();
      if (e.getEntryType() == URI
	  && (e.getEntryArg(0).equals(uri))) {
	return e.getEntryArg(1);
      }
    }

    // If there's a REWRITE_URI entry in this catalog, use it
    en = catalogEntries.elements();
    String startString = null;
    String prefix = null;
    while (en.hasMoreElements()) {
      CatalogEntry e = (CatalogEntry) en.nextElement();

      if (e.getEntryType() == REWRITE_URI) {
	String p = (String) e.getEntryArg(0);
	if (p.length() <= uri.length()
	    && p.equals(uri.substring(0, p.length()))) {
	  // Is this the longest prefix?
	  if (startString == null
	      || p.length() > startString.length()) {
	    startString = p;
	    prefix = e.getEntryArg(1);
	  }
	}
      }
    }

    if (prefix != null) {
      // return the uri with the new prefix
      return prefix + uri.substring(startString.length());
    }

    // If there's a URI_SUFFIX entry in this catalog, use it
    en = catalogEntries.elements();
    String suffixString = null;
    String suffixURI = null;
    while (en.hasMoreElements()) {
      CatalogEntry e = (CatalogEntry) en.nextElement();

      if (e.getEntryType() == URI_SUFFIX) {
	String p = (String) e.getEntryArg(0);
	if (p.length() <= uri.length()
	    && uri.endsWith(p)) {
	  // Is this the longest prefix?
	  if (suffixString == null
	      || p.length() > suffixString.length()) {
	    suffixString = p;
	    suffixURI = e.getEntryArg(1);
	  }
	}
      }
    }

    if (suffixURI != null) {
      // return the uri for the suffix
      return suffixURI;
    }

    // If there's a DELEGATE_URI entry in this catalog, use it
    en = catalogEntries.elements();
    Vector delCats = new Vector();
    while (en.hasMoreElements()) {
      CatalogEntry e = (CatalogEntry) en.nextElement();

      if (e.getEntryType() == DELEGATE_URI) {
	String p = (String) e.getEntryArg(0);
	if (p.length() <= uri.length()
	    && p.equals(uri.substring(0, p.length()))) {
	  // delegate this match to the other catalog

	  delCats.addElement(e.getEntryArg(1));
	}
      }
    }

    if (delCats.size() > 0) {
      Enumeration enCats = delCats.elements();

      if (catalogManager.debug.getDebug() > 1) {
	catalogManager.debug.message(2, "Switching to delegated catalog(s):");
	while (enCats.hasMoreElements()) {
	  String delegatedCatalog = (String) enCats.nextElement();
	  catalogManager.debug.message(2, "\t" + delegatedCatalog);
	}
      }

      Catalog dcat = newCatalog();

      enCats = delCats.elements();
      while (enCats.hasMoreElements()) {
	String delegatedCatalog = (String) enCats.nextElement();
	dcat.parseCatalog(delegatedCatalog);
      }

      return dcat.resolveURI(uri);
    }

    return null;
  }

  /**
   * Search the subordinate catalogs, in order, looking for a match.
   *
   * <p>This method searches the Catalog and returns the system
   * identifier specified for the given entity type with the given
   * name, public, and system identifiers. In some contexts, these
   * may be null.</p>
   *
   * @param entityType The CatalogEntry type for which this query is
   * being conducted. This is necessary in order to do the approprate
   * query on a subordinate catalog.
   * @param entityName The name of the entity being searched for, if
   * ap