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From prick...@apache.org
Subject cvs commit: jakarta-commons-sandbox/periodicity/src/plugins-build/database/src/java/org/apache/commons/periodicity/database DriverContentHandler.java
Date Fri, 25 Oct 2002 04:29:43 GMT
prickett    2002/10/24 21:29:42

  Modified:    periodicity/conf/database/developers databases.xml
  Added:       periodicity/src/plugins-build/database/src/java/org/apache/commons/periodicity/database
                        DriverContentHandler.java
  Log:
  Changed the representation of driver schemes from
  
  <scheme>jdbc:database</scheme>
  
  <protocol>
    <scheme>jdbc:database</scheme>
  </protocol>
  
  A scheme should no longer be put directly in <driver> element. It must
  be nested in a protocol element inside the driver element.
  
  Added a SAX content handler to parse driver information out of the
  databases.xml file.
  
  Revision  Changes    Path
  1.4       +19 -7     jakarta-commons-sandbox/periodicity/conf/database/developers/databases.xml
  
  Index: databases.xml
  ===================================================================
  RCS file: /home/cvs/jakarta-commons-sandbox/periodicity/conf/database/developers/databases.xml,v
  retrieving revision 1.3
  retrieving revision 1.4
  diff -u -r1.3 -r1.4
  --- databases.xml	21 Oct 2002 14:06:16 -0000	1.3
  +++ databases.xml	25 Oct 2002 04:29:42 -0000	1.4
  @@ -106,16 +106,20 @@
         by Mark Matthews who is now affiliated with MySQL AB</description>
         <web-url>http://mmmysql.sourceforge.net</web-url>
         <class-name>org.gjt.mm.mysql.Driver</class-name>
  -      <scheme>jdbc:mysql</scheme>
  +      <protocol>
  +        <scheme>jdbc:mysql</scheme>
  +      </protocol>  
       </driver>
   
       <driver name="postgresql.default">
         <short-description>PostgreSQL JDBC Driver</short-description>
         <description>The PostgreSQL JDBC driver is an open source JDBC driver
  -      for the POstgreSQL database. It is developed and maintained by the 
  +      for the PostgreSQL database. It is developed and maintained by the 
         PostgreSQL development team.</description>
         <class-name>org.postgresql.Driver</class-name>
  -      <scheme>jdbc:postgresql</scheme>
  +      <protocol>
  +        <scheme>jdbc:postgresql</scheme>
  +      </protocol>  
       </driver>
   
       <driver name="oracle.default">
  @@ -125,7 +129,9 @@
         and maintained by Oracle Corporation.</description>
         <web-url>http://otn.oracle.com/tech/java/sqlj_jdbc/htdocs</web-url>
         <class-name>oracle.jdbc.driver.OracleDriver</class-name>
  -      <scheme>jdbc:oracle:thin</scheme>
  +      <protocol>
  +        <scheme>jdbc:oracle:thin</scheme>
  +      </protocol>  
       </driver>
   
       <driver name="axion.default">
  @@ -136,12 +142,16 @@
         community</description>
         <web-url>http://axion.tigris.org/quickstart.html</web-url>
         <class-name>org.axiondb.jdbc.AxionDriver</class-name>
  -      <scheme>jdbc:axiondb</scheme>
  +      <protocol>
  +        <scheme>jdbc:axiondb</scheme>
  +      </protocol>  
       </driver>
   
       <driver name="cloudscape.default">
         <class-name>com.ibm.db2j.jdbc.DB2jDriver</class-name>
  -      <scheme>jdbc:db2j</scheme>
  +      <protocol>
  +        <scheme>jdbc:db2j</scheme>
  +      </protocol>  
       </driver>  
      
       <driver name="hypersonic.default">
  @@ -171,7 +181,9 @@
         Borland Software Corporation</description>
         <web-url>http://www.interbase.com</web-url>
         <class-name>interbase.interclient.Driver</class-name>
  -      <scheme>jdbc:interbase</scheme>
  +      <protocol>
  +        <scheme>jdbc:interbase</scheme>
  +      </protocol>  
       </driver>
       
     </drivers>  
  
  
  
  1.1                  jakarta-commons-sandbox/periodicity/src/plugins-build/database/src/java/org/apache/commons/periodicity/database/DriverContentHandler.java
  
  Index: DriverContentHandler.java
  ===================================================================
  
  package org.apache.commons.periodicity.database;
  
  /*
   * $Header: /home/cvs/jakarta-commons-sandbox/periodicity/src/plugins-build/database/src/java/org/apache/commons/periodicity/database/DriverContentHandler.java,v
1.1 2002/10/25 04:29:42 prickett Exp $
   * $Revision: 1.1 $
   * $Date: 2002/10/25 04:29:42 $
   *
   * ====================================================================
   * 
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2000-2002 The Apache Software Foundation.  All rights 
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer. 
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:  
   *       "This product includes software developed by the 
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Commons", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written 
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */ 
  
  
  import org.xml.sax.Attributes;
  import org.xml.sax.SAXException;
  import org.xml.sax.helpers.DefaultHandler;
  
  public class DriverContentHandler extends DefaultHandler
  {
  
      /** The qualified name of the drivers element */
      public static final String DRIVERS_ELEMENT_QNAME = "drivers";
  
      /** The qualified name of the driver element */
      public static final String DRIVER_ELEMENT_QNAME = "driver";
  
      /** The qualified name of the short description element */
      public static final String SHORT_DESC_QNAME = "short-description";
  
      /** The qualified name of the description element */
      public static final String DESCRIPTION_QNAME = "description";
  
      /** The qualified name of the web url element */
      public static final String WEB_URL_QNAME = "web-url";
  
      /** The qualified name of the driver class name element */
      public static final String DRIVER_CLASS_QNAME = "class-name";
  
      /** The qualified name of the url scheme element */
      public static final String SCHEME_QNAME = "scheme";
  
      /** The qualified name of the protocol element */
      public static final String PROTOCOL_ELEMENT_QNAME = "protocol";
  
      /** The qualified name of the name attribute for drivers and protocols */
      public static final String NAME_QNAME_ATTRIBUTE = "name";
  
  
      /** A flag to tell us whether we should be looking to add new drivers */
      private boolean lookForDrivers = false;
  
      /** A flag to tell us whether we should process protocols */
      private boolean processProtocol = false;
  
      /** A variable to hold the current jdbc driver's name */
      private String name = null;
  
      /** A variable to hold the short description for the current jdbc driver */
      private String shortDescription = null;
  
      /** A variable to hold the description for the current jdbc driver */
      private String description = null;
  
      /** A variable to hold the name of the current jdbc class */
      private String driverClassName = null;
  
      /** A variable to hold the url to the current driver's website */
      private String webUrl = null;
  
      /** A variable to hold the url scheme for the current jdbc driver */
      private String scheme = null;
  
      /** A buffer to hold the current character information until it
          is stored in its respective variable */
      private StringBuffer buffy = null;
  
  
      public void startElement(String uri, String localName, String qName,
             Attributes attributes) throws SAXException
      {       
          if(!lookForDrivers && qName != null && 
                 qName.equals(DRIVERS_ELEMENT_QNAME))
          {
              lookForDrivers = true;
          }
          else if(lookForDrivers && qName != null && 
                 qName.equals(DRIVER_ELEMENT_QNAME))
          {
              if(attributes != null)
              {
                  String rawName = attributes.getValue(NAME_QNAME_ATTRIBUTE);
                  if(rawName != null)
                  {
                      name = rawName;
                  }
                  else if(rawName == null)
                  {
                      throw new SAXException(
                             "The name attribute in the driver element is null.");
                  }
                  else
                  {
                      throw new SAXException("UNEXPECTED EXCEPTION");
                  }
              }
              else if(attributes == null)
              {
                  throw new SAXException(
                         "The attributes of the driver element are null.");
              }
              else
              {
                  throw new SAXException("UNEXPECTED EXCEPTION");
              }
          }
          else if(lookForDrivers && qName != null) 
          {
              buffy = new StringBuffer();
          }
          else if(qName == null)
          {
              throw new SAXException("qName == null");
          }
          else
          {
              throw new SAXException("UNEXPECTED EXCEPTION");
          }
      }
      
      public void endElement(String uri, String localName, String qName)
             throws SAXException
      {
          try
          {
              if(lookForDrivers && processProtocol && qName != null &&
                     qName.equals(PROTOCOL_ELEMENT_QNAME))
              {
                  addProtocol();
                  processProtocol = false;
              }
              else if(lookForDrivers && processProtocol && qName != null &&
                     qName.equals(SCHEME_QNAME))
              {
                  scheme = buffy.toString();
              }    
              else if(lookForDrivers && !processProtocol && qName != null
&& 
                     qName.equals(DRIVER_ELEMENT_QNAME))
              {
                   addDriverToDriverService();
              }
              else if(lookForDrivers && !processProtocol && qName != null
&& 
                     qName.equals(SHORT_DESC_QNAME))
              {
                  shortDescription = buffy.toString();
              }
              else if(lookForDrivers && !processProtocol && qName != null
&&
                     qName.equals(DESCRIPTION_QNAME))
              {
                  description = buffy.toString();
              }
              else if(lookForDrivers && !processProtocol && qName != null
&&
                     qName.equals(WEB_URL_QNAME))
              {
                  webUrl = buffy.toString();
              }
              else if(lookForDrivers && !processProtocol && qName != null
&& 
                     qName.equals(DRIVER_CLASS_QNAME))
              {
                  driverClassName = buffy.toString();
              }
              else if(!lookForDrivers && processProtocol)
              {
                  throw new SAXException(
                         "We should not be processing protocols if we are not " +
                         "looking for drivers.");
              }
              else if(qName == null)
              {
                  throw new SAXException("qName == null");
              }
              else
              {
                  throw new SAXException("Unrecognized driver element \n" +
                         "qName = \"" + qName + "\".");
              }
          }
          finally
          {
              buffy = null;
          }
      }
  
      public void characters(char[] ch, int start, int length)
      {
          if(buffy != null)
          {
              buffy.append(ch, start, length);
          }
      }    
  
      private void addProtocol()
      {
      }
  
      private void addDriverToDriverService()
      {
      }
  
  }    
  
  
  

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