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From un...@apache.org
Subject cvs commit: cocoon-2.1/src/blocks/repository/java/org/apache/cocoon/components/source/impl MultiSourceValidity.java
Date Thu, 23 Oct 2003 08:52:50 GMT
unico       2003/10/23 01:52:50

  Added:       src/blocks/repository/java/org/apache/cocoon/components/source/impl
                        MultiSourceValidity.java
  Removed:     src/blocks/scratchpad/java/org/apache/cocoon/components/source/impl
                        MultiSourceValidity.java
  Log:
  move this along with TraversableGenerator. 
  Now there is no compilation dependency on scratchpad anymore
  
  Revision  Changes    Path
  1.1                  cocoon-2.1/src/blocks/repository/java/org/apache/cocoon/components/source/impl/MultiSourceValidity.java
  
  Index: MultiSourceValidity.java
  ===================================================================
  /*
  
   ============================================================================
                     The Apache Software License, Version 1.1
   ============================================================================
  
   Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
  
   Redistribution and use in source and binary forms, with or without modifica-
   tion, 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  acknowledgment:  "This product includes  software
      developed  by the  Apache Software Foundation  (http://www.apache.org/)."
      Alternately, this  acknowledgment may  appear in the software itself,  if
      and wherever such third-party acknowledgments normally appear.
  
   4. The names "Apache Cocoon" 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 name,  without prior written permission  of the
      Apache Software Foundation.
  
   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 (INCLU-
   DING, 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 and was  originally created by
   Stefano Mazzocchi  <stefano@apache.org>. For more  information on the Apache
   Software Foundation, please see <http://www.apache.org/>.
  
  */
  package org.apache.cocoon.components.source.impl;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.excalibur.source.Source;
  import org.apache.excalibur.source.SourceResolver;
  import org.apache.excalibur.source.SourceValidity;
  
  /**
   * An aggregated validity for multiple sources.
   * 
   * @author <a href="http://www.apache.org/~sylvain">Sylvain Wallez</a>
   * @version CVS $Id: MultiSourceValidity.java,v 1.1 2003/10/23 08:52:50 unico Exp $
   */
  public class MultiSourceValidity implements SourceValidity{
  
      private long expiry;
      private long delay;
      private List data = new ArrayList();
      private boolean isClosed = false;
      
      /** SourceResolver. Transient in order not to be serialized */
      private transient SourceResolver resolver;
      
      public MultiSourceValidity(SourceResolver resolver, long delay) {
          this.resolver = resolver;
          this.expiry = System.currentTimeMillis() + delay;
          this.delay = delay;
      }
      
      public void addSource(Source src) {
          if (this.data != null) {
              SourceValidity validity = src.getValidity();
              if (validity == null) {
                  // one of the sources has no validity : this object will always be invalid
                  this.data = null;
              } else {
                  // Add the validity and URI to the list
                  this.data.add(validity);
                  this.data.add(src.getURI());
              }
          }
      }
      
      public void close() {
          this.isClosed = true;
          this.resolver = null;
      }
      
      public int isValid() {
          if (System.currentTimeMillis() <= expiry) {
              return 1;
          }
          expiry = System.currentTimeMillis() + delay;
          
          if (data == null || !isClosed) {
              return -1;
          } else {
              return computeStatus(null);
          }
      }
  
      public int isValid(SourceValidity newValidity) {
          if (data == null || !isClosed) {
              return -1;
          }
          
          if (newValidity instanceof MultiSourceValidity) {
              return computeStatus(((MultiSourceValidity)newValidity).resolver);
          } else {
              // Don't know
              return -1;
          }
      }
      
      private int computeStatus(SourceResolver resolver) {
          for (int i = 0; i < data.size(); i+=2) {
              SourceValidity validity = (SourceValidity)data.get(i);
              switch(validity.isValid()) {
                  case -1:
                      // invalid : stop examining
                      return -1;
                  case 1:
                      // valid : just continue to next source
                      break;
                  case 0:
                      // don't know : check with the new source
                      if (resolver == null) {
                          // we have no resolver : definitely don't know (need to have one)
                          return 0;
                      }
                      try {
                          Source newSrc = resolver.resolveURI((String)data.get(i+1));
                          int value = validity.isValid(newSrc.getValidity());
                          resolver.release(newSrc);
                          if (value != 1) {
                              return -1;
                          }
                      } catch(IOException ioe) {
                          return -1;
                      }
              }
          }
          
          // All items checked successfully
          return 1;
      }
  }
  
  
  

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