Clover coverage report - Code Coverage for tapestry release 3.1-alpha-1
Coverage timestamp: Mon Feb 21 2005 09:16:14 EST
file stats: LOC: 150   Methods: 6
NCLOC: 87   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
SessionPropertyPersistenceStrategy.java 100% 100% 100% 100%
coverage
 1   
 // Copyright 2005 The Apache Software Foundation
 2   
 //
 3   
 // Licensed under the Apache License, Version 2.0 (the "License");
 4   
 // you may not use this file except in compliance with the License.
 5   
 // You may obtain a copy of the License at
 6   
 //
 7   
 //     http://www.apache.org/licenses/LICENSE-2.0
 8   
 //
 9   
 // Unless required by applicable law or agreed to in writing, software
 10   
 // distributed under the License is distributed on an "AS IS" BASIS,
 11   
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 12   
 // See the License for the specific language governing permissions and
 13   
 // limitations under the License.
 14   
 
 15   
 package org.apache.tapestry.record;
 16   
 
 17   
 import java.util.ArrayList;
 18   
 import java.util.Collection;
 19   
 import java.util.Collections;
 20   
 import java.util.Enumeration;
 21   
 
 22   
 import javax.servlet.http.HttpServletRequest;
 23   
 import javax.servlet.http.HttpSession;
 24   
 
 25   
 import org.apache.hivemind.util.Defense;
 26   
 import org.apache.tapestry.IRequestCycle;
 27   
 import org.apache.tapestry.util.StringSplitter;
 28   
 
 29   
 /**
 30   
  * The most basic {@link org.apache.tapestry.record.PropertyPersistenceStrategy}, which stores
 31   
  * properties in the HttpSession as attributes.
 32   
  * 
 33   
  * @author Howard M. Lewis Ship
 34   
  * @since 3.1
 35   
  */
 36   
 public class SessionPropertyPersistenceStrategy implements PropertyPersistenceStrategy
 37   
 {
 38   
     // Really, the name of the servlet; used as a prefix on all HttpSessionAttribute keys
 39   
     // to keep things straight if multiple Tapestry apps are deployed
 40   
     // in the same WAR.
 41   
 
 42   
     private String _applicationId;
 43   
 
 44   
     private HttpServletRequest _request;
 45   
 
 46   
     private StringSplitter _splitter = new StringSplitter(',');
 47   
 
 48  34
     public void store(String pageName, String idPath, String propertyName, Object newValue)
 49   
     {
 50  34
         Defense.notNull(pageName, "pageName");
 51  34
         Defense.notNull(propertyName, "propertyName");
 52   
 
 53  34
         HttpSession session = _request.getSession(true);
 54   
 
 55  34
         StringBuffer buffer = new StringBuffer();
 56   
 
 57  34
         buffer.append(_applicationId);
 58  34
         buffer.append(",");
 59  34
         buffer.append(pageName);
 60   
 
 61  34
         if (idPath != null)
 62   
         {
 63  1
             buffer.append(",");
 64  1
             buffer.append(idPath);
 65   
         }
 66   
 
 67  34
         buffer.append(",");
 68  34
         buffer.append(propertyName);
 69   
 
 70  34
         String key = buffer.toString();
 71   
 
 72  34
         if (newValue == null)
 73  4
             session.removeAttribute(key);
 74   
         else
 75  30
             session.setAttribute(key, newValue);
 76   
     }
 77   
 
 78  267
     public Collection getStoredChanges(String pageName, IRequestCycle cycle)
 79   
     {
 80  267
         Defense.notNull(pageName, "pageName");
 81   
 
 82  267
         HttpSession session = _request.getSession(false);
 83   
 
 84  267
         if (session == null)
 85  200
             return Collections.EMPTY_LIST;
 86   
 
 87  67
         Collection result = new ArrayList();
 88   
 
 89  67
         String prefix = _applicationId + "," + pageName + ",";
 90   
 
 91  67
         Enumeration e = session.getAttributeNames();
 92  67
         while (e.hasMoreElements())
 93   
         {
 94  127
             String key = (String) e.nextElement();
 95   
 
 96  127
             if (key.startsWith(prefix))
 97   
             {
 98  25
                 IPageChange change = buildChange(key, session.getAttribute(key));
 99   
 
 100  25
                 result.add(change);
 101   
             }
 102   
         }
 103   
 
 104  67
         return result;
 105   
     }
 106   
 
 107  25
     private IPageChange buildChange(String key, Object value)
 108   
     {
 109  25
         String[] tokens = _splitter.splitToArray(key);
 110   
 
 111   
         // Either app-name,page-name,id-path,property
 112   
         // or app-name,page-name,property
 113   
 
 114  25
         String idPath = (tokens.length == 4) ? tokens[2] : null;
 115  25
         String propertyName = tokens[tokens.length - 1];
 116   
 
 117  25
         return new PageChange(idPath, propertyName, value);
 118   
     }
 119   
 
 120  3
     public void discardStoredChanges(String pageName, IRequestCycle cycle)
 121   
     {
 122  3
         Defense.notNull(pageName, "pageName");
 123   
 
 124  3
         HttpSession session = _request.getSession(false);
 125   
 
 126  3
         if (session == null)
 127  1
             return;
 128   
 
 129  2
         String prefix = _applicationId + "," + pageName + ",";
 130   
 
 131  2
         Enumeration e = session.getAttributeNames();
 132  2
         while (e.hasMoreElements())
 133   
         {
 134  2
             String key = (String) e.nextElement();
 135   
 
 136  2
             if (key.startsWith(prefix))
 137  1
                 session.removeAttribute(key);
 138   
         }
 139   
     }
 140   
 
 141  59
     public void setApplicationId(String applicationName)
 142   
     {
 143  59
         _applicationId = applicationName;
 144   
     }
 145   
 
 146  62
     public void setRequest(HttpServletRequest request)
 147   
     {
 148  62
         _request = request;
 149   
     }
 150   
 }