Coverage report

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org.apache.commons.jelly.task.AntJellyContext
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 1  
 /*
 2  
  * Copyright 2002,2004 The Apache Software Foundation.
 3  
  *
 4  
  * Licensed under the Apache License, Version 2.0 (the "License");
 5  
  * you may not use this file except in compliance with the License.
 6  
  * You may obtain a copy of the License at
 7  
  *
 8  
  *      http://www.apache.org/licenses/LICENSE-2.0
 9  
  *
 10  
  * Unless required by applicable law or agreed to in writing, software
 11  
  * distributed under the License is distributed on an "AS IS" BASIS,
 12  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 13  
  * See the License for the specific language governing permissions and
 14  
  * limitations under the License.
 15  
  */
 16  
 
 17  
 package org.apache.commons.jelly.task;
 18  
 
 19  
 import java.util.HashMap;
 20  
 import java.util.Iterator;
 21  
 import java.util.Map;
 22  
 
 23  
 import org.apache.commons.jelly.JellyContext;
 24  
 import org.apache.commons.logging.Log;
 25  
 import org.apache.commons.logging.LogFactory;
 26  
 import org.apache.tools.ant.Project;
 27  
 
 28  
 /** <p><code>AntJellyContext</code> represents the Jelly context from inside Ant.</p>
 29  
   *
 30  
   * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
 31  
   * @version $Revision: 1.10 $
 32  
   */
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 34  0
 public class AntJellyContext extends JellyContext {
 35  
 
 36  
     /** The Ant project which contains the variables */
 37  
     private Project project;
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 39  
     /** The Log to which logging calls will be made. */
 40  0
     private Log log = LogFactory.getLog(AntJellyContext.class);
 41  
 
 42  
     public AntJellyContext(Project project, JellyContext parentJellyContext) {
 43  0
         super( parentJellyContext );
 44  0
         this.project = project;
 45  0
     }
 46  
 
 47  
     /** @return the value of the given variable name */
 48  
     public Object getVariable(String name) {
 49  
         // look in parent first
 50  0
         Object answer = super.getVariable(name);
 51  0
         if (answer == null) {
 52  0
             answer = project.getProperty(name);
 53  
         }
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 55  0
         if ( log.isDebugEnabled() ) {
 56  0
             log.debug( "Looking up variable: " + name + " answer: " + answer );
 57  
         }
 58  
 
 59  0
         return answer;
 60  
     }
 61  
 
 62  
     /** Sets the value of the given variable name */
 63  
     public void setVariable(String name, Object value) {
 64  0
         if ( log.isDebugEnabled() ) {
 65  0
             log.debug( "Setting variable: " + name + " to: " + value );
 66  
         }
 67  
 
 68  0
         super.setVariable( name, value );
 69  
 
 70  
         // only export string values back to Ant?
 71  0
         if ( value instanceof String ) {
 72  0
             project.setProperty(name, (String) value);
 73  
         }
 74  0
     }
 75  
 
 76  
     /** Removes the given variable */
 77  
     public void removeVariable(String name) {
 78  0
         super.removeVariable( name );
 79  0
         project.setProperty(name, null);
 80  0
     }
 81  
 
 82  
     /**
 83  
      * @return an Iterator over the current variable names in this
 84  
      * context
 85  
      */
 86  
     public Iterator getVariableNames() {
 87  0
         return getVariables().keySet().iterator();
 88  
     }
 89  
 
 90  
     /**
 91  
      * @return the Map of variables in this scope
 92  
      */
 93  
     public Map getVariables() {
 94  
         // we should add all the Project's properties
 95  0
         Map map = new HashMap( project.getProperties() );
 96  
 
 97  
         // override any local properties
 98  0
         map.putAll( super.getVariables() );
 99  0
         return map;
 100  
     }
 101  
 
 102  
     /**
 103  
      * Sets the Map of variables to use
 104  
      */
 105  
 
 106  
     public void setVariables(Map variables) {
 107  0
         super.setVariables(variables);
 108  
 
 109  
         // export any Ant properties
 110  0
         for ( Iterator iter = variables.entrySet().iterator(); iter.hasNext(); ) {
 111  0
             Map.Entry entry = (Map.Entry) iter.next();
 112  0
             String key = (String) entry.getKey();
 113  0
             Object value = entry.getValue();
 114  0
             if ( value instanceof String ) {
 115  0
                 project.setProperty(key, (String)value);
 116  
             }
 117  
         }
 118  0
     }
 119  
 
 120  
 
 121  
     // Implementation methods
 122  
     //-------------------------------------------------------------------------
 123  
 
 124  
     /**
 125  
      * Factory method to create a new child of this context
 126  
      */
 127  
     protected JellyContext createChildContext() {
 128  0
         return new AntJellyContext(project, this);
 129  
     }
 130  
 
 131  
 }

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