| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.commons.jelly.task; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import org.apache.commons.jelly.JellyContext; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.tools.ant.Project; |
| |
| /** <p><code>AntJellyContext</code> represents the Jelly context from inside Ant.</p> |
| * |
| * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
| * @version $Revision$ |
| */ |
| |
| public class AntJellyContext extends JellyContext { |
| |
| /** The Ant project which contains the variables */ |
| private Project project; |
| |
| /** The Log to which logging calls will be made. */ |
| private Log log = LogFactory.getLog(AntJellyContext.class); |
| |
| public AntJellyContext(Project project, JellyContext parentJellyContext) { |
| super( parentJellyContext ); |
| this.project = project; |
| } |
| |
| /** @return the value of the given variable name */ |
| public Object getVariable(String name) { |
| // look in parent first |
| Object answer = super.getVariable(name); |
| if (answer == null) { |
| answer = project.getProperty(name); |
| } |
| |
| if ( log.isDebugEnabled() ) { |
| String answerString = null; |
| try { answerString = answer.toString(); } catch(Exception ex) {} |
| if(answerString==null && answer!=null) answerString = " of class " + answer.getClass(); |
| log.debug( "Looking up variable: " + name + " answer: " + answerString ); |
| } |
| |
| return answer; |
| } |
| |
| /** Sets the value of the given variable name */ |
| public void setVariable(String name, Object value) { |
| if ( log.isDebugEnabled() ) { |
| log.debug( "Setting variable: " + name + " to: " + value ); |
| } |
| |
| super.setVariable( name, value ); |
| |
| // only export string values back to Ant? |
| if ( value instanceof String ) { |
| project.setProperty(name, (String) value); |
| } |
| } |
| |
| /** Removes the given variable */ |
| public void removeVariable(String name) { |
| super.removeVariable( name ); |
| project.setProperty(name, null); |
| } |
| |
| /** |
| * @return an Iterator over the current variable names in this |
| * context |
| */ |
| public Iterator getVariableNames() { |
| return getVariables().keySet().iterator(); |
| } |
| |
| /** |
| * @return the Map of variables in this scope |
| */ |
| public Map getVariables() { |
| // we should add all the Project's properties |
| Map map = new HashMap( project.getProperties() ); |
| |
| // override any local properties |
| map.putAll( super.getVariables() ); |
| return map; |
| } |
| |
| /** |
| * Sets the Map of variables to use |
| */ |
| |
| public void setVariables(Map variables) { |
| super.setVariables(variables); |
| |
| // export any Ant properties |
| for ( Iterator iter = variables.entrySet().iterator(); iter.hasNext(); ) { |
| Map.Entry entry = (Map.Entry) iter.next(); |
| String key = (String) entry.getKey(); |
| Object value = entry.getValue(); |
| if ( value instanceof String ) { |
| project.setProperty(key, (String)value); |
| } |
| } |
| } |
| |
| |
| // Implementation methods |
| //------------------------------------------------------------------------- |
| |
| /** |
| * Factory method to create a new child of this context |
| */ |
| protected JellyContext createChildContext() { |
| return new AntJellyContext(project, this); |
| } |
| |
| } |