Clover coverage report - groovy - 1.0-beta-8
Coverage timestamp: Fri Dec 17 2004 14:55:55 GMT
file stats: LOC: 197   Methods: 9
NCLOC: 86   Classes: 1
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 Source file Conditionals Statements Methods TOTAL
GroovyEngine.java 0% 0% 0% 0%
coverage
 1   
 /*
 2   
  $Id: GroovyEngine.java,v 1.9 2004/12/14 00:08:26 spullara Exp $
 3   
 
 4   
  Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
 5   
 
 6   
  Redistribution and use of this software and associated documentation
 7   
  ("Software"), with or without modification, are permitted provided
 8   
  that the following conditions are met:
 9   
 
 10   
  1. Redistributions of source code must retain copyright
 11   
     statements and notices.  Redistributions must also contain a
 12   
     copy of this document.
 13   
 
 14   
  2. Redistributions in binary form must reproduce the
 15   
     above copyright notice, this list of conditions and the
 16   
     following disclaimer in the documentation and/or other
 17   
     materials provided with the distribution.
 18   
 
 19   
  3. The name "groovy" must not be used to endorse or promote
 20   
     products derived from this Software without prior written
 21   
     permission of The Codehaus.  For written permission,
 22   
     please contact info@codehaus.org.
 23   
 
 24   
  4. Products derived from this Software may not be called "groovy"
 25   
     nor may "groovy" appear in their names without prior written
 26   
     permission of The Codehaus. "groovy" is a registered
 27   
     trademark of The Codehaus.
 28   
 
 29   
  5. Due credit should be given to The Codehaus -
 30   
     http://groovy.codehaus.org/
 31   
 
 32   
  THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
 33   
  ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 34   
  NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 35   
  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 36   
  THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 37   
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 38   
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 39   
  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 40   
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 41   
  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 42   
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 43   
  OF THE POSSIBILITY OF SUCH DAMAGE.
 44   
 
 45   
  */
 46   
 package org.codehaus.groovy.bsf;
 47   
 
 48   
 import groovy.lang.Closure;
 49   
 import groovy.lang.GroovyShell;
 50   
 import org.apache.bsf.BSFDeclaredBean;
 51   
 import org.apache.bsf.BSFException;
 52   
 import org.apache.bsf.BSFManager;
 53   
 import org.apache.bsf.util.BSFEngineImpl;
 54   
 import org.apache.bsf.util.BSFFunctions;
 55   
 import org.codehaus.groovy.runtime.InvokerHelper;
 56   
 
 57   
 import java.util.Vector;
 58   
 
 59   
 /**
 60   
  * A BSF Engine for the <a href="http://groovy.codehaus.org/">Groovy</a>
 61   
  * scripting language.
 62   
  * <p/>
 63   
  * It's derived from the Jython / JPython engine
 64   
  *
 65   
  * @author James Strachan
 66   
  */
 67   
 public class GroovyEngine extends BSFEngineImpl {
 68   
     private static final String[] EMPTY_ARGS = {
 69   
     };
 70   
 
 71   
     protected GroovyShell shell;
 72   
 
 73   
     /**
 74   
      * Convert a non java class name to a java classname
 75   
      * This is used to convert a script name to a name
 76   
      * that can be used as a classname with the script is
 77   
      * loaded in GroovyClassloader#load()
 78   
      * The method simply replaces any invalid characters
 79   
      * with "_".
 80   
      */
 81  0
     private String convertToValidJavaClassname(String inName) {
 82  0
         if (inName == null || inName == "") {
 83  0
             return "_";
 84   
         }
 85  0
         StringBuffer output = new StringBuffer(inName.length());
 86  0
         boolean firstChar = true;
 87  0
         for (int i = 0; i < inName.length(); ++i) {
 88  0
             char ch = inName.charAt(i);
 89  0
             if (firstChar && !Character.isJavaIdentifierStart(ch)) {
 90  0
                 ch = '_';
 91  0
             } else if (!firstChar
 92   
                     && !(Character.isJavaIdentifierPart(ch) || ch == '.')) {
 93  0
                 ch = '_';
 94   
             }
 95  0
             firstChar = (ch == '.');
 96  0
             output.append(ch);
 97   
         }
 98  0
         return output.toString();
 99   
     }
 100   
 
 101   
     /**
 102   
      * Allow an anonymous function to be declared and invoked
 103   
      */
 104  0
     public Object apply(java.lang.String source,
 105   
                         int lineNo,
 106   
                         int columnNo,
 107   
                         Object funcBody,
 108   
                         Vector paramNames,
 109   
                         Vector arguments)
 110   
             throws BSFException {
 111   
 
 112  0
         Object object = eval(source, lineNo, columnNo, funcBody);
 113  0
         if (object instanceof Closure) {
 114   
             // lets call the function
 115   
 
 116   
             /** @todo we could turn the 2 vectors into a Map */
 117  0
             Closure closure = (Closure) object;
 118  0
             return closure.call(arguments.toArray());
 119   
         }
 120  0
         return object;
 121   
     }
 122   
 
 123   
     /**
 124   
      * Call the named method of the given object.
 125   
      */
 126  0
     public Object call(Object object, String method, Object[] args) throws BSFException {
 127  0
         return InvokerHelper.invokeMethod(object, method, args);
 128   
     }
 129   
 
 130   
     /**
 131   
      * Declare a bean
 132   
      */
 133  0
     public void declareBean(BSFDeclaredBean bean) throws BSFException {
 134   
         //System.out.println("Declaring bean: " + bean.name + " value: " + bean.bean);
 135  0
         shell.setVariable(bean.name, bean.bean);
 136   
     }
 137   
 
 138   
     /**
 139   
      * Evaluate an expression.
 140   
      */
 141  0
     public Object eval(String source, int lineNo, int columnNo, Object script) throws BSFException {
 142  0
         try {
 143  0
             source = convertToValidJavaClassname(source);
 144  0
             Object result = getEvalShell().evaluate(script.toString(), source);
 145  0
             return result;
 146   
         } catch (Exception e) {
 147  0
             throw new BSFException(BSFException.REASON_EXECUTION_ERROR, "exception from Groovy: " + e, e);
 148   
         }
 149   
     }
 150   
 
 151   
     /**
 152   
      * Execute a script.
 153   
      */
 154  0
     public void exec(String source, int lineNo, int columnNo, Object script) throws BSFException {
 155  0
         try {
 156   
             // use evaluate to pass in the BSF variables
 157  0
             source = convertToValidJavaClassname(source);
 158  0
             getEvalShell().evaluate(script.toString(), source);
 159   
             //getEvalShell().run(script.toString(), source, EMPTY_ARGS);
 160   
         } catch (Exception e) {
 161  0
             throw new BSFException(BSFException.REASON_EXECUTION_ERROR, "exception from Groovy: " + e, e);
 162   
         }
 163   
     }
 164   
 
 165   
     /**
 166   
      * Initialize the engine.
 167   
      */
 168  0
     public void initialize(BSFManager mgr, String lang, Vector declaredBeans) throws BSFException {
 169  0
         super.initialize(mgr, lang, declaredBeans);
 170   
 
 171   
         // create a shell
 172  0
         shell = new GroovyShell(mgr.getClassLoader());
 173   
 
 174   
         // register the mgr with object name "bsf"
 175  0
         shell.setVariable("bsf", new BSFFunctions(mgr, this));
 176   
 
 177  0
         int size = declaredBeans.size();
 178  0
         for (int i = 0; i < size; i++) {
 179  0
             declareBean((BSFDeclaredBean) declaredBeans.elementAt(i));
 180   
         }
 181   
     }
 182   
 
 183   
     /**
 184   
      * Undeclare a previously declared bean.
 185   
      */
 186  0
     public void undeclareBean(BSFDeclaredBean bean) throws BSFException {
 187  0
         shell.setVariable(bean.name, null);
 188   
     }
 189   
 
 190   
     /**
 191   
      * @return a newly created GroovyShell using the same variable scope but a new class loader
 192   
      */
 193  0
     protected GroovyShell getEvalShell() {
 194  0
         return new GroovyShell(shell);
 195   
     }
 196   
 }
 197