/* * Copyright (c) 2005, John Mettraux, OpenWFE.org * All rights reserved. *  * Redistribution and use in source and binary forms, with or without  * modification, are permitted provided that the following conditions are met: *  * . Redistributions of source code must retain the above copyright notice, this *   list of conditions and the following disclaimer.   *  * . 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. *  * . Neither the name of the "OpenWFE" nor the names of its contributors may be *   used to endorse or promote products derived from this software without *   specific prior written permission. *  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"  * AND ANY EXPRESS 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 COPYRIGHT OWNER OR CONTRIBUTORS BE  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR  * CONSEQUENTIAL DAMAGES (INCLUDING, 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. * * $Id: PythonInterpreter.java,v 1.3 2005/05/17 16:40:19 jmettraux Exp $ *///// PythonInterpreter.java//// jmettraux@openwfe.org//// generated with // jtmpl 1.0.04 20.11.2001 John Mettraux (jmettraux@openwfe.org)//package openwfe.org.apre.jython;import org.python.core.PyObject;import openwfe.org.apre.ApreException;/** * An encapsulation of the jython interpreter with methods for easily  * getting python-written commands ready to use. * * <p><font size=2>CVS Info : * <br>$Author: jmettraux $ * <br>$Date: 2005/05/17 16:40:19 $ * <br>$Id: PythonInterpreter.java,v 1.3 2005/05/17 16:40:19 jmettraux Exp $ </font> * * @author jmettraux@openwfe.org */public class PythonInterpreter{    private final static PythonInterpreter theInterpreter         = new PythonInterpreter();    org.apache.log4j.Logger log = org.apache.log4j.Logger        .getLogger(PythonInterpreter.class.getName());    //    // FIELDS        private org.python.util.PythonInterpreter interpreter;    private java.util.List interpretedFiles = new java.util.ArrayList(25);    //    // CONSTRUCTORS    public PythonInterpreter ()    {        org.python.core.PySystemState.initialize();        this.interpreter = new org.python.util.PythonInterpreter();    }    //    // METHODS    /*    private void importClass (String fullClassName)    {        if (fullClassName.indexOf(".") < 0) return;        String[] ss = fullClassName.split("\\.");        for (int j=0; j<ss.length; j++) log.debug("........ "+j+" : "+ss[j]);        StringBuffer path = new StringBuffer();        String className = ss[ss.length-1];        for (int i=0; i<ss.length-1; i++)        {            path.append(ss[i]);            if (i < ss.length-2) path.append('.');        }        log.debug("path is >"+path+"<");        log.debug("className is >"+className+"<");        StringBuffer command = new StringBuffer();        command.append("from ");        command.append(path);        command.append(" import ");        command.append(className);        this.interpreter.exec(command.toString());    }    */    public Object instantiate (String className, Class classType)        throws ApreException    {        //System.out.println("Looking for class '"+className+"'");                //importClass(className);        PyObject pyClass = this.interpreter.get(className);        if (pyClass == null)         {            //System.out.println("found nothing...");            return null;        }        PyObject po = pyClass.__call__();        Object o = po.__tojava__(classType);        if (o == org.python.core.Py.NoConversion)        {            throw new ApreException                ("Found class '"+className+                 "' in python interpreter but failed to use it\n");        }        return o;    }    public void loadAndInterpret (String fileName)    {        if (this.interpretedFiles.contains(fileName)) return;        log.info("Loading and interpreting '"+fileName+"'");        this.interpreter.execfile(fileName);        this.interpretedFiles.add(fileName);    }    public void loadAndInterpretDirectory (String dir)    {        loadAndInterpretDirectory(new java.io.File(dir));    }    private void loadAndInterpretDirectory (java.io.File dir)    {        java.io.File[] files = dir.listFiles();        for (int i=0; i<files.length; i++)        {            java.io.File f = files[i];            if (f.isDirectory())            {                loadAndInterpretDirectory(f);                continue;            }            if (f.getName().endsWith(".py"))            {                loadAndInterpret(f.getPath());            }        }    }    /*    public void loadAndInterpret (java.util.List fileNames)    {        if (fileNames == null || fileNames.size() < 1) return;        java.util.Iterator it = fileNames.iterator();        while (it.hasNext())        {            loadAndInterpret((String)it.next());        }    }    */    /*    public PyObject eval (String command)        throws ApreException    {        java.util.StringTokenizer st = new java.util.StringTokenizer(command);        st.nextToken(); // skip 'eval';        if ( ! st.hasMoreTokens())        {            throw new ApreException                ("'get' or 'exec' awaited at the beginning of '"+command+"'");        }        String intention = st.nextToken().toLowerCase();        String pyStuff = command.substring(6+intention.length());        if (intention.equals("exec"))        {            this.interpreter.exec(pyStuff);            return null;        }        else if (intention.equals("get"))        {            return this.interpreter.get(pyStuff);        }        throw new ApreException            ("'get' or 'exec' awaited at the beginning of '"+command+"'");    }    */    //    // STATIC METHODS    public static PythonInterpreter getInstance ()    {        return theInterpreter;    }}