cmsshell.java

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/*
 * File   : $Source: /usr/local/cvs/opencms/src/org/opencms/main/CmsShell.java,v $
 * Date   : $Date: 2007-08-13 16:29:59 $
 * Version: $Revision: 1.50 $
 *
 * This library is part of OpenCms -
 * the Open Source Content Management System
 *
 * Copyright (c) 2002 - 2007 Alkacon Software GmbH (http://www.alkacon.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * For further information about Alkacon Software GmbH, please see the
 * company website: http://www.alkacon.com
 *
 * For further information about OpenCms, please see the
 * project website: http://www.opencms.org
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.opencms.main;

import org.opencms.db.CmsUserSettings;
import org.opencms.file.CmsObject;
import org.opencms.i18n.CmsLocaleManager;
import org.opencms.i18n.CmsMessages;
import org.opencms.util.CmsDataTypeUtil;
import org.opencms.util.CmsFileUtil;
import org.opencms.util.CmsPropertyUtils;
import org.opencms.util.CmsStringUtil;

import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.io.StreamTokenizer;
import java.io.StringReader;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.TreeMap;

import org.apache.commons.collections.ExtendedProperties;

/**
 * A commad line interface to access OpenCms functions which 
 * is used for the initial setup and also can be used to directly access the OpenCms
 * repository without the Workplace.<p>
 * 
 * The CmsShell has direct access to all methods in the "command objects".
 * Currently the following classes are used as command objects:
 * <code>{@link org.opencms.main.CmsShellCommands}</code>,
 * <code>{@link org.opencms.file.CmsRequestContext}</code> and
 * <code>{@link org.opencms.file.CmsObject}</code>.<p>
 * 
 * Only public methods in the command objects that use supported data types 
 * as parameters can be called from the shell. Supported data types are:
 * <code>String, {@link org.opencms.util.CmsUUID}, boolean, int, long, double, float</code>.<p>
 *
 * If a method name is ambiguous, i.e. the method name with the same numer of parameter exist 
 * in more then one of the command objects, the method is only executed on the first matching method object.<p>
 * 
 * @author Alexander Kandzior 
 * 
 * @version $Revision: 1.50 $ 
 * 
 * @since 6.0.0 
 * 
 * @see org.opencms.main.CmsShellCommands
 * @see org.opencms.file.CmsRequestContext
 * @see org.opencms.file.CmsObject
 */
public class CmsShell {

    /**
     * Command object class.<p>
     */
    private class CmsCommandObject {

        /** The list of methods. */
        private Map m_methods;

        /** The object to execute the methods on. */
        private Object m_object;

        /**
         * Creates a new command object.<p>
         * 
         * @param object the object to execute the methods on
         */
        protected CmsCommandObject(Object object) {

            m_object = object;
            initShellMethods();
        }

        /**
         * Tries to execute a method for the provided parameters on this command object.<p>
         * 
         * If methods with the same name and number of parameters exist in this command object,
         * the given parameters are tried to be converted from String to matching types.<p>
         * 
         * @param command the command entered by the user in the shell
         * @param parameters the parameters entered by the user in the shell
         * @return true if a method was executed, false otherwise
         */
        protected boolean executeMethod(String command, List parameters) {

            // TODO: ensure that publishmanager, oumanager and rolemanager methods are accessible
            int todo;

            // build the method lookup
            String lookup = buildMethodLookup(command, parameters.size());

            // try to look up the methods of this command object
            List possibleMethods = (List)m_methods.get(lookup);
            if (possibleMethods == null) {
                return false;
            }

            // a match for the mehod name was found, now try to figure out if the parameters are ok 
            Method onlyStringMethod = null;
            Method foundMethod = null;
            Object[] params = null;
            Iterator i;

            // first check if there is one method with only has String parameters, make this the fallback
            i = possibleMethods.iterator();
            while (i.hasNext()) {
                Method method = (Method)i.next();
                Class[] clazz = method.getParameterTypes();
                boolean onlyString = true;
                for (int j = 0; j < clazz.length; j++) {
                    if (!(clazz[j].equals(String.class))) {
                        onlyString = false;
                        break;
                    }
                }
                if (onlyString) {
                    onlyStringMethod = method;
                    break;
                }
            }

            // now check a method matches the provided parameters
            // if so, use this method, else continue searching
            i = possibleMethods.iterator();
            while (i.hasNext()) {
                Method method = (Method)i.next();
                if (method == onlyStringMethod) {
                    // skip the String only signature because this would always match
                    continue;
                }
                // now try to convert the parameters to the required types
                Class[] clazz = method.getParameterTypes();
                Object[] converted = new Object[clazz.length];
                boolean match = true;
                for (int j = 0; j < clazz.length; j++) {
                    String value = (String)parameters.get(j);
                    try {
                        converted[j] = CmsDataTypeUtil.parse(value, clazz[j]);
                    } catch (Throwable t) {
                        match = false;
                        break;
                    }
                }
                if (match) {
                    // we found a matching method signature
                    params = converted;
                    foundMethod = method;
                    break;
                }

            }

            if ((foundMethod == null) && (onlyStringMethod != null)) {
                // no match found but String only signature available, use this
                params = parameters.toArray();
                foundMethod = onlyStringMethod;
            }

            if ((params == null) || (foundMethod == null)) {
                // no match found at all
                return false;
            }

            // now try to invoke the method
            try {
                Object result = foundMethod.invoke(m_object, params);
                if (result != null) {
                    if (result instanceof Collection) {
                        Collection c = (Collection)result;
                        System.out.println(c.getClass().getName() + " (size: " + c.size() + ")");
                        int count = 0;
                        if (result instanceof Map) {
                            Map m = (Map)result;
                            Iterator j = m.entrySet().iterator();
                            while (j.hasNext()) {
                                Map.Entry entry = (Map.Entry)j.next();
                                System.out.println(count++ + ": " + entry.getKey() + "= " + entry.getValue());
                            }
                        } else {
                            Iterator j = c.iterator();
                            while (j.hasNext()) {
                                System.out.println(count++ + ": " + j.next());
                            }
                        }
                    } else {
                        System.out.println(result.toString());
                    }
                }
            } catch (InvocationTargetException ite) {
                System.out.println(Messages.get().getBundle(getLocale()).key(
                    Messages.GUI_SHELL_EXEC_METHOD_1,
                    new Object[] {foundMethod.getName()}));
                ite.getTargetException().printStackTrace(System.out);
            } catch (Throwable t) {
                System.out.println(Messages.get().getBundle(getLocale()).key(
                    Messages.GUI_SHELL_EXEC_METHOD_1,
                    new Object[] {foundMethod.getName()}));
                t.printStackTrace(System.out);
            }

            return true;
        }

        /**
         * Returns a signature overview of all methods containing the given search String.<p>
         * 
         * If no method name matches the given search String, the empty String is returned.<p>
         * 
         * @param searchString the String to search for, if null all methods are shown
         * @return a signature overview of all methods containing the given search String
         */
        protected String getMethodHelp(String searchString) {

            StringBuffer buf = new StringBuffer(512);
            Iterator i = m_methods.keySet().iterator();
            while (i.hasNext()) {
                List l = (List)m_methods.get(i.next());
                Iterator j = l.iterator();
                while (j.hasNext()) {
                    Method method = (Method)j.next();
                    if ((searchString == null)
                        || (method.getName().toLowerCase().indexOf(searchString.toLowerCase()) > -1)) {
                        buf.append("* ");
                        buf.append(method.getName());
                        buf.append("(");
                        Class[] params = method.getParameterTypes();
                        for (int k = 0; k < params.length; k++) {
                            String par = params[k].getName();
                            par = par.substring(par.lastIndexOf('.') + 1);
                            if (k != 0) {
                                buf.append(", ");
                            }
                            buf.append(par);
                        }