/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
/*
 * Copyright 2001-2004 The Apache Software Foundation.
 *
 * Licensed 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.
 */
/*
 * $Id: Transform.java,v 1.2.4.1 2005/09/12 09:07:33 pvedula Exp $
 */

package com.sun.org.apache.xalan.internal.xsltc.cmdline;

import java.io.FileNotFoundException;
import java.net.MalformedURLException;
import java.net.UnknownHostException;
import java.util.Vector;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.transform.sax.SAXSource;

import com.sun.org.apache.xalan.internal.xsltc.TransletException;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
import com.sun.org.apache.xalan.internal.xsltc.DOMEnhancedForDTM;
import com.sun.org.apache.xalan.internal.xsltc.dom.XSLTCDTMManager;
import com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet;
import com.sun.org.apache.xalan.internal.xsltc.runtime.Constants;
import com.sun.org.apache.xalan.internal.xsltc.runtime.Parameter;
import com.sun.org.apache.xalan.internal.xsltc.runtime.output.TransletOutputHandlerFactory;
import com.sun.org.apache.xml.internal.serializer.SerializationHandler;

import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;

import com.sun.org.apache.xalan.internal.xsltc.StripFilter;
import com.sun.org.apache.xml.internal.dtm.DTMWSFilter;
import com.sun.org.apache.xalan.internal.xsltc.dom.DOMWSFilter;

/**
 * @author Jacek Ambroziak
 * @author Santiago Pericas-Geertsen
 * @author G. Todd Miller
 * @author Morten Jorgensen
 */
final public class Transform {

    private SerializationHandler _handler;

    private String  _fileName;
    private String  _className;
    private String  _jarFileSrc;
    private boolean _isJarFileSpecified = false;
    private Vector  _params = null;
    private boolean _uri, _debug;
    private int     _iterations;

    public Transform(String className, String fileName,
                     boolean uri, boolean debug, int iterations) {
        _fileName = fileName;
        _className = className;
        _uri = uri;
        _debug = debug;
        _iterations = iterations;
  }

   public String getFileName(){return _fileName;}
   public String getClassName(){return _className;}

    public void setParameters(Vector params) {
        _params = params;
    }

    private void setJarFileInputSrc(boolean flag,  String jarFile) {
        // TODO: at this time we do not do anything with this
        // information, attempts to add the jarfile to the CLASSPATH
        // were successful via System.setProperty, but the effects
        // were not visible to the running JVM. For now we add jarfile
        // to CLASSPATH in the wrapper script that calls this program.
        _isJarFileSpecified = flag;
        // TODO verify jarFile exists...
        _jarFileSrc = jarFile;
    }

    private void doTransform() {
        try {
            final Class clazz = ObjectFactory.findProviderClass(
                _className, ObjectFactory.findClassLoader(), true);
            final AbstractTranslet translet = (AbstractTranslet)clazz.newInstance();
            translet.postInitialization();

            // Create a SAX parser and get the XMLReader object it uses
            final SAXParserFactory factory = SAXParserFactory.newInstance();
            try {
                factory.setFeature(Constants.NAMESPACE_FEATURE,true);
            }
            catch (Exception e) {
                factory.setNamespaceAware(true);
            }
            final SAXParser parser = factory.newSAXParser();
            final XMLReader reader = parser.getXMLReader();

            // Set the DOM's DOM builder as the XMLReader's SAX2 content handler
            XSLTCDTMManager dtmManager =
                (XSLTCDTMManager)XSLTCDTMManager.getDTMManagerClass()
                                                .newInstance();

            DTMWSFilter wsfilter;
            if (translet != null && translet instanceof StripFilter) {
                wsfilter = new DOMWSFilter(translet);
            } else {
                wsfilter = null;
            }

            final DOMEnhancedForDTM dom =
                   (DOMEnhancedForDTM)dtmManager.getDTM(
                            new SAXSource(reader, new InputSource(_fileName)),
                            false, wsfilter, true, false, translet.hasIdCall());

            dom.setDocumentURI(_fileName);
            translet.prepassDocument(dom);

            // Pass global parameters
            int n = _params.size();
            for (int i = 0; i < n; i++) {
                Parameter param = (Parameter) _params.elementAt(i);
                translet.addParameter(param._name, param._value);
            }

            // Transform the document
            TransletOutputHandlerFactory tohFactory =
                TransletOutputHandlerFactory.newInstance();
            tohFactory.setOutputType(TransletOutputHandlerFactory.STREAM);
            tohFactory.setEncoding(translet._encoding);
            tohFactory.setOutputMethod(translet._method);

            if (_iterations == -1) {
                translet.transform(dom, tohFactory.getSerializationHandler());
            }
            else if (_iterations > 0) {
                long mm = System.currentTimeMillis();
                for (int i = 0; i < _iterations; i++) {
                    translet.transform(dom,
                                       tohFactory.getSerializationHandler());
                }
                mm = System.currentTimeMillis() - mm;

                System.err.println("\n<!--");
                System.err.println("  transform  = "
                                   + (((double) mm) / ((double) _iterations))
                                   + " ms");
                System.err.println("  throughput = "
                                   + (1000.0 / (((double) mm)
                                                 / ((double) _iterations)))
                                   + " tps");
                System.err.println("-->");
            }
        }
        catch (TransletException e) {
            if (_debug) e.printStackTrace();
            System.err.println(new ErrorMsg(ErrorMsg.RUNTIME_ERROR_KEY)+
                   e.getMessage());
        }
        catch (RuntimeException e) {
            if (_debug) e.printStackTrace();
            System.err.println(new ErrorMsg(ErrorMsg.RUNTIME_ERROR_KEY)+
                               e.getMessage());
        }
        catch (FileNotFoundException e) {
            if (_debug) e.printStackTrace();
            ErrorMsg err = new ErrorMsg(ErrorMsg.FILE_NOT_FOUND_ERR, _fileName);
            System.err.println(new ErrorMsg(ErrorMsg.RUNTIME_ERROR_KEY)+
                               err.toString());
        }
        catch (MalformedURLException e) {
            if (_debug) e.printStackTrace();
            ErrorMsg err = new ErrorMsg(ErrorMsg.INVALID_URI_ERR, _fileName);
            System.err.println(new ErrorMsg(ErrorMsg.RUNTIME_ERROR_KEY)+
                               err.toString());
        }
        catch (ClassNotFoundException e) {
            if (_debug) e.printStackTrace();
            ErrorMsg err= new ErrorMsg(ErrorMsg.CLASS_NOT_FOUND_ERR,_className);
            System.err.println(new ErrorMsg(ErrorMsg.RUNTIME_ERROR_KEY)+
                               err.toString());
        }
        catch (UnknownHostException e) {
            if (_debug) e.printStackTrace();
            ErrorMsg err = new ErrorMsg(ErrorMsg.INVALID_URI_ERR, _fileName);
            System.err.println(new ErrorMsg(ErrorMsg.RUNTIME_ERROR_KEY)+
                               err.toString());
        }
        catch (SAXException e) {
            Exception ex = e.getException();
            if (_debug) {
                if (ex != null) ex.printStackTrace();
                e.printStackTrace();
            }
            System.err.print(new ErrorMsg(ErrorMsg.RUNTIME_ERROR_KEY));
            if (ex != null)
                System.err.println(ex.getMessage());
            else
                System.err.println(e.getMessage());
        }
        catch (Exception e) {
            if (_debug) e.printStackTrace();
            System.err.println(new ErrorMsg(ErrorMsg.RUNTIME_ERROR_KEY)+
                               e.getMessage());
        }
    }

    public static void printUsage() {
        System.err.println(new ErrorMsg(ErrorMsg.TRANSFORM_USAGE_STR));
    }

    public static void main(String[] args) {
        try {
            if (args.length > 0) {
                int i;
                int iterations = -1;
                boolean uri = false, debug = false;
                boolean isJarFileSpecified = false;
                String  jarFile = null;

                // Parse options starting with '-'
                for (i = 0; i < args.length && args[i].charAt(0) == '-'; i++) {
                    if (args[i].equals("-u")) {
                        uri = true;
                    }
                    else if (args[i].equals("-x")) {
                        debug = true;
                    }
                    else if (args[i].equals("-j")) {
                        isJarFileSpecified = true;
                        jarFile = args[++i];
                    }
                    else if (args[i].equals("-n")) {
                        try {
                            iterations = Integer.parseInt(args[++i]);
                        }
                        catch (NumberFormatException e) {
                            // ignore
                        }
                    }
                    else {
                        printUsage();
                    }
                }

                // Enough arguments left ?
                if (args.length - i < 2) printUsage();

                // Get document file and class name
                Transform handler = new Transform(args[i+1], args[i], uri,
                    debug, iterations);
                handler.setJarFileInputSrc(isJarFileSpecified,  jarFile);

                // Parse stylesheet parameters
                Vector params = new Vector();
                for (i += 2; i < args.length; i++) {
                    final int equal = args[i].indexOf('=');
                    if (equal > 0) {
                        final String name  = args[i].substring(0, equal);
                        final String value = args[i].substring(equal+1);
                        params.addElement(new Parameter(name, value));
                    }
                    else {
                        printUsage();
                    }
                }

                if (i == args.length) {
                    handler.setParameters(params);
                    handler.doTransform();
                }
            } else {
                printUsage();
            }
        }
        catch (Exception e) {
            e.printStackTrace();
        }
    }
}
