/*

 * 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: Util.java,v 1.2.4.1 2005/09/14 09:37:34 pvedula Exp $

 */

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

import java.io.InputStream;

import java.io.Reader;

import javax.xml.XMLConstants;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.parsers.SAXParser;

import javax.xml.parsers.SAXParserFactory;

import javax.xml.stream.XMLEventReader;

import javax.xml.stream.XMLStreamReader;

import javax.xml.transform.Source;

import javax.xml.transform.TransformerConfigurationException;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.sax.SAXSource;

import javax.xml.transform.stax.StAXResult;

import javax.xml.transform.stax.StAXSource;

import javax.xml.transform.stream.StreamSource;

import com.sun.org.apache.xalan.internal.xsltc.compiler.XSLTC;

import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;

import org.w3c.dom.Document;

import org.xml.sax.InputSource;

import org.xml.sax.SAXException;

import org.xml.sax.SAXNotRecognizedException;

import org.xml.sax.SAXNotSupportedException;

import org.xml.sax.XMLReader;

import org.xml.sax.helpers.XMLReaderFactory;

/**

 * @author Santiago Pericas-Geertsen

 */

public final class Util {

    public static String baseName(String name) {

        return com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util.baseName(name);

    }

    public static String noExtName(String name) {

        return com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util.noExtName(name);

    }

    public static String toJavaName(String name) {

        return com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util.toJavaName(name);

    }

    /**

     * Creates a SAX2 InputSource object from a TrAX Source object

     */

    public static InputSource getInputSource(XSLTC xsltc, Source source)

        throws TransformerConfigurationException

    {

        InputSource input = null;

        String systemId = source.getSystemId();

        try {

            // Try to get InputSource from SAXSource input

            if (source instanceof SAXSource) {

                final SAXSource sax = (SAXSource)source;

                input = sax.getInputSource();

                // Pass the SAX parser to the compiler

                try {

                    XMLReader reader = sax.getXMLReader();

                     /*

                      * Fix for bug 24695

                      * According to JAXP 1.2 specification if a SAXSource

                      * is created using a SAX InputSource the Transformer or

                      * TransformerFactory creates a reader via the

                      * XMLReaderFactory if setXMLReader is not used

                      */

                    if (reader == null) {

                       try {

                           reader= XMLReaderFactory.createXMLReader();

                       } catch (Exception e ) {

                           try {

                               //Incase there is an exception thrown

                               // resort to JAXP

                               parserFactory.setNamespaceAware(true);

                               if (xsltc.isSecureProcessing()) {

                                  try {

                                      parserFactory.setFeature(

                                          XMLConstants.FEATURE_SECURE_PROCESSING, true);

                                  }

                                  catch (org.xml.sax.SAXException se) {}

                               }

                               reader = parserFactory.newSAXParser()

                                     .getXMLReader();

                           } catch (ParserConfigurationException pce ) {

                               throw new TransformerConfigurationException

                                 ("ParserConfigurationException" ,pce);

                           }

                       }

                    }

                    reader.setFeature

                        ("http://xml.org/sax/features/namespaces",true);

                    reader.setFeature

                        ("http://xml.org/sax/features/namespace-prefixes",false);

                    xsltc.setXMLReader(reader);

                }catch (SAXNotRecognizedException snre ) {

                  throw new TransformerConfigurationException

                       ("SAXNotRecognizedException ",snre);

                }catch (SAXNotSupportedException snse ) {

                  throw new TransformerConfigurationException

                       ("SAXNotSupportedException ",snse);

                }catch (SAXException se ) {

                  throw new TransformerConfigurationException

                       ("SAXException ",se);

                }

            }

            // handle  DOMSource

            else if (source instanceof DOMSource) {

                final DOMSource domsrc = (DOMSource)source;

                final Document dom = (Document)domsrc.getNode();

                final DOM2SAX dom2sax = new DOM2SAX(dom);

                xsltc.setXMLReader(dom2sax);

                // Try to get SAX InputSource from DOM Source.

                input = SAXSource.sourceToInputSource(source);

                if (input == null){

                    input = new InputSource(domsrc.getSystemId());

                }

            }

            // handle StAXSource

            else if (source instanceof StAXSource) {

                final StAXSource staxSource = (StAXSource)source;

                StAXEvent2SAX staxevent2sax = null;

                StAXStream2SAX staxStream2SAX = null;

                if (staxSource.getXMLEventReader() != null) {

                    final XMLEventReader xmlEventReader = staxSource.getXMLEventReader();

                    staxevent2sax = new StAXEvent2SAX(xmlEventReader);

                    xsltc.setXMLReader(staxevent2sax);

                } else if (staxSource.getXMLStreamReader() != null) {

                    final XMLStreamReader xmlStreamReader = staxSource.getXMLStreamReader();

                    staxStream2SAX = new StAXStream2SAX(xmlStreamReader);

                    xsltc.setXMLReader(staxStream2SAX);

                }

                // get sax InputSource from StAXSource

                input = SAXSource.sourceToInputSource(source);

                if (input == null){

                    input = new InputSource(staxSource.getSystemId());

                }

            }

            // Try to get InputStream or Reader from StreamSource

            else if (source instanceof StreamSource) {

                final StreamSource stream = (StreamSource)source;

                final InputStream istream = stream.getInputStream();

                final Reader reader = stream.getReader();

                xsltc.setXMLReader(null);     // Clear old XML reader

                // Create InputSource from Reader or InputStream in Source

                if (istream != null) {

                    input = new InputSource(istream);

                }

                else if (reader != null) {

                    input = new InputSource(reader);

                }

                else {

                    input = new InputSource(systemId);

                }

            }

            else {

                ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_UNKNOWN_SOURCE_ERR);

                throw new TransformerConfigurationException(err.toString());

            }

            input.setSystemId(systemId);

        }

        catch (NullPointerException e) {

            ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_NO_SOURCE_ERR,

                                        "TransformerFactory.newTemplates()");

            throw new TransformerConfigurationException(err.toString());

        }

        catch (SecurityException e) {

            ErrorMsg err = new ErrorMsg(ErrorMsg.FILE_ACCESS_ERR, systemId);

            throw new TransformerConfigurationException(err.toString());

        }

        return input;

    }

}