Mercurial > jdk8-mips64-public > jaxws / file revision

 /*

  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.  Oracle designates this

  * particular file as subject to the "Classpath" exception as provided

  * by Oracle in the LICENSE file that accompanied this code.

  *

  * This code 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 General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 package com.sun.xml.internal.bind.v2.runtime.output;

 import java.io.IOException;

 import java.lang.reflect.Constructor;

 import javax.xml.stream.XMLStreamException;

 import javax.xml.stream.XMLStreamWriter;

 import com.sun.xml.internal.bind.v2.runtime.JAXBContextImpl;

 import com.sun.xml.internal.bind.v2.runtime.XMLSerializer;

 import com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl;

 import org.xml.sax.SAXException;

 /**

  * {@link XmlOutput} that writes to StAX {@link XMLStreamWriter}.

  * <p>

  * TODO:

  * Finding the optimized FI implementations is a bit hacky and not very

  * extensible. Can we use the service provider mechanism in general for

  * concrete implementations of XmlOutputAbstractImpl.

  *

  * @author Kohsuke Kawaguchi

  */

 public class XMLStreamWriterOutput extends XmlOutputAbstractImpl {

     /**

      * Creates a new {@link XmlOutput} from a {@link XMLStreamWriter}.

      * This method recognizes an FI StAX writer.

      */

     public static XmlOutput create(XMLStreamWriter out, JAXBContextImpl context) {

         // try optimized path

         final Class writerClass = out.getClass();

         if (writerClass==FI_STAX_WRITER_CLASS) {

             try {

                 return FI_OUTPUT_CTOR.newInstance(out, context);

             } catch (Exception e) {

             }

         }

         if (STAXEX_WRITER_CLASS!=null && STAXEX_WRITER_CLASS.isAssignableFrom(writerClass)) {

             try {

                 return STAXEX_OUTPUT_CTOR.newInstance(out);

             } catch (Exception e) {

             }

         }

         // otherwise the normal writer.

         return new XMLStreamWriterOutput(out);

     }

     private final XMLStreamWriter out;

     protected final char[] buf = new char[256];

     protected XMLStreamWriterOutput(XMLStreamWriter out) {

         this.out = out;

     }

     // not called if we are generating fragments

     @Override

     public void startDocument(XMLSerializer serializer, boolean fragment, int[] nsUriIndex2prefixIndex, NamespaceContextImpl nsContext) throws IOException, SAXException, XMLStreamException {

         super.startDocument(serializer, fragment,nsUriIndex2prefixIndex,nsContext);

         if(!fragment)

             out.writeStartDocument();

     }

     @Override

     public void endDocument(boolean fragment) throws IOException, SAXException, XMLStreamException {

         if(!fragment) {

             out.writeEndDocument();

             out.flush();

         }

         super.endDocument(fragment);

     }

     public void beginStartTag(int prefix, String localName) throws IOException, XMLStreamException {

         out.writeStartElement(

             nsContext.getPrefix(prefix),

             localName,

             nsContext.getNamespaceURI(prefix));

         NamespaceContextImpl.Element nse = nsContext.getCurrent();

         if(nse.count()>0) {

             for( int i=nse.count()-1; i>=0; i-- ) {

                 String uri = nse.getNsUri(i);

                 if(uri.length()==0 && nse.getBase()==1)

                     continue;   // no point in definint xmlns='' on the root

                 out.writeNamespace(nse.getPrefix(i),uri);

             }

         }

     }

     public void attribute(int prefix, String localName, String value) throws IOException, XMLStreamException {

         if(prefix==-1)

             out.writeAttribute(localName,value);

         else

             out.writeAttribute(

                     nsContext.getPrefix(prefix),

                     nsContext.getNamespaceURI(prefix),

                     localName, value);

     }

     public void endStartTag() throws IOException, SAXException {

         // noop

     }

     public void endTag(int prefix, String localName) throws IOException, SAXException, XMLStreamException {

         out.writeEndElement();

     }

     public void text(String value, boolean needsSeparatingWhitespace) throws IOException, SAXException, XMLStreamException {

         if(needsSeparatingWhitespace)

             out.writeCharacters(" ");

         out.writeCharacters(value);

     }

     public void text(Pcdata value, boolean needsSeparatingWhitespace) throws IOException, SAXException, XMLStreamException {

         if(needsSeparatingWhitespace)

             out.writeCharacters(" ");

         int len = value.length();

         if(len <buf.length) {

             value.writeTo(buf,0);

             out.writeCharacters(buf,0,len);

         } else {

             out.writeCharacters(value.toString());

         }

     }

     /**

      * Reference to FI's XMLStreamWriter class, if FI can be loaded.

      */

     private static final Class FI_STAX_WRITER_CLASS = initFIStAXWriterClass();

     private static final Constructor<? extends XmlOutput> FI_OUTPUT_CTOR = initFastInfosetOutputClass();

     private static Class initFIStAXWriterClass() {

         try {

             ClassLoader loader = getClassLoader();

             Class llfisw = Class.forName("com.sun.xml.internal.org.jvnet.fastinfoset.stax.LowLevelFastInfosetStreamWriter", true, loader);

             Class sds = loader.loadClass("com.sun.xml.internal.fastinfoset.stax.StAXDocumentSerializer");

             // Check if StAXDocumentSerializer implements LowLevelFastInfosetStreamWriter

             if (llfisw.isAssignableFrom(sds))

                 return sds;

             else

                 return null;

         } catch (Throwable e) {

             return null;

         }

     }

     private static Constructor<? extends XmlOutput> initFastInfosetOutputClass() {

         try {

             if (FI_STAX_WRITER_CLASS == null)

                 return null;

             ClassLoader loader = getClassLoader();

             Class c = Class.forName("com.sun.xml.internal.bind.v2.runtime.output.FastInfosetStreamWriterOutput", true, loader);

             return c.getConstructor(FI_STAX_WRITER_CLASS, JAXBContextImpl.class);

         } catch (Throwable e) {

             return null;

         }

     }

     //

     // StAX-ex

     //

     private static final Class STAXEX_WRITER_CLASS = initStAXExWriterClass();

     private static final Constructor<? extends XmlOutput> STAXEX_OUTPUT_CTOR = initStAXExOutputClass();

     private static Class initStAXExWriterClass() {

         try {

             ClassLoader loader = getClassLoader();

             return Class.forName("com.sun.xml.internal.org.jvnet.staxex.XMLStreamWriterEx",true,loader);

         } catch (Throwable e) {

             return null;

         }

     }

     private static Constructor<? extends XmlOutput> initStAXExOutputClass() {

         try {

             ClassLoader loader = getClassLoader();

             Class c = Class.forName("com.sun.xml.internal.bind.v2.runtime.output.StAXExStreamWriterOutput",true, loader);

             return c.getConstructor(STAXEX_WRITER_CLASS);

         } catch (Throwable e) {

             return null;

         }

     }

     private static ClassLoader getClassLoader() {

         ClassLoader cl = SecureLoader.getClassClassLoader(UnmarshallerImpl.class);

         if (cl == null) {

             cl = SecureLoader.getContextClassLoader();

         }

         return cl;

     }

 }