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

 /*

  * Copyright 2006 Sun Microsystems, Inc.  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.  Sun designates this

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

  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

  * CA 95054 USA or visit www.sun.com if you need additional information or

  * have any questions.

  */

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

 import java.io.IOException;

 import java.io.OutputStream;

 import javax.xml.stream.XMLStreamException;

 import com.sun.xml.internal.bind.DatatypeConverterImpl;

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

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

 import org.xml.sax.SAXException;

 /**

  * {@link XmlOutput} implementation specialized for UTF-8.

  *

  * @author Kohsuke Kawaguchi

  * @author Paul Sandoz

  */

 public class UTF8XmlOutput extends XmlOutputAbstractImpl {

     protected final OutputStream out;

     /** prefixes encoded. */

     private Encoded[] prefixes = new Encoded[8];

     /**

      * Of the {@link #prefixes}, number of filled entries.

      * This is almost the same as {@link NamespaceContextImpl#count()},

      * except that it allows us to handle contextual in-scope namespace bindings correctly.

      */

     private int prefixCount;

     /** local names encoded in UTF-8. All entries are pre-filled. */

     private final Encoded[] localNames;

     /** Temporary buffer used to encode text. */

     /*

      * TODO

      * The textBuffer could write directly to the _octetBuffer

      * when encoding a string if Encoder is modified.

      * This will avoid an additional memory copy.

      */

     private final Encoded textBuffer = new Encoded();

     /** Buffer of octets for writing. */

     // TODO: Obtain buffer size from property on the JAXB context

     protected final byte[] octetBuffer = new byte[1024];

     /** Index in buffer to write to. */

     protected int octetBufferIndex;

     /**

      * Set to true to indicate that we need to write '>'

      * to close a start tag. Deferring the write of this char

      * allows us to write "/>" for empty elements.

      */

     protected boolean closeStartTagPending = false;

     /**

      *

      * @param localNames

      *      local names encoded in UTF-8.

      */

     public UTF8XmlOutput(OutputStream out, Encoded[] localNames) {

         this.out = out;

         this.localNames = localNames;

         for( int i=0; i<prefixes.length; i++ )

             prefixes[i] = new Encoded();

     }

     @Override

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

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

         octetBufferIndex = 0;

         if(!fragment) {

             write(XML_DECL);

         }

     }

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

         flushBuffer();

         super.endDocument(fragment);

     }

     /**

      * Writes '>' to close the start tag, if necessary.

      */

     protected final void closeStartTag() throws IOException {

         if(closeStartTagPending) {

             write('>');

             closeStartTagPending = false;

         }

     }

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

         closeStartTag();

         int base= pushNsDecls();

         write('<');

         writeName(prefix,localName);

         writeNsDecls(base);

     }

     public void beginStartTag(Name name) throws IOException {

         closeStartTag();

         int base = pushNsDecls();

         write('<');

         writeName(name);

         writeNsDecls(base);

     }

     private int pushNsDecls() {

         int total = nsContext.count();

         NamespaceContextImpl.Element ns = nsContext.getCurrent();

         if(total > prefixes.length) {

             // reallocate

             int m = Math.max(total,prefixes.length*2);

             Encoded[] buf = new Encoded[m];

             System.arraycopy(prefixes,0,buf,0,prefixes.length);

             for( int i=prefixes.length; i<buf.length; i++ )

                 buf[i] = new Encoded();

             prefixes = buf;

         }

         int base = Math.min(prefixCount,ns.getBase());

         int size = nsContext.count();

         for( int i=base; i<size; i++ ) {

             String p = nsContext.getPrefix(i);

             Encoded e = prefixes[i];

             if(p.length()==0) {

                 e.buf = EMPTY_BYTE_ARRAY;

                 e.len = 0;

             } else {

                 e.set(p);

                 e.append(':');

             }

         }

         prefixCount = size;

         return base;

     }

     protected void writeNsDecls(int base) throws IOException {

         NamespaceContextImpl.Element ns = nsContext.getCurrent();

         int size = nsContext.count();

         for( int i=ns.getBase(); i<size; i++ )

             writeNsDecl(i);

     }

     /**

      * Writes a single namespace declaration for the specified prefix.

      */

     protected final void writeNsDecl(int prefixIndex) throws IOException {

         String p = nsContext.getPrefix(prefixIndex);

         if(p.length()==0) {

             if(nsContext.getCurrent().isRootElement()

             && nsContext.getNamespaceURI(prefixIndex).length()==0)

                 return;     // no point in declaring xmlns="" on the root element

             write(XMLNS_EQUALS);

         } else {

             Encoded e = prefixes[prefixIndex];

             write(XMLNS_COLON);

             write(e.buf,0,e.len-1); // skip the trailing ':'

             write(EQUALS);

         }

         doText(nsContext.getNamespaceURI(prefixIndex),true);

         write('\"');

     }

     private void writePrefix(int prefix) throws IOException {

         prefixes[prefix].write(this);

     }

     private void writeName(Name name) throws IOException {

         writePrefix(nsUriIndex2prefixIndex[name.nsUriIndex]);

         localNames[name.localNameIndex].write(this);

     }

     private void writeName(int prefix, String localName) throws IOException {

         writePrefix(prefix);

         textBuffer.set(localName);

         textBuffer.write(this);

     }

     @Override

     public void attribute(Name name, String value) throws IOException {

         write(' ');

         if(name.nsUriIndex==-1) {

             localNames[name.localNameIndex].write(this);

         } else

             writeName(name);

         write(EQUALS);

         doText(value,true);

         write('\"');

     }

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

         write(' ');

         if(prefix==-1) {

             textBuffer.set(localName);

             textBuffer.write(this);

         } else

             writeName(prefix,localName);

         write(EQUALS);

         doText(value,true);

         write('\"');

     }

     public void endStartTag() throws IOException {

         closeStartTagPending = true;

     }

     @Override

     public void endTag(Name name) throws IOException {

         if(closeStartTagPending) {

             write(EMPTY_TAG);

             closeStartTagPending = false;

         } else {

             write(CLOSE_TAG);

             writeName(name);

             write('>');

         }

     }

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

         if(closeStartTagPending) {

             write(EMPTY_TAG);

             closeStartTagPending = false;

         } else {

             write(CLOSE_TAG);

             writeName(prefix,localName);

             write('>');

         }

     }

     public void text(String value, boolean needSP) throws IOException {

         closeStartTag();

         if(needSP)

             write(' ');

         doText(value,false);

     }

     public void text(Pcdata value, boolean needSP) throws IOException {

         closeStartTag();

         if(needSP)

             write(' ');

         value.writeTo(this);

     }

     private void doText(String value,boolean isAttribute) throws IOException {

         textBuffer.setEscape(value,isAttribute);

         textBuffer.write(this);

     }

     public final void text(int value) throws IOException {

         closeStartTag();

         /*

          * TODO

          * Change to use the octet buffer directly

          */

         // max is -2147483648 and 11 digits

         boolean minus = (value<0);

         textBuffer.ensureSize(11);

         byte[] buf = textBuffer.buf;

         int idx = 11;

         do {

             int r = value%10;

             if(r<0) r = -r;

             buf[--idx] = (byte)('0'|r);    // really measn 0x30+r but 0<=r<10, so bit-OR would do.

             value /= 10;

         } while(value!=0);

         if(minus)   buf[--idx] = (byte)'-';

         write(buf,idx,11-idx);

     }

     /**

      * Writes the given byte[] as base64 encoded binary to the output.

      *

      * <p>

      * Being defined on this class allows this method to access the buffer directly,

      * which translates to a better performance.

      */

     public void text(byte[] data, int dataLen) throws IOException {

         closeStartTag();

         int start = 0;

         while(dataLen>0) {

             // how many bytes (in data) can we write without overflowing the buffer?

             int batchSize = Math.min(((octetBuffer.length-octetBufferIndex)/4)*3,dataLen);

             // write the batch

             octetBufferIndex = DatatypeConverterImpl._printBase64Binary(data,start,batchSize,octetBuffer,octetBufferIndex);

             if(batchSize<dataLen)

                 flushBuffer();

             start += batchSize;

             dataLen -= batchSize;

         }

     }

 //

 //

 // series of the write method that places bytes to the output

 // (by doing some buffering internal to this class)

 //

     /**

      * Writes one byte directly into the buffer.

      *

      * <p>

      * This method can be used somewhat like the {@code text} method,

      * but it doesn't perform character escaping.

      */

     public final void write(int i) throws IOException {

         if (octetBufferIndex < octetBuffer.length) {

             octetBuffer[octetBufferIndex++] = (byte)i;

         } else {

             out.write(octetBuffer);

             octetBufferIndex = 1;

             octetBuffer[0] = (byte)i;

         }

     }

     protected final void write(byte[] b) throws IOException {

         write(b, 0,  b.length);

     }

     protected final void write(byte[] b, int start, int length) throws IOException {

         if ((octetBufferIndex + length) < octetBuffer.length) {

             System.arraycopy(b, start, octetBuffer, octetBufferIndex, length);

             octetBufferIndex += length;

         } else {

             out.write(octetBuffer, 0, octetBufferIndex);

             out.write(b, start, length);

             octetBufferIndex = 0;

         }

     }

     protected final void flushBuffer() throws IOException {

         out.write(octetBuffer, 0, octetBufferIndex);

         octetBufferIndex = 0;

     }

     public void flush() throws IOException {

         flushBuffer();

         out.flush();

     }

     static byte[] toBytes(String s) {

         byte[] buf = new byte[s.length()];

         for( int i=s.length()-1; i>=0; i-- )

             buf[i] = (byte)s.charAt(i);

         return buf;

     }

     private static final byte[] XMLNS_EQUALS = toBytes(" xmlns=\"");

     private static final byte[] XMLNS_COLON = toBytes(" xmlns:");

     private static final byte[] EQUALS = toBytes("=\"");

     private static final byte[] CLOSE_TAG = toBytes("</");

     private static final byte[] EMPTY_TAG = toBytes("/>");

     private static final byte[] EMPTY_BYTE_ARRAY = new byte[0];

     private static final byte[] XML_DECL = toBytes("<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>");

 }