| /* |
| * Copyright (c) 1997, 2012, 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.xml.internal.bind.v2.runtime.unmarshaller; |
| |
| import javax.xml.stream.Location; |
| import javax.xml.stream.XMLStreamConstants; |
| import javax.xml.stream.XMLStreamException; |
| |
| import com.sun.xml.internal.bind.WhiteSpaceProcessor; |
| import com.sun.xml.internal.fastinfoset.stax.StAXDocumentParser; |
| import com.sun.xml.internal.org.jvnet.fastinfoset.EncodingAlgorithmIndexes; |
| import org.xml.sax.SAXException; |
| |
| /** |
| * Reads from FastInfoset StAX parser and feeds into JAXB Unmarshaller. |
| * <p> |
| * This class will peek at future events to ascertain if characters need to be |
| * buffered or not. |
| * |
| * @author Paul Sandoz. |
| */ |
| final class FastInfosetConnector extends StAXConnector { |
| |
| // event source |
| private final StAXDocumentParser fastInfosetStreamReader; |
| |
| // Flag set to true if text has been reported |
| private boolean textReported; |
| |
| // Buffer for octets |
| private final Base64Data base64Data = new Base64Data(); |
| |
| // Buffer for characters |
| private final StringBuilder buffer = new StringBuilder(); |
| |
| public FastInfosetConnector(StAXDocumentParser fastInfosetStreamReader, |
| XmlVisitor visitor) { |
| super(visitor); |
| fastInfosetStreamReader.setStringInterning(true); |
| this.fastInfosetStreamReader = fastInfosetStreamReader; |
| } |
| |
| public void bridge() throws XMLStreamException { |
| try { |
| // remembers the nest level of elements to know when we are done. |
| int depth=0; |
| |
| // if the parser is at the start tag, proceed to the first element |
| int event = fastInfosetStreamReader.getEventType(); |
| if(event == XMLStreamConstants.START_DOCUMENT) { |
| // nextTag doesn't correctly handle DTDs |
| while( !fastInfosetStreamReader.isStartElement() ) |
| event = fastInfosetStreamReader.next(); |
| } |
| |
| |
| if( event!=XMLStreamConstants.START_ELEMENT) |
| throw new IllegalStateException("The current event is not START_ELEMENT\n but " + event); |
| |
| // TODO: we don't have to rely on this hack --- we can just emulate |
| // start/end prefix mappings. But for now, I'll rely on this hack. |
| handleStartDocument(fastInfosetStreamReader.getNamespaceContext()); |
| |
| OUTER: |
| while(true) { |
| // These are all of the events listed in the javadoc for |
| // XMLEvent. |
| // The spec only really describes 11 of them. |
| switch (event) { |
| case XMLStreamConstants.START_ELEMENT : |
| handleStartElement(); |
| depth++; |
| break; |
| case XMLStreamConstants.END_ELEMENT : |
| depth--; |
| handleEndElement(); |
| if(depth==0) break OUTER; |
| break; |
| case XMLStreamConstants.CHARACTERS : |
| case XMLStreamConstants.CDATA : |
| case XMLStreamConstants.SPACE : |
| if (predictor.expectText()) { |
| // Peek at the next event to see if there are |
| // fragmented characters |
| event = fastInfosetStreamReader.peekNext(); |
| if (event == XMLStreamConstants.END_ELEMENT) |
| processNonIgnorableText(); |
| else if (event == XMLStreamConstants.START_ELEMENT) |
| processIgnorableText(); |
| else |
| handleFragmentedCharacters(); |
| } |
| break; |
| // otherwise simply ignore |
| } |
| |
| event=fastInfosetStreamReader.next(); |
| } |
| |
| fastInfosetStreamReader.next(); // move beyond the end tag. |
| |
| handleEndDocument(); |
| } catch (SAXException e) { |
| throw new XMLStreamException(e); |
| } |
| } |
| |
| protected Location getCurrentLocation() { |
| return fastInfosetStreamReader.getLocation(); |
| } |
| |
| protected String getCurrentQName() { |
| return fastInfosetStreamReader.getNameString(); |
| } |
| |
| private void handleStartElement() throws SAXException { |
| processUnreportedText(); |
| |
| for (int i = 0; i < fastInfosetStreamReader.accessNamespaceCount(); i++) { |
| visitor.startPrefixMapping(fastInfosetStreamReader.getNamespacePrefix(i), |
| fastInfosetStreamReader.getNamespaceURI(i)); |
| } |
| |
| tagName.uri = fastInfosetStreamReader.accessNamespaceURI(); |
| tagName.local = fastInfosetStreamReader.accessLocalName(); |
| tagName.atts = fastInfosetStreamReader.getAttributesHolder(); |
| |
| visitor.startElement(tagName); |
| } |
| |
| private void handleFragmentedCharacters() throws XMLStreamException, SAXException { |
| buffer.setLength(0); |
| |
| // Append characters of first character event |
| buffer.append(fastInfosetStreamReader.getTextCharacters(), |
| fastInfosetStreamReader.getTextStart(), |
| fastInfosetStreamReader.getTextLength()); |
| |
| // Consume all character |
| while(true) { |
| switch(fastInfosetStreamReader.peekNext()) { |
| case XMLStreamConstants.START_ELEMENT : |
| processBufferedText(true); |
| return; |
| case XMLStreamConstants.END_ELEMENT : |
| processBufferedText(false); |
| return; |
| case XMLStreamConstants.CHARACTERS : |
| case XMLStreamConstants.CDATA : |
| case XMLStreamConstants.SPACE : |
| // Append characters of second and subsequent character events |
| fastInfosetStreamReader.next(); |
| buffer.append(fastInfosetStreamReader.getTextCharacters(), |
| fastInfosetStreamReader.getTextStart(), |
| fastInfosetStreamReader.getTextLength()); |
| break; |
| default: |
| fastInfosetStreamReader.next(); |
| } |
| } |
| } |
| |
| private void handleEndElement() throws SAXException { |
| processUnreportedText(); |
| |
| tagName.uri = fastInfosetStreamReader.accessNamespaceURI(); |
| tagName.local = fastInfosetStreamReader.accessLocalName(); |
| |
| visitor.endElement(tagName); |
| |
| for (int i = fastInfosetStreamReader.accessNamespaceCount() - 1; i >= 0; i--) { |
| visitor.endPrefixMapping(fastInfosetStreamReader.getNamespacePrefix(i)); |
| } |
| } |
| |
| final private class CharSequenceImpl implements CharSequence { |
| char[] ch; |
| int start; |
| int length; |
| |
| CharSequenceImpl() { |
| } |
| |
| CharSequenceImpl(final char[] ch, final int start, final int length) { |
| this.ch = ch; |
| this.start = start; |
| this.length = length; |
| } |
| |
| public void set() { |
| ch = fastInfosetStreamReader.getTextCharacters(); |
| start = fastInfosetStreamReader.getTextStart(); |
| length = fastInfosetStreamReader.getTextLength(); |
| } |
| |
| // CharSequence interface |
| |
| public final int length() { |
| return length; |
| } |
| |
| public final char charAt(final int index) { |
| return ch[start + index]; |
| } |
| |
| public final CharSequence subSequence(final int start, final int end) { |
| return new CharSequenceImpl(ch, this.start + start, end - start); |
| } |
| |
| public String toString() { |
| return new String(ch, start, length); |
| } |
| } |
| |
| final private CharSequenceImpl charArray = new CharSequenceImpl(); |
| |
| private void processNonIgnorableText() throws SAXException { |
| textReported = true; |
| boolean isTextAlgorithmAplied = |
| (fastInfosetStreamReader.getTextAlgorithmBytes() != null); |
| |
| if (isTextAlgorithmAplied && |
| fastInfosetStreamReader.getTextAlgorithmIndex() == EncodingAlgorithmIndexes.BASE64) { |
| base64Data.set(fastInfosetStreamReader.getTextAlgorithmBytesClone(),null); |
| visitor.text(base64Data); |
| } else { |
| if (isTextAlgorithmAplied) { |
| fastInfosetStreamReader.getText(); |
| } |
| |
| charArray.set(); |
| visitor.text(charArray); |
| } |
| } |
| |
| private void processIgnorableText() throws SAXException { |
| boolean isTextAlgorithmAplied = |
| (fastInfosetStreamReader.getTextAlgorithmBytes() != null); |
| |
| if (isTextAlgorithmAplied && |
| fastInfosetStreamReader.getTextAlgorithmIndex() == EncodingAlgorithmIndexes.BASE64) { |
| base64Data.set(fastInfosetStreamReader.getTextAlgorithmBytesClone(),null); |
| visitor.text(base64Data); |
| textReported = true; |
| } else { |
| if (isTextAlgorithmAplied) { |
| fastInfosetStreamReader.getText(); |
| } |
| |
| charArray.set(); |
| if (!WhiteSpaceProcessor.isWhiteSpace(charArray)) { |
| visitor.text(charArray); |
| textReported = true; |
| } |
| } |
| } |
| |
| private void processBufferedText(boolean ignorable) throws SAXException { |
| if (!ignorable || !WhiteSpaceProcessor.isWhiteSpace(buffer)) { |
| visitor.text(buffer); |
| textReported = true; |
| } |
| } |
| |
| private void processUnreportedText() throws SAXException { |
| if(!textReported && predictor.expectText()) { |
| visitor.text(""); |
| } |
| textReported = false; |
| } |
| } |