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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/xml/dom/ls/FilteredSAXEventSink.java | |
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Diffstat (limited to 'libjava/classpath/gnu/xml/dom/ls/FilteredSAXEventSink.java')
-rw-r--r-- | libjava/classpath/gnu/xml/dom/ls/FilteredSAXEventSink.java | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/xml/dom/ls/FilteredSAXEventSink.java b/libjava/classpath/gnu/xml/dom/ls/FilteredSAXEventSink.java new file mode 100644 index 000000000..65c1d37a4 --- /dev/null +++ b/libjava/classpath/gnu/xml/dom/ls/FilteredSAXEventSink.java @@ -0,0 +1,353 @@ +/* FilteredSAXEventSink.java -- + Copyright (C) 1999,2000,2001 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.xml.dom.ls; + +import java.util.LinkedList; +import org.w3c.dom.Attr; +import org.w3c.dom.Element; +import org.w3c.dom.Node; +import org.w3c.dom.Text; +import org.w3c.dom.ls.LSParserFilter; +import org.w3c.dom.traversal.NodeFilter; +import org.xml.sax.Attributes; +import org.xml.sax.SAXException; + +/** + * A SAX event sink that calls out to a parser filter in order to decide + * whether to insert nodes into the tree. + * + * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> + */ +class FilteredSAXEventSink + extends SAXEventSink +{ + + final LSParserFilter filter; + final int whatToShow; + + /** + * Stack of elements to insert. + */ + LinkedList nodes; + + /** + * Corresponding stack of filter decisions about the nodes. + */ + LinkedList decisions; + + /** + * True when rejecting child nodes. + */ + boolean rejecting; + + FilteredSAXEventSink(LSParserFilter filter) + { + this.filter = filter; + whatToShow = filter.getWhatToShow(); + } + + public void startDocument() + throws SAXException + { + if (interrupted) + { + return; + } + nodes = new LinkedList(); + decisions = new LinkedList(); + + super.startDocument(); + } + + public void endDocument() + throws SAXException + { + if (interrupted) + { + return; + } + super.endDocument(); + + switch (getDecision(ctx, false)) + { + case LSParserFilter.FILTER_REJECT: + ctx = null; + doc = null; + break; + } + + nodes = null; + decisions = null; + } + + public void startElement(String uri, String localName, String qName, + Attributes atts) + throws SAXException + { + if (rejecting || interrupted) + { + return; + } + Element element = createElement(uri, localName, qName, atts); + ctx = element; + + short decision = getDecision(element, true); + nodes.addLast(element); + decisions.addLast(new Short(decision)); + + switch (decision) + { + case LSParserFilter.FILTER_REJECT: + rejecting = true; + break; + case LSParserFilter.FILTER_INTERRUPT: + interrupted = true; + break; + } + } + + protected Attr createAttr(Attributes atts, int index) + { + Attr attr = super.createAttr(atts, index); + short decision = getDecision(attr, false); + switch (decision) + { + case LSParserFilter.FILTER_REJECT: + return null; + case LSParserFilter.FILTER_INTERRUPT: + interrupted = true; + return null; + } + return attr; + } + + public void endElement(String uri, String localName, String qName) + throws SAXException + { + if (rejecting || interrupted) + { + return; + } + super.endElement(uri, localName, qName); + + Element element = (Element) nodes.removeLast(); + Node parent = nodes.isEmpty() ? doc : (Node) nodes.getLast(); + ctx = parent; + short decision = ((Short) decisions.removeLast()).shortValue(); + switch (decision) + { + case LSParserFilter.FILTER_SKIP: + // Add all children of element to parent + for (Node child = element.getFirstChild(); child != null; + child = child.getNextSibling()) + { + parent.insertBefore(child, element); + } + return; + case LSParserFilter.FILTER_REJECT: + rejecting = false; + break; + } + decision = getDecision(element, false); + switch (decision) + { + case LSParserFilter.FILTER_ACCEPT: + parent.appendChild(element); + break; + case LSParserFilter.FILTER_INTERRUPT: + interrupted = true; + break; + } + } + + public void characters(char[] c, int off, int len) + throws SAXException + { + if (rejecting || interrupted) + { + return; + } + Text text = createText(c, off, len); + short decision = getDecision(text, false); + switch (decision) + { + case LSParserFilter.FILTER_ACCEPT: + ctx.appendChild(text); + break; + case LSParserFilter.FILTER_INTERRUPT: + interrupted = true; + break; + } + } + + public void processingInstruction(String target, String data) + throws SAXException + { + if (rejecting || interrupted || inDTD) + { + return; + } + Node pi = createProcessingInstruction(target, data); + short decision = getDecision(pi, false); + switch (decision) + { + case LSParserFilter.FILTER_ACCEPT: + ctx.appendChild(pi); + break; + case LSParserFilter.FILTER_INTERRUPT: + interrupted = true; + break; + } + } + + public void startDTD(String name, String publicId, String systemId) + throws SAXException + { + if (interrupted) + { + return; + } + Node doctype = createDocumentType(name, publicId, systemId); + ctx = doctype; + inDTD = true; + nodes.addLast(doctype); + decisions.addLast(new Short(LSParserFilter.FILTER_ACCEPT)); + } + + public void endDTD() + throws SAXException + { + if (interrupted) + { + return; + } + Node doctype = (Node) nodes.removeLast(); + decisions.removeLast(); + inDTD = false; + ctx = doc; + short decision = getDecision(doctype, false); + switch (decision) + { + case LSParserFilter.FILTER_ACCEPT: + ctx.appendChild(doctype); + break; + case LSParserFilter.FILTER_INTERRUPT: + interrupted = true; + break; + } + } + + public void comment(char[] c, int off, int len) + throws SAXException + { + if (rejecting || interrupted || inDTD) + { + return; + } + Node comment = createComment(c, off, len); + short decision = getDecision(comment, false); + switch (decision) + { + case LSParserFilter.FILTER_ACCEPT: + ctx.appendChild(comment); + break; + case LSParserFilter.FILTER_INTERRUPT: + interrupted = true; + break; + } + } + + // TODO declarations + + short getDecision(Node node, boolean start) + { + boolean show = (whatToShow == NodeFilter.SHOW_ALL); + if (!show) + { + switch (node.getNodeType()) + { + case Node.ATTRIBUTE_NODE: + show = ((whatToShow & NodeFilter.SHOW_ATTRIBUTE) != 0); + break; + case Node.TEXT_NODE: + show = ((whatToShow & NodeFilter.SHOW_TEXT) != 0); + break; + case Node.CDATA_SECTION_NODE: + show = ((whatToShow & NodeFilter.SHOW_CDATA_SECTION) != 0); + break; + case Node.ELEMENT_NODE: + show = ((whatToShow & NodeFilter.SHOW_ELEMENT) != 0); + break; + case Node.COMMENT_NODE: + show = ((whatToShow & NodeFilter.SHOW_COMMENT) != 0); + break; + case Node.DOCUMENT_NODE: + show = ((whatToShow & NodeFilter.SHOW_DOCUMENT) != 0); + break; + case Node.PROCESSING_INSTRUCTION_NODE: + show = ((whatToShow & NodeFilter.SHOW_PROCESSING_INSTRUCTION) != 0); + break; + case Node.DOCUMENT_FRAGMENT_NODE: + show = ((whatToShow & NodeFilter.SHOW_DOCUMENT_FRAGMENT) != 0); + break; + case Node.DOCUMENT_TYPE_NODE: + show = ((whatToShow & NodeFilter.SHOW_DOCUMENT_TYPE) != 0); + break; + case Node.ENTITY_REFERENCE_NODE: + show = ((whatToShow & NodeFilter.SHOW_ENTITY_REFERENCE) != 0); + break; + case Node.ENTITY_NODE: + show = ((whatToShow & NodeFilter.SHOW_ENTITY) != 0); + break; + case Node.NOTATION_NODE: + show = ((whatToShow & NodeFilter.SHOW_NOTATION) != 0); + break; + } + } + if (!show) + { + return LSParserFilter.FILTER_ACCEPT; + } + if (start) + { + return filter.startElement((Element) node); + } + return filter.acceptNode(node); + } + +} |