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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/Consumer.java | |
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Diffstat (limited to 'libjava/classpath/gnu/xml/dom/Consumer.java')
-rw-r--r-- | libjava/classpath/gnu/xml/dom/Consumer.java | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/xml/dom/Consumer.java b/libjava/classpath/gnu/xml/dom/Consumer.java new file mode 100644 index 000000000..836c8d257 --- /dev/null +++ b/libjava/classpath/gnu/xml/dom/Consumer.java @@ -0,0 +1,352 @@ +/* Consumer.java -- + Copyright (C) 2001,2004 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; + +import org.w3c.dom.DocumentType; +import org.w3c.dom.Node; +import org.w3c.dom.Text; + +import org.xml.sax.Attributes; +import org.xml.sax.SAXException; +import org.xml.sax.ext.Attributes2; + +import gnu.xml.pipeline.DomConsumer; +import gnu.xml.pipeline.EventConsumer; + + +/** + * Event consumer which constructs DOM documents using the implementation + * in this package, using SAX2 events. This packages various backdoors + * into this DOM implementation, as needed to address DOM requirements + * that can't be met by strictly conforming implementations of DOM. + * + * <p> These requirements all relate to {@link DocumentType} nodes and + * features of that node type. These features are normally not used, + * because that interface only exposes a subset of the information found + * in DTDs. More, that subset does not include the most important typing + * information. For example, it excludes element content models and + * attribute typing. It does expose some entity management issues, + * although entity management doesn't relate to document typing. + * + * <p> Note that SAX2 does not expose the literal text of the DTD's + * internal subset, so it will not be present in DOM trees constructed + * using this API. (Though with a good SAX2 implementation, it could + * be partially recreated...) + * + * @author David Brownell + */ +public class Consumer extends DomConsumer +{ + /** + * Constructs an unconfigured event consumer, + * as a terminus in a SAX event pipeline. + */ + // used by PipelineFactory [terminus] + public Consumer () + throws SAXException + { + super (DomDocument.class); + setHandler (new Backdoor (this)); + } + + /** + * Constructs an unconfigured event consumer, + * as a stage in a SAX event pipeline. + */ + // used by PipelineFactory [filter] + public Consumer (EventConsumer next) + throws SAXException + { + super (DomDocument.class, next); + setHandler (new Backdoor (this)); + } + + /** + * Implements the backdoors needed by DOM. + * All methods in this class use implementation-specific APIs that are + * implied by the DOM specification (needed to implement testable + * behavior) but which are excluded from the DOM specification. + */ + public static class Backdoor extends DomConsumer.Handler + { + /** + * Constructor. + * @param consumer must have been initialized to use the + * {@link DomDocument} class (or a subclass) for + * constructing DOM trees + */ + protected Backdoor (DomConsumer consumer) + throws SAXException + { super (consumer); } + + // helper routine + private DomDoctype getDoctype () + throws SAXException + { + DomDocument doc = (DomDocument) getDocument (); + DocumentType dt = doc.getDoctype (); + + if (dt == null) + throw new SAXException ("doctype missing!"); + return (DomDoctype) dt; + } + + // SAX2 "lexical" event + public void startDTD (String name, String publicId, String systemId) + throws SAXException + { + DomDocument doc = (DomDocument) getDocument (); + + super.startDTD (name, publicId, systemId); + // DOM L2 doctype creation model is bizarre + DomDoctype dt = new DomDoctype (doc, name, publicId, systemId); + doc.appendChild (dt); + } + + // SAX2 "lexical" event + public void endDTD () + throws SAXException + { + super.endDTD (); + // DOM L2 has no way to make things readonly + getDoctype ().makeReadonly (); + } + + // SAX1 DTD event + public void notationDecl ( + String name, + String publicId, String systemId + ) throws SAXException + { + // DOM L2 can't create/save notation nodes + getDoctype ().declareNotation (name, publicId, systemId); + } + + // SAX1 DTD event + public void unparsedEntityDecl ( + String name, + String publicId, String systemId, + String notationName + ) throws SAXException + { + // DOM L2 can't create/save entity nodes + getDoctype ().declareEntity (name, publicId, systemId, + notationName); + } + + // SAX2 declaration event + public void internalEntityDecl (String name, String value) + throws SAXException + { + // DOM L2 can't create/save entity nodes + // NOTE: this doesn't save the value as a child of this + // node, though it could realistically do so. + getDoctype ().declareEntity (name, null, null, null); + } + + // SAX2 declaration event + public void externalEntityDecl ( + String name, + String publicId, + String systemId + ) throws SAXException + { + // DOM L2 can't create/save entity nodes + // NOTE: DOM allows for these to have children, if + // they don't have unbound namespace references. + getDoctype ().declareEntity (name, publicId, systemId, null); + } + + // SAX2 element + public void startElement ( + String uri, + String localName, + String qName, + Attributes atts + ) throws SAXException + { + Node top; + + super.startElement (uri, localName, qName, atts); + + // might there be more work? + top = getTop (); + if (!top.hasAttributes () || !(atts instanceof Attributes2)) + return; + + // remember any attributes that got defaulted + DomNamedNodeMap map = (DomNamedNodeMap) top.getAttributes (); + Attributes2 attrs = (Attributes2) atts; + int length = atts.getLength (); + + //map.compact (); + for (int i = 0; i < length; i++) { + if (attrs.isSpecified (i)) + continue; + + // value was defaulted. + String temp = attrs.getQName (i); + DomAttr attr; + + if ("".equals (temp)) + attr = (DomAttr) map.getNamedItemNS (attrs.getURI (i), + atts.getLocalName (i)); + else + attr = (DomAttr) map.getNamedItem (temp); + + // DOM L2 can't write this flag, only read it + attr.setSpecified (false); + } + } + + public void endElement ( + String uri, + String localName, + String qName + ) throws SAXException + { + DomNode top = (DomNode) getTop (); + top.compact (); + super.endElement (uri, localName, qName); + } + + protected Text createText ( + boolean isCDATA, + char buf [], + int off, + int len + ) { + DomDocument doc = (DomDocument) getDocument (); + + if (isCDATA) + return doc.createCDATASection (buf, off, len); + else + return doc.createTextNode (buf, off, len); + } + + public void elementDecl(String name, String model) + throws SAXException + { + getDoctype().elementDecl(name, model); + } + + public void attributeDecl ( + String ename, + String aname, + String type, + String mode, + String value + ) throws SAXException + { + getDoctype().attributeDecl(ename, aname, type, mode, value); + /* + if (value == null && !"ID".equals (type)) + return; + + DomDoctype.ElementInfo info; + + info = getDoctype ().getElementInfo (ename); + if (value != null) + info.setAttrDefault (aname, value); + if ("ID".equals (type)) + info.setIdAttr (aname); + */ + + } + + // force duplicate name checking off while we're + // using parser output (don't duplicate the work) + public void startDocument () throws SAXException + { + super.startDocument (); + + DomDocument doc = (DomDocument) getDocument (); + doc.setStrictErrorChecking(false); + doc.setBuilding(true); + } + + public void endDocument () + throws SAXException + { + DomDocument doc = (DomDocument) getDocument (); + doc.setStrictErrorChecking(true); + doc.setBuilding(false); + doc.compact (); + DomDoctype doctype = (DomDoctype) doc.getDoctype(); + if (doctype != null) + { + doctype.makeReadonly(); + } + super.endDocument (); + } + + // these three methods collaborate to populate entity + // refs, marking contents readonly on end-of-entity + + public boolean canPopulateEntityRefs () + { return true; } + + public void startEntity (String name) + throws SAXException + { + if (name.charAt (0) == '%' || "[dtd]".equals (name)) + return; + super.startEntity (name); + + DomNode top = (DomNode) getTop (); + + if (top.getNodeType () == Node.ENTITY_REFERENCE_NODE) + top.readonly = false; + } + + public void endEntity (String name) + throws SAXException + { + if (name.charAt (0) == '%' || "[dtd]".equals (name)) + return; + DomNode top = (DomNode) getTop (); + + if (top.getNodeType () == Node.ENTITY_REFERENCE_NODE) { + top.compact (); + top.makeReadonly (); + } + super.endEntity (name); + } + } +} |