[ http://issues.apache.org/jira/browse/XERCESJ-1114?page=all ]
Michael Glavassevich reassigned XERCESJ-1114:
---------------------------------------------
Assignee: Michael Glavassevich
> Parameter entities in the internal subset using DOM.getInternalsubset are
> either resolved or skipped
> ----------------------------------------------------------------------------------------------------
>
> Key: XERCESJ-1114
> URL: http://issues.apache.org/jira/browse/XERCESJ-1114
> Project: Xerces2-J
> Issue Type: Bug
> Components: DOM (HTML)
> Affects Versions: 2.7.1
> Environment: Windows XP JDK 1.4
> Reporter: Laszlo Bartos
> Assigned To: Michael Glavassevich
>
> I have to print out the internal subset of XML documents, but the parameter
> entity refs are always resolved by DOM parser. If I set the feature
> http://xml.org/sax/features/external-parameter-entities to false, then it is
> resolved to empty string (so the parameter entity ref disappears).
>
> To reproduce the problem:
>
> 1. Save this as an XML document
>
> <?xml version="1.0" encoding="utf-8"?>
> <!DOCTYPE PEtest PUBLIC "-//TEST//DTD PETest XML//EN" "petest.dtd" [ <!ENTITY
> % local.ent PUBLIC "-//TEST//DTD PETest Extension XML//EN" ""> %local.ent; ]>
> <PETest> <front> </front> <body> </body></PETest>
>
> 2. Set the feature http://xml.org/sax/features/external-parameter-entities to
> false and call the DOM parser. Here is a sample program:
> public static void main(String argv[]) {
> ParserWrapper parser = null;
> // create parser
> try {
> parser =
> (ParserWrapper)Class.forName("dom.wrappers.Xerces").newInstance();
> parser.setFeature("http://xml.org/sax/features/namespaces";,
> false);
> parser.setFeature("http://xml.org/sax/features/validation";,
> false);
>
> parser.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd";,
> false);
>
> parser.setFeature("http://apache.org/xml/features/validation/schema";, false);
>
> parser.setFeature("http://apache.org/xml/features/validation/dynamic";, false);
> parser.setFeature("http://apache.org/xml/features/xinclude";,
> false);
>
> parser.setFeature("http://xml.org/sax/features/external-parameter-entities";,
> false);
> // parse file
> Document document = parser.parse(argv[0]);
> System.out.println(document.getDoctype().getInternalSubset());
> }
> catch (Exception e) {
> e.printStackTrace(System.err);
> }
> } // main(String[])
> Result: The getInternalSubset will return
> <!ENTITY % local.ent PUBLIC "-//TEST//DTD PETest Extension XML//EN" "">
> which means that the entity ref is resolved to empty string. (If I set
> http://xml.org/sax/features/external-parameter-entities to true, then the
> parameter entity ref is correctly resolved and returned in getInternalSubset,
> however I need the reference without resolving it.)
> I have found that if I add the following code into
> org.apache.xerces.parsers.AbstractDOMParser.startParameterEntity(String,
> XMLResourceIdentifier, String, Augmentations):
> ...
> //append the paremeter entity reference if it was not resolved
> if (fInDTD && fInternalSubset != null && !fInDTDExternalSubset &&
> augs != null) {
> Object skip = augs.getItem(Constants.ENTITY_SKIPPED);
> if (skip instanceof Boolean && (Boolean)skip == Boolean.TRUE) {
> fInternalSubset.append(name);
> fInternalSubset.append(";\n");
> }
> }
>
> then the parameter entity ref is included in the internal subset.
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