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/*******************************************************************************
* Copyright (c) 2004, 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.html.core.internal.modelquery;
import org.eclipse.wst.common.uriresolver.internal.provisional.URIResolver;
import org.eclipse.wst.xml.core.internal.contentmodel.CMDocument;
import org.eclipse.wst.xml.core.internal.contentmodel.modelquery.CMDocumentManager;
import org.eclipse.wst.xml.core.internal.contentmodel.modelqueryimpl.XMLAssociationProvider;
import org.eclipse.wst.xml.core.internal.contentmodel.util.CMDocumentCache;
import org.w3c.dom.Document;
/**
* A Class to provide an association between XHTML documents and DTDs for
* XHTML. This class is intended to be used only in HTMLModelQueryCMProvider.
*/
/*
* This class closely resemble XMLModelQueryAssociationProvider.
*/
class XHTMLAssociationProvider extends XMLAssociationProvider {
/**
* set USE_QUICK_CACHE to false to test effects of not caching at all.
*/
private static final boolean USE_QUICK_CACHE = true;
protected URIResolver idResolver;
private String fCachedGrammerURI;
private String fCachedPublicID;
private String fCachedSystemID;
private boolean cached;
public XHTMLAssociationProvider(CMDocumentCache cache, URIResolver idResolver) {
super(cache);
this.idResolver = idResolver;
// See https://bugs.eclipse.org/bugs/show_bug.cgi?id=136399. If the CM document URI
// is resolved and cached at this level instruct the CM model manager to avoid
// re-resolving the URI.
if (USE_QUICK_CACHE) {
documentManager.setPropertyEnabled(CMDocumentManager.PROPERTY_PERFORM_URI_RESOLUTION, false);
}
}
/**
*
* @param publicId
* @param systemId
* @return
*/
public CMDocument getXHTMLCMDocument(String publicId, String systemId) {
if (idResolver == null)
return null;
String grammerURI = null;
if (USE_QUICK_CACHE) {
/*
* In parsing a document, we get many identical requests to this
* method, so instead of looking up (resolving) grammerURI each
* time, we'll just return previously cached one. Probably not
* worth have a more complex cache than that.
*/
if (cached && sameAs(fCachedPublicID, publicId) && sameAs(fCachedSystemID, systemId)) {
grammerURI = fCachedGrammerURI;
}
else {
grammerURI = idResolver.resolve(null, publicId, systemId);
fCachedGrammerURI = grammerURI;
fCachedPublicID = publicId;
fCachedSystemID = systemId;
cached = true;
}
}
else {
grammerURI = idResolver.resolve(null, publicId, systemId);
}
if (grammerURI == null)
return null;
/*
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=88896
*
* We once called the deprecated 2 argument form of getCMDocument.
*
* CMDocument cmDocument = documentManager.getCMDocument(publicId,
* grammerURI);
*
* which eventually resulted in empty string for type, which I don't
* think the infrastructure handles any longer. So, I deleted
* deprecated methods, and switched to null for type argument.
*
* 'null' means to "create based on uri".
*
* FYI, 'dtd' would mean load only those registered as dtd's
*
* CMDocument cmDocument = documentManager.getCMDocument(publicId,
* grammerURI); CMDocument cmDocument =
* documentManager.getCMDocument(publicId, grammerURI, "dtd");
*/
CMDocument cmDocument = documentManager.getCMDocument(publicId, grammerURI, null);
return cmDocument;
}
/**
*/
protected String resolveGrammarURI(Document document, String publicId, String systemId) {
return idResolver.resolve(null, publicId, systemId);
}
private boolean sameAs(String a, String b) {
boolean result = false;
if (a == null) {
result = b == null;
}
else {
result = a.equals(b);
}
return result;
}
/**
* This added and/or made public specifically for experimentation. It
* will change as this functionality becomes API. See
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=119084
*/
public String getCachedGrammerURI() {
return fCachedGrammerURI;
}
}
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