| /******************************************************************************* |
| * Copyright (c) 2004 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.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; |
| } |
| |
| /** |
| * |
| * @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; |
| } |
| } |