/*******************************************************************************
* Copyright (c) 2001, 2008 Oracle 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:
* Oracle Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsf.designtime.internal.resolver;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jst.jsf.common.runtime.internal.view.model.common.ITagElement;
import org.eclipse.jst.jsf.context.IModelContext;
import org.eclipse.jst.jsf.context.resolver.structureddocument.IDOMContextResolver;
import org.eclipse.jst.jsf.context.resolver.structureddocument.IMetadataContextResolver;
import org.eclipse.jst.jsf.context.resolver.structureddocument.ITaglibContextResolver;
import org.eclipse.jst.jsf.context.resolver.structureddocument.IWorkspaceContextResolver;
import org.eclipse.jst.jsf.context.resolver.structureddocument.internal.IStructuredDocumentContextResolverFactory2;
import org.eclipse.jst.jsf.context.resolver.structureddocument.internal.ITextRegionContextResolver;
import org.eclipse.jst.jsf.context.structureddocument.IStructuredDocumentContext;
import org.eclipse.jst.jsf.designtime.DTAppManagerUtil;
import org.eclipse.jst.jsf.designtime.internal.view.XMLViewDefnAdapter;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* A Taglib resolver that delegates to the design tieme view handler so that it
* is independent of the tag definition type in use. Document must still be an
* IStructuredDocument.
*
*/
public class ViewBasedTaglibResolverFactory implements
IStructuredDocumentContextResolverFactory2, IAdaptable
{
public IDOMContextResolver getDOMContextResolver(
final IStructuredDocumentContext context)
{
// no dom resolver
return null;
}
public IMetadataContextResolver getMetadataContextResolver(
final IStructuredDocumentContext context)
{
// no metadata resolver
return null;
}
public ITaglibContextResolver getTaglibContextResolver(
final IStructuredDocumentContext context)
{
if (context.getStructuredDocument() instanceof IStructuredDocument)
{
final IWorkspaceContextResolver resolver = INSTANCE
.getWorkspaceContextResolver(context);
if (resolver != null)
{
final IResource res = resolver.getResource();
if (res instanceof IFile)
{
final IFile file = (IFile) res;
final IProject project = file.getProject();
if (project != null)
{
try
{
return new ViewBasedTaglibResolver(context, file,
project);
}
catch (final IllegalArgumentException e)
{
// the constructor will throw this if the view
// definition
// adapter for file is not of the base type it needs
// just fall through, no need to log
}
}
}
}
}
return null;
}
public ITaglibContextResolver getTaglibContextResolverFromDelegates(
IStructuredDocumentContext context) {
throw new UnsupportedOperationException();
}
public <T> T getResolver(final IStructuredDocumentContext context, final Class<T> clazz) {
if (clazz.equals(ITagElementResolver.class) ||
clazz.equals(ITaglibContextResolver.class)) {
return (T)getTaglibContextResolver(context);
}
return null;
}
/**
* A taglib resolver that goes through the design time view handler to
* resolve tags. This allows us to abstract the definition format (XML) from
* the kind of tag handlers that process it (JSP vs. Facelets vs. others).
*
*/
private static class ViewBasedTaglibResolver implements
ITaglibContextResolver, ITagElementResolver
{
private final IProject _project;
private final IFile _file;
private final IStructuredDocumentContext _context;
/**
* @param context
* @param file
* @param project
*/
private ViewBasedTaglibResolver(
final IStructuredDocumentContext context, final IFile file,
final IProject project)
{
super();
_context = context;
_file = file;
_project = project;
if (DTAppManagerUtil.getXMLViewDefnAdapter(project, file) == null)
{
throw new IllegalArgumentException(
"View definition adapter not found"); //$NON-NLS-1$
}
}
public String getTagPrefixForURI(final String uri)
{
final XMLViewDefnAdapter adapter = DTAppManagerUtil
.getXMLViewDefnAdapter(_file);
if (adapter != null)
{
return adapter.getPrefix(uri, _context.getStructuredDocument());
}
return null;
}
public String getTagURIForNodeName(final Node node)
{
final XMLViewDefnAdapter adapter = DTAppManagerUtil
.getXMLViewDefnAdapter(_file);
final Element element = getElement(node);
if (element != null && adapter != null)
{
return adapter.getNamespace(element, _context.getStructuredDocument());
}
return null;
}
public NodeList getTagsByNamespaceURI(final String uri,
final String tagName)
{
// TODO: what is the purpose of this API? deprecate?
return null;
}
public boolean hasTag(final Node node)
{
// it is sufficient to check that the view adapter will give us
// a non-null tag element
return _getTagElement(node) != null;
}
public boolean canResolveContext(final IModelContext modelContext)
{
// must be a JSP page
final Object adapter = modelContext.getAdapter(IStructuredDocumentContext.class);
if (adapter instanceof IStructuredDocumentContext)
{
return ((IStructuredDocumentContext)adapter).getStructuredDocument() instanceof IStructuredDocument;
}
return false;
}
private Element getElement(final Node node)
{
Element checkNode = null;
if (node instanceof Element)
{
checkNode = (Element) node;
}
else if (node instanceof Attr)
{
checkNode = ((Attr) node).getOwnerElement();
}
return checkNode;
}
private ITagElement _getTagElement(final Node node)
{
final Element element = getElement(node);
final XMLViewDefnAdapter adapter =
DTAppManagerUtil.getXMLViewDefnAdapter(_project, _file);
if (element != null && adapter != null)
{
return adapter.mapToTagElement(element, _context
.getStructuredDocument());
}
return null;
}
public ITagElement getTagElement(final Node node) {
return _getTagElement(node);
}
}
public ITextRegionContextResolver getTextRegionResolver(
final IStructuredDocumentContext context)
{
// no text region resolver
return null;
}
public IWorkspaceContextResolver getWorkspaceContextResolver(
final IStructuredDocumentContext context)
{
// no workspace resolver
return null;
}
public Object getAdapter(final Class adapter)
{
if (adapter.isInstance(this))
{
return this;
}
return null;
}
}