/*******************************************************************************
* Copyright (c) 2006 Oracle Corporation.
* 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:
* Cameron Bateman/Oracle - initial API and implementation
*
********************************************************************************/
package org.eclipse.jst.jsf.designtime.symbols;
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.context.resolver.structureddocument.IStructuredDocumentContextResolverFactory;
import org.eclipse.jst.jsf.context.resolver.structureddocument.IWorkspaceContextResolver;
import org.eclipse.jst.jsf.context.structureddocument.IStructuredDocumentContext;
/**
* Utility for deriving an IFile from an IAdaptable
*
* @author cbateman
*
*/
public final class FileContextUtil
{
/**
* @param context
* @return an IFile derived from context or null if not derivable
*/
public static IFile deriveIFileFromContext(IAdaptable context)
{
//
if (context instanceof IFile)
{
return (IFile) context;
}
else if (context.getAdapter(IFile.class) != null)
{
return (IFile) context.getAdapter(IFile.class);
}
else if (context instanceof IStructuredDocumentContext)
{
return deriveIFileFromContext((IStructuredDocumentContext)context);
}
else
{
IStructuredDocumentContext sdContext =
(IStructuredDocumentContext) context.getAdapter(IStructuredDocumentContext.class);
if (sdContext != null)
{
return deriveIFileFromContext(sdContext);
}
}
return null;
}
private static IFile deriveIFileFromContext(IStructuredDocumentContext context)
{
IWorkspaceContextResolver resolver =
IStructuredDocumentContextResolverFactory.
INSTANCE.
getWorkspaceContextResolver(context);
if (resolver != null)
{
IResource res = resolver.getResource();
if (res instanceof IFile)
{
return (IFile) res;
}
}
return null;
}
/**
* Convenience method for getting the IProject for a document context.
*
* @param context
* @return the project associated with context or null if can't be derived
*/
public static IProject getProject(final IStructuredDocumentContext context)
{
final IWorkspaceContextResolver wkResolver = IStructuredDocumentContextResolverFactory.INSTANCE
.getWorkspaceContextResolver(context);
if (wkResolver != null)
{
return wkResolver.getProject();
}
return null;
}
private FileContextUtil()
{
// no instantiation
}
}