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/*******************************************************************************
* 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.resolver;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jst.jsf.context.AbstractDelegatingFactory;
import org.eclipse.jst.jsf.context.IModelContext;
import org.eclipse.jst.jsf.context.structureddocument.IStructuredDocumentContext;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
/**
* Factory create resolver capable of resolving symbols in a structured document
*
* Clients may not sub-class.
*
* @author cbateman
*
*/
public final class StructuredDocumentSymbolResolverFactory extends
AbstractDelegatingFactory implements
IStructuredDocumentSymbolResolverFactory
{
private static StructuredDocumentSymbolResolverFactory INSTANCE;
/**
* @return the singleton factory instance
*/
public final static synchronized StructuredDocumentSymbolResolverFactory getInstance()
{
if (INSTANCE == null)
{
// no delegates supported
INSTANCE = new StructuredDocumentSymbolResolverFactory(new Class[]
{ IStructuredDocumentSymbolResolverFactory.class });
}
return INSTANCE;
}
private StructuredDocumentSymbolResolverFactory(
Class[] supportedDelegateTypes)
{
super(supportedDelegateTypes);
for (final IAdaptable delegate : SymbolContextResolverReader
.getAllHandlers())
{
addFactoryDelegate(delegate);
}
}
/**
* @param context
* @return a new instance of symbol resolver for context
*/
public ISymbolContextResolver getSymbolContextResolver(IModelContext context)
{
ISymbolContextResolver resolver = delegateGetSymbolContextResolver(context);
if (resolver == null)
{
resolver = internalGetSymbolContextResolver(context);
}
return resolver;
}
private ISymbolContextResolver internalGetSymbolContextResolver(
IModelContext context)
{
if (context instanceof IStructuredDocumentContext
&& ((IStructuredDocumentContext) context)
.getStructuredDocument() instanceof IStructuredDocument)
{
return new SymbolContextResolver(
(IStructuredDocumentContext) context);
}
return null;
}
private ISymbolContextResolver delegateGetSymbolContextResolver(
IModelContext context)
{
for (final IAdaptable adaptable : _delegates)
{
final IStructuredDocumentSymbolResolverFactory delegateFactory =
(IStructuredDocumentSymbolResolverFactory) adaptable
.getAdapter(IStructuredDocumentSymbolResolverFactory.class);
ISymbolContextResolver symbolContextResolver = delegateFactory
.getSymbolContextResolver(context);
if (symbolContextResolver != null)
{
return symbolContextResolver;
}
}
return null;
}
}
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