/*******************************************************************************
* Copyright (c) 2008 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.internal.symbols;
import java.util.List;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jst.jsf.common.internal.types.ValueType;
import org.eclipse.jst.jsf.context.resolver.structureddocument.IDOMContextResolver;
import org.eclipse.jst.jsf.context.resolver.structureddocument.IStructuredDocumentContextResolverFactory;
import org.eclipse.jst.jsf.context.structureddocument.IStructuredDocumentContext;
import org.eclipse.jst.jsf.context.structureddocument.IStructuredDocumentContextFactory;
import org.eclipse.jst.jsf.context.symbol.ISymbol;
import org.eclipse.jst.jsf.context.symbol.source.AbstractContextSymbolFactory;
import org.eclipse.jst.jsf.context.symbol.source.IAdditionalContextSymbolInfo;
import org.eclipse.jst.jsf.designtime.symbols.FileContextUtil;
import org.eclipse.jst.jsf.designtime.symbols.JSFSymbolFactory;
import org.eclipse.jst.jsf.validation.internal.appconfig.AppConfigValidationUtil;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMAttr;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMElement;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
*
* @author cbateman
*
*/
public class ValueExpressionSymbolFactory extends AbstractContextSymbolFactory
{
private final JSFSymbolFactory _factory = new JSFSymbolFactory();
@Override
protected ISymbol internalCreate(final String symbolName, final int scope,
final IAdaptable context, final List problems,
final IAdditionalContextSymbolInfo additionalInfo)
{
final Node node = getNode(context);
final IStructuredDocumentContext sContext = getContext(context);
final String valueAttrName = additionalInfo
.getValueExpressionAttributeName();
if (node != null && valueAttrName != null)
{
Element element = null;
if (node instanceof Element)
{
element = (Element) node;
}
else
{
element = ((Attr) node).getOwnerElement();
}
return createSymbol(symbolName, sContext, valueAttrName, element);
}
return null;
}
private ISymbol createSymbol(final String name,
final IStructuredDocumentContext sContext,
final String valueAttrName, Element element)
{
if (element instanceof IDOMElement) // implicit null check.
{
final Attr attr = element.getAttributeNode(valueAttrName);
if (attr instanceof IDOMAttr && attr.getValue() != null)
{
// TODO: the extract expression method belongs in more
// generic code
final String elText = AppConfigValidationUtil
.extractELExpression(attr.getValue()).getElText();
final IFile file = FileContextUtil
.deriveIFileFromContext(sContext);
final IStructuredDocumentContext elContext = IStructuredDocumentContextFactory.INSTANCE
.getContext(sContext.getStructuredDocument(), attr);
if (elText != null && file != null && elContext != null)
{
final ValueType valueExpr = _factory
.getValueTypeFromEL(elText, elContext, file);
if (valueExpr != null)
{
final IJavaProject javaProject = getJavaProject(sContext);
return _factory.createJavaComponentSymbol(name, valueExpr, null, javaProject);
}
}
}
}
return null;
}
@Override
protected ISymbol internalCreate(final String symbolName, final int scope,
final IAdaptable context, final List problems)
{
// need additionalInfo
return null;
}
@Override
public boolean supports(final IAdaptable context)
{
final Node node = getNode(context);
final IJavaProject javaProject = getJavaProject(context);
return javaProject != null && (node instanceof Element) || (node instanceof Attr);
}
private Node getNode(final IAdaptable context)
{
final IStructuredDocumentContext sContext = getContext(context);
if (sContext != null)
{
final IDOMContextResolver domResolver = IStructuredDocumentContextResolverFactory.INSTANCE
.getDOMContextResolver(sContext);
if (domResolver != null)
{
return domResolver.getNode();
}
}
return null;
}
private IJavaProject getJavaProject(final IAdaptable context)
{
final IStructuredDocumentContext sContext = getContext(context);
if (sContext != null)
{
final IProject project = FileContextUtil
.getProject((IStructuredDocumentContext) sContext
.getAdapter(IStructuredDocumentContext.class));
if (project != null)
{
return JavaCore.create(project);
}
}
return null;
}
private IStructuredDocumentContext getContext(final IAdaptable context)
{
if (context != null)
{
return (IStructuredDocumentContext) context
.getAdapter(IStructuredDocumentContext.class);
}
return null;
}
}