plugins/org.eclipse.m2m.qvt.oml.editor.ui/src/org/eclipse/m2m/internal/qvt/oml/editor/ui/hovers/ResolveInMappingInfoProvider.java

/*******************************************************************************
 * Copyright (c) 2007 Borland Software 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:
 *     Borland Software Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.m2m.internal.qvt.oml.editor.ui.hovers;

import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.m2m.internal.qvt.oml.cst.ResolveInExpCS;
import org.eclipse.m2m.internal.qvt.oml.editor.ui.CSTHelper;
import org.eclipse.m2m.internal.qvt.oml.editor.ui.hyperlinks.ResolveInHyperlinkDetector;
import org.eclipse.m2m.internal.qvt.oml.expressions.MappingOperation;
import org.eclipse.ocl.ecore.EcoreEnvironment;

public class ResolveInMappingInfoProvider implements IElementInfoProvider {

	public String getElementInfo(final Object element, ITextViewer textViewer, IRegion region) {
		
		if (element instanceof ResolveInExpCS) {
			ResolveInExpCS syntaxElement = (ResolveInExpCS) element;
			
			MappingOperation mappingOperation = ResolveInHyperlinkDetector.findReferencedDefinition(syntaxElement);
			EcoreEnvironment env = CSTHelper.getEnvironment(syntaxElement);			
			
			if(mappingOperation != null && env != null) {
				return SignatureUtil.getOperationSignature(env.getUMLReflection(), mappingOperation);
			}
		}
		
		return null;
	}
}