org.eclipse.viatra2.gtasm.patternmatcher.impl/src/org/eclipse/viatra2/gtasm/patternmatcher/impl/gtmatcher/internal/operation/DeleteModelElement.java

/*******************************************************************************
 * Copyright (c) 2004-2008 Akos Horvath, Gergely Varro and Daniel Varro
 * 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:
 *    Akos Horvath, Gergely Varro - initial API and implementation
 *******************************************************************************/

 package org.eclipse.viatra2.gtasm.patternmatcher.impl.gtmatcher.internal.operation;

import org.eclipse.viatra2.core.EDeleteSemantics;
import org.eclipse.viatra2.core.IModelElement;
import org.eclipse.viatra2.core.IModelManager;
import org.eclipse.viatra2.errors.VPMCoreException;
import org.eclipse.viatra2.gtasm.patternmatcher.impl.gtmatcher.exceptions.GTErrorStrings;
import org.eclipse.viatra2.gtasm.patternmatcher.impl.gtmatcher.exceptions.GTOperationException;
import org.eclipse.viatra2.gtasm.patternmatcher.impl.patternmatcher.internal.MatchingFrame;
import org.eclipse.viatra2.gtasmmodel.gtasm.metamodel.asm.core.AnnotatedElement;
import org.eclipse.viatra2.gtasmmodel.gtasm.metamodel.asm.enums.ValueKind;

/**
 * @author Akos Horvath
 *
 */
public class DeleteModelElement extends DeleteElement {

	public DeleteModelElement(IModelManager manager, int variableI) {
		super(manager, variableI);
	}

	@Override
	protected boolean delete(MatchingFrame frame) throws GTOperationException {

		IModelElement elementToDelete = null;
        
        try {
        	elementToDelete = (IModelElement) frame.getValue(this.variableIndex);
        } catch (ClassCastException e) {
        	String[] context = {frame.getPattern().getSearchGraph().getSearchNode(variableIndex).getName(), getClass().getSimpleName()};
			throw new GTOperationException(GTErrorStrings.NOT_A_MODELELEMENT
					,context
					,frame.getPattern().getSearchGraph().getSearchNode(variableIndex).getTraceabilityElement().getRepresentativeEMFElement());
         }
        if (elementToDelete == null) {
        	String[] context = {frame.getPattern().getSearchGraph().getSearchNode(variableIndex).getName(),getClass().getSimpleName()};
			throw new GTOperationException(GTErrorStrings.INTERNAL_EMPTY_VALUE
					,context
					,frame.getPattern().getSearchGraph().getSearchNode(variableIndex).getTraceabilityElement().getRepresentativeEMFElement());
     
        }
        		
		try {
			manager.deleteElement(elementToDelete, EDeleteSemantics.DELETE_SEMANTICS_BRANCH_FORCE);
			frame.setValue(variableIndex, ValueKind.UNDEF_LITERAL);
			
		}catch (VPMCoreException e) {
			String context[] = {frame.getPattern().getSearchGraph().getSearchNode(variableIndex).getName(),e.getMessage()};
			throw new GTOperationException(GTErrorStrings.INTERNAL_DELETE_MODELELEMENT
					,context
					,frame.getPattern().getSearchGraph().getSearchNode(variableIndex).getTraceabilityElement().getRepresentativeEMFElement());
		}
		return true;
	}


    public String toString(){
    	return "Del: "+variableIndex;
    }
    
    @Override
	public AnnotatedElement getErrorfulElement(MatchingFrame frame){
    	return frame.getPattern().getSearchGraph().getSearchNode(variableIndex).getTraceabilityElement().getRepresentativeEMFElement();
    }
}