/*******************************************************************************
 * 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;

import org.eclipse.viatra2.core.IModelElement;

/**
 * The enumeration of scopes.
 */
public class Scope {
    //TODO: have to change it to EdgeType!! (in this case the ChuiEdmonds needed to be overviewed
	public static Integer BELOW = 1;
    public static Integer IN = 0;

    public static Integer DEFAULT_MODE = BELOW;
    public static IModelElement DEFAULT_PARENT; // = root;

    private int containmentMode;
    protected IModelElement parent;

    public Scope() {
        this(DEFAULT_MODE, DEFAULT_PARENT);
    }
    
    public Scope(Integer mode, IModelElement parent) {
        this.containmentMode = (mode == null ? DEFAULT_MODE : mode);
        this.parent = (parent == null ? DEFAULT_PARENT : parent);
    }
    
    public Integer getContainmentMode() {
        return containmentMode;
    }
    
    public IModelElement getParent() {
        return parent;
    }

	/* (non-Javadoc)
	 * @see java.lang.Object#hashCode()
	 */
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + containmentMode;
		result = prime * result + ((parent == null) ? 0 : parent.hashCode());
		return result;
	}

	/* (non-Javadoc)
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Scope other = (Scope) obj;
		if (containmentMode != other.containmentMode)
			return false;
		if (parent == null) {
			if (other.parent != null)
				return false;
		} else if (!parent.equals(other.parent))
			return false;
		return true;
	}
    
    
}