/*******************************************************************************
 * Copyright (c) 2009, 2011 SAP AG and others.
 * 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:
 *     SAP AG - initial API and implementation
 ******************************************************************************
 * $Id: SelectionImpl.java,v 1.2 2011/03/05 21:52:05 auhl Exp $
 */
package dataaccess.query.impl;

import behavioral.actions.ActionsPackage;
import behavioral.actions.Iterator;

import dataaccess.expressions.Expression;

import dataaccess.expressions.impl.ObjectBasedExpressionImpl;

import dataaccess.query.QueryPackage;
import dataaccess.query.Selection;

import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.common.notify.NotificationChain;

import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.InternalEObject;

import org.eclipse.emf.ecore.impl.ENotificationImpl;

/**
 * <!-- begin-user-doc -->
 * An implementation of the model object '<em><b>Selection</b></em>'.
 * <!-- end-user-doc -->
 * <p>
 * The following features are implemented:
 * <ul>
 *   <li>{@link dataaccess.query.impl.SelectionImpl#getIterator <em>Iterator</em>}</li>
 *   <li>{@link dataaccess.query.impl.SelectionImpl#getSelectionExpr <em>Selection Expr</em>}</li>
 * </ul>
 * </p>
 *
 * @generated
 */
public class SelectionImpl extends ObjectBasedExpressionImpl implements Selection {
	/**
	 * The cached value of the '{@link #getIterator() <em>Iterator</em>}' containment reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getIterator()
	 * @generated
	 * @ordered
	 */
	protected Iterator iterator;

	/**
	 * The cached value of the '{@link #getSelectionExpr() <em>Selection Expr</em>}' containment reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getSelectionExpr()
	 * @generated
	 * @ordered
	 */
	protected Expression selectionExpr;

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	protected SelectionImpl() {
		super();
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	protected EClass eStaticClass() {
		return QueryPackage.Literals.SELECTION;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Iterator getIterator() {
		if (iterator != null && iterator.eIsProxy()) {
			InternalEObject oldIterator = (InternalEObject)iterator;
			iterator = (Iterator)eResolveProxy(oldIterator);
			if (iterator != oldIterator) {
				InternalEObject newIterator = (InternalEObject)iterator;
				NotificationChain msgs =  oldIterator.eInverseRemove(this, ActionsPackage.ITERATOR__SELECTION, Iterator.class, null);
				if (newIterator.eInternalContainer() == null) {
					msgs =  newIterator.eInverseAdd(this, ActionsPackage.ITERATOR__SELECTION, Iterator.class, msgs);
				}
				if (msgs != null) msgs.dispatch();
				if (eNotificationRequired())
					eNotify(new ENotificationImpl(this, Notification.RESOLVE, QueryPackage.SELECTION__ITERATOR, oldIterator, iterator));
			}
		}
		return iterator;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Iterator basicGetIterator() {
		return iterator;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetIterator(Iterator newIterator, NotificationChain msgs) {
		Iterator oldIterator = iterator;
		iterator = newIterator;
		if (eNotificationRequired()) {
			ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, QueryPackage.SELECTION__ITERATOR, oldIterator, newIterator);
			if (msgs == null) msgs = notification; else msgs.add(notification);
		}
		return msgs;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setIterator(Iterator newIterator) {
		if (newIterator != iterator) {
			NotificationChain msgs = null;
			if (iterator != null)
				msgs = ((InternalEObject)iterator).eInverseRemove(this, ActionsPackage.ITERATOR__SELECTION, Iterator.class, msgs);
			if (newIterator != null)
				msgs = ((InternalEObject)newIterator).eInverseAdd(this, ActionsPackage.ITERATOR__SELECTION, Iterator.class, msgs);
			msgs = basicSetIterator(newIterator, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, QueryPackage.SELECTION__ITERATOR, newIterator, newIterator));
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Expression getSelectionExpr() {
		if (selectionExpr != null && selectionExpr.eIsProxy()) {
			InternalEObject oldSelectionExpr = (InternalEObject)selectionExpr;
			selectionExpr = (Expression)eResolveProxy(oldSelectionExpr);
			if (selectionExpr != oldSelectionExpr) {
				InternalEObject newSelectionExpr = (InternalEObject)selectionExpr;
				NotificationChain msgs = oldSelectionExpr.eInverseRemove(this, EOPPOSITE_FEATURE_BASE - QueryPackage.SELECTION__SELECTION_EXPR, null, null);
				if (newSelectionExpr.eInternalContainer() == null) {
					msgs = newSelectionExpr.eInverseAdd(this, EOPPOSITE_FEATURE_BASE - QueryPackage.SELECTION__SELECTION_EXPR, null, msgs);
				}
				if (msgs != null) msgs.dispatch();
				if (eNotificationRequired())
					eNotify(new ENotificationImpl(this, Notification.RESOLVE, QueryPackage.SELECTION__SELECTION_EXPR, oldSelectionExpr, selectionExpr));
			}
		}
		return selectionExpr;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public Expression basicGetSelectionExpr() {
		return selectionExpr;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public NotificationChain basicSetSelectionExpr(Expression newSelectionExpr, NotificationChain msgs) {
		Expression oldSelectionExpr = selectionExpr;
		selectionExpr = newSelectionExpr;
		if (eNotificationRequired()) {
			ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, QueryPackage.SELECTION__SELECTION_EXPR, oldSelectionExpr, newSelectionExpr);
			if (msgs == null) msgs = notification; else msgs.add(notification);
		}
		return msgs;
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	public void setSelectionExpr(Expression newSelectionExpr) {
		if (newSelectionExpr != selectionExpr) {
			NotificationChain msgs = null;
			if (selectionExpr != null)
				msgs = ((InternalEObject)selectionExpr).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - QueryPackage.SELECTION__SELECTION_EXPR, null, msgs);
			if (newSelectionExpr != null)
				msgs = ((InternalEObject)newSelectionExpr).eInverseAdd(this, EOPPOSITE_FEATURE_BASE - QueryPackage.SELECTION__SELECTION_EXPR, null, msgs);
			msgs = basicSetSelectionExpr(newSelectionExpr, msgs);
			if (msgs != null) msgs.dispatch();
		}
		else if (eNotificationRequired())
			eNotify(new ENotificationImpl(this, Notification.SET, QueryPackage.SELECTION__SELECTION_EXPR, newSelectionExpr, newSelectionExpr));
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public NotificationChain eInverseAdd(InternalEObject otherEnd, int featureID, NotificationChain msgs) {
		switch (featureID) {
			case QueryPackage.SELECTION__ITERATOR:
				if (iterator != null)
					msgs = ((InternalEObject)iterator).eInverseRemove(this, EOPPOSITE_FEATURE_BASE - QueryPackage.SELECTION__ITERATOR, null, msgs);
				return basicSetIterator((Iterator)otherEnd, msgs);
		}
		return super.eInverseAdd(otherEnd, featureID, msgs);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public NotificationChain eInverseRemove(InternalEObject otherEnd, int featureID, NotificationChain msgs) {
		switch (featureID) {
			case QueryPackage.SELECTION__ITERATOR:
				return basicSetIterator(null, msgs);
			case QueryPackage.SELECTION__SELECTION_EXPR:
				return basicSetSelectionExpr(null, msgs);
		}
		return super.eInverseRemove(otherEnd, featureID, msgs);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public Object eGet(int featureID, boolean resolve, boolean coreType) {
		switch (featureID) {
			case QueryPackage.SELECTION__ITERATOR:
				if (resolve) return getIterator();
				return basicGetIterator();
			case QueryPackage.SELECTION__SELECTION_EXPR:
				if (resolve) return getSelectionExpr();
				return basicGetSelectionExpr();
		}
		return super.eGet(featureID, resolve, coreType);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void eSet(int featureID, Object newValue) {
		switch (featureID) {
			case QueryPackage.SELECTION__ITERATOR:
				setIterator((Iterator)newValue);
				return;
			case QueryPackage.SELECTION__SELECTION_EXPR:
				setSelectionExpr((Expression)newValue);
				return;
		}
		super.eSet(featureID, newValue);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public void eUnset(int featureID) {
		switch (featureID) {
			case QueryPackage.SELECTION__ITERATOR:
				setIterator((Iterator)null);
				return;
			case QueryPackage.SELECTION__SELECTION_EXPR:
				setSelectionExpr((Expression)null);
				return;
		}
		super.eUnset(featureID);
	}

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	@Override
	public boolean eIsSet(int featureID) {
		switch (featureID) {
			case QueryPackage.SELECTION__ITERATOR:
				return iterator != null;
			case QueryPackage.SELECTION__SELECTION_EXPR:
				return selectionExpr != null;
		}
		return super.eIsSet(featureID);
	}

} //SelectionImpl