/*******************************************************************************

 * Copyright (c) 2009 Matthew Hall 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:

 *     Matthew Hall - initial API and implementation (bug 258967)

 ******************************************************************************/

package org.eclipse.core.databinding;

import java.util.ArrayList;

import org.eclipse.core.databinding.observable.IObservable;

import org.eclipse.core.databinding.observable.Realm;

import org.eclipse.core.databinding.observable.list.IObservableList;

import org.eclipse.core.databinding.observable.list.WritableList;

import org.eclipse.core.databinding.observable.value.IObservableValue;

import org.eclipse.core.databinding.observable.value.WritableValue;

import org.eclipse.core.databinding.validation.ValidationStatus;

import org.eclipse.core.runtime.IStatus;

/**

 * {@link ValidationStatusProvider} implementation with mutable

 * {@link #getValidationStatus() validation status}, {@link #getModels() model}

 * and {@link #getTargets() target} observables.

 * 

 * @since 1.2

 */

public class WritableValidationStatusProvider extends ValidationStatusProvider {

	private IObservableValue validationStatus;

	private IObservableList targets;

	private IObservableList models;

	/**

	 * Constructs a new WritableValidationStatusProvider in the current default

	 * realm.

	 */

	public WritableValidationStatusProvider() {

		this(Realm.getDefault());

	}

	/**

	 * Constructs a new WritableValidationStatusProvider in the given realm.

	 * 

	 * @param realm

	 *            the realm

	 */

	public WritableValidationStatusProvider(Realm realm) {

		validationStatus = new WritableValue(realm, ValidationStatus.ok(),

				IStatus.class);

		targets = new WritableList(realm, new ArrayList(), IObservable.class);

		models = new WritableList(realm, new ArrayList(), IObservable.class);

	}

	public IObservableValue getValidationStatus() {

		return validationStatus;

	}

	/**

	 * Returns the list of target observables (if any) that are being tracked by

	 * this validation status provider.

	 * 

	 * @return an observable list of target {@link IObservable}s (may be empty)

	 */

	public IObservableList getTargets() {

		return targets;

	}

	/**

	 * Returns the model observables (if any) that are being tracked by this

	 * validation status provider.

	 * 

	 * @return an observable list of model {@link IObservable}s (may be empty)

	 */

	public IObservableList getModels() {

		return models;

	}

	public void dispose() {

		if (validationStatus != null) {

			validationStatus.dispose();

			validationStatus = null;

		}

		if (models != null) {

			models.dispose();

			models = null;

		}

		if (targets != null) {

			targets.dispose();

			targets = null;

		}

		super.dispose();

	}

}