org.eclipse.osbp.vaaclipse.addons.common/src/org/eclipse/osbp/vaaclipse/addons/common/status/StatusManager.java

/**
 * Copyright (c) 2011, 2014 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 * 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: 
 * 		Florian Pirchner - Initial implementation
 */
package org.eclipse.osbp.vaaclipse.addons.common.status;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.annotation.PreDestroy;
import javax.inject.Inject;

import org.eclipse.e4.core.contexts.Active;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.core.services.events.IEventBroker;
import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.e4.ui.workbench.modeling.EPartService;
import org.eclipse.osbp.runtime.common.validation.IStatus;
import org.eclipse.osbp.vaaclipse.addons.common.api.IE4Topics;
import org.eclipse.osbp.vaaclipse.addons.common.api.status.IStatusManager;
import org.eclipse.osbp.vaaclipse.addons.common.api.status.IStatusScope;

/**
 * The Class StatusManager.
 */
public class StatusManager implements IStatusManager {

	/** The scopes. */
	private final Map<MPart, IStatusScope> scopes = new HashMap<MPart, IStatusScope>();

	/** The event broker. */
	@Inject
	private IEventBroker eventBroker;

	/** The part service. */
	@Inject
	private EPartService partService;

	/** The active part. */
	private MPart activePart;

	/**
	 * Instantiates a new status manager.
	 */
	public StatusManager() {

	}

	/* (non-Javadoc)
	 * @see org.eclipse.osbp.vaaclipse.addons.common.api.status.IStatusManager#getAllStatus()
	 */
	@Override
	public List<IStatus> getAllStatus() {
		IStatusScope scope = getActiveScope();
		if (scope == null) {
			return Collections.emptyList();
		}

		return scope.getAllStatus();
	}

	/**
	 * Returns the scope of the currently active MPart.
	 *
	 * @return the active scope
	 */
	public IStatusScope getActiveScope() {
		return scopes.get(activePart);
	}

	/**
	 * Sets the active view.
	 *
	 * @param activePart
	 *            the new active view
	 */
	@Inject
	public void setActiveView(@Active @Optional MPart activePart) {

		this.activePart = activePart;
		if (activePart == null) {
			return;
		}
		ensureScope(this.activePart);

		Map<String, Object> props = new HashMap<String, Object>();
		props.put(IE4Topics.StatusManagerEvents.PROP_SCOPE, getActiveScope());
		eventBroker
				.post(IE4Topics.StatusManagerEvents.ACTIVE_SCOPE_CHANGED_TOPIC,
						props);
	}

	/**
	 * Ensure scope.
	 *
	 * @param mPart
	 *            the m part
	 */
	protected void ensureScope(MPart mPart) {
		if (mPart == null) {
			return;
		}

		if (!scopes.containsKey(mPart)) {
			IStatusScope scope = new StatusScope(mPart, eventBroker);
			scopes.put(mPart, scope);
		}
	}

	/* (non-Javadoc)
	 * @see org.eclipse.osbp.vaaclipse.addons.common.api.status.IStatusManager#getAllScopes()
	 */
	@Override
	public List<IStatusScope> getAllScopes() {
		return Collections.unmodifiableList(new ArrayList<IStatusScope>(scopes
				.values()));
	}

	/* (non-Javadoc)
	 * @see org.eclipse.osbp.vaaclipse.addons.common.api.status.IStatusManager#getScopeFor(org.eclipse.e4.ui.model.application.ui.basic.MPart)
	 */
	@Override
	public IStatusScope getScopeFor(MPart mPart) {
		ensureScope(mPart);
		return scopes.get(mPart);
	}

	/**
	 * Dispose.
	 */
	@PreDestroy
	protected void dispose() {
		scopes.clear();
		activePart = null;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.osbp.vaaclipse.addons.common.api.status.IStatusManager#getAllScopeStatus()
	 */
	@Override
	public List<IStatus> getAllScopeStatus() {
		List<IStatus> result = new ArrayList<>();
		for(IStatusScope scope : getAllScopes()) {
			result.addAll(scope.getAllStatus());
		}
		return result;
	}
}