plugins/org.eclipse.amalgam.explorer.activity.ui/src/org/eclipse/amalgam/explorer/activity/ui/api/editor/input/ActivityExplorerEditorInput.java

/*******************************************************************************
 * Copyright (c)  2006, 2018 THALES GLOBAL SERVICES.
 * 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:
 *    Thales - initial API and implementation
 *******************************************************************************/
package org.eclipse.amalgam.explorer.activity.ui.api.editor.input;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;

import org.eclipse.amalgam.explorer.activity.ui.ActivityExplorerActivator;
import org.eclipse.amalgam.explorer.activity.ui.api.editor.Messages;
import org.eclipse.amalgam.explorer.activity.ui.api.editor.pages.helper.EObjectLabelProviderHelper;
import org.eclipse.amalgam.explorer.activity.ui.api.editor.pages.helper.SessionHelper;
import org.eclipse.amalgam.explorer.activity.ui.internal.ActivityExplorerEditorInputFactory;
import org.eclipse.amalgam.explorer.activity.ui.internal.util.ActivityExplorerLoggerService;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.sirius.business.api.session.Session;
import org.eclipse.sirius.business.api.session.SessionManager;
import org.eclipse.sirius.business.api.session.danalysis.DAnalysisSession;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.IPersistableElement;
import org.eclipse.ui.part.FileEditorInput;

/**
 * ActivityExplorer editor input.
 * 
 */
public class ActivityExplorerEditorInput extends FileEditorInput implements IEditorInput, IPersistableElement {

    /**
     * File linked to this activity explorer.
     */
    private static final String ACTIVITY_EXPLORER_FILE = "activityExplorerFile"; //$NON-NLS-1$

    /**
     * status of the input FIXME why this is added here?
     */
    @Deprecated
    private IStatus _status;

    public ActivityExplorerEditorInput(IFile file) {
        super(file);
        loadState(getFile());
    }

    @Deprecated
    public ActivityExplorerEditorInput(Session session, EObject eObject) {
        this(SessionHelper.getFirstAnalysisFile((DAnalysisSession) session));
    }

    /**
     * Dispose.
     */
    public void dispose() {
        // Nothing to do
    }

    /**
     * @see org.eclipse.ui.IEditorInput#exists()
     */
    @Override
    public boolean exists() {
        Session session = this.getSession();
        return super.exists() && (session != null) && (session.isOpen());
    }

    /**
     * @see org.eclipse.core.runtime.IAdaptable#getAdapter(java.lang.Class)
     */
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public Object getAdapter(Class adapter_p) {
        if (adapter_p == Session.class) {
            IPath path = getFile().getFullPath();
            URI uri = URI.createPlatformResourceURI(path.toString(), true);
            Session session = SessionManager.INSTANCE.getExistingSession(uri);
            return session;
        }
        if ((null != _status) && (adapter_p == IStatus.class)) {
            return _status;
        }
        return super.getAdapter(adapter_p);
    }

    /**
     * @see org.eclipse.ui.IPersistableElement#getFactoryId()
     */
    public String getFactoryId() {
        return ActivityExplorerEditorInputFactory.ID;
    }

    /**
     * @see org.eclipse.ui.IEditorInput#getImageDescriptor()
     */
    public ImageDescriptor getImageDescriptor() {
        return null;
    }

    /**
     * Return the UI representation of current handled model.
     * 
     * @return
     */
    @Deprecated
    public String getModelUiName() {
        String result = ""; //$NON-NLS-1$
        EObject project = getRootSemanticElement();
        if (null != project) {
            result = EObjectLabelProviderHelper.getText(project);
        } else if (getFile() != null) {
            String fileExtension = getFile().getFileExtension();
            String fileName = getFile().getName();
            result = fileName.substring(0, fileName.indexOf(fileExtension) - 1);
        }
        return result;
    }

    /**
     * Get the underlying project.
     * 
     * @return the project
     */
    @Deprecated
    public EObject getRootSemanticElement() {
        EObject result = null;
        String path = null;
        try {
            IFile file = getFile();
            path = file.getFullPath().toString();
            String defaultCharset = null;
            defaultCharset = System.getProperty("file.encoding"); //$NON-NLS-1$
            defaultCharset = defaultCharset != null && defaultCharset.isEmpty() ? defaultCharset : "UTF-8"; //$NON-NLS-1$
            path = URLDecoder.decode(path, defaultCharset);
            URI uri = URI.createPlatformResourceURI(path, true);
            Session session = SessionManager.INSTANCE.getExistingSession(uri);
            result = getRootSemanticElement(session);
        } catch (UnsupportedEncodingException e) {
            ActivityExplorerLoggerService.getInstance().log(new Status(IStatus.ERROR, ActivityExplorerActivator.ID, "Could not find the resource " + path + ". See the error log for more details", e)); //$NON-NLS-1$
        }
        return result;
    }

    /**
     * @see org.eclipse.ui.IEditorInput#getName()
     */
    public String getName() {
        return getModelUiName();
    }

    /**
     * @see org.eclipse.ui.IEditorInput#getPersistable()
     */
    public IPersistableElement getPersistable() {
        return this;
    }

    /**
     * Get the underlying session.
     * 
     * @return a not <code>null</code> instance.
     */
    // TODO
    @Deprecated
    public Session getSession() {
        return (Session) getAdapter(Session.class);
    }

    @Deprecated
    public IStatus getStatus() {
        return (IStatus) getAdapter(IStatus.class);
    }

    /**
     * @see org.eclipse.ui.IEditorInput#getToolTipText()
     */
    public String getToolTipText() {
        return getModelUiName();
    }

    // FIXME be contributive
    private void loadState(IFile file) {
        try {
            Session session = org.eclipse.amalgam.explorer.activity.ui.api.editor.pages.helper.SessionHelper.getSession(file);

            // don't open session if already opened (bad performance)
            if (null == session) {
                // Instantiate the action responsible for opening a session.
                org.eclipse.amalgam.explorer.activity.ui.api.actions.OpenSessionAction openSessionAction = new org.eclipse.amalgam.explorer.activity.ui.api.actions.OpenSessionAction();
                openSessionAction.setRunInProgressService(false);
                openSessionAction.selectionChanged(new StructuredSelection(file));

                // Open the session.
                openSessionAction.run();
                _status = openSessionAction.getStatus();
                if (_status == null) {
                    _status = Status.OK_STATUS;
                }

                if (_status.isOK()) {
                    session = org.eclipse.amalgam.explorer.activity.ui.api.editor.pages.helper.SessionHelper.getSession(file);
                }
            }
            if (null == getRootSemanticElement()) {
                _status = new Status(IStatus.WARNING, ActivityExplorerActivator.ID, Messages.ActivityExplorerEditor_1);
            }
        } catch (Exception e) {
            _status = new Status(IStatus.ERROR, ActivityExplorerActivator.ID, e.getMessage(), e);
        }
    }

    /**
     * @see org.eclipse.ui.IPersistable#saveState(org.eclipse.ui.IMemento)
     */
    public void saveState(IMemento memento_p) {
        memento_p.putString(ACTIVITY_EXPLORER_FILE, getFile().getFullPath().toString());
    }

    /**
     * 
     * @param session_p
     * @return model root of the first semantic resource managed by session_p or null
     * 
     * @deprecated will be deteled
     */
    @Deprecated
    public EObject getRootSemanticElement(Session session_p) {
        return SessionHelper.getRootSemanticModel(session_p);
    }
}