plugins/org.eclipse.egf.pattern.ui/src/org/eclipse/egf/pattern/ui/editors/PatternMethodEditorInput.java

/**
 * <copyright>
 * 
 * Copyright (c) 2009-2010 Thales Corporate Services S.A.S.
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-v2.0.
 *
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 * Thales Corporate Services S.A.S - initial API and implementation
 * 
 * </copyright>
 */

package org.eclipse.egf.pattern.ui.editors;

import java.io.ByteArrayInputStream;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.egf.common.helper.EMFHelper;
import org.eclipse.egf.common.helper.URIHelper;
import org.eclipse.egf.model.pattern.PatternMethod;
import org.eclipse.egf.pattern.ui.Messages;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.IPersistableElement;

/**
 * 
 * @author Thomas Guiu
 * 
 */

public class PatternMethodEditorInput implements IFileEditorInput {

    public static final String PATTERN_METHOD_ID = "methodId"; //$NON-NLS-1$

    public static final String RESSOURCE_URI = "uri"; //$NON-NLS-1$

    private final PatternPersistableElement _persistable = new PatternPersistableElement();

    private PatternMethod _method;

    private final Resource _resource;

    public PatternMethodEditorInput(Resource resource, String fragment) {
        _resource = resource;
        _method = (PatternMethod) resource.getEObject(fragment);
    }

    public boolean exists() {
        return true;
    }

    public PatternMethod getPatternMethod() {
        return _method;
    }

    public Resource getResource() {
        return _resource;
    }

    public ImageDescriptor getImageDescriptor() {
        return null;
    }

    public String getName() {
        return getPatternMethod().getName();
    }

    public IPersistableElement getPersistable() {
        return _persistable;
    }

    public String getToolTipText() {
        if (getPatternMethod() != null) {
            return getPatternMethod().getName();
        }
        return Messages.input_tooltip;
    }

    @SuppressWarnings("rawtypes")
    public Object getAdapter(Class adapter) {
        if (IFile.class == adapter) {
            return getFile();
        }
        return null;
    }

    private class PatternPersistableElement implements IPersistableElement {

        public void saveState(IMemento memento) {
            memento.putString(PATTERN_METHOD_ID, getPatternMethod().getID());
            memento.putString(RESSOURCE_URI, _resource.getURI().toString());
        }

        public String getFactoryId() {
            return PatternElementFactory.ID;
        }

    }

    public IFile getFile() {
        IProject project = EMFHelper.getProject(getResource());
        if (project == null) {
            return null;
        }
        IFile file = project.getFile(URIHelper.toPlatformProjectString(getPatternMethod().getPatternFilePath(), true));
        if (file != null && file.exists()) {
            return file;
        }
        // this is a new method so we need to create the template file
        try {
            file.create(new ByteArrayInputStream(new byte[0]), true, null);
        } catch (CoreException e) {
            /*
             * all modifications of the recources that subclipse
             * touches do happen outside of eclipse own
             * control.Resources
             * are out of synch .
             */
            // Activator.getDefault().logError(e);
        }
        return file;
    }

    public IStorage getStorage() throws CoreException {
        return getFile();
    }

}