eu.geclipse.ui.wizards.GenericVoWizardPage.java Source code

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Here is the source code for eu.geclipse.ui.wizards.GenericVoWizardPage.java

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/*****************************************************************************
 * Copyright (c) 2006-2008 g-Eclipse Consortium 
 * 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
 *
 * Initial development of the original code was made for the
 * g-Eclipse project founded by European Union
 * project number: FP6-IST-034327  http://www.geclipse.eu/
 *
 * Contributors:
 *    Mathias Stuempert - initial API and implementation
 *****************************************************************************/

package eu.geclipse.ui.wizards;

import java.net.URL;
import java.util.regex.Pattern;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

import eu.geclipse.core.model.GridModel;
import eu.geclipse.core.model.impl.GenericVirtualOrganization;
import eu.geclipse.core.model.impl.GenericVoCreator;
import eu.geclipse.ui.internal.Activator;

/**
 * Wizard page for the {@link GenericVirtualOrganization}.
 */
public class GenericVoWizardPage extends WizardPage {

    private GenericVirtualOrganization initialVo;

    private Text nameText;

    /** A pattern for matching the VO name */
    private Pattern voNamePattern = Pattern.compile("^[\\w.-]+$"); //$NON-NLS-1$

    /**
     * Standard constructor.
     */
    public GenericVoWizardPage() {
        super("genericVOPage", //$NON-NLS-1$
                "Generic VO", null);
        setDescription("Specify the attributes of your VO");
        URL imgUrl = Activator.getDefault().getBundle().getEntry("icons/wizban/vo_wiz.gif"); //$NON-NLS-1$
        setImageDescriptor(ImageDescriptor.createFromURL(imgUrl));
    }

    public void createControl(final Composite parent) {

        GridData gData;

        Composite mainComp = new Composite(parent, SWT.NONE);
        mainComp.setLayout(new GridLayout(2, false));

        Label nameLabel = new Label(mainComp, SWT.NULL);
        nameLabel.setText("&VO Name:");
        gData = new GridData();
        nameLabel.setLayoutData(gData);

        this.nameText = new Text(mainComp, SWT.BORDER);
        gData = new GridData(GridData.FILL_HORIZONTAL);
        gData.grabExcessHorizontalSpace = true;
        this.nameText.setLayoutData(gData);

        if (this.initialVo != null) {
            initVo(this.initialVo);
        }

        setControl(mainComp);

    }

    public IStatus apply(final GenericVoCreator creator) {

        IStatus result = Status.OK_STATUS;

        String name = this.nameText.getText();
        if (!validateVoName(name)) {
            result = new Status(IStatus.ERROR, Activator.PLUGIN_ID, "You have to specify a valid VO name");
        } else if ((this.initialVo == null) && (GridModel.getVoManager().findChild(name) != null)) {
            result = new Status(IStatus.ERROR, Activator.PLUGIN_ID, "A VO with the same name already exists");
        } else {
            creator.setVoName(name);
        }

        return result;

    }

    /**
     * Initializes the controls of this wizard page with the attributes
     * of the specified VO.
     * 
     * @param vo The VO whose attributes should be set to the page's controls.
     */
    protected void initVo(final GenericVirtualOrganization vo) {
        this.nameText.setText(vo != null ? vo.getName() : ""); //$NON-NLS-1$
        this.nameText.setEnabled(vo == null);
    }

    /**
     * Set the specified VO as initial VO. This means that the controls
     * of the page will be initialized with the attributes of the specified
     * VO.
     * 
     * @param vo The initial VO.
     */
    protected void setInitialVo(final GenericVirtualOrganization vo) {
        this.initialVo = vo;
    }

    /**
     * Helper method to validate the VO name entered by the user.
     * 
     * @param voName the VO name to validate
     * @return true if the VO name matches the allowed pattern
     */
    private boolean validateVoName(final String voName) {
        return this.voNamePattern.matcher(voName).matches();
    }

}