org.kalypso.gml.ui.internal.shape.PathShapeExistsValidator.java Source code

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Here is the source code for org.kalypso.gml.ui.internal.shape.PathShapeExistsValidator.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 * 
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 * 
 *  and
 *  
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 * 
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 * 
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 *  Contact:
 * 
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *   
 *  ---------------------------------------------------------------------------*/
package org.kalypso.gml.ui.internal.shape;

import org.apache.commons.lang3.StringUtils;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.kalypso.commons.databinding.validation.TypedValidator;
import org.kalypso.gml.ui.i18n.Messages;
import org.kalypso.shape.ShapeFile;

/**
 * @author Gernot Belger
 */
public class PathShapeExistsValidator extends TypedValidator<IPath> {
    private static final String DEFAULT_MESSAGE = Messages.getString("PathShapeExistsValidator_0"); //$NON-NLS-1$

    public PathShapeExistsValidator(final int severity) {
        this(severity, DEFAULT_MESSAGE);
    }

    public PathShapeExistsValidator(final int severity, final String message) {
        super(IPath.class, severity, message);
    }

    /**
     * @see org.kalypso.gml.ui.internal.shape.TypedValidator#doValidate(java.lang.Object)
     */
    @Override
    protected IStatus doValidate(final IPath value) throws CoreException {
        if (value == null)
            return Status.OK_STATUS;

        final IPath basePath = value.removeFileExtension();
        // If path too short, return: it is not our job to validate that
        if (basePath.segmentCount() < 2)
            return Status.OK_STATUS;

        final IWorkspace workspace = ResourcesPlugin.getWorkspace();
        final IWorkspaceRoot root = workspace.getRoot();

        checkFileExists(root, basePath, ShapeFile.EXTENSION_SHP);
        checkFileExists(root, basePath, ShapeFile.EXTENSION_DBF);
        checkFileExists(root, basePath, ShapeFile.EXTENSION_SHX);

        return Status.OK_STATUS;
    }

    private void checkFileExists(final IWorkspaceRoot root, final IPath basePath, final String extension)
            throws CoreException {
        final String ext = StringUtils.substringAfter(extension, "."); //$NON-NLS-1$

        final IPath path = basePath.addFileExtension(ext);

        final IFile file = root.getFile(path);
        if (file.exists())
            fail();
    }
}