dynamicrefactoring.util.selection.TreeSelectionInfo.java Source code

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Here is the source code for dynamicrefactoring.util.selection.TreeSelectionInfo.java

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/*<Dynamic Refactoring Plugin For Eclipse 2.0 - Plugin that allows to perform refactorings 
on Java code within Eclipse, as well as to dynamically create and manage new refactorings>
    
Copyright (C) 2009  Laura Fuente De La Fuente
    
This file is part of Foobar
    
Foobar is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
This program 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 General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.*/
package dynamicrefactoring.util.selection;

import org.eclipse.core.resources.IProject;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jface.viewers.TreePath;
import org.eclipse.jface.viewers.TreeSelection;
import org.eclipse.ui.IWorkbenchWindow;

/**
 * Proporciona funciones capaces de determinar el tipo de elemento que se 
 * encuentra seleccionado en una ventana sobre un rbol desplegable, as como
 * otra informacin adicional relativa al mismo.
 * 
 * @author <A HREF="mailto:sfd0009@alu.ubu.es">Sonia Fuente de la Fuente</A>
 * @author <A HREF="mailto:ehp0001@alu.ubu.es">Enrique Herrero Paredes</A>
 */
public class TreeSelectionInfo extends SelectionInfo {

    /**
     * Seleccin sobre un rbol de seleccin cuya informacin se desea consultar.
     */
    private TreeSelection treeSelection;

    /**
     * Constructor.
     * 
     * @param selection seleccin actual sobre un rbol de seleccin.
     * @param window ventana de la interfaz con la que interaccionar. 
     * 
     * @throws Exception si #selection no es una seleccin sobre un rbol.
     */
    public TreeSelectionInfo(TreeSelection selection, IWorkbenchWindow window) throws Exception {

        super(selection, window);

        if (!(selection instanceof TreeSelection))
            throw new Exception(
                    Messages.TreeSelectionInfo_InvalidSelection + Messages.TreeSelectionInfo_TreeExpected + ".\n"); //$NON-NLS-1$

        treeSelection = selection;
    }

    /**
     * Determina el tipo de elemento seleccionado en una ventana.
     * Solo tiene en consideracin los tipos indicados por #typeName, #methodName 
     * y #fieldName.
     * 
     * @return el nombre completamente cualificado del tipo de elemento 
     * seleccionado, o <code>null</code> si no es ninguno de los admitidos.
     * 
     * @see SelectionInfo
     */
    @Override
    public String getSelectionType() {

        if (selectionName == null)

            selectionName = treeSelection.getFirstElement().getClass().getCanonicalName();

        return selectionName;
    }

    /**
     * Obtiene el proyecto al que pertenece el elemento seleccionado 
     * en una ventana.
     * 
     * @return el proyecto al que pertenece el elemento seleccioando.
     */
    @Override
    public IProject getProjectForSelection() {

        IJavaElement element = getJavaProjectForSelection();

        if (element != null) {
            IProject myProject = getJavaProjectForName(element.getElementName());
            return myProject;
        }

        return null;
    }

    /**
     * @see SelectionInfo#getJavaProjectForSelection()
     */
    @Override
    public IJavaProject getJavaProjectForSelection() {
        TreePath path = treeSelection.getPaths()[0].getParentPath();

        if (path.getFirstSegment() instanceof IJavaElement) {
            IJavaElement element = (IJavaElement) path.getFirstSegment();
            if (element.getElementType() == IJavaElement.JAVA_PROJECT)
                return (IJavaProject) element;
        }
        return null;
    }
}