org.eclipse.wb.internal.swing.laf.ui.JarSelectionDialog.java Source code

Introduction

Here is the source code for org.eclipse.wb.internal.swing.laf.ui.JarSelectionDialog.java

Source

/*******************************************************************************
 * Copyright (c) 2011 Google, Inc.
 * 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:
 *    Google, Inc. - initial API and implementation
 *******************************************************************************/
package org.eclipse.wb.internal.swing.laf.ui;

import org.eclipse.wb.internal.core.DesignerPlugin;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;
import org.eclipse.ui.model.WorkbenchContentProvider;
import org.eclipse.ui.model.WorkbenchLabelProvider;

import org.apache.commons.lang.ArrayUtils;

import java.util.HashSet;

/**
 * Dialog allowing to select JAR files from workspace.
 * 
 * @author mitin_aa
 * @author lobas_av
 * @coverage swing.laf.ui
 */
public final class JarSelectionDialog extends ElementTreeSelectionDialog {
    private Object[] m_expanded;
    private Object m_selection;
    private final JarFileFilter m_filter;

    ////////////////////////////////////////////////////////////////////////////
    //
    // Constructor
    //
    ////////////////////////////////////////////////////////////////////////////
    public JarSelectionDialog(Shell parent) {
        super(parent, new WorkbenchLabelProvider(), new WorkbenchContentProvider());
        m_filter = new JarFileFilter();
        addFilter(m_filter);
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Contents
    //
    ////////////////////////////////////////////////////////////////////////////
    @Override
    protected TreeViewer createTreeViewer(Composite parent) {
        TreeViewer viewer = super.createTreeViewer(parent);
        if (m_expanded != null && m_expanded.length > 0) {
            viewer.setExpandedElements(m_expanded);
        }
        return viewer;
    }

    public void setInitialExpanded(Object[] initExpanded) {
        m_expanded = initExpanded;
    }

    @Override
    protected void updateOKStatus() {
        TreeViewer viewer = getTreeViewer();
        m_expanded = viewer.getExpandedElements();
        IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();
        m_selection = selection.getFirstElement();
        super.updateOKStatus();
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Access
    //
    ////////////////////////////////////////////////////////////////////////////
    public final IFile getSelectedJarFile() {
        Object[] selectionResult = getResult();
        if (ArrayUtils.isEmpty(selectionResult)) {
            return null;
        }
        for (Object object : selectionResult) {
            if (m_filter.select(null, null, object)) {
                return (IFile) object;
            }
        }
        return null;
    }

    public Object[] getExpandedElements() {
        return m_expanded;
    }

    public Object getSelection() {
        return m_selection;
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // @see org.eclipse.pde.internal.ui.editor.build.JARFileFilter
    //
    ////////////////////////////////////////////////////////////////////////////
    private static class JarFileFilter extends ViewerFilter {
        private final static String jarExt = "jar"; //$NON-NLS-1$
        private final HashSet<IPath> fPaths;

        //
        public JarFileFilter() {
            fPaths = new HashSet<IPath>();
        }

        @Override
        public boolean select(Viewer viewer, Object parent, Object element) {
            if (element instanceof IFile) {
                return isFileValid(((IFile) element).getProjectRelativePath());
            }
            if (element instanceof IContainer) { // i.e. IProject, IFolder
                try {
                    if (!((IContainer) element).isAccessible()) {
                        return false;
                    }
                    IResource[] resources = ((IContainer) element).members();
                    for (int i = 0; i < resources.length; i++) {
                        if (select(viewer, parent, resources[i])) {
                            return true;
                        }
                    }
                } catch (CoreException e) {
                    DesignerPlugin.log(e);
                    return false;
                }
            }
            return false;
        }

        public boolean isFileValid(IPath path) {
            String ext = path.getFileExtension();
            if (isPathValid(path) && ext != null && ext.length() != 0) {
                return ext.equals(jarExt);
            }
            return false;
        }

        public boolean isPathValid(IPath path) {
            return !fPaths.contains(path);
        }
    }
}