Java tutorial
/******************************************************************************* * Copyright (c) 2006 Sybase, Inc. and others. * * 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: * Sybase, Inc. - initial API and implementation *******************************************************************************/ package org.eclipse.jst.jsf.common.ui.internal.dialogs; import java.io.File; import java.util.Arrays; import org.eclipse.core.resources.IContainer; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.IWorkspace; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.IPath; import org.eclipse.jdt.core.IJarEntryResource; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.ui.JavaElementLabelProvider; import org.eclipse.jdt.ui.StandardJavaElementContentProvider; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.jst.jsf.common.ui.IFileFolderConstants; import org.eclipse.jst.jsf.common.ui.JSFUICommonPlugin; import org.eclipse.jst.jsf.common.ui.internal.utils.PathUtil; import org.eclipse.swt.widgets.Shell; /** * This dialog will let client to select resources that located on a * IJavaProject classpath, the client can provide a list of files suffixs to * filter. * * @author mengbo */ // TODO: Since many jar files might do nothing to do with client's selection, we // may need to provides more filter choice // to clients to exclude unnecessary jar files, such as that are located in JDK // dir. public class ResourceOnClasspathDialog extends TreeViewerSelectionDialog { // ResourcesOnClasspathDialog.statusMessage = Please select a property file private static final String STATUS_MESSAGE = JSFUICommonPlugin .getResourceString("Dialog.ResourceOnClasspathDialog.StatusMessage"); //$NON-NLS-1$ private IJavaProject _javaProject; // the suffixs of files that can be selected private String _suffixs[]; // IJMTConstants.DEFAULT_SUFFIX; private ResourceOnClasspathFilter _filter; // Client doesn't need to know it. class ResourceOnClasspathFilter extends ViewerFilter { StandardJavaElementContentProvider _javaContentProvider; /** * @param contentProvider */ public ResourceOnClasspathFilter(StandardJavaElementContentProvider contentProvider) { _javaContentProvider = contentProvider; } /** * Set the suffixs of files need to be selected. * * @param suffixs */ public void setSuffixs(String suffixs[]) { _suffixs = suffixs; } /** * @param contentProvider * The _javaContentProvider to set. */ public void setJavaContentProvider(StandardJavaElementContentProvider contentProvider) { _javaContentProvider = contentProvider; } /** * @param project * The _javaProject to set. */ public void setJavaProject(IJavaProject project) { _javaProject = project; } /* * (non-Javadoc) * * @see org.eclipse.jface.viewers.ViewerFilter#select(org.eclipse.jface.viewers.Viewer, * java.lang.Object, java.lang.Object) */ public boolean select(Viewer viewer, Object parentElement, Object element) { // TODO: This logic can be improved by add caching mechanism if (element instanceof IJavaProject) { String currentProjectName = ((IJavaProject) element).getProject().getFullPath().toString().trim(); String projectName = _javaProject.getProject().getFullPath().toString().trim(); if (projectName.equalsIgnoreCase(currentProjectName)) { return true; } return false; } else if (element instanceof IResource) { if (((_javaProject != null) && !_javaProject.isOnClasspath((IResource) element))) { return false; } if (element instanceof IFile) { if (Arrays.asList(_suffixs).contains(((IFile) element).getFileExtension())) { return true; } } return false; } if (element instanceof IJarEntryResource) { String ext = ((IJarEntryResource) element).getFullPath().getFileExtension(); if (ext != null && Arrays.asList(_suffixs).contains(ext)) { return true; } return false; } if (!(element instanceof IJavaElement)) { return false; } if (((_javaProject != null) && !_javaProject.isOnClasspath((IJavaElement) element))) { return false; } IJavaElement javaElement = (IJavaElement) element; Object[] children = null; switch (javaElement.getElementType()) { case IJavaElement.PACKAGE_FRAGMENT_ROOT: children = _javaContentProvider.getChildren(javaElement); break; case IJavaElement.IMPORT_CONTAINER: return true; case IJavaElement.PACKAGE_FRAGMENT: children = _javaContentProvider.getChildren(javaElement); break; case IJavaElement.CLASS_FILE: if (Arrays.asList(_suffixs).contains(IFileFolderConstants.EXT_CLASS)) { return true; } return false; case IJavaElement.COMPILATION_UNIT: String ext = javaElement.getPath().getFileExtension(); if (ext != null && Arrays.asList(_suffixs).contains(ext)) { return true; } return false; default: return false; } for (int i = 0; i < children.length; i++) { if (select(viewer, javaElement, children[i])) { return true; } } // Either the resouce or its children are not for displaying. return false; } } /** * Set the suffixs of files need to be selected. * * @param suffixs */ public void setSuffixs(String suffixs[]) { _suffixs = suffixs; _filter.setSuffixs(suffixs); } /** * @param parentShell * @param project */ public ResourceOnClasspathDialog(Shell parentShell, IJavaProject project) { super(parentShell, STATUS_MESSAGE); // set provider and filter StandardJavaElementContentProvider contentProvider = new StandardJavaElementContentProvider(); setContentProvider(contentProvider); setLabelProvider(new JavaElementLabelProvider()); _filter = new ResourceOnClasspathFilter(contentProvider); setFilter(_filter); // store the project _javaProject = project; } /* * (non-Javadoc) * * @see org.eclipse.ui.dialogs.SelectionDialog#getResult() */ public Object[] getResult() { Object[] objects = super.getResult(); if (objects == null || objects.length == 0) { return null; } IPath path = PathUtil.getPathOnClasspath(_javaProject, objects[0]); String result = null; if (path.segmentCount() == 0) { return new Object[] { "" }; //$NON-NLS-1$ } path = path.removeFileExtension(); result = path.toOSString(); result = result.replace(File.separatorChar, '.'); return new Object[] { result }; } /* * (non-Javadoc) * * @see org.eclipse.jst.pagedesigner.ui.common.SelectionTreeViewerDialog#isValidSelection() */ protected boolean isValidSelection(Object selection) { String extension = PathUtil.getPathOnClasspath(_javaProject, selection).getFileExtension(); return (extension != null && Arrays.asList(_suffixs).contains(extension)); } protected Object findInputElement() { Object input = ResourcesPlugin.getWorkspace(); if (input instanceof IWorkspace) { return JavaCore.create(((IWorkspace) input).getRoot()); } else if (input instanceof IContainer) { IJavaElement element = JavaCore.create((IContainer) input); if (element != null && element.exists()) { return element; } return input; } return JavaCore.create(ResourcesPlugin.getWorkspace().getRoot()); } }