Java tutorial
/* uDig - User Friendly Desktop Internet GIS client * http://udig.refractions.net * (C) 2011, Refractions Research Inc. * * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * (http://www.eclipse.org/legal/epl-v10.html), and the Refractions BSD * License v1.0 (http://udig.refractions.net/files/bsd3-v10.html). */ package eu.udig.catalog.teradata; import static java.util.Collections.emptyMap; import java.io.File; import java.io.IOException; import java.net.URL; import net.refractions.udig.ui.PlatformGIS; import org.apache.commons.io.FileUtils; import org.eclipse.core.runtime.FileLocator; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Path; import org.eclipse.core.runtime.Platform; import org.eclipse.core.runtime.Status; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.SWTError; import org.eclipse.swt.browser.Browser; import org.eclipse.swt.browser.LocationEvent; import org.eclipse.swt.browser.LocationListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.DirectoryDialog; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.plugin.AbstractUIPlugin; import org.osgi.framework.Bundle; import org.osgi.framework.BundleContext; import ucar.unidata.io.RandomAccessFile; import eu.udig.catalog.teradata.internal.Messages; /** * The activator class controls the plug-in life cycle */ public class Activator extends AbstractUIPlugin { private static final String GEOTOOLS_LIBS_PLUGIN = "eu.udig.libs.teradata"; private static final String LICENSE_PLUGIN_ID = "eu.udig.libs.teradata.license_10.0"; static final String CONFIG_FILE_NAME = "tdgssconfig.jar"; //$NON-NLS-1$ static final String JDBC_FILE_NAME = "terajdbc4.jar"; //$NON-NLS-1$ private static final class LicenseDialog extends Dialog { private String path = System.getProperty("user.home"); private LicenseDialog(Shell parentShell) { super(parentShell); } public File getPath() { return new File(path); } protected int getShellStyle() { return SWT.RESIZE | SWT.MAX | super.getShellStyle(); } String htmlForm = "<html><head><style type='text/css'>body {font-family: Arial,Helvetica,sans-serif;font-size: 12px;background: #ffffff;}</style></head><body>%s</body</html>"; protected org.eclipse.swt.widgets.Control createDialogArea(final org.eclipse.swt.widgets.Composite parent) { Composite comp = new Composite(parent, SWT.NONE); comp.setLayoutData(new GridData(GridData.FILL_BOTH)); getShell().setText(Messages.GetDriverTitle); GridLayout layout = new GridLayout(2, false); layout.marginHeight = 0; layout.verticalSpacing = 0; comp.setLayout(layout); Control msg; try { Browser browser = new Browser(comp, SWT.NONE); browser.setText(String.format(htmlForm, Messages.GetHTMLDriverMsg)); msg = browser; browser.addLocationListener(new LocationListener() { @Override public void changing(LocationEvent event) { event.doit = false; org.eclipse.swt.program.Program.launch(event.location); } @Override public void changed(LocationEvent event) { // TODO Auto-generated method stub } }); } catch (SWTError e) { Text text = new Text(comp, SWT.MULTI | SWT.READ_ONLY | SWT.WRAP | SWT.BORDER | SWT.SHADOW_IN); text.setText(Messages.GetDriverMsg); msg = text; } GridDataFactory.fillDefaults().span(2, 1).hint(500, 200).applyTo(msg); area(path, JDBC_FILE_NAME, comp); return comp; } public Text area(String defaultPath, final String textData, final Composite comp) { final Text text1 = new Text(comp, SWT.SINGLE | SWT.BORDER | SWT.SHADOW_IN); text1.setText(defaultPath); text1.addListener(SWT.Modify, new Listener() { @Override public void handleEvent(Event event) { path = text1.getText(); updateRestart(); } }); GridDataFactory.swtDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(text1); Button button1 = new Button(comp, SWT.PUSH); button1.setText("..."); GridDataFactory.swtDefaults().align(SWT.END, SWT.CENTER).applyTo(button1); button1.addListener(SWT.Selection, new Listener() { @Override public void handleEvent(Event event) { DirectoryDialog fdialog = new DirectoryDialog(comp.getShell(), SWT.OPEN); String result = fdialog.open(); if (result != null) { text1.setText(result); } } }); return text1; } @Override protected Button createButton(Composite parent, int id, String label, boolean defaultButton) { Button button = super.createButton(parent, id, label, defaultButton); if (id == Window.OK) { button.setText("Restart"); button.setEnabled(false); } return button; } private void updateRestart() { File dir = new File(path.trim()); boolean driv = false; boolean conf = false; if (dir.exists() && dir.isDirectory()) { for (File f : dir.listFiles()) { if (f.getName().equals(JDBC_FILE_NAME)) { driv = true; } else if (f.getName().equals(CONFIG_FILE_NAME)) { conf = true; } if (driv && conf) break; } } getButton(Window.OK).setEnabled(conf && driv); } } // The plug-in ID public static final String PLUGIN_ID = "eu.udig.catalog.teradata"; //$NON-NLS-1$ // The shared instance private static Activator plugin; /** * The constructor */ public Activator() { } public void start(BundleContext context) throws Exception { super.start(context); plugin = this; } /* * (non-Javadoc) * * @see * org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext * ) */ public void stop(BundleContext context) throws Exception { plugin = null; super.stop(context); } public static boolean checkTeradataDrivers() { if (TeradataServiceExtension.getFactory().isAvailable()) { return true; } else { PlatformGIS.asyncInDisplayThread(new Runnable() { public void run() { final Shell shell = Display.getCurrent().getActiveShell(); try { final String pluginName = LICENSE_PLUGIN_ID; final File pluginsDir = findPluginsDir(); LicenseDialog dialog = new LicenseDialog(shell); if (dialog.open() == Window.CANCEL) return; File newPlugin; boolean needUserCopy; File requiredPluginDir = new File(pluginsDir, pluginName); try { newPlugin = requiredPluginDir; createPluginStructure(newPlugin); needUserCopy = false; } catch (Exception e) { newPlugin = new File(System.getProperty("user.home"), pluginName); createPluginStructure(newPlugin); needUserCopy = true; } final String dest = new File(newPlugin, "libs").getPath(); final File finalNewPlugin = newPlugin; transfer(dest, JDBC_FILE_NAME, dialog); transfer(dest, CONFIG_FILE_NAME, dialog); if (needUserCopy) { while (!requiredPluginDir.exists()) { Dialog dialog2 = new Dialog(shell) { protected Control createDialogArea(Composite parent) { Control comp; try { Browser browser = new Browser(parent, SWT.NONE); String mainMessage = String.format(Messages.GetHTMLCopyPluginMsg, finalNewPlugin.getParentFile().getAbsolutePath(), finalNewPlugin.getAbsolutePath(), pluginsDir.getAbsolutePath()); browser.setText(mainMessage); browser.addLocationListener(new LocationListener() { @Override public void changing(LocationEvent event) { event.doit = false; org.eclipse.swt.program.Program.launch(event.location); } @Override public void changed(LocationEvent event) { } }); comp = browser; } catch (SWTError e) { Text text = new Text(parent, SWT.MULTI | SWT.READ_ONLY | SWT.WRAP | SWT.BORDER | SWT.SHADOW_IN); String mainMessage = String.format(Messages.GetDriverMsg, finalNewPlugin.getAbsolutePath(), pluginsDir.getAbsolutePath()); text.setText(mainMessage); comp = text; } GridDataFactory.fillDefaults().hint(500, 200).applyTo(comp); return comp; }; @Override protected Button createButton(Composite parent, int id, String label, boolean defaultButton) { Button button = super.createButton(parent, id, label, defaultButton); if (id == Window.OK) button.setText("Restart"); return button; } }; if (dialog2.open() == Window.CANCEL) return; } } String cmd = buildCommandLine(shell); if (cmd != null) { System.setProperty(PROP_EXIT_CODE, Integer.toString(24)); System.setProperty(PROP_EXIT_DATA, cmd); PlatformUI.getWorkbench().getActiveWorkbenchWindow().getWorkbench().restart(); //PlatformUI.getWorkbench().restart(); } } catch (IOException e1) { throw new RuntimeException(e1); } } public File findPluginsDir() throws IOException { Bundle bundle = Platform.getBundle(GEOTOOLS_LIBS_PLUGIN); String filePath = FileLocator.toFileURL(FileLocator.find(bundle, new Path("gtlib"), emptyMap())) .getFile(); return new File(filePath).getParentFile().getParentFile(); } private void transfer(String dest, String driver, LicenseDialog dialog) throws IOException { RandomAccessFile out = null; RandomAccessFile in = null; try { String fromPath = new File(dialog.getPath(), driver).getPath(); String toPath = new File(dest, driver).getPath(); out = new RandomAccessFile(toPath, "rw"); in = new RandomAccessFile(fromPath.trim(), "r"); out.seek(0); byte[] cs = new byte[(int) in.length()]; in.readFully(cs); out.write(cs); } finally { if (out != null) try { out.close(); } catch (IOException e1) { throw new RuntimeException(e1); } if (in != null) try { in.close(); } catch (IOException e1) { throw new RuntimeException(e1); } } } }, true); return false; } } protected static void createPluginStructure(File newPlugin) throws IOException { Bundle teradataLibsBundle = Platform.getBundle(PLUGIN_ID); URL manifest = FileLocator .toFileURL(FileLocator.find(teradataLibsBundle, new Path("License-MANIFEST.MF"), emptyMap())); File libsDir = new File(newPlugin, "libs"); libsDir.mkdirs(); File metaInf = new File(libsDir.getParentFile(), "META-INF"); FileUtils.copyURLToFile(manifest, new File(metaInf, "MANIFEST.MF")); } private static final String PROP_VM = "eclipse.vm"; //$NON-NLS-1$ private static final String PROP_VMARGS = "eclipse.vmargs"; //$NON-NLS-1$ private static final String PROP_COMMANDS = "eclipse.commands"; //$NON-NLS-1$ private static final String PROP_EXIT_CODE = "eclipse.exitcode"; //$NON-NLS-1$ private static final String PROP_EXIT_DATA = "eclipse.exitdata"; //$NON-NLS-1$ private static final String CMD_DATA = "-clean"; //$NON-NLS-1$ private static final String CMD_VMARGS = "-vmargs"; //$NON-NLS-1$ private static final String NEW_LINE = "\n"; //$NON-NLS-1$ /** * Create and return a string with command line options for eclipse.exe that * will launch a new workbench that is the same as the currently running * one, but using the argument directory as its workspace. * * @param workspace * the directory to use as the new workspace * @return a string of command line options or null on error */ private static String buildCommandLine(Shell shell) { String property = System.getProperty(PROP_VM); if (property == null) { MessageDialog.openError(shell, "Restart Error", "Unable to determine the correct JVM to use. Please restart manually using the udig-clean script (in the uDig install directory)"); return null; } StringBuffer result = new StringBuffer(512); result.append(property); result.append(NEW_LINE); // append the vmargs and commands. Assume that these already end in \n String vmargs = System.getProperty(PROP_VMARGS); if (vmargs != null) { result.append(vmargs); } result.append("-Declipse.refreshBundles=true\n"); // append the rest of the args, replacing or adding -data as required property = System.getProperty(PROP_COMMANDS); if (property == null) { result.append(CMD_DATA); result.append(NEW_LINE); } else { result.append(property); result.append(CMD_DATA); result.append(NEW_LINE); } // put the vmargs back at the very end (the eclipse.commands property // already contains the -vm arg) if (vmargs != null) { result.append(CMD_VMARGS); result.append(NEW_LINE); result.append(vmargs); result.append("-Declipse.refreshBundles=true"); } return result.toString(); } /** * Returns the shared instance * * @return the shared instance */ public static Activator getDefault() { return plugin; } public static void log(String message, Throwable t) { int status = t instanceof Exception || message != null ? IStatus.ERROR : IStatus.WARNING; getDefault().getLog().log(new Status(status, PLUGIN_ID, IStatus.OK, message, t)); } }