Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2011 IBM Corporation 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: * IBM Corporation - initial API and implementation *******************************************************************************/ package ext.org.eclipse.jdt.internal.ui.preferences; import java.lang.reflect.InvocationTargetException; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IAdaptable; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.operation.IRunnableWithProgress; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.dialogs.PropertyPage; import org.eclipse.jdt.core.ClasspathContainerInitializer; import org.eclipse.jdt.core.IClasspathContainer; import org.eclipse.jdt.core.IClasspathEntry; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.IPackageFragmentRoot; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.core.JavaModelException; import patch.org.eclipse.jdt.internal.ui.JavaPlugin; import ext.org.eclipse.jdt.internal.corext.util.JavaModelUtil; import ext.org.eclipse.jdt.internal.corext.util.Messages; import ext.org.eclipse.jdt.internal.ui.IJavaHelpContextIds; import ext.org.eclipse.jdt.internal.ui.dialogs.StatusUtil; import ext.org.eclipse.jdt.internal.ui.util.ExceptionHandler; import ext.org.eclipse.jdt.internal.ui.viewsupport.BasicElementLabels; import ext.org.eclipse.jdt.internal.ui.wizards.IStatusChangeListener; import ext.org.eclipse.jdt.internal.ui.wizards.buildpaths.SourceAttachmentBlock; /** * Property page to configure a archive's JARs source attachment */ public class SourceAttachmentPropertyPage extends PropertyPage implements IStatusChangeListener { private SourceAttachmentBlock fSourceAttachmentBlock; private IPackageFragmentRoot fRoot; private IPath fContainerPath; private IClasspathEntry fEntry; public SourceAttachmentPropertyPage() { } /* * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite) */ @Override public void createControl(Composite parent) { super.createControl(parent); PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(), IJavaHelpContextIds.SOURCE_ATTACHMENT_PROPERTY_PAGE); } /* * @see PreferencePage#createContents */ @Override protected Control createContents(Composite composite) { initializeDialogUnits(composite); Control result = createPageContent(composite); Dialog.applyDialogFont(result); return result; } private Control createPageContent(Composite composite) { try { fContainerPath = null; fEntry = null; fRoot = getJARPackageFragmentRoot(); if (fRoot == null || fRoot.getKind() != IPackageFragmentRoot.K_BINARY) { return createMessageContent(composite, PreferencesMessages.SourceAttachmentPropertyPage_noarchive_message, null); } IPath containerPath = null; IJavaProject jproject = fRoot.getJavaProject(); IClasspathEntry entry = JavaModelUtil.getClasspathEntry(fRoot); if (entry.getEntryKind() == IClasspathEntry.CPE_CONTAINER) { containerPath = entry.getPath(); ClasspathContainerInitializer initializer = JavaCore .getClasspathContainerInitializer(containerPath.segment(0)); IClasspathContainer container = JavaCore.getClasspathContainer(containerPath, jproject); if (initializer == null || container == null) { return createMessageContent(composite, Messages.format(PreferencesMessages.SourceAttachmentPropertyPage_invalid_container, BasicElementLabels.getPathLabel(containerPath, false)), fRoot); } String containerName = container.getDescription(); IStatus status = initializer.getSourceAttachmentStatus(containerPath, jproject); if (status.getCode() == ClasspathContainerInitializer.ATTRIBUTE_NOT_SUPPORTED) { return createMessageContent(composite, Messages.format( PreferencesMessages.SourceAttachmentPropertyPage_not_supported, containerName), null); } if (status.getCode() == ClasspathContainerInitializer.ATTRIBUTE_READ_ONLY) { return createMessageContent(composite, Messages.format( PreferencesMessages.SourceAttachmentPropertyPage_read_only, containerName), fRoot); } entry = JavaModelUtil.findEntryInContainer(container, fRoot.getPath()); } fContainerPath = containerPath; fEntry = entry; fSourceAttachmentBlock = new SourceAttachmentBlock(this, entry); return fSourceAttachmentBlock.createControl(composite); } catch (CoreException e) { JavaPlugin.log(e); return createMessageContent(composite, PreferencesMessages.SourceAttachmentPropertyPage_noarchive_message, null); } } private Control createMessageContent(Composite composite, String message, IPackageFragmentRoot root) { Composite inner = new Composite(composite, SWT.NONE); GridLayout layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; inner.setLayout(layout); GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL); gd.widthHint = convertWidthInCharsToPixels(80); Label label = new Label(inner, SWT.LEFT + SWT.WRAP); label.setLayoutData(gd); try { if (root != null) { message = message + "\n\n" + PreferencesMessages.SourceAttachmentPropertyPage_location_path; //$NON-NLS-1$ Text location = new Text(inner, SWT.READ_ONLY | SWT.WRAP); gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL); gd.widthHint = convertWidthInCharsToPixels(80); location.setLayoutData(gd); IPath sourceAttachmentPath = root.getSourceAttachmentPath(); String locationPath = PreferencesMessages.SourceAttachmentPropertyPage_locationPath_none; if (sourceAttachmentPath != null) locationPath = sourceAttachmentPath.toString(); location.setText(locationPath); } } catch (JavaModelException e) { JavaPlugin.log(e); // don't show location } label.setText(message); return inner; } /* * @see IPreferencePage#performOk */ @Override public boolean performOk() { if (fSourceAttachmentBlock != null) { try { IClasspathEntry entry = fSourceAttachmentBlock.getNewEntry(); if (entry.equals(fEntry)) { return true; // no change } IRunnableWithProgress runnable = SourceAttachmentBlock.getRunnable(getShell(), entry, fRoot.getJavaProject(), fContainerPath, fEntry.getReferencingEntry() != null); PlatformUI.getWorkbench().getProgressService().run(true, true, runnable); } catch (InvocationTargetException e) { String title = PreferencesMessages.SourceAttachmentPropertyPage_error_title; String message = PreferencesMessages.SourceAttachmentPropertyPage_error_message; ExceptionHandler.handle(e, getShell(), title, message); return false; } catch (InterruptedException e) { // cancelled return false; } } return true; } /* * @see PreferencePage#performDefaults() */ @Override protected void performDefaults() { if (fSourceAttachmentBlock != null) { fSourceAttachmentBlock.setDefaults(); } super.performDefaults(); } private IPackageFragmentRoot getJARPackageFragmentRoot() throws CoreException { // try to find it as Java element (needed for external jars) IAdaptable adaptable = getElement(); IJavaElement elem = (IJavaElement) adaptable.getAdapter(IJavaElement.class); if (elem instanceof IPackageFragmentRoot) { return (IPackageFragmentRoot) elem; } // not on classpath or not in a java project IResource resource = (IResource) adaptable.getAdapter(IResource.class); if (resource instanceof IFile) { IProject proj = resource.getProject(); if (proj.hasNature(JavaCore.NATURE_ID)) { IJavaProject jproject = JavaCore.create(proj); return jproject.getPackageFragmentRoot(resource); } } return null; } /* * @see IStatusChangeListener#statusChanged */ public void statusChanged(IStatus status) { setValid(!status.matches(IStatus.ERROR)); StatusUtil.applyToStatusLine(this, status); } }