Java tutorial
/******************************************************************************* * Copyright Technophobia Ltd 2012 * * This file is part of the Substeps Eclipse Plugin. * * The Substeps Eclipse Plugin is free software: you can redistribute it and/or modify * it under the terms of the Eclipse Public License v1.0. * * The Substeps Eclipse Plugin 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 * Eclipse Public License for more details. * * You should have received a copy of the Eclipse Public License * along with the Substeps Eclipse Plugin. If not, see <http://www.eclipse.org/legal/epl-v10.html>. ******************************************************************************/ package com.technophobia.substeps.junit.launcher.tab.component; import java.text.MessageFormat; import java.util.Collection; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Path; import org.eclipse.jdt.core.IJavaModel; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.ui.JavaElementLabelProvider; import org.eclipse.jface.viewers.ILabelProvider; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.dialogs.ElementListSelectionDialog; import com.technophobia.eclipse.transformer.Callback; import com.technophobia.substeps.FeatureRunnerPlugin; import com.technophobia.substeps.junit.launcher.model.SubstepsLaunchModel; import com.technophobia.substeps.junit.ui.SubstepsFeatureMessages; import com.technophobia.substeps.supplier.Supplier; public class ProjectComponent extends AbstractTabComponent implements Supplier<IProject> { private Text projectText = null; public ProjectComponent(final Callback onChangeCallback) { super(onChangeCallback, null); } @Override public void initializeFrom(final SubstepsLaunchModel model) { projectText.setText(model.getProjectName()); } @Override public void saveTo(final SubstepsLaunchModel model) { if (projectText != null) { model.setProjectName(projectText.getText().trim()); } } @Override public void setDefaultOn(final SubstepsLaunchModel model, final IResource currentResource) { final IProject project = currentResource.getProject(); model.setProjectName(project.getName()); } @Override public void validate(final Collection<String> errorMessageList) { final String projectName = projectText.getText().trim(); if (projectName.length() == 0) { errorMessageList.add(SubstepsFeatureMessages.SubstepsLaunchConfigurationTab_error_projectnotdefined); } final IStatus status = ResourcesPlugin.getWorkspace().validatePath(IPath.SEPARATOR + projectName, IResource.PROJECT); if (!status.isOK() || !Path.ROOT.isValidSegment(projectName)) { errorMessageList.add(MessageFormat.format( SubstepsFeatureMessages.SubstepsLaunchConfigurationTab_error_invalidProjectName, projectName)); return; } final IProject project = getWorkspaceRoot().getProject(projectName); if (!project.exists()) { errorMessageList.add(SubstepsFeatureMessages.SubstepsLaunchConfigurationTab_error_projectnotexists); return; } try { if (!project.hasNature(JavaCore.NATURE_ID)) { errorMessageList.add(SubstepsFeatureMessages.SubstepsLaunchConfigurationTab_error_notJavaProject); return; } } catch (final CoreException e) { FeatureRunnerPlugin.log(e); } } @Override public void create(final Composite comp) { final Label projectLabel = new Label(comp, SWT.NONE); projectLabel.setText(SubstepsFeatureMessages.SubstepsLaunchConfigurationTab_label_project_location); GridData gd = new GridData(); gd.horizontalIndent = 25; gd.verticalIndent = 5; projectLabel.setLayoutData(gd); projectText = new Text(comp, SWT.SINGLE | SWT.BORDER); gd = new GridData(GridData.FILL_HORIZONTAL); gd.verticalIndent = 5; projectText.setLayoutData(gd); projectText.addModifyListener(new ModifyListener() { @Override public void modifyText(final ModifyEvent evt) { onChange(); } }); final Button projectButton = new Button(comp, SWT.PUSH); projectButton.setText(SubstepsFeatureMessages.SubstepsLaunchConfigurationTab_browse_project_location); projectButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent evt) { final String projectName = handleProjectButtonSelected(); if (projectName != null && !projectName.isEmpty()) { projectText.setText(projectName); } } }); } @Override protected boolean isValid() { return !projectText.getText().trim().isEmpty(); } @Override public void enableControls() { projectText.setEnabled(true); } @Override public void disableControls() { projectText.setEnabled(false); } @Override public IProject get() { return ResourcesPlugin.getWorkspace().getRoot().getProject(projectText.getText().trim()); } /* * Show a dialog that lets the user select a folder or substeps file. */ private String handleProjectButtonSelected() { final IJavaProject project = chooseJavaProject(); if (project == null) { return ""; } return project.getElementName(); } /* * Realize a Java Project selection dialog and return the first selected * project, or null if there was none. */ private IJavaProject chooseJavaProject() { IJavaProject[] projects; try { projects = JavaCore.create(getWorkspaceRoot()).getJavaProjects(); } catch (final JavaModelException e) { FeatureRunnerPlugin.log(e); projects = new IJavaProject[0]; } final ILabelProvider labelProvider = new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_DEFAULT); final ElementListSelectionDialog dialog = new ElementListSelectionDialog(projectText.getShell(), labelProvider); dialog.setTitle(SubstepsFeatureMessages.SubstepsLaunchConfigurationTab_projectdialog_title); dialog.setMessage(SubstepsFeatureMessages.SubstepsLaunchConfigurationTab_projectdialog_message); dialog.setElements(projects); final IJavaProject javaProject = getJavaProject(); if (javaProject != null) { dialog.setInitialSelections(new Object[] { javaProject }); } if (dialog.open() == Window.OK) { return (IJavaProject) dialog.getFirstResult(); } return null; } /* * Return the IJavaProject corresponding to the project name in the project * name text field, or null if the text does not match a project name. */ private IJavaProject getJavaProject() { final String projectName = projectText.getText().trim(); if (projectName.length() < 1) { return null; } return getJavaModel().getJavaProject(projectName); } /* * Convenience method to get access to the java model. */ private IJavaModel getJavaModel() { return JavaCore.create(getWorkspaceRoot()); } }