Java tutorial
/******************************************************************************* * Copyright (c) 2013 AGETO Service GmbH 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: * Gunnar Wagenknecht - initial API and implementation *******************************************************************************/ package org.eclipse.gyrex.admin.ui.logback.internal; import java.util.ArrayList; import java.util.List; import org.eclipse.gyrex.admin.ui.adapter.AdapterUtil; import org.eclipse.gyrex.admin.ui.adapter.ImageAdapter; import org.eclipse.gyrex.admin.ui.internal.widgets.PatternFilter; import org.eclipse.gyrex.admin.ui.internal.wizards.dialogfields.DialogField; import org.eclipse.gyrex.admin.ui.internal.wizards.dialogfields.IDialogFieldListener; import org.eclipse.gyrex.admin.ui.internal.wizards.dialogfields.ITreeListAdapter; import org.eclipse.gyrex.admin.ui.internal.wizards.dialogfields.LayoutUtil; import org.eclipse.gyrex.admin.ui.internal.wizards.dialogfields.StringDialogField; import org.eclipse.gyrex.admin.ui.internal.wizards.dialogfields.TreeListDialogField; import org.eclipse.gyrex.common.identifiers.IdHelper; import org.eclipse.gyrex.logback.config.internal.AppenderProviderRegistry; import org.eclipse.gyrex.logback.config.internal.LogbackConfigActivator; import org.eclipse.gyrex.logback.config.model.Appender; import org.eclipse.gyrex.logback.config.spi.AppenderProvider; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.resource.LocalResourceManager; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.widgets.Composite; import org.apache.commons.lang.StringUtils; /** * Page for selecting the appender type and entering appender name. */ public class AppenderWizardPage extends WizardPage { /** serialVersionUID */ private static final long serialVersionUID = 1L; private final LabelProvider appenderTreeLabelProvider = new LabelProvider() { private static final long serialVersionUID = 1L; private LocalResourceManager resourceManager; private Image createImage(final ImageDescriptor descriptor) { if (descriptor == null) return null; if (resourceManager == null) { resourceManager = new LocalResourceManager(JFaceResources.getResources()); } return resourceManager.createImage(descriptor); } @Override public void dispose() { super.dispose(); if (resourceManager != null) { resourceManager.dispose(); resourceManager = null; } } @Override public Image getImage(final Object element) { final ImageAdapter adapter = AdapterUtil.getAdapter(element, ImageAdapter.class); if (adapter != null) return createImage(adapter.getImageDescriptor(element)); return super.getImage(element); }; @Override public String getText(final Object element) { if (element instanceof AppenderType) return ((AppenderType) element).getName(); return super.getText(element); }; }; private final ITreeListAdapter appenderTreeListAdapter = new ITreeListAdapter() { @Override public void customButtonPressed(final TreeListDialogField field, final int index) { // no-op } @Override public void doubleClicked(final TreeListDialogField field) { // no-op } @Override public Object[] getChildren(final TreeListDialogField field, final Object element) { return new Object[0]; } @Override public Object getParent(final TreeListDialogField field, final Object element) { return null; } @Override public boolean hasChildren(final TreeListDialogField field, final Object element) { return false; } @Override public void keyPressed(final TreeListDialogField field, final KeyEvent event) { // no-op } @Override public void selectionChanged(final TreeListDialogField field) { validate(); } }; private final TreeListDialogField appenderTypeField = new TreeListDialogField(appenderTreeListAdapter, null, appenderTreeLabelProvider, new PatternFilter()); private final StringDialogField nameField = new StringDialogField(); private final Appender appender; protected AppenderWizardPage(final Appender appender) { super("type"); this.appender = appender; setTitle("Appender"); setDescription("Configure the appender basics (such as name and type)."); setPageComplete(false); } @Override public void createControl(final Composite parent) { final Composite composite = new Composite(parent, SWT.NONE); composite.setLayout(GridLayoutFactory.fillDefaults().create()); composite.setLayoutData(GridDataFactory.fillDefaults() .minSize(convertVerticalDLUsToPixels(200), convertHorizontalDLUsToPixels(400)).create()); setControl(composite); nameField.setLabelText("Name:"); appenderTypeField.setLabelText("Type:"); appenderTypeField.setViewerComparator(new ViewerComparator()); final IDialogFieldListener validateListener = new IDialogFieldListener() { @Override public void dialogFieldChanged(final DialogField field) { validate(); } }; nameField.setDialogFieldListener(validateListener); appenderTypeField.setDialogFieldListener(validateListener); LayoutUtil.doDefaultLayout(composite, new DialogField[] { nameField, appenderTypeField }, false); LayoutUtil.setHorizontalGrabbing(nameField.getTextControl(null)); LayoutUtil.setHorizontalGrabbing(appenderTypeField.getTreeControl(null)); final List<AppenderType> types = new ArrayList<>(); final AppenderProviderRegistry registry = LogbackConfigActivator.getInstance() .getAppenderProviderRegistry(); for (final AppenderProvider provider : registry.getTracked().values()) { for (final String typeId : provider.getProvidedTypeIds()) { types.add(new AppenderType(typeId, registry.getName(typeId), provider)); } } appenderTypeField.setElements(types); if (appender != null) { nameField.setText(appender.getName()); for (final AppenderType type : types) { if (appender.getTypeId().equals(type.getId())) { appenderTypeField.selectElements(new StructuredSelection(type)); break; } } appenderTypeField.setEnabled(false); } } @Override public String getName() { return StringUtils.trimToNull(nameField.getText()); } private void setAppenderType(final AppenderType type) { final AddEditAppenderWizard wizard = (AddEditAppenderWizard) getWizard(); if (type != null) { wizard.initializeCurrentAppenderConfigurationSession(type.getId(), type.getName(), type.getWizardAdapter()); } else { wizard.clearCurrentAppenderConfigurationSession(); } } void validate() { final String name = getName(); if (name == null) { setMessage("Please enter an appender name.", INFORMATION); setPageComplete(false); return; } else if (!IdHelper.isValidId(name)) { setMessage( "The entered appender name is invalid. It may only contain ASCII chars a-z, 0-9, '.', '-' and/or '_'.", IMessageProvider.ERROR); setPageComplete(false); return; } final List<Object> selectedElements = appenderTypeField.getSelectedElements(); if (selectedElements.size() != 1) { setMessage("Please select an appender to use.", INFORMATION); setPageComplete(false); return; } setAppenderType((AppenderType) selectedElements.get(0)); setMessage(null); setPageComplete(true); } }