Java tutorial
/******************************************************************************* * Copyright (c) 2010-2014 SAP AG 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: * SAP AG - initial API and implementation *******************************************************************************/ package org.eclipse.skalli.view.ext.impl.internal.infobox; import java.util.UUID; import org.eclipse.skalli.commons.UUIDList; import org.eclipse.skalli.model.Project; import org.eclipse.skalli.model.ext.misc.RelatedProjectsExt; import org.eclipse.skalli.services.Services; import org.eclipse.skalli.services.entity.EntityServices; import org.eclipse.skalli.services.project.ProjectService; import org.eclipse.skalli.services.search.SearchHit; import org.eclipse.skalli.services.search.SearchResult; import org.eclipse.skalli.services.search.SearchService; import org.eclipse.skalli.view.ext.ExtensionUtil; import org.eclipse.skalli.view.ext.InfoBox; import org.eclipse.skalli.view.ext.InfoBoxBase; import com.vaadin.terminal.ExternalResource; import com.vaadin.ui.Component; import com.vaadin.ui.CssLayout; import com.vaadin.ui.Label; import com.vaadin.ui.Layout; public class RelatedProjectsInfoBox extends InfoBoxBase implements InfoBox { private static final String STYLE_RELATEDPROJECTS_INFOBOX = "infobox-related-projects"; //$NON-NLS-1$ @Override public String getIconPath() { return "res/icons/relProjects.png"; //$NON-NLS-1$ } @Override public String getCaption() { return "Related Projects"; } @Override public String getShortName() { return "relatedProjects"; } @Override public Component getContent(Project project, ExtensionUtil util) { Layout layout = new CssLayout(); layout.addStyleName(STYLE_RELATEDPROJECTS_INFOBOX); layout.setSizeFull(); RelatedProjectsExt ext = project.getExtension(RelatedProjectsExt.class); if (ext != null) { createLabel(layout, "The following projects might also be of interest to you:"); boolean calculated = ext.getCalculated(); if (calculated) { addCalculatedContent(project, layout); } else { UUIDList ids = ext.getRelatedProjects(); ProjectService projectService = ((ProjectService) EntityServices.getByEntityClass(Project.class)); for (UUID uuid : ids) { Project relatedProject = projectService.getByUUID(uuid); if (relatedProject != null) { //project might have deleted meanwhile ExternalResource externalResource = new ExternalResource( "/projects/" + relatedProject.getProjectId()); String content = HSPACE + "<a href=\"" + externalResource.getURL() + "\">" + relatedProject.getName() + "</a>"; createLabel(layout, content); } } } } return layout; } protected void addCalculatedContent(Project project, Layout layout) { SearchService searchService = Services.getService(SearchService.class); if (searchService == null) { return; } SearchResult<Project> relatedProjects = searchService.getRelatedProjects(project, 3); if (relatedProjects.getResultCount() == 0) { createLabel(layout, HSPACE + "No matches found"); return; } for (SearchHit<Project> hit : relatedProjects.getResult()) { ExternalResource externalResource = new ExternalResource("/projects/" + hit.getEntity().getProjectId()); String content = HSPACE + "<a href=" + externalResource.getURL() + ">" + hit.getEntity().getName() + "*</a>"; createLabel(layout, content); } Label label = new Label(HSPACE + "*calculated based on similarities between the projects", Label.CONTENT_XHTML); label.setStyleName("light");//$NON-NLS-1$ layout.addComponent(label); } @Override public float getPositionWeight() { return 1.8f; } @Override public int getPreferredColumn() { return COLUMN_EAST; } @Override public boolean isVisible(Project project, String loggedInUserId) { RelatedProjectsExt ext = project.getExtension(RelatedProjectsExt.class); if (ext == null || (ext.getRelatedProjects().isEmpty() && !ext.getCalculated())) { return false; } else { return true; } } }