Java tutorial
/** * Copyright 2012 Universitat Pompeu Fabra. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * */ package org.onexus.website.api.pages.browser; import org.apache.commons.collections.CollectionUtils; import org.apache.commons.collections.Predicate; import org.apache.commons.lang3.StringUtils; import org.apache.wicket.MetaDataKey; import org.apache.wicket.request.cycle.RequestCycle; import org.apache.wicket.request.mapper.parameter.PageParameters; import org.apache.wicket.util.string.StringValue; import org.onexus.collection.api.ICollectionManager; import org.onexus.collection.api.query.Filter; import org.onexus.collection.api.query.Query; import org.onexus.collection.api.utils.QueryUtils; import org.onexus.resource.api.ORI; import org.onexus.website.api.WebsiteApplication; import org.onexus.website.api.pages.ISelectionContributor; import org.onexus.website.api.pages.PageStatus; import org.onexus.website.api.utils.visible.VisiblePredicate; import org.onexus.website.api.widgets.WidgetConfig; import org.onexus.website.api.widgets.WidgetStatus; import org.onexus.website.api.widgets.selection.FilterConfig; import org.onexus.website.api.widgets.selection.MultipleEntitySelection; import javax.inject.Inject; import java.util.ArrayList; import java.util.Collection; import java.util.Collections; import java.util.Comparator; import java.util.LinkedHashMap; import java.util.List; import java.util.Set; public class BrowserPageStatus extends PageStatus<BrowserPageConfig> implements ISelectionContributor { private String base; private String currentTabId; private String currentView; private List<IEntitySelection> selections = new ArrayList<IEntitySelection>(); private List<FilterConfig> currentFilters = new ArrayList<FilterConfig>(); @Inject private ICollectionManager collectionManager; public BrowserPageStatus() { } public BrowserPageStatus(String id) { super(id); } @Override public List<WidgetStatus> getActiveWidgetStatuses(ORI parentOri) { BrowserPageConfig pageConfig = getConfig(); TabConfig tabConfig = pageConfig.getTab(currentTabId); ViewConfig viewConfig = tabConfig.getView(currentView); List<WidgetConfig> widgetConfigs = new ArrayList<WidgetConfig>(); Predicate visible = new VisiblePredicate(parentOri, getEntitySelections()); CollectionUtils.select(ViewConfig.getSelectedWidgetConfigs(pageConfig, viewConfig.getLeft(), viewConfig.getTop(), viewConfig.getTopRight(), viewConfig.getMain()), visible, widgetConfigs); List<WidgetStatus> statuses = new ArrayList<WidgetStatus>(); for (WidgetConfig config : widgetConfigs) { WidgetStatus status = getWidgetStatus(config.getId()); if (status != null) { statuses.add(status); } } return statuses; } public String getBase() { if (base == null) { base = getConfig().getBase(); } return base; } public ORI getORI() { return getConfig().getWebsiteConfig().getORI(); } public String getCurrentTabId() { return currentTabId; } public void setCurrentTabId(String currentTabId) { if (currentTabId != null && !currentTabId.equals(this.currentTabId)) { BrowserPageStatus defaultStatus = getConfig().getDefaultStatus(); if (defaultStatus == null) { defaultStatus = getConfig().createEmptyStatus(); } this.currentView = defaultStatus.getCurrentView(); this.currentFilters = new ArrayList<FilterConfig>(); } this.currentTabId = currentTabId; } public String getCurrentView() { return currentView; } public void setCurrentView(String currentView) { this.currentView = currentView; } public void setBase(String baseURI) { this.base = baseURI; } public List<IEntitySelection> getEntitySelections() { return selections; } public List<FilterConfig> getCurrentFilters() { if (currentFilters == null) { currentFilters = new ArrayList<FilterConfig>(0); } return currentFilters; } public void addEntitySelection(IEntitySelection selection) { selections.add(selection); } public void removeEntitySelection(IEntitySelection selection) { selections.remove(selection); } public static MetaDataKey<ISelectionContributor> SELECTIONS = new MetaDataKey<ISelectionContributor>() { }; @Override public void beforeQueryBuild(Query query) { RequestCycle.get().setMetaData(SELECTIONS, this); if (!StringUtils.isEmpty(getBase())) { query.setOn(new ORI(query.getOn(), getBase())); } } @Override public void afterQueryBuild(Query query) { // General entity selections if (getEntitySelections() != null) { for (IEntitySelection fe : getEntitySelections()) { if (getCollectionManager().isLinkable(query, fe.getSelectionCollection().toAbsolute(query.getOn()))) { Filter filter = fe.buildFilter(query); QueryUtils.and(query, filter); fe.setEnable(true); } else { fe.setEnable(false); } } } // Current tab filters MultipleEntitySelection filterCompiler = new MultipleEntitySelection(); for (FilterConfig filterConfig : getCurrentFilters()) { filterCompiler.setFilterConfig(filterConfig); Filter filter = filterCompiler.buildFilter(query); QueryUtils.and(query, filter); } } @Override public void onQueryBuild(Query query) { } private ICollectionManager getCollectionManager() { if (collectionManager == null) { WebsiteApplication.inject(this); } return collectionManager; } @Override public void encodeParameters(PageParameters parameters, String keyPrefix, boolean global) { BrowserPageStatus defaultStatus = getConfig().getDefaultStatus(); if (defaultStatus == null) { defaultStatus = getConfig().createEmptyStatus(); } if (global || !StringUtils.equals(currentTabId, defaultStatus.getCurrentTabId())) { if (currentTabId == null) { currentTabId = defaultStatus.getCurrentTabId(); } if (currentTabId != null) { parameters.add(keyPrefix + "tab", currentTabId); } } if (global || !StringUtils.equals(currentView, defaultStatus.getCurrentView()) && getConfig().getTab(currentTabId).getViews().size() > 1) { if (currentView == null) { currentView = defaultStatus.getCurrentView(); } if (currentView != null) { parameters.add(keyPrefix + "view", currentView); } } ORI parentOri = getORI(); for (IEntitySelection filter : getEntitySelections()) { if (filter instanceof SingleEntitySelection) { parameters.add(keyPrefix + "f", filter.toUrlParameter(global, parentOri)); } else { parameters.add(keyPrefix + "fc", filter.toUrlParameter(global, parentOri)); } } super.encodeParameters(parameters, keyPrefix, global); } @Override public void decodeParameters(PageParameters parameters, String keyPrefix) { StringValue currentTabId = parameters.get(keyPrefix + "tab"); if (!currentTabId.isEmpty()) { this.currentTabId = currentTabId.toString(); // Check that is a valid tabId if (getConfig().getTab(this.currentTabId) == null) { // Look for the more similar tab id List<TabConfig> tabs = new ArrayList<TabConfig>(getConfig().getTabs()); Collections.sort(tabs, new Comparator<TabConfig>() { @Override public int compare(TabConfig o1, TabConfig o2) { Integer v1 = StringUtils.getLevenshteinDistance(BrowserPageStatus.this.currentTabId, o1.getId()); Integer v2 = StringUtils.getLevenshteinDistance(BrowserPageStatus.this.currentTabId, o2.getId()); return v1.compareTo(v2); } }); this.currentTabId = tabs.get(0).getId(); } } StringValue currentView = parameters.get(keyPrefix + "view"); if (!currentView.isEmpty()) { this.currentView = currentView.toString(); // Check that is a valid currentView if (getConfig().getTab(this.currentTabId).getView(this.currentView) == null) { // Look for the more similar view id List<ViewConfig> views = new ArrayList<ViewConfig>( getConfig().getTab(this.currentTabId).getViews()); if (views.size() > 1) { Collections.sort(views, new Comparator<ViewConfig>() { @Override public int compare(ViewConfig o1, ViewConfig o2) { Integer v1 = StringUtils.getLevenshteinDistance(BrowserPageStatus.this.currentView, o1.getTitle()); Integer v2 = StringUtils.getLevenshteinDistance(BrowserPageStatus.this.currentView, o2.getTitle()); return v1.compareTo(v2); } }); } this.currentView = views.get(0).getTitle(); } } selections = new ArrayList<IEntitySelection>(); List<StringValue> values = parameters.getValues(keyPrefix + "f"); if (!values.isEmpty()) { for (StringValue value : values) { SingleEntitySelection fe = new SingleEntitySelection(); fe.loadUrlPrameter(value.toString()); addEntitySelection(fe); } } values = parameters.getValues(keyPrefix + "fc"); if (!values.isEmpty()) { for (StringValue value : values) { MultipleEntitySelection fe = new MultipleEntitySelection(); fe.loadUrlPrameter(value.toString()); addEntitySelection(fe); } } super.decodeParameters(parameters, keyPrefix); //To change body of overridden methods use File | Settings | File Templates. } }