/
AutocompleteDropDown.java
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/
AutocompleteDropDown.java
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package org.coderdreams.webapp.autocomplete;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import org.apache.commons.lang3.StringUtils;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.JavaScriptHeaderItem;
import org.apache.wicket.markup.head.OnLoadHeaderItem;
import org.apache.wicket.markup.html.form.DropDownChoice;
import org.apache.wicket.markup.html.form.IChoiceRenderer;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.util.ListModel;
import org.apache.wicket.request.mapper.parameter.PageParameters;
import org.apache.wicket.request.resource.PackageResourceReference;
import org.apache.wicket.spring.injection.annot.SpringBean;
import org.coderdreams.dom.BaseEntity;
import org.coderdreams.service.SearchService;
import org.coderdreams.util.EntityUtil;
public class AutocompleteDropDown<T extends BaseEntity> extends DropDownChoice<T> {
private static final long serialVersionUID = 1L;
@SpringBean private SearchService searchService;
private final SearchType searchType;
private static final PackageResourceReference JS_CODE = new PackageResourceReference(AutocompleteDropDown.class, "autocomplete_dropdown.js");
public AutocompleteDropDown(String id, IModel<T> model, SearchType searchType, IChoiceRenderer<T> renderer) {
super(id, model, Collections.emptyList(), renderer);
this.searchType = searchType;
}
@Override
public void renderHead(IHeaderResponse response) {
super.renderHead(response);
if(!isEnabledInHierarchy()) {
return;
}
response.render(JavaScriptHeaderItem.forReference(JS_CODE));
//add the init script
String suggestionsUrl = (String) urlFor(DropdownSuggestionsPage.class, new PageParameters());
String initScript = "cd_initAutocompleteDropdown('" + getMarkupId() + "', '"+suggestionsUrl+"');";
response.render(OnLoadHeaderItem.forScript(initScript));
}
@Override
protected void onComponentTag(final ComponentTag tag) {
super.onComponentTag(tag);
tag.put("search-type", searchType.toString());
tag.put("data-minimum-input-length", String.valueOf(getMinCharacters()));
tag.put("search-filters", EntityUtil.objectToJson(getFilters()));
}
protected int getMinCharacters() { return 3; }
protected AutocompleteFilters getFilters() { return null; }
@Override
public IModel<? extends List<? extends T>> getChoicesModel() {
T obj = getModel().getObject();
if(obj == null) {
return new ListModel<>(Collections.emptyList());
}
return new ListModel<>(Collections.singletonList(obj));
}
@Override
protected T convertChoiceIdToChoice(String id) {
if(StringUtils.isBlank(id)) {
return null;
}
Integer pkId = null;
try {
pkId = Integer.parseInt(id);
} catch (NumberFormatException e) {
return null;
}
Optional<T> found = searchService.getById(searchType, pkId);
return found.isPresent() ? found.get() : null;
}
@Override
protected void onConfigure() {
super.onConfigure();
setNullValid(true);
setOutputMarkupId(true);
}
}