Java tutorial
package com.romeikat.datamessie.core.base.ui.component; /*- * ============================LICENSE_START============================ * data.messie (core) * ===================================================================== * Copyright (C) 2013 - 2017 Dr. Raphael Romeikat * ===================================================================== * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/gpl-3.0.html>. * =============================LICENSE_END============================= */ import java.util.Collection; import java.util.Map; import org.wicketstuff.select2.Response; import com.google.common.base.Function; import com.google.common.collect.Collections2; import com.google.common.collect.Maps; import com.romeikat.datamessie.core.domain.enums.DocumentProcessingState; public class DocumentProcessingStateChoiceProvider extends AbstractChoiceProvider<DocumentProcessingState> { private static final long serialVersionUID = 1L; @Override public String getDisplayValue(final DocumentProcessingState choice) { return choice.getName(); } @Override public String getIdValue(final DocumentProcessingState choice) { return String.valueOf(choice.ordinal()); } @Override public void query(final String term, final int page, final Response<DocumentProcessingState> response) { for (final DocumentProcessingState state : getStates().values()) { final String existingTerm = state.getName().toLowerCase(); final String searchTerm = term.toLowerCase(); if (existingTerm.contains(searchTerm)) { response.add(state); } } } @Override public Collection<DocumentProcessingState> toChoices(final Collection<String> ids) { final Map<Integer, DocumentProcessingState> states = getStates(); final Function<String, DocumentProcessingState> toChoicesFunction = new Function<String, DocumentProcessingState>() { @Override public DocumentProcessingState apply(final String id) { return states.get(Integer.parseInt(id)); } }; final Collection<DocumentProcessingState> choices = Collections2.transform(ids, toChoicesFunction); return choices; } private Map<Integer, DocumentProcessingState> getStates() { final DocumentProcessingState[] states = DocumentProcessingState.values(); final Map<Integer, DocumentProcessingState> statesMap = Maps.newHashMapWithExpectedSize(states.length); for (final DocumentProcessingState state : states) { statesMap.put(state.ordinal(), state); } return statesMap; } }