Java tutorial
package de.metas.ui.web.pickingV2.packageable; import java.util.Collection; import com.google.common.collect.ImmutableList; import com.google.common.collect.ImmutableListMultimap; import com.google.common.collect.ImmutableMap; import com.google.common.collect.ImmutableSet; import com.google.common.collect.Maps; import de.metas.inoutcandidate.api.ShipmentScheduleId; import de.metas.ui.web.window.datatypes.DocumentId; import de.metas.util.GuavaCollectors; import lombok.NonNull; /* * #%L * metasfresh-webui-api * %% * Copyright (C) 2018 metas GmbH * %% * 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 2 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-2.0.html>. * #L% */ final class PackageableRowsIndex { public static PackageableRowsIndex of(final Collection<PackageableRow> rows) { return new PackageableRowsIndex(rows); } private final ImmutableMap<DocumentId, PackageableRow> rowsById; private final ImmutableListMultimap<ShipmentScheduleId, PackageableRow> rowsByShipmentScheduleId; private PackageableRowsIndex(final Collection<PackageableRow> rows) { rowsById = Maps.uniqueIndex(rows, PackageableRow::getId); rowsByShipmentScheduleId = rows.stream() .flatMap(row -> row.getShipmentScheduleIds().stream() .map(shipmentScheduleId -> GuavaCollectors.entry(shipmentScheduleId, row))) .collect(GuavaCollectors.toImmutableListMultimap()); } public ImmutableMap<DocumentId, PackageableRow> getRowsIndexedById() { return rowsById; } private ImmutableList<PackageableRow> getRowsByShipmentScheduleId( @NonNull final ShipmentScheduleId shipmentScheduleId) { return rowsByShipmentScheduleId.get(shipmentScheduleId); } public ImmutableSet<DocumentId> getRowIdsByShipmentScheduleId( @NonNull final ShipmentScheduleId shipmentScheduleId) { return getRowsByShipmentScheduleId(shipmentScheduleId).stream().map(PackageableRow::getId) .collect(ImmutableSet.toImmutableSet()); } }