de.metas.ui.web.process.view.ViewActionDescriptorsList.java Source code

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Here is the source code for de.metas.ui.web.process.view.ViewActionDescriptorsList.java

Source

package de.metas.ui.web.process.view;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Stream;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;

import de.metas.ui.web.exceptions.EntityNotFoundException;
import de.metas.ui.web.process.ViewAsPreconditionsContext;
import de.metas.ui.web.process.descriptor.WebuiRelatedProcessDescriptor;
import lombok.ToString;

/*
 * #%L
 * metasfresh-webui-api
 * %%
 * Copyright (C) 2017 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%
 */

/**
 * All {@link ViewActionDescriptor}s for a view class.
 *
 * @author metas-dev <dev@metasfresh.com>
 *
 */
@ToString
public final class ViewActionDescriptorsList {
    public static final ViewActionDescriptorsList of(final List<ViewActionDescriptor> actions) {
        if (actions.isEmpty()) {
            return ViewActionDescriptorsList.EMPTY;
        }

        final ImmutableMap<String, ViewActionDescriptor> viewActionsByActionId = Maps.uniqueIndex(actions,
                ViewActionDescriptor::getActionId);
        return new ViewActionDescriptorsList(viewActionsByActionId);
    }

    public static final ViewActionDescriptorsList EMPTY = new ViewActionDescriptorsList(ImmutableMap.of());

    private final ImmutableMap<String, ViewActionDescriptor> viewActionsByActionId;

    private ViewActionDescriptorsList(final ImmutableMap<String, ViewActionDescriptor> viewActionsByActionId) {
        this.viewActionsByActionId = viewActionsByActionId;
    }

    public ViewActionDescriptorsList mergeWith(ViewActionDescriptorsList actionsToAdd) {
        if (actionsToAdd == null || actionsToAdd.viewActionsByActionId.isEmpty()) {
            return this;
        }

        if (this.viewActionsByActionId.isEmpty()) {
            return actionsToAdd;
        }

        final Map<String, ViewActionDescriptor> newViewActionsByActionId = new HashMap<>(
                this.viewActionsByActionId);
        newViewActionsByActionId.putAll(actionsToAdd.viewActionsByActionId);
        return new ViewActionDescriptorsList(ImmutableMap.copyOf(newViewActionsByActionId));
    }

    public ViewActionDescriptor getAction(final String actionId) {
        final ViewActionDescriptor action = viewActionsByActionId.get(actionId);
        if (action == null) {
            throw new EntityNotFoundException("No view action found for id: " + actionId);
        }
        return action;
    }

    public Stream<WebuiRelatedProcessDescriptor> streamDocumentRelatedProcesses(
            final ViewAsPreconditionsContext viewContext) {
        return viewActionsByActionId.values().stream()
                .map(viewActionDescriptor -> viewActionDescriptor.toWebuiRelatedProcessDescriptor(viewContext));
    }

}