LinkGraph.java

package org.activityinfo.ui.client.page.config.link;

/*
 * #%L
 * ActivityInfo Server
 * %%
 * Copyright (C) 2009 - 2013 UNICEF
 * %%
 * 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>.
 * #L%
 */

import com.google.common.collect.Sets;
import org.activityinfo.legacy.shared.command.result.IndicatorLink;
import org.activityinfo.legacy.shared.model.IndicatorDTO;
import org.activityinfo.legacy.shared.model.UserDatabaseDTO;

import java.util.Collections;
import java.util.List;
import java.util.ListIterator;
import java.util.Set;

public class LinkGraph {

    private List<IndicatorLink> links;

    public LinkGraph() {
        links = Collections.emptyList();
    }

    public LinkGraph(List<IndicatorLink> links) {
        this.links = links;
    }

    public Set<Integer> sourceDatabases() {
        Set<Integer> set = Sets.newHashSet();
        for (IndicatorLink link : links) {
            set.add(link.getSourceDatabaseId());
        }
        return set;
    }

    public Set<Integer> destDatabases() {
        Set<Integer> set = Sets.newHashSet();
        for (IndicatorLink link : links) {
            set.add(link.getDestinationDatabaseId());
        }
        return set;
    }

    public Set<Integer> sourcesForDatabase(UserDatabaseDTO model) {
        Set<Integer> set = Sets.newHashSet();
        for (IndicatorLink link : links) {
            if (link.getDestinationDatabaseId() == model.getId()) {
                set.add(link.getSourceDatabaseId());
            }
        }
        return set;
    }

    public Set<Integer> destinationForDatabase(UserDatabaseDTO model) {
        Set<Integer> set = Sets.newHashSet();
        for (IndicatorLink link : links) {
            if (link.getSourceDatabaseId() == model.getId()) {
                set.add(link.getDestinationDatabaseId());
            }
        }
        return set;
    }

    public Set<Integer> sourceIndicators(UserDatabaseDTO source, UserDatabaseDTO dest) {
        Set<Integer> set = Sets.newHashSet();

        if (source != null && dest != null) {

            for (IndicatorLink link : links) {
                if (link.getSourceDatabaseId() == source.getId() && link.getDestinationDatabaseId() == dest.getId()) {

                    set.add(link.getSourceIndicatorId());
                }
            }
        }
        return set;
    }

    public Set<Integer> destinationIndicators(UserDatabaseDTO source, UserDatabaseDTO dest) {
        Set<Integer> set = Sets.newHashSet();

        if (source != null && dest != null) {

            for (IndicatorLink link : links) {
                if (link.getSourceDatabaseId() == source.getId() && link.getDestinationDatabaseId() == dest.getId()) {

                    set.add(link.getDestinationIndicatorId());
                }
            }
        }
        return set;
    }

    public Set<Integer> destForIndicator(IndicatorDTO source, UserDatabaseDTO dest) {
        Set<Integer> set = Sets.newHashSet();

        if (source != null && dest != null) {

            for (IndicatorLink link : links) {
                if (link.getSourceIndicatorId() == source.getId() && link.getDestinationDatabaseId() == dest.getId()) {

                    set.add(link.getDestinationIndicatorId());
                }
            }
        }
        return set;
    }

    public Set<Integer> sourceForIndicator(UserDatabaseDTO source, IndicatorDTO dest) {
        Set<Integer> set = Sets.newHashSet();

        if (source != null && dest != null) {

            for (IndicatorLink link : links) {
                if (link.getSourceDatabaseId() == source.getId() && link.getDestinationIndicatorId() == dest.getId()) {

                    set.add(link.getSourceIndicatorId());
                }
            }
        }
        return set;
    }

    public boolean linked(IndicatorDTO source, IndicatorDTO dest) {
        for (IndicatorLink link : links) {
            if (link.getSourceIndicatorId() == source.getId() && link.getDestinationIndicatorId() == dest.getId()) {
                return true;
            }
        }
        return false;
    }

    public void link(UserDatabaseDTO sourceDb, IndicatorDTO source, UserDatabaseDTO destDb, IndicatorDTO dest) {
        IndicatorLink link = new IndicatorLink();
        link.setSourceDatabaseId(sourceDb.getId());
        link.setSourceIndicatorId(source.getId());
        link.setDestinationDatabaseId(destDb.getId());
        link.setDestinationIndicatorId(dest.getId());
        links.add(link);
    }

    public void unlink(IndicatorDTO source, IndicatorDTO dest) {
        for (ListIterator<IndicatorLink> it = links.listIterator(); it.hasNext(); ) {
            IndicatorLink link = it.next();
            if (link.getSourceIndicatorId() == source.getId() && link.getDestinationIndicatorId() == dest.getId()) {
                it.remove();
            }
        }
    }

}