org.sonar.server.component.DefaultComponentFinder.java Source code

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Here is the source code for org.sonar.server.component.DefaultComponentFinder.java

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/*
 * SonarQube
 * Copyright (C) 2009-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.server.component;

import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.common.collect.Sets;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import javax.annotation.Nonnull;
import org.sonar.api.component.Component;
import org.sonar.api.utils.Paging;
import org.sonar.api.utils.log.Logger;
import org.sonar.api.utils.log.Loggers;

import static com.google.common.collect.Lists.newArrayList;
import static org.sonar.api.utils.Paging.forPageIndex;

/**
 * @since 3.7
 */
public class DefaultComponentFinder {

    private static final Logger LOG = Loggers.get(DefaultComponentFinder.class);

    public DefaultComponentQueryResult find(ComponentQuery query, List<Component> allComponents) {
        LOG.debug("ComponentQuery : {}", query);
        Collection<Component> foundComponents = search(query, allComponents);

        // Sort components
        Collection<? extends Component> sortedComponents = new ComponentsFinderSort(foundComponents, query).sort();

        // Apply pagination if needed
        if (ComponentQuery.NO_PAGINATION == query.pageSize()) {
            return new DefaultComponentQueryResult(sortedComponents).setQuery(query);
        } else {
            Paging paging = forPageIndex(query.pageIndex()).withPageSize(query.pageSize())
                    .andTotal(foundComponents.size());
            Collection<? extends Component> pagedComponents = pagedComponents(sortedComponents, paging);
            return new DefaultComponentQueryResult(pagedComponents).setPaging(paging).setQuery(query);
        }
    }

    private static Collection<Component> search(ComponentQuery query, List<? extends Component> allComponents) {
        return newArrayList(Iterables.filter(allComponents, new MatchQuery(query)));
    }

    interface Filter {

        String field(Component component);

        default boolean accept(Component component, Collection<String> collections) {
            if (!collections.isEmpty()) {
                for (String item : collections) {
                    if (field(component).toLowerCase().contains(item.toLowerCase())) {
                        return true;
                    }
                }
                return false;
            }
            return true;
        }
    }

    static class NameFilter implements Filter {
        @Override
        public String field(Component component) {
            return component.name();
        }
    }

    static class KeyFilter implements Filter {
        @Override
        public String field(Component component) {
            return component.key();
        }
    }

    private static Collection<? extends Component> pagedComponents(Collection<? extends Component> components,
            Paging paging) {
        Set<Component> pagedComponents = Sets.newLinkedHashSet();
        int index = 0;
        for (Component component : components) {
            if (index >= paging.offset() && pagedComponents.size() < paging.pageSize()) {
                pagedComponents.add(component);
            } else if (pagedComponents.size() >= paging.pageSize()) {
                break;
            }
            index++;
        }
        return pagedComponents;
    }

    private static class MatchQuery implements Predicate<Component> {
        private final ComponentQuery query;

        public MatchQuery(ComponentQuery query) {
            this.query = query;
        }

        @Override
        public boolean apply(@Nonnull Component component) {
            return new KeyFilter().accept(component, query.keys())
                    && new NameFilter().accept(component, query.names());
        }
    }

}