com.isotrol.impe3.palette.content.loader.ManyByFieldComponent.java Source code

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Here is the source code for com.isotrol.impe3.palette.content.loader.ManyByFieldComponent.java

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/**
 * This file is part of Port@l
 * Port@l 3.0 - Portal Engine and Management System
 * Copyright (C) 2010  Isotrol, SA.  http://www.isotrol.com
 *
 * Port@l 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.
 *
 * Port@l 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 Port@l.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.isotrol.impe3.palette.content.loader;

import java.util.Arrays;
import java.util.List;

import net.sf.derquinse.lucis.Item;

import com.google.common.base.Predicates;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.isotrol.impe3.api.component.Extract;
import com.isotrol.impe3.api.component.Inject;
import com.isotrol.impe3.api.content.Content;
import com.isotrol.impe3.api.content.ContentCriteria;
import com.isotrol.impe3.api.content.ContentListing;
import com.isotrol.impe3.api.content.Listing;
import com.isotrol.impe3.nr.api.ISO9075;
import com.isotrol.impe3.nr.api.NodeQueries;
import com.isotrol.impe3.nr.api.NodeQuery;
import com.isotrol.impe3.support.listing.ContentListingPage;

/**
 * Reads some contents using a field=value query.
 * @author Andres Rodriguez
 */
public class ManyByFieldComponent extends AbstractLoaderComponent {
    /** Loaded contents. */
    private ContentListing contents;
    /** Configuration. */
    private ManyByFieldConfig config;

    /**
     * Constructor.
     */
    public ManyByFieldComponent() {
    }

    @Inject
    public void setConfig(ManyByFieldConfig config) {
        this.config = config;
    }

    private Content loadContent(ContentCriteria criteria, String v) {
        String f = config.fieldName();
        if (config.encode()) {
            v = ISO9075.encode(v);
        }
        final NodeQuery query = NodeQueries.term(f, v);
        final ContentCriteria c = criteria.clone();
        c.must(query);
        final Item<Content> item = c.getFirst();
        if (item != null) {
            return item.getItem();
        }
        return null;
    }

    @Override
    void load(ContentCriteria criteria) {
        final List<Content> list = Lists.newArrayListWithCapacity(10);
        if (config != null) {
            for (String v : Iterables.filter(
                    Arrays.asList(config.fieldValue(), config.fieldValue2(), config.fieldValue3(),
                            config.fieldValue4(), config.fieldValue5(), config.fieldValue6(), config.fieldValue7(),
                            config.fieldValue8(), config.fieldValue9(), config.fieldValue10()),
                    Predicates.notNull())) {
                final Content c = loadContent(criteria, v);
                if (c != null) {
                    list.add(c);
                }

            }
        }
        contents = new ContentListingPage(list.size(), null, list);
    }

    /**
     * Content extractor.
     * @return Loaded content.
     */
    @Extract
    public Listing<?> getContents() {
        return this.contents;
    }

}