com.liferay.knowledgebase.display.selector.KBArticleKBArticleSelector.java Source code

Introduction

Here is the source code for com.liferay.knowledgebase.display.selector.KBArticleKBArticleSelector.java

Source

/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library 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 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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.
 */

package com.liferay.knowledgebase.display.selector;

import com.liferay.knowledgebase.model.KBArticle;
import com.liferay.knowledgebase.service.KBArticleLocalServiceUtil;
import com.liferay.portal.kernel.exception.PortalException;
import com.liferay.portal.kernel.workflow.WorkflowConstants;

/**
 * @author Adolfo Prez
 */
public class KBArticleKBArticleSelector implements KBArticleSelector {

    @Override
    public KBArticle findByResourcePrimKey(long groupId, String preferredKBFolderUrlTitle,
            long ancestorResourcePrimKey, long resourcePrimKey) throws PortalException {

        KBArticle ancestorKBArticle = KBArticleLocalServiceUtil.fetchLatestKBArticle(ancestorResourcePrimKey,
                WorkflowConstants.STATUS_APPROVED);

        if (ancestorKBArticle == null) {
            return null;
        }

        KBArticle kbArticle = KBArticleLocalServiceUtil.fetchLatestKBArticle(resourcePrimKey,
                WorkflowConstants.STATUS_APPROVED);

        return getClosestMatchingDescendantKBArticle(groupId, ancestorKBArticle, kbArticle);
    }

    @Override
    public KBArticle findByUrlTitle(long groupId, String preferredKBFolderUrlTitle, long ancestorResourcePrimKey,
            String kbFolderUrlTitle, String urlTitle) throws PortalException {

        KBArticle ancestorKBArticle = KBArticleLocalServiceUtil.fetchLatestKBArticle(ancestorResourcePrimKey,
                WorkflowConstants.STATUS_APPROVED);

        if (ancestorKBArticle == null) {
            return null;
        }

        KBArticle kbArticle = KBArticleLocalServiceUtil.fetchLatestKBArticleByUrlTitle(groupId,
                ancestorKBArticle.getKbFolderId(), urlTitle, WorkflowConstants.STATUS_APPROVED);

        return getClosestMatchingDescendantKBArticle(groupId, ancestorKBArticle, kbArticle);
    }

    protected KBArticle findClosestMatchingKBArticle(long groupId, KBArticle ancestorKBArticle, KBArticle kbArticle)
            throws PortalException {

        KBArticle candidateKBArticle = kbArticle;

        while (candidateKBArticle != null) {
            KBArticle matchingKBArticle = KBArticleLocalServiceUtil.fetchKBArticleByUrlTitle(groupId,
                    ancestorKBArticle.getKbFolderId(), candidateKBArticle.getUrlTitle());

            if (matchingKBArticle != null) {
                return matchingKBArticle;
            }

            candidateKBArticle = candidateKBArticle.getParentKBArticle();
        }

        return ancestorKBArticle;
    }

    protected KBArticle getClosestMatchingDescendantKBArticle(long groupId, KBArticle ancestorKBArticle,
            KBArticle kbArticle) throws PortalException {

        if (kbArticle == null) {
            return ancestorKBArticle;
        }

        if (isDescendant(kbArticle, ancestorKBArticle)) {
            return kbArticle;
        }

        return findClosestMatchingKBArticle(groupId, ancestorKBArticle, kbArticle);
    }

    protected boolean isDescendant(KBArticle kbArticle, KBArticle ancestorKBArticle) throws PortalException {

        KBArticle parentKBArticle = kbArticle.getParentKBArticle();

        while ((parentKBArticle != null) && !parentKBArticle.equals(ancestorKBArticle)) {

            parentKBArticle = parentKBArticle.getParentKBArticle();
        }

        if (parentKBArticle != null) {
            return true;
        }

        return false;
    }

}