jp.co.nemuzuka.dao.UploadFileDao.java Source code

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Here is the source code for jp.co.nemuzuka.dao.UploadFileDao.java

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/*
 * Copyright 2012 Kazumune Katagiri. (http://d.hatena.ne.jp/nemuzuka)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package jp.co.nemuzuka.dao;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

import jp.co.nemuzuka.meta.UploadFileModelMeta;
import jp.co.nemuzuka.model.UploadFileModel;

import org.apache.commons.lang.StringUtils;
import org.slim3.datastore.Datastore;
import org.slim3.datastore.FilterCriterion;
import org.slim3.datastore.ModelMeta;

import com.google.appengine.api.datastore.Key;

/**
 * UploadFileModel??Dao.
 * @author kazumune
 */
public class UploadFileDao extends AbsDao {

    /* (? Javadoc)
     * @see jp.co.nemuzuka.dao.AbsDao#getModelMeta()
     */
    @SuppressWarnings("rawtypes")
    @Override
    ModelMeta getModelMeta() {
        return UploadFileModelMeta.get();
    }

    /* (? Javadoc)
     * @see jp.co.nemuzuka.dao.AbsDao#getModelClass()
     */
    @SuppressWarnings("rawtypes")
    @Override
    Class getModelClass() {
        return UploadFileModel.class;
    }

    private static UploadFileDao uploadFileDao = new UploadFileDao();

    /**
     * ?.
     * @return 
     */
    public static UploadFileDao getInstance() {
        return uploadFileDao;
    }

    /**
     * .
     */
    private UploadFileDao() {
    }

    /**
     * ?.
     * ????????
     * @param uploadFileKeyString UploadFile Key
     * @param ticketKeyToString ticket Key
     * @param projectKeyString project Key
     * @param version ?
     * @return (??????null)
     */
    public UploadFileModel get(String uploadFileKeyString, String ticketKeyToString, String projectKeyString,
            Long version) {

        Key key = Datastore.stringToKey(uploadFileKeyString);
        Key parentKey = Datastore.stringToKey(ticketKeyToString);
        Key projectKey = Datastore.stringToKey(projectKeyString);

        UploadFileModel model = get(key, version);
        if (model == null || model.getParentKey().equals(parentKey) == false
                || model.getProjectKey().equals(projectKey) == false) {
            return null;
        }
        return model;
    }

    /**
     * ?.
     * ???????
     * @param ticketKeyToString ?Key
     * @param projectKeyString Key
     * @return 
     */
    public List<UploadFileModel> getList(String ticketKeyToString, String projectKeyString) {
        UploadFileModelMeta e = (UploadFileModelMeta) getModelMeta();
        Set<FilterCriterion> filterSet = new HashSet<FilterCriterion>();
        if (StringUtils.isNotEmpty(ticketKeyToString)) {
            filterSet.add(e.parentKey.equal(Datastore.stringToKey(ticketKeyToString)));
        }
        if (StringUtils.isNotEmpty(projectKeyString)) {
            filterSet.add(e.projectKey.equal(Datastore.stringToKey(projectKeyString)));
        }
        return Datastore.query(e).filter(filterSet.toArray(new FilterCriterion[0])).sortInMemory(e.key.asc)
                .asList();
    }
}