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

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Here is the source code for jp.co.nemuzuka.dao.ProjectDao.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.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import jp.co.nemuzuka.meta.ProjectModelMeta;
import jp.co.nemuzuka.model.ProjectModel;

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;

/**
 * ProjectModel??Dao.
 * @author kazumune
 */
public class ProjectDao extends AbsDao {

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

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

    private static ProjectDao projectDao = new ProjectDao();

    /**
     * ?.
     * @return 
     */
    public static ProjectDao getInstance() {
        return projectDao;
    }

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

    /**
     * get?.
     * ????Model????
     * @param keyToString Key
     * @return ????Model??????null
     */
    public ProjectModel get(String keyToString) {
        Key key = Datastore.stringToKey(keyToString);
        ProjectModel model = get(key);
        return model;
    }

    /**
     * List?.
     * @param projectName ??(?)
     * @return 
     */
    public List<ProjectModel> getList(String projectName) {
        ProjectModelMeta e = (ProjectModelMeta) getModelMeta();
        Set<FilterCriterion> filterSet = new HashSet<FilterCriterion>();
        if (StringUtils.isNotEmpty(projectName)) {
            filterSet.add(e.projectName.startsWith(projectName));
        }
        return Datastore.query(e).filter(filterSet.toArray(new FilterCriterion[0])).sortInMemory(e.key.asc)
                .asList();
    }

    /**
     * List?.
     * @param keys key?
     * @return 
     */
    public List<ProjectModel> getList(Key... keys) {
        ProjectModelMeta e = (ProjectModelMeta) getModelMeta();
        Set<FilterCriterion> filterSet = new HashSet<FilterCriterion>();
        if (keys != null && keys.length != 0) {
            filterSet.add(e.key.in(keys));
        } else {
            return new ArrayList<ProjectModel>();
        }
        return Datastore.query(e).filter(filterSet.toArray(new FilterCriterion[0])).sortInMemory(e.key.asc)
                .asList();
    }
}