jp.co.nemuzuka.service.impl.CategoryServiceImpl.java Source code

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Here is the source code for jp.co.nemuzuka.service.impl.CategoryServiceImpl.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.service.impl;

import java.util.ConcurrentModificationException;
import java.util.List;

import jp.co.nemuzuka.core.entity.LabelValueBean;
import jp.co.nemuzuka.dao.CategoryDao;
import jp.co.nemuzuka.form.CategoryForm;
import jp.co.nemuzuka.model.CategoryModel;
import jp.co.nemuzuka.service.CategoryService;
import jp.co.nemuzuka.utils.ConvertUtils;
import jp.co.nemuzuka.utils.LabelValueBeanUtils;

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

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

/**
 * CategoryService?.
 * @author kazumune
 */
public class CategoryServiceImpl implements CategoryService {

    CategoryDao categoryDao = CategoryDao.getInstance();

    private static CategoryServiceImpl impl = new CategoryServiceImpl();

    /**
     * ?.
     * @return 
     */
    public static CategoryServiceImpl getInstance() {
        return impl;
    }

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

    /* (non-Javadoc)
     * @see jp.co.nemuzuka.service.CategoryService#get(java.lang.String)
     */
    @Override
    public CategoryForm get(String projectKeyString) {
        CategoryForm form = new CategoryForm();
        if (StringUtils.isNotEmpty(projectKeyString)) {
            CategoryModel model = categoryDao.get4ProjectKey(projectKeyString);
            setForm(form, model);
        }
        return form;
    }

    /* (non-Javadoc)
     * @see jp.co.nemuzuka.service.CategoryService#put(jp.co.nemuzuka.form.CategoryForm, java.lang.String)
     */
    @Override
    public void put(CategoryForm form, String projectKeyString) {
        CategoryModel model = null;
        Long version = ConvertUtils.toLong(form.versionNo);

        if (version != null) {
            //??
            //version?Key??
            Key key = Datastore.stringToKey(form.keyToString);
            model = categoryDao.get(key, version);
            if (model == null) {
                //??????Exceptionthrow
                throw new ConcurrentModificationException();
            }
        } else {
            //???
            model = new CategoryModel();
            //Key?Key?
            Key key = Datastore.createKey(CategoryModel.class, projectKeyString);
            model.setKey(key);
        }
        setModel(model, form);
        categoryDao.put(model);
    }

    /* (non-Javadoc)
     * @see jp.co.nemuzuka.service.CategoryService#getList(java.lang.String)
     */
    @Override
    public List<LabelValueBean> getList(String projectKeyString) {
        CategoryForm form = get(projectKeyString);
        return LabelValueBeanUtils.createList(form.categoryName, true);
    }

    /**
     * Form.
     * @param form Form
     * @param model Model
     */
    private void setForm(CategoryForm form, CategoryModel model) {
        if (model == null) {
            return;
        }
        form.keyToString = model.getKeyToString();
        form.categoryName = model.getCategoryName().getValue();
        form.versionNo = ConvertUtils.toString(model.getVersion());
    }

    /**
     * Model.
     * @param model Model
     * @param form Form
     */
    private void setModel(CategoryModel model, CategoryForm form) {
        model.setCategoryName(new Text(form.categoryName));
    }
}