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

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Here is the source code for jp.co.nemuzuka.service.impl.CommentServiceImpl.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.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.ConcurrentModificationException;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.lang.StringUtils;

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

import jp.co.nemuzuka.dao.CommentDao;
import jp.co.nemuzuka.dao.MemberDao;
import jp.co.nemuzuka.entity.CommentModelEx;
import jp.co.nemuzuka.model.CommentModel;
import jp.co.nemuzuka.model.MemberModel;
import jp.co.nemuzuka.service.CommentService;
import jp.co.nemuzuka.service.MemberService;
import jp.co.nemuzuka.utils.ConvertUtils;
import jp.co.nemuzuka.utils.DateTimeUtils;

/**
 * CommentService?.
 * @author k-katagiri
 */
public class CommentServiceImpl implements CommentService {

    CommentDao commentDao = CommentDao.getInstance();
    MemberDao memberDao = MemberDao.getInstance();
    MemberService memberService = MemberServiceImpl.getInstance();

    private static CommentServiceImpl impl = new CommentServiceImpl();

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

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

    /* (non-Javadoc)
     * @see jp.co.nemuzuka.service.CommentService#getList(com.google.appengine.api.datastore.Key)
     */
    @Override
    public List<CommentModelEx> getList(Key refsKey) {

        List<CommentModel> list = commentDao.getList(refsKey);
        Set<Key> memberKey = new LinkedHashSet<Key>();
        for (CommentModel target : list) {
            memberKey.add(target.getCreateMemberKey());
        }

        //??
        Map<Key, MemberModel> memberMap = memberDao.getMap(memberKey.toArray(new Key[0]));

        //List?
        SimpleDateFormat sdf = DateTimeUtils.createSdf("MM/dd HH:mm");
        List<CommentModelEx> retList = new ArrayList<CommentModelEx>();
        for (CommentModel target : list) {
            CommentModelEx entity = new CommentModelEx();
            entity.setModel(target);

            String createMemberName = null;
            MemberModel memberModel = memberMap.get(target.getCreateMemberKey());
            if (memberModel != null) {
                createMemberName = memberModel.getName();
            } else {
                createMemberName = "";
            }
            entity.setCreateMemberName(createMemberName);

            entity.setCreatedAt(ConvertUtils.toString(target.getCreatedAt(), sdf));

            retList.add(entity);
        }
        return retList;
    }

    /* (non-Javadoc)
     * @see jp.co.nemuzuka.service.CommentService#put(com.google.appengine.api.datastore.Key, java.lang.String, java.lang.String)
     */
    @Override
    public void put(Key refsKey, String comment, String email) {

        CommentModel model = new CommentModel();
        model.setComment(new Text(StringUtils.defaultString(comment)));
        Key memberKey = memberService.getKey(email);
        if (memberKey == null) {
            return;
        }
        model.setCreateMemberKey(memberKey);
        model.setRefsKey(refsKey);
        commentDao.put(model);
    }

    /* (non-Javadoc)
     * @see jp.co.nemuzuka.service.CommentService#delete(com.google.appengine.api.datastore.Key, java.lang.String, java.lang.Long)
     */
    @Override
    public void delete(Key refsKey, String commentKeyString, Long commentVersionNo) {
        CommentModel model = commentDao.get(commentKeyString, commentVersionNo, refsKey);
        if (model == null) {
            //??????Exceptionthrow
            throw new ConcurrentModificationException();
        }
        commentDao.delete(model.getKey());
    }

}