us.repasky.microblog.domain.Post.java Source code

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Here is the source code for us.repasky.microblog.domain.Post.java

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/*
 * Copyright 2012 the original author or authors.
 *
 * 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 us.repasky.microblog.domain;

import static javax.persistence.GenerationType.AUTO;

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Transient;
import javax.validation.constraints.Size;

import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.apache.commons.lang.builder.ToStringBuilder;
import org.apache.commons.lang.builder.ToStringStyle;
import org.joda.time.DateTime;
import org.joda.time.Period;
import org.joda.time.format.PeriodFormatter;
import org.joda.time.format.PeriodFormatterBuilder;
import org.springframework.format.annotation.DateTimeFormat;

/**
 * This represents a post from a user to their followers.
 *  
 * @author Drew Repasky
 */
@Entity
public class Post {

    private static final int MAX_MESSAGE_SIZE = 500;

    private static final PeriodFormatter PERIOD_FORMATTER = new PeriodFormatterBuilder().appendDays()
            .appendSuffix("d").appendSeparator(" ").appendHours().appendSuffix("h").appendSeparator(" ")
            .printZeroAlways().appendMinutes().appendSuffix("m").toFormatter();

    @Id
    @GeneratedValue(strategy = AUTO)
    private Long id;

    @ManyToOne
    @JoinColumn(name = "username")
    private BlogUser blogUser;

    @Size(min = 1, max = MAX_MESSAGE_SIZE, message = "Post {javax.validation.constraints.Size.message}")
    @Column(nullable = false, length = MAX_MESSAGE_SIZE)
    private String message;

    @Column(nullable = false)
    private Date createdDate;

    @Transient
    private Date retrievalDate = new Date();

    protected static String getAge(final Date fromDate, final Date createdDate) {
        DateTime now = new DateTime(fromDate);
        DateTime created = new DateTime(createdDate);

        Period period = new Period(created, now);
        String age = "";

        int weeksAgo = period.getWeeks();
        if (weeksAgo == 0) {
            age = PERIOD_FORMATTER.print(period.normalizedStandard());
        } else {
            age = "a long while ago";
        }

        return age;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public BlogUser getBlogUser() {
        return blogUser;
    }

    public void setBlogUser(BlogUser blogUser) {
        this.blogUser = blogUser;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    @DateTimeFormat(style = "MM")
    public Date getCreatedDate() {
        return createdDate;
    }

    public void setCreatedDate(Date createdDate) {
        this.createdDate = createdDate;
    }

    /**
     * How long ago was this post made? This is calculated based on the post's
     * created date, and is not saved to the database.
     */
    @Transient
    public String getAge() {
        return Post.getAge(new Date(), this.createdDate);
    }

    @Transient
    public Date getRetrievalDate() {
        return retrievalDate;
    }

    @Override
    public int hashCode() {
        return HashCodeBuilder.reflectionHashCode(this);
    }

    @Override
    public boolean equals(Object obj) {
        return EqualsBuilder.reflectionEquals(this, obj);
    }

    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this, ToStringStyle.MULTI_LINE_STYLE);
    }
}