JPA - @Convert Examples

package com.logicbig.example;

import javax.persistence.Convert;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import java.io.File;

@Entity
public class Report {
    @Id
    @GeneratedValue
    private long id;
    private String description;
    @Convert(converter = FileConverter.class)
    private File file;

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public File getFile() {
        return file;
    }

    public void setFile(File file) {
        this.file = file;
    }

    @Override
    public String toString() {
        return "Report{" +
                "id=" + id +
                ", description='" + description + '\'' +
                ", file=" + file +
                '}';
    }
}

package com.logicbig.example;

import javax.persistence.*;
import java.io.File;
import java.util.ArrayList;
import java.util.List;

@Entity
public class Journal {
    @Id
    @GeneratedValue
    private long id;
    @ElementCollection
    @Convert(converter = FileConverter.class, attributeName = "file")
    private List<Report> reports;

    public void addReport(String description, File file) {
        if (reports == null) {
            reports = new ArrayList<>();
        }
        Report report = new Report();
        report.setDescription(description);
        report.setFile(file);
        reports.add(report);
    }


    @Override
    public String toString() {
        return "Journal{" +
                "id=" + id +
                ", reports=" + reports +
                '}';
    }
}

package com.logicbig.example;

import javax.persistence.*;
import java.io.File;
import java.util.HashMap;
import java.util.Map;

@Entity
public class Journal {
    @Id
    @GeneratedValue
    private long id;
    @ElementCollection
    @Convert(converter = FileConverter.class, attributeName = "value")
    private Map<String, File> reportMap;

    public void addReport(String description, File file) {
        if (reportMap == null) {
            reportMap = new HashMap<>();
        }
        reportMap.put(description, file);
    }

    @Override
    public String toString() {
        return "Journal{" +
                "id=" + id +
                ", reportMap=" + reportMap +
                '}';
    }
}

package com.logicbig.example;

import javax.persistence.*;
import java.io.File;
import java.util.HashMap;
import java.util.Map;

@Entity
public class Journal {
    @Id
    @GeneratedValue
    private long id;
    @ElementCollection
    @Convert(converter = FileConverter.class, attributeName = "value.file")
    private Map<String, Report> reportMap;

    public Map<String, Report> getReportMap() {
        return reportMap;
    }

    public void addReport(String reportName, String description, File file) {
        if (reportMap == null) {
            reportMap = new HashMap<>();
        }
        Report report = new Report();
        report.setDescription(description);
        report.setFile(file);
        reportMap.put(reportName, report);
    }

    @Override
    public String toString() {
        return "Journal{" +
                "id=" + id +
                ", reportMap=" + reportMap +
                '}';
    }
}