I have the following xml and i want to parse it with simpleXML.
<programme start="20161107190000 GMT+04:00" stop="20161107200000 GMT+04:00" channel="001">
<title lang="en_GB">Foo</title>
<desc lang="en_GB">Foobarbaz</desc>
</programme>
<programme start="20161107200000 GMT+04:00" stop="20161107203000 GMT+04:00" channel="001">
<title lang="en_GB">JLS</title>
<desc lang="en_GB">The Java Language Specification</desc>
</programme>
having the following
#Root
public class Programme {
#Attribute(name = "channel", required = false)
private String channel;
#Attribute(name = "start", required = false)
private String start;
#Attribute(name = "stop", required = false)
private String stop;
#Element(name = "title", required = false)
private Title title;
#Element(name = "desc", required = false)
private String desc;
public Programme(String channel, String start, String stop, String title, String desc) {
this.channel = channel;
this.start = start;
this.stop = stop;
this.title = title;
this.desc = desc;
}
public String getChannel() {
return channel;
}
public void setChannel(String channel) {
this.channel = channel;
}
public String getStart() {
return start;
}
public void setStart(String start) {
this.start = start;
}
public String getStop() {
return stop;
}
public void setStop(String stop) {
this.stop = stop;
}
public Title getTitle() {
return title;
}
public void setTitle(Title title) {
this.title = title;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
#Root(name = "title")
public class Title {
#Attribute
private String lang;
private String text;
public Title(String lang, String text) {
this.lang = lang;
this.text = text;
}
public String getLang() {
return lang;
}
public void setLang(String lang) {
this.lang = lang;
}
#Text
public String getText() {
return text;
}
#Text
public void setText(String text) {
this.text = text;
}
}
}
gives me the error org.simpleframework.xml.core.ConstructorException: Can not construct inner class.
There are couple of things to be careful about.
1) if you have nested class for Attributes in inner Elements the nested class must be static.
2) defining variable for inner class must annotate as follows
#Element(name = "title", type = Title.class, required = false)
private Title title;
3) inside constructor they should instantiate an empty class
this.title = new Title();
This is a full working version:
#Root
public class Programme {
#Attribute(name = "channel", required = false)
private final String channel;
#Attribute(name = "start", required = false)
private final String start;
#Attribute(name = "stop", required = false)
private final String stop;
#Element(name = "title", type = Title.class, required = false)
private Title title;
#Element(name = "desc", type = Desc.class, required = false)
private Desc desc;
public Programme(
#Attribute(name = "channel") String channel,
#Attribute(name = "start") String start,
#Attribute(name = "stop") String stop
) {
this.channel = channel;
this.start = start;
this.stop = stop;
this.title = new Title();
this.desc = new Desc();
}
public Title getTitle() {
return title;
}
public void setTitle(Title title) {
this.title = title;
}
public Desc getDesc() {
return desc;
}
public void setDesc(Desc desc) {
this.desc = desc;
}
#Root(name = "title")
public static class Title {
public String text;
#Attribute(name = "lang")
private String lang;
#Text
public String getText() {
return text;
}
#Text
public void setText(String text) {
this.text = text;
}
public String getLang() {
return lang;
}
}
#Root(name = "desc")
public static class Desc {
public String text;
#Attribute(name = "lang")
private String lang;
#Text
public String getText() {
return text;
}
#Text
public void setText(String text) {
this.text = text;
}
public String getLang() {
return lang;
}
}
}
Related
I am developing a news app and implemented but I am not able to convert model class to typeconverter below my model class
#Entity
#ForeignKey(entity = Source.class,parentColumns = "source", childColumns = "content")
public class Article {
#PrimaryKey
#SerializedName("source")
#Expose
#ColumnInfo(name ="source")
#TypeConverters(SourceTypeConverter.class)
private Source source;
public Source getSource() {
return source;
}
public void setSource(Source source) {
this.source = source;
}
#SerializedName("author")
#Expose
#ColumnInfo(name = "author")
private String author;
#SerializedName("title")
#Expose
#ColumnInfo(name = "title")
private String title;
#SerializedName("description")
#Expose
#ColumnInfo(name = "description")
private String description;
#SerializedName("url")
#Expose
#ColumnInfo(name = "url")
private String url;
#SerializedName("urlToImage")
#Expose
#ColumnInfo(name = "urlToImage")
private String urlToImage;
#SerializedName("publishedAt")
#Expose
#ColumnInfo(name = "publishedAt")
private String publishedAt;
#SerializedName("content")
#Expose
#ColumnInfo(name = "content")
private String content;
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getUrlToImage() {
return urlToImage;
}
public void setUrlToImage(String urlToImage) {
this.urlToImage = urlToImage;
}
public String getPublishedAt() {
return publishedAt;
}
public void setPublishedAt(String publishedAt) {
this.publishedAt = publishedAt;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
}
below my SourceTypeConverter class
public class SourceTypeConverter {
#TypeConverter
public static Source ConvertSource(Source source){
return source == null ? null : new Source(source);
}
}
below Source.java
public class Source {
#SerializedName("id")
#Expose
private String id;
#SerializedName("name")
#Expose
private String name;
public Source(Source source) {
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
below I am getting C:\Users\Edgar\Desktop\Sport News\app\src\main\java\edgar\yodgorbek\sportnews\model\Article.java:18: error: Cannot figure out how to save this field into database. You can consider adding a type converter for it.
private Source source;
below my database class
#Database(entities = {Article.class}, version = 1, exportSchema = false)
public abstract class SportNewsDatabase extends RoomDatabase {
public abstract SportNewsDao sportNewsDao();
}
According to our chat in linkedin I could say that you are very ungrateful man. Your problem that room can't convert file type Source that you have in model. So you need to create converter from Source class to type that sqlite supported.
According to your latest published code I could say that you try to do something wrong. You have two tables: Source and Article. And you want to store link to Source inside Article.
Delete your type converter
Read this http://androidkt.com/database-relationships/
In short you need to create foreign key for Source in Article. This is one-to-one relation.
I need to map two pojo class using one to many, but getting the below error
com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column 'testCaseStepsform' at row 1
When I saw the table created by hibernate, I found that a column with data type blob is created
I am adding the code below.
#Entity
#Table(name="TEST_CASE_DESC")
public class TestCaseForm implements Serializable{
/**
*
*/
private static final long serialVersionUID = 10001234L;
#Id
#Column(name="TEST_CASE_ID")
private String testCaseId;
#Column(name="PROJECT_NAME")
private String projectName;
#Column(name="PROJECT_ID")
private String projectId;
#Column(name="RELEASE_NAME")
private String releaseName;
#Column(name="RELEASE_ID")
private String releaseId;
#Column(name="ITERATION")
private String iteration;
#Column(name="TITLE")
private String title;
#Column(name="CREATED_BY")
private String createdBy;
#Column(name="CREATION_DATE")
private Date creationDate;
#Column(name="DESCRIPTION")
private String description;
#Column(name="PRE_CONDITION")
private String preCondition;
#Column(name="POST_CONDITION")
private String postCondition;
#Column(name="TYPE")
private String type;
#Column(name="IMPORTANCE")
private String importance;
private ArrayList<TestCaseStepsForm> testCaseStepsform = new ArrayList<TestCaseStepsForm>();
public String getProjectId() {
return projectId;
}
public void setProjectId(String projectId) {
this.projectId = projectId;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getCreatedBy() {
return createdBy;
}
public void setCreatedBy(String createdBy) {
this.createdBy = createdBy;
}
public Date getCreationDate() {
return creationDate;
}
public void setCreationDate(Date creationDate) {
this.creationDate = creationDate;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getPreCondition() {
return preCondition;
}
public void setPreCondition(String preCondition) {
this.preCondition = preCondition;
}
public String getPostCondition() {
return postCondition;
}
public void setPostCondition(String postCondition) {
this.postCondition = postCondition;
}
public String getProjectName() {
return projectName;
}
public void setProjectName(String projectName) {
this.projectName = projectName;
}
public String getRelease() {
return releaseName;
}
public void setReleaseName(String releaseName) {
this.releaseName = releaseName;
}
public String getReleaseId() {
return releaseId;
}
public void setReleaseId(String releaseId) {
this.releaseId = releaseId;
}
public String getIteration() {
return iteration;
}
public void setIteration(String iteration) {
this.iteration = iteration;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getReleaseName() {
return releaseName;
}
public String getImportance() {
return importance;
}
public void setImportance(String importance) {
this.importance = importance;
}
#OneToMany(mappedBy = "TEST_CASE_DESC", cascade = CascadeType.ALL)
public ArrayList<TestCaseStepsForm> getTestCaseStepsform() {
return testCaseStepsform;
}
public void setTestCaseStepsform(ArrayList<TestCaseStepsForm> testCaseStepsform) {
this.testCaseStepsform = testCaseStepsform;
}
public String getTestCaseId() {
return testCaseId;
}
public void setTestCaseId(String testCaseId) {
this.testCaseId = testCaseId;
}
}
#Entity
#Table(name="TEST_CASE_STEP")
public class TestCaseStepsForm implements Serializable{
/**
*
*/
private static final long serialVersionUID = 123456788091L;
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
#Column(name="SERIAL_NUMBER")
private String serialNumber;
#Column(name="TEST_CASE_ID")
private String testCaseId;
#Column(name="INPUT")
private String input;
#Column(name="EXPCETED_OUTPUT")
private String expectedOutput;
#Column(name="STATUS")
private String status;
private TestCaseForm testCaseForm;
public String getTestCaseId() {
return testCaseId;
}
public void setTestCaseId(String testCaseId) {
this.testCaseId = testCaseId;
}
public String getInput() {
return input;
}
public void setInput(String input) {
this.input = input;
}
public String getExpectedOutput() {
return expectedOutput;
}
public void setExpectedOutput(String expectedOutput) {
this.expectedOutput = expectedOutput;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
#ManyToOne( fetch = FetchType.LAZY)
#JoinColumn(name = "TEST_CASE_ID", nullable = false)
public TestCaseForm getTestCaseForm() {
return testCaseForm;
}
public void setTestCaseForm(TestCaseForm testCaseForm) {
this.testCaseForm = testCaseForm;
}
public String getSerialNumber() {
return serialNumber;
}
public void setSerialNumber(String serialNumber) {
this.serialNumber = serialNumber;
}
}
#Configuration
public class TestCaseConfig {
#Bean(name="testCaseForm1")
public TestCaseForm testCaseForm1(){
TestCaseForm tst = new TestCaseForm();
tst.setTestCaseId("1122233");
tst.setProjectId("1234");
tst.setReleaseName("June");
tst.setReleaseId("1707");
tst.setIteration("2");
tst.setProjectName("ExpressPay");
tst.setTitle("ExpressPay");
tst.setCreatedBy("Anirban Deb");
tst.setCreationDate(new Date());
tst.setDescription("ExpressPay Login");
tst.setPreCondition("Active account");
tst.setPostCondition("success");
TestCaseStepsForm str1 = new TestCaseStepsForm();
str1.setTestCaseId("1122233");
str1.setInput("Hello World");
str1.setExpectedOutput("Bye Bye world");
str1.setStatus("Run");
str1.setTestCaseForm(tst);
TestCaseStepsForm str2 = new TestCaseStepsForm();
str2.setTestCaseId("1122233");
str2.setInput("Hello World");
str2.setExpectedOutput("Bye Bye world");
str2.setStatus("Run");
str1.setTestCaseForm(tst);
tst.getTestCaseStepsform().add(str1);
tst.getTestCaseStepsform().add(str2);
return tst;
}
}
public class Main {
public static void main(String[] args) throws MessagingException {
StopWatch stopWatch = new StopWatch();
stopWatch.start();
ConfigurableApplicationContext context = new ClassPathXmlApplicationContext("core-bean.xml");
TestCaseForm test1 = context.getBean("testCaseForm1",TestCaseForm.class);
ITestCaseService testCase = context.getBean("testCaseServiceImp", ITestCaseService.class);
testCase.inserTestCase(test1);
[enter image description here][1]
stopWatch.stop();
System.out.println("Time taken in execution : "+stopWatch.getTotalTimeSeconds());
}
}
You should choose to annotate object properties or getters. Don't use it simultaneously.
Apart, #xl0e answer
You need to correct mapping
#OneToMany(mappedBy = "testCaseForm", cascade = CascadeType.ALL)
public ArrayList<TestCaseStepsForm> getTestCaseStepsform() {
return testCaseStepsform;
}
How to parse the media:thumbnail url value from an RSSItem using simpleXml?
Here is my RSSItem class:
#Root(name = "item", strict = false)
public class FeedItem {
#Element(name = "pubDate")
private String pubDate;
#Element(name = "title")
private String title;
#Element(name = "link")
private String link;
#Element(name = "description")
private String description;
public FeedItem() {
}
public FeedItem(String description, String link, String title, String pubDate) {
this.description = description;
this.link = link;
this.title = title;
this.pubDate = pubDate;
}
public String getPubDate() {
return pubDate;
}
public void setPubDate(String pubDate) {
this.pubDate = pubDate;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
it all works ok, but I need to parse also the image url from the xml (media:thumbnail) here:
<media:thumbnail url="https://tctechcrunch2011.files.wordpress.com/2016/12/gettyimages-591407481.jpg" />
You need to use #Attribute annotation to get this.
In <media:thumbnail ...>, the media is a namespace and you only need to use thumbnail to access the content.
Example:
#Element(name = "thumbnail", required = false)
private Thumbnail thumbnail;
#Root(name = "thumbnail", strict = false)
static class Thumbnail {
#Attribute(name = "url")
private String url;
}
this is the first time I'm working with Hibernate and I want to make this simple query in Hibernate: sql query
I've tried every thing but every time I get the same error output:
org.hibernate.QueryException: could not resolve property: MetadataForHibernate of: bookshare.entity.hasbooks.HasBooks [SELECT H.MetadataForHibernate FROM
Function I made:
#SuppressWarnings("unchecked")
public List<MetadataForHibernate> getBooksByTitle(int userID, String Title) {
Configuration cfg = new Configuration();
cfg.configure("hibernate.cfg.xml");
SessionFactory factory = cfg.buildSessionFactory();
Session session = factory.openSession();
Transaction tx = session.beginTransaction();
Query query = session.createQuery(
"SELECT H.MetadataForHibernate FROM HasBooks as H WHERE H.users.id = :userid AND LOWER(H.MetadataForHibernate.title) LIKE LOWER(:title) ORDER BY B.title ASC ");
query.setParameter("userid", userID);
query.setParameter("title", "%" + Title + "%");
List<MetadataForHibernate> books = (List<MetadataForHibernate>) query.list();
tx.rollback();
session.close();
factory.close();
return books;
}
MetadataForHibernate:
#Entity
#Table(name="tblbooks")
public class MetadataForHibernate {
#Id
#Column(name = "bookshareId")
private int bookshareId;
#Column(name="author")
private String author;
#Column(name = "availableToDownload")
private int availableToDownload;
#Column(name = "briefSynopsis")
private String briefSynopsis;
#Column(name="category")
private String category;
#Column(name = "completeSynopsis")
private String completeSynopsis;
#Column(name = "contentId")
private int contentId;
#Column(name = "copyright")
private Date copyright;
#Column(name="downloadFormat")
private String downloadFormat;
#Column(name="dtbookSize")
private int dtbookSize;
#Column(name = "freelyAvailable")
private int freelyAvailable;
#Column(name = "brf")
private int brf;
#Column(name = "daisy")
private int daisy;
#Column(name = "images")
private int images;
#Column(name = "isbn13")
private String isbn13;
#Column(name="language")
private String language;
#Column(name = "publishDate")
private Date publishDate;
#Column(name = "publisher")
private String publisher;
#Column(name = "quality")
private String quality;
#Column(name = "title")
private String title;
#OneToMany(mappedBy="book")
private List<HasBooks> hasBooks;
public MetadataForHibernate(){
hasBooks = new ArrayList<HasBooks>();
}
//Getters & Setters
public List<HasBooks> getHasBooks() {
return hasBooks;
}
public void setHasBooks(List<HasBooks> hasBooks) {
this.hasBooks = hasBooks;
}
public int getFreelyAvailable ()
{
return freelyAvailable;
}
public void setFreelyAvailable (String freelyAvailable)
{
this.freelyAvailable = Integer.parseInt(freelyAvailable);
}
public String getCompleteSynopsis ()
{
return completeSynopsis;
}
public void setCompleteSynopsis (String completeSynopsis)
{
this.completeSynopsis = completeSynopsis;
}
public int getDaisy ()
{
return daisy;
}
public void setDaisy (String daisy)
{
this.daisy = Integer.parseInt(daisy);
}
public Date getCopyright ()
{
return copyright;
}
public void setCopyright (Date copyright)
{
this.copyright = copyright;
}
public int getAvailableToDownload ()
{
return availableToDownload;
}
public void setAvailableToDownload (String availableToDownload)
{
this.availableToDownload = Integer.parseInt(availableToDownload);
}
public int getContentId ()
{
return contentId;
}
public void setContentId (String contentId)
{
this.contentId = Integer.parseInt(contentId);
}
public String getPublisher ()
{
return publisher;
}
public void setPublisher (String publisher)
{
this.publisher = publisher;
}
public int getBookshareId ()
{
return bookshareId;
}
public void setBookshareId (String bookshareId)
{
this.bookshareId = Integer.parseInt(bookshareId);
}
public String getAuthor ()
{
return author;
}
public void setAuthor (String author)
{
this.author = author;
}
public String getTitle ()
{
return title;
}
public void setTitle (String title)
{
this.title = title;
}
public String getCategory ()
{
return category;
}
public void setCategory (String category)
{
this.category = category;
}
public String getQuality ()
{
return quality;
}
public void setQuality (String quality)
{
this.quality = quality;
}
public String getIsbn13 ()
{
return isbn13;
}
public void setIsbn13 (String isbn13)
{
this.isbn13 = isbn13;
}
public int getImages ()
{
return images;
}
public void setImages (String images)
{
this.images = Integer.parseInt(images);
}
public String getLanguage ()
{
return language;
}
public void setLanguage (String language)
{
this.language = language;
}
public String getBriefSynopsis ()
{
return briefSynopsis;
}
public void setBriefSynopsis (String briefSynopsis)
{
this.briefSynopsis = briefSynopsis;
}
public int getDtbookSize ()
{
return dtbookSize;
}
public void setDtbookSize (int dtbookSize)
{
this.dtbookSize = dtbookSize;
}
public int getBrf ()
{
return brf;
}
public void setBrf (String brf)
{
this.brf = Integer.parseInt(brf);
}
public Date getPublishDate ()
{
return publishDate;
}
public void setPublishDate (Date publishDate)
{
this.publishDate = publishDate;
}
public String getDownloadFormat ()
{
return downloadFormat;
}
public void setDownloadFormat (String downloadFormat)
{
this.downloadFormat = downloadFormat;
}
#Override
public String toString()
{
return "ClassPojo [freelyAvailable = "+freelyAvailable+", completeSynopsis = "+completeSynopsis+", daisy = "+daisy+", copyright = "+copyright+", availableToDownload = "+availableToDownload+", contentId = "+contentId+", publisher = "+publisher+", bookshareId = "+bookshareId+", author = "+author+", title = "+title+", category = "+category+", quality = "+quality+", isbn13 = "+isbn13+", images = "+images+", language = "+language+", briefSynopsis = "+briefSynopsis+", dtbookSize = "+dtbookSize+", brf = "+brf+", publishDate = "+publishDate+", downloadFormat = "+downloadFormat+"]";
}
public void convertDataOf(BookDetail book) throws ParseException{
DateFormat format;
Date date;
this.bookshareId=book.getBookshare().getBook().getMetadata().getBookshareId();
this.author=String.join(",", book.getBookshare().getBook().getMetadata().getAuthor());
this.availableToDownload=book.getBookshare().getBook().getMetadata().getAvailableToDownload();
this.briefSynopsis=book.getBookshare().getBook().getMetadata().getBriefSynopsis();
this.category=String.join(",", book.getBookshare().getBook().getMetadata().getCategory());
this.completeSynopsis=book.getBookshare().getBook().getMetadata().getCompleteSynopsis();
this.contentId=book.getBookshare().getBook().getMetadata().getContentId();
//convert String to date
format = new SimpleDateFormat("yyyy");
date = format.parse(book.getBookshare().getBook().getMetadata().getCopyright());
this.copyright=date;
this.downloadFormat=String.join(",", book.getBookshare().getBook().getMetadata().getDownloadFormat());
this.dtbookSize=book.getBookshare().getBook().getMetadata().getDtbookSize();
this.freelyAvailable=book.getBookshare().getBook().getMetadata().getFreelyAvailable();
this.brf=book.getBookshare().getBook().getMetadata().getBrf();
this.daisy=book.getBookshare().getBook().getMetadata().getDaisy();
this.images=book.getBookshare().getBook().getMetadata().getImages();
this.isbn13=book.getBookshare().getBook().getMetadata().getIsbn13();
this.language=String.join(",", book.getBookshare().getBook().getMetadata().getLanguage());
//convert String to date
format = new SimpleDateFormat("MMddyyyy");
date = format.parse(book.getBookshare().getBook().getMetadata().getPublishDate());
this.publishDate=date;
this.publisher=book.getBookshare().getBook().getMetadata().getPublisher();
this.quality=book.getBookshare().getBook().getMetadata().getQuality();
this.title=book.getBookshare().getBook().getMetadata().getTitle();
}
}
HasBooks:
#Entity
#Table(name = "tblhasbooks")
public class HasBooks implements Serializable {
//#Column(name = "Id",unique = true,nullable = false)
#Id
#GeneratedValue()
private int hasBooksId;
#ManyToOne(cascade = CascadeType.ALL)
private Users user;
#ManyToOne(cascade = CascadeType.ALL)
private MetadataForHibernate book;
public MetadataForHibernate getBook() {
return book;
}
public Users getUser() {
return user;
}
public int getHasBooksId() {
return hasBooksId;
}
public void setHasBooksId(int hasBooksId) {
this.hasBooksId = hasBooksId;
}
public void setUser(Users user) {
this.user = user;
}
public void setBook(MetadataForHibernate book) {
this.book = book;
}
}
Users:
#Entity
#Table(name="tblusers")
public class Users implements Serializable{
public Users(){hasBooks = new ArrayList<HasBooks>();
}
#Id
#Column(name = "Id",unique = true,nullable = false)
#GeneratedValue(strategy=GenerationType.AUTO)
private int Id;
#Column(name = "email")
private String email;
#Column(name = "password")
private String password;
#OneToMany(mappedBy="user")
private List<HasBooks> hasBooks;
//Getters & Setters
public List<HasBooks> getHasBooks() {
return hasBooks;
}
public void setHasBooks(List<HasBooks> hasBooks) {
this.hasBooks = hasBooks;
}
public int getId() {
return Id;
}
public void setUser_id(int Id) {
this.Id = Id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
You need to specify a property name, not a property type.
SELECT H.MetadataForHibernate FROM HasBooks as H
need to be corrected to
SELECT H.book FROM HasBooks H
And you need a join to check a book properties
SELECT book
FROM HasBooks H inner join H.book book
where book.title :=title
The query you have written is not valid Hibernate Query Language (HQL), check the documentation for hints, or you can always use a native query to get an Object[] list from the result set, keeping the query you already have.
I have a problem with a criteria count query with a MapJoin !
In fact it doesn't work !
Here is my code :
public long countItems(final String title, final String url) {
CriteriaBuilder builder = entityManager.getCriteriaBuilder();
CriteriaQuery<CmsItem> query = builder.createQuery(entityClass);
Root<CmsItem> page = query.from(entityClass);
query.select(page);
MapJoin<Map<Lang, CmsItemLang>, Lang, CmsItemLang> mapJoin = page
.joinMap("cmsItemLang");
List<Predicate> predicateList = new ArrayList<Predicate>();
Predicate titlePredicate, urlPredicate;
if ((title != null) && (!(title.isEmpty()))) {
titlePredicate = builder.like(
builder.upper(mapJoin.value().<String> get("metaTitle")),
"%" + title.toUpperCase() + "%");
predicateList.add(titlePredicate);
}
if ((url != null) && (!(url.isEmpty()))) {
urlPredicate = builder.like(
builder.upper(mapJoin.value().<String> get("linkRewrite")),
"%" + url.toUpperCase() + "%");
predicateList.add(urlPredicate);
}
Predicate[] predicates = new Predicate[predicateList.size()];
predicateList.toArray(predicates);
query.where(predicates).distinct(true);
CriteriaQuery<Long> cq = builder.createQuery(Long.class);
cq.select(builder.count(cq.from(entityClass)));
entityManager.createQuery(cq);
cq.where(predicates);
Long count = entityManager.createQuery(cq).getSingleResult();
return count;
}
and I have this error when I call the method url param or title param is not null :
org.hibernate.QueryException: could not resolve property: linkRewrite of: com.demkocompany.models.CmsItem [select count(*) from com.demkocompany.models.CmsItem as generatedAlias0 where upper(generatedAlias0.linkRewrite) like :param0]
Here is my entities :
public class CmsItem {
#Id
#Column(name = "id", unique = true, nullable = false)
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
#OneToMany(cascade = { CascadeType.PERSIST, CascadeType.MERGE,
CascadeType.REMOVE }, fetch = FetchType.EAGER, mappedBy = "cmsItemLangPK.item")
#MapKey(name = "cmsItemLangPK.lang")
private Map<Lang, CmsItemLang> cmsItemLang;
public CmsItem() {
}
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
public Map<Lang, CmsItemLang> getCmsItemLang() {
return cmsItemLang;
}
public void setCmsItemLang(Map<Lang, CmsItemLang> cmsItemLang) {
this.cmsItemLang = cmsItemLang;
}
}
and the second entity (for the Map)
public class CmsItemLang implements Serializable {
private static final long serialVersionUID = 6832580916240288447L;
#EmbeddedId
private CmsItemLangPK cmsItemLangPK;
#Column(name = "title")
private String title;
#Column(name = "description")
private String description;
#Lob
#Column(name = "text")
private String text;
#Column(name = "linkRewrite")
private String linkRewrite;
#Column(name = "meta_title", length = 128)
private String metaTitle;
#Column(name = "meta_keywords", length = 255)
private String metaKeywords;
#Column(name = "meta_description", length = 255)
private String metaDescription;
public CmsItemLang() {
}
public CmsItemLangPK getCmsItemLangPK() {
return cmsItemLangPK;
}
public void setCmsItemLangPK(CmsItemLangPK cmsItemLangPK) {
this.cmsItemLangPK = cmsItemLangPK;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public String getLinkRewrite() {
return linkRewrite;
}
public void setLinkRewrite(String linkRewrite) {
this.linkRewrite = linkRewrite;
}
public String getMetaTitle() {
return metaTitle;
}
public void setMetaTitle(String meta_title) {
this.metaTitle = meta_title;
}
public String getMetaKeywords() {
return metaKeywords;
}
public void setMetaKeywords(String meta_keywords) {
this.metaKeywords = meta_keywords;
}
public String getMetaDescription() {
return metaDescription;
}
public void setMetaDescription(String meta_description) {
this.metaDescription = meta_description;
}
}
I don't understand why I have this error when I try to do that ...
Because without the count (in an other method to find the items) it works well ...
But to count all the result of the search ...the request is false ...
Is someone can help me to correct this ?
Thanks a lot
That error is likely due to the class com.demkocompany.models.CmsItem does not have linkRewrite property. Double check you do have it and the accessibility has to be public (I think)
public String getLinkRewrite() {
// ...
}
public void setLinkRewrite(String linkRewrite) {
// ...
}