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shaimaa-hshalabyzhendrikse
shaimaa-hshalaby
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zhendrikse
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From JDO to XML and Back Again 2/3 (eugenp#2681)
* From JDO to XML and Back Again 2/3 * remove comments * remove myapp class * divided into methods * remove main methods * remove classes
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‎libraries/src/main/java/com/baeldung/jdo/xml/AnnotadedPerson.java‎

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package com.baeldung.jdo.xml;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import javax.jdo.annotations.Element;
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import javax.jdo.annotations.PersistenceCapable;
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import javax.jdo.annotations.PrimaryKey;
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import javax.xml.bind.annotation.XmlAttribute;
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import javax.xml.bind.annotation.XmlElement;
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import javax.xml.bind.annotation.XmlElementWrapper;
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@PersistenceCapable(
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schema="/myproduct/people",
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table="person"
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)
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public class AnnotadedPerson {
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@XmlAttribute
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private long personNum;
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@PrimaryKey
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private String firstName;
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private String lastName;
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@XmlElementWrapper(name="phone-numbers")
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@XmlElement(name="phone-number")
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@Element(types=String.class)
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private List phoneNumbers = new ArrayList();
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public AnnotadedPerson(long personNum, String firstName, String lastName) {
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super();
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this.personNum = personNum;
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this.firstName = firstName;
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this.lastName = lastName;
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}
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public long getPersonNum() {
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return personNum;
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}
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public void setPersonNum(long personNum) {
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this.personNum = personNum;
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}
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public String getFirstName() {
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return firstName;
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}
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public void setFirstName(String firstName) {
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this.firstName = firstName;
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}
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public String getLastName() {
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return lastName;
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}
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public void setLastName(String lastName) {
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this.lastName = lastName;
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}
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public List getPhoneNumbers() {
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return phoneNumbers;
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}
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public void setPhoneNumbers(List phoneNumbers) {
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this.phoneNumbers = phoneNumbers;
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}
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}

‎libraries/src/main/java/com/baeldung/jdo/xml/MyApp.java‎

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package com.baeldung.jdo.xml;
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import java.util.List;
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import javax.jdo.JDOHelper;
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import javax.jdo.PersistenceManager;
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import javax.jdo.PersistenceManagerFactory;
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import javax.jdo.Query;
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import javax.jdo.Transaction;
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import org.datanucleus.api.jdo.JDOPersistenceManagerFactory;
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import org.datanucleus.metadata.PersistenceUnitMetaData;
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public class MyApp {
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private static PersistenceUnitMetaData pumd;
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private static PersistenceManagerFactory pmf;
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private static PersistenceManager pm;
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public static void main( String[] args ) {
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//persist product object using dynamic persistence unit
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defineDynamicPersistentUnit();
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Product product = new Product("id1","Sony Discman", "A standard discman from Sony", 49.99);
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persistObject(product);
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closePersistenceManager();
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//persist AnnotatedPerson object using named pmf
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defineNamedPersistenceManagerFactory("XmlDatastore");
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AnnotadedPerson annotatedPerson = new AnnotadedPerson(654320,"annotated","person");
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annotatedPerson.getPhoneNumbers().add("999999999");
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annotatedPerson.getPhoneNumbers().add("000000000");
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persistObject(annotatedPerson);
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queryAnnotatedPersonsInXML();
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closePersistenceManager();
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//persist Person object using PMF created by properties file
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definePersistenceManagerFactoryUsingPropertiesFile("META-INF\\datanucleus.properties");
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Person person = new Person(654321,"bealdung","author");
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person.getPhoneNumbers().add("123456789");
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person.getPhoneNumbers().add("987654321");
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persistObject(person);
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queryPersonsInXML();
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closePersistenceManager();
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}
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public static void defineDynamicPersistentUnit(){
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PersistenceUnitMetaData pumd = new PersistenceUnitMetaData("dynamic-unit", "RESOURCE_LOCAL", null);
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pumd.addProperty("javax.jdo.option.ConnectionURL", "xml:file:myfile_dynamicPMF.xml");
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pumd.addProperty("datanucleus.schema.autoCreateAll", "true");
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pumd.addProperty("datanucleus.xml.indentSize", "4");
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pmf = new JDOPersistenceManagerFactory(pumd, null);
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pm = pmf.getPersistenceManager();
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}
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public static void defineNamedPersistenceManagerFactory(String pmfName){
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pmf = JDOHelper.getPersistenceManagerFactory("XmlDatastore");
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pm = pmf.getPersistenceManager();
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}
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public static void definePersistenceManagerFactoryUsingPropertiesFile(String filePath){
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pmf = JDOHelper.getPersistenceManagerFactory(filePath);
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pm = pmf.getPersistenceManager();
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}
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public static void closePersistenceManager(){
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if(pm!=null && !pm.isClosed()){
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pm.close();
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}
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}
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public static void persistObject(Object obj){
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Transaction tx = pm.currentTransaction();
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try {
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tx.begin();
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pm.makePersistent(obj);
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tx.commit();
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} finally {
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if (tx.isActive()) {
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tx.rollback();
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}
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}
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}
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public static void queryPersonsInXML(){
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Query<Person> query = pm.newQuery(Person.class);
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List<Person> result = query.executeList();
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System.out.println("name: "+result.get(0).getFirstName());
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}
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public static void queryAnnotatedPersonsInXML(){
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Query<AnnotadedPerson> query = pm.newQuery(AnnotadedPerson.class);
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List<AnnotadedPerson> result = query.executeList();
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System.out.println("name: "+result.get(0).getFirstName());
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}
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}

‎libraries/src/main/java/com/baeldung/jdo/xml/Person.java‎

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package com.baeldung.jdo.xml;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import javax.jdo.annotations.Element;
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import javax.jdo.annotations.PersistenceCapable;
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import javax.jdo.annotations.PrimaryKey;
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import javax.xml.bind.annotation.XmlAttribute;
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import javax.xml.bind.annotation.XmlElement;
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import javax.xml.bind.annotation.XmlElementWrapper;
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@PersistenceCapable
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public class Person {
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private long personNum;
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@PrimaryKey
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private String firstName;
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private String lastName;
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private List phoneNumbers = new ArrayList();
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public Person(long personNum, String firstName, String lastName) {
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super();
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this.personNum = personNum;
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this.firstName = firstName;
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this.lastName = lastName;
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}
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public long getPersonNum() {
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return personNum;
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}
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public void setPersonNum(long personNum) {
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this.personNum = personNum;
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}
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public String getFirstName() {
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return firstName;
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}
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public void setFirstName(String firstName) {
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this.firstName = firstName;
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}
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public String getLastName() {
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return lastName;
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}
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public void setLastName(String lastName) {
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this.lastName = lastName;
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}
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public List getPhoneNumbers() {
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return phoneNumbers;
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}
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public void setPhoneNumbers(List phoneNumbers) {
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this.phoneNumbers = phoneNumbers;
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}
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}

‎libraries/src/main/java/com/baeldung/jdo/xml/Product.java‎

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package com.baeldung.jdo.xml;
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import javax.jdo.annotations.IdGeneratorStrategy;
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import javax.jdo.annotations.PersistenceAware;
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import javax.jdo.annotations.PersistenceCapable;
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import javax.jdo.annotations.Persistent;
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import javax.jdo.annotations.PrimaryKey;
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@PersistenceCapable
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public class Product {
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@PrimaryKey
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String id;
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String name;
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String description;
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double price;
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public Product(){
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}
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public Product(String id,String name,String description,double price){
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this.id = id;
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this.name=name;
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this.description = description;
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this.price = price;
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}
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public String getId() {
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return id;
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}
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public void setId(String id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getDescription() {
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return description;
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}
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public void setDescription(String description) {
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this.description = description;
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}
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public double getPrice() {
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return price;
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}
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public void setPrice(double price) {
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this.price = price;
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}
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}

‎libraries/src/main/resources/META-INF/datanucleus.properties‎

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javax.jdo.PersistenceManagerFactoryClass=org.datanucleus.api.jdo.JDOPersistenceManagerFactory
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javax.jdo.option.ConnectionURL= xml:file:myfile-ds.xml
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datanucleus.xml.indentSize=6
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datanucleus.schema.autoCreateAll=true

‎libraries/src/main/resources/META-INF/jdoconfig.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<jdoconfig xmlns="http://xmlns.jcp.org/xml/ns/jdo/jdoconfig"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/jdo/jdoconfig
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http://xmlns.jcp.org/xml/ns/jdo/jdoconfig_3_2.xsd"
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version="3.2">
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<!-- Datastore Txn PMF -->
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<persistence-manager-factory name="XmlDatastore">
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<property name="javax.jdo.PersistenceManagerFactoryClass"
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value="org.datanucleus.api.jdo.JDOPersistenceManagerFactory" />
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<property name="javax.jdo.option.ConnectionURL" value="xml:file:namedPMF-ds.xml" />
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<property name="datanucleus.xml.indentSize" value="6" />
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<property name="datanucleus.schema.autoCreateAll"
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value="true" />
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</persistence-manager-factory>
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</jdoconfig>

‎libraries/src/main/resources/META-INF/package.jdo‎

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<jdo xmlns="http://xmlns.jcp.org/xml/ns/jdo/jdo" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/jdo/jdo http://xmlns.jcp.org/xml/ns/jdo/jdo_3_1.xsd"
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version="3.1">
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<package name="com.baeldung.jdo.xml">
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<class name="Person" detachable="true" schema="/myproduct/people"
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table="person">
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<field name="personNum">
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<extension vendor-name="datanucleus" key="XmlAttribute"
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value="true" />
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</field>
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<field name="firstName" primary-key="true" /> <!-- PK since JAXB requires String -->
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<field name="lastName" />
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<field name="phoneNumbers">
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<collection element-type="java.lang.String" />
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<element column="phoneNumber" />
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</field>
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</class>
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</package>
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</jdo>

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