BAEL-20262: Migrate spring-exceptions module to the com.baeldung package

spring-exceptions/src/main/java/com/baeldung/persistence/Setup.java

@@ -0,0 +1,26 @@
+package com.baeldung.persistence;
+
+import org.springframework.context.ApplicationListener;
+import org.springframework.context.event.ContextRefreshedEvent;
+import org.springframework.stereotype.Component;
+
+@Component
+public class Setup implements ApplicationListener<ContextRefreshedEvent> {
+
+    private boolean setupDone;
+
+    public Setup() {
+        super();
+    }
+
+    //
+
+    @Override
+    public final void onApplicationEvent(final ContextRefreshedEvent event) {
+        if (!setupDone) {
+            System.out.println();
+            setupDone = true;
+        }
+    }
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/common/AbstractHibernateDao.java

@@ -0,0 +1,65 @@
+package com.baeldung.persistence.common;
+
+import java.io.Serializable;
+import java.util.List;
+
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import com.google.common.base.Preconditions;
+
+@SuppressWarnings("unchecked")
+public abstract class AbstractHibernateDao<T extends Serializable> implements IOperations<T> {
+    private Class<T> clazz;
+
+    @Autowired
+    private SessionFactory sessionFactory;
+
+    // API
+
+    protected final void setClazz(final Class<T> clazzToSet) {
+        clazz = Preconditions.checkNotNull(clazzToSet);
+    }
+
+    @Override
+    public final T findOne(final long id) {
+        return (T) getCurrentSession().get(clazz, id);
+    }
+
+    @Override
+    public final List<T> findAll() {
+        return getCurrentSession().createQuery("from " + clazz.getName()).list();
+    }
+
+    @Override
+    public final void create(final T entity) {
+        Preconditions.checkNotNull(entity);
+        // getCurrentSession().persist(entity);
+        getCurrentSession().saveOrUpdate(entity);
+    }
+
+    @Override
+    public final T update(final T entity) {
+        Preconditions.checkNotNull(entity);
+        return (T) getCurrentSession().merge(entity);
+    }
+
+    @Override
+    public final void delete(final T entity) {
+        Preconditions.checkNotNull(entity);
+        getCurrentSession().delete(entity);
+    }
+
+    @Override
+    public final void deleteById(final long entityId) {
+        final T entity = findOne(entityId);
+        Preconditions.checkState(entity != null);
+        delete(entity);
+    }
+
+    protected final Session getCurrentSession() {
+        return sessionFactory.getCurrentSession();
+    }
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/common/AbstractService.java

@@ -0,0 +1,43 @@
+package com.baeldung.persistence.common;
+
+import java.io.Serializable;
+import java.util.List;
+
+import org.springframework.transaction.annotation.Transactional;
+
+@Transactional
+public abstract class AbstractService<T extends Serializable> implements IOperations<T> {
+
+    @Override
+    public T findOne(final long id) {
+        return getDao().findOne(id);
+    }
+
+    @Override
+    public List<T> findAll() {
+        return getDao().findAll();
+    }
+
+    @Override
+    public void create(final T entity) {
+        getDao().create(entity);
+    }
+
+    @Override
+    public T update(final T entity) {
+        return getDao().update(entity);
+    }
+
+    @Override
+    public void delete(final T entity) {
+        getDao().delete(entity);
+    }
+
+    @Override
+    public void deleteById(final long entityId) {
+        getDao().deleteById(entityId);
+    }
+
+    protected abstract IOperations<T> getDao();
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/common/IOperations.java

@@ -0,0 +1,20 @@
+package com.baeldung.persistence.common;
+
+import java.io.Serializable;
+import java.util.List;
+
+public interface IOperations<T extends Serializable> {
+
+    T findOne(final long id);
+
+    List<T> findAll();
+
+    void create(final T entity);
+
+    T update(final T entity);
+
+    void delete(final T entity);
+
+    void deleteById(final long entityId);
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/dao/IChildDao.java

@@ -0,0 +1,8 @@
+package com.baeldung.persistence.dao;
+
+import com.baeldung.persistence.common.IOperations;
+import com.baeldung.persistence.model.Child;
+
+public interface IChildDao extends IOperations<Child> {
+    //
+}

spring-exceptions/src/main/java/com/baeldung/persistence/dao/IFooDao.java

@@ -0,0 +1,8 @@
+package com.baeldung.persistence.dao;
+
+import com.baeldung.persistence.common.IOperations;
+import com.baeldung.persistence.model.Foo;
+
+public interface IFooDao extends IOperations<Foo> {
+    //
+}

spring-exceptions/src/main/java/com/baeldung/persistence/dao/IParentDao.java

@@ -0,0 +1,8 @@
+package com.baeldung.persistence.dao;
+
+import com.baeldung.persistence.common.IOperations;
+import com.baeldung.persistence.model.Parent;
+
+public interface IParentDao extends IOperations<Parent> {
+    //
+}

spring-exceptions/src/main/java/com/baeldung/persistence/dao/impl/ChildDao.java

@@ -0,0 +1,24 @@
+package com.baeldung.persistence.dao.impl;
+
+import com.baeldung.persistence.common.AbstractHibernateDao;
+import com.baeldung.persistence.model.Child;
+import com.baeldung.persistence.dao.IChildDao;
+import org.hibernate.SessionFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class ChildDao extends AbstractHibernateDao<Child> implements IChildDao {
+
+    @Autowired
+    private SessionFactory sessionFactory;
+
+    public ChildDao() {
+        super();
+
+        setClazz(Child.class);
+    }
+
+    // API
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/dao/impl/FooDao.java

@@ -0,0 +1,24 @@
+package com.baeldung.persistence.dao.impl;
+
+import com.baeldung.persistence.common.AbstractHibernateDao;
+import com.baeldung.persistence.dao.IFooDao;
+import com.baeldung.persistence.model.Foo;
+import org.hibernate.SessionFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class FooDao extends AbstractHibernateDao<Foo> implements IFooDao {
+
+    @Autowired
+    private SessionFactory sessionFactory;
+
+    public FooDao() {
+        super();
+
+        setClazz(Foo.class);
+    }
+
+    // API
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/dao/impl/ParentDao.java

@@ -0,0 +1,24 @@
+package com.baeldung.persistence.dao.impl;
+
+import com.baeldung.persistence.common.AbstractHibernateDao;
+import com.baeldung.persistence.model.Parent;
+import com.baeldung.persistence.dao.IParentDao;
+import org.hibernate.SessionFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class ParentDao extends AbstractHibernateDao<Parent> implements IParentDao {
+
+    @Autowired
+    private SessionFactory sessionFactory;
+
+    public ParentDao() {
+        super();
+
+        setClazz(Parent.class);
+    }
+
+    // API
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/model/Child.java

@@ -0,0 +1,51 @@
+package com.baeldung.persistence.model;
+
+import java.io.Serializable;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.OneToOne;
+
+@Entity
+public class Child implements Serializable {
+
+    @Id
+    @GeneratedValue
+    private long id;
+
+    @OneToOne(mappedBy = "child")
+    private Parent parent;
+
+    public Child() {
+        super();
+    }
+
+    // API
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(final long id) {
+        this.id = id;
+    }
+
+    public Parent getParent() {
+        return parent;
+    }
+
+    public void setParent(final Parent parent) {
+        this.parent = parent;
+    }
+
+    //
+
+    @Override
+    public String toString() {
+        final StringBuilder builder = new StringBuilder();
+        builder.append("Child [id=").append(id).append("]");
+        return builder.toString();
+    }
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/model/Foo.java

@@ -0,0 +1,83 @@
+package com.baeldung.persistence.model;
+
+import java.io.Serializable;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class Foo implements Serializable {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long id;
+
+    @Column(nullable = false)
+    private String name;
+
+    public Foo() {
+        super();
+    }
+
+    public Foo(final String name) {
+        super();
+
+        this.name = name;
+    }
+
+    // API
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(final long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(final String name) {
+        this.name = name;
+    }
+
+    //
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((name == null) ? 0 : name.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        final Foo other = (Foo) obj;
+        if (name == null) {
+            if (other.name != null)
+                return false;
+        } else if (!name.equals(other.name))
+            return false;
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder builder = new StringBuilder();
+        builder.append("Foo [name=").append(name).append("]");
+        return builder.toString();
+    }
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/model/Parent.java

@@ -0,0 +1,60 @@
+package com.baeldung.persistence.model;
+
+import java.io.Serializable;
+
+import javax.persistence.CascadeType;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.OneToOne;
+
+@Entity
+public class Parent implements Serializable {
+
+    @Id
+    @GeneratedValue
+    private long id;
+
+    @OneToOne(cascade = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH, CascadeType.DETACH })
+    @JoinColumn(name = "child_fk")
+    private Child child;
+
+    public Parent() {
+        super();
+    }
+
+    public Parent(final Child child) {
+        super();
+
+        this.child = child;
+    }
+
+    // API
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(final long id) {
+        this.id = id;
+    }
+
+    public Child getChild() {
+        return child;
+    }
+
+    public void setChild(final Child child) {
+        this.child = child;
+    }
+
+    //
+
+    @Override
+    public String toString() {
+        final StringBuilder builder = new StringBuilder();
+        builder.append("Parent [id=").append(id).append("]");
+        return builder.toString();
+    }
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/service/IChildService.java

@@ -0,0 +1,8 @@
+package com.baeldung.persistence.service;
+
+import com.baeldung.persistence.common.IOperations;
+import com.baeldung.persistence.model.Child;
+
+public interface IChildService extends IOperations<Child> {
+    //
+}

spring-exceptions/src/main/java/com/baeldung/persistence/service/IFooService.java

@@ -0,0 +1,8 @@
+package com.baeldung.persistence.service;
+
+import com.baeldung.persistence.common.IOperations;
+import com.baeldung.persistence.model.Foo;
+
+public interface IFooService extends IOperations<Foo> {
+    //
+}

spring-exceptions/src/main/java/com/baeldung/persistence/service/IParentService.java

@@ -0,0 +1,8 @@
+package com.baeldung.persistence.service;
+
+import com.baeldung.persistence.common.IOperations;
+import com.baeldung.persistence.model.Parent;
+
+public interface IParentService extends IOperations<Parent> {
+    //
+}

spring-exceptions/src/main/java/com/baeldung/persistence/service/impl/ChildService.java

@@ -0,0 +1,28 @@
+package com.baeldung.persistence.service.impl;
+
+import com.baeldung.persistence.common.AbstractService;
+import com.baeldung.persistence.common.IOperations;
+import com.baeldung.persistence.service.IChildService;
+import com.baeldung.persistence.dao.IChildDao;
+import com.baeldung.persistence.model.Child;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class ChildService extends AbstractService<Child> implements IChildService {
+
+    @Autowired
+    private IChildDao dao;
+
+    public ChildService() {
+        super();
+    }
+
+    // API
+
+    @Override
+    protected IOperations<Child> getDao() {
+        return dao;
+    }
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/service/impl/FooService.java

@@ -0,0 +1,28 @@
+package com.baeldung.persistence.service.impl;
+
+import com.baeldung.persistence.common.AbstractService;
+import com.baeldung.persistence.common.IOperations;
+import com.baeldung.persistence.service.IFooService;
+import com.baeldung.persistence.dao.IFooDao;
+import com.baeldung.persistence.model.Foo;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class FooService extends AbstractService<Foo> implements IFooService {
+
+    @Autowired
+    private IFooDao dao;
+
+    public FooService() {
+        super();
+    }
+
+    // API
+
+    @Override
+    protected IOperations<Foo> getDao() {
+        return dao;
+    }
+
+}

spring-exceptions/src/main/java/com/baeldung/persistence/service/impl/ParentService.java

@@ -0,0 +1,28 @@
+package com.baeldung.persistence.service.impl;
+
+import com.baeldung.persistence.common.AbstractService;
+import com.baeldung.persistence.common.IOperations;
+import com.baeldung.persistence.model.Parent;
+import com.baeldung.persistence.service.IParentService;
+import com.baeldung.persistence.dao.IParentDao;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class ParentService extends AbstractService<Parent> implements IParentService {
+
+    @Autowired
+    private IParentDao dao;
+
+    public ParentService() {
+        super();
+    }
+
+    // API
+
+    @Override
+    protected IOperations<Parent> getDao() {
+        return dao;
+    }
+
+}