Java Hibernate-Sqlite Simple Example 2018-04-22

java-hibernate-sqlite.md

Java Hibernate/Sqlite Example

Dependencies

// https://mvnrepository.com/artifact/org.hibernate/hibernate-core
compile group: 'org.hibernate', name: 'hibernate-core', version: '5.2.16.Final'

// https://mvnrepository.com/artifact/org.xerial/sqlite-jdbc
compile group: 'org.xerial', name: 'sqlite-jdbc', version: '3.21.0.1'

// https://mvnrepository.com/artifact/org.hibernate.dialect/sqlite-dialect
compile group: 'org.hibernate.dialect', name: 'sqlite-dialect', version: '0.1.0'

// https://mvnrepository.com/artifact/org.testng/testng
testCompile group: 'org.testng', name: 'testng', version: '6.14.3'

Setup Code

Message.java

import javax.persistence.*;

@Entity
public class Message {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    Long id;
    @Column(nullable = false)
    String text;

    public Message(String text) { setText(text); }
    public Message() { }
    public Long getId() { return id; }
    public void setId(Long id) { this.id = id; }
    public String getText() { return text; }
    public void setText(String text) { this.text = text; }
    @Override
    public String toString() {
        return "Message{" + "id=" + getId() + ", text='" + getText() + '\'' + '}';
    }
}

TestPersistenceTest.java

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
import org.testng.Assert;

import java.util.List;

public class PersistenceTest {
    SessionFactory factory;

    @BeforeClass
    public void setup() {

        Configuration configuration = new Configuration()
                .addAnnotatedClass(Message.class)
                .setProperty("hibernate.connection.driver_class", "org.sqlite.JDBC")
                .setProperty("hibernate.connection.url", "jdbc:sqlite:test.sqlite")
                .setProperty("hibernate.dialect", "org.hibernate.dialect.SQLiteDialect")
                .setProperty("hibernate.show_sql", "true")
                .setProperty("hibernate.hdm2ddl.auto", "create-drop");
        configuration.configure();

        factory = new Configuration().configure().buildSessionFactory();
    }

    @Test
    public void saveMessage() {
        Message message = new Message("Hello, world");
        Session session = factory.openSession();
        Transaction tx = session.beginTransaction();
        session.persist(message);
        tx.commit();
        session.close();
    }

    @Test(dependsOnMethods = "saveMessage")
    public void readMessage() {
        Session session = factory.openSession();
        @SuppressWarnings("unchecked")
        List<Message> list = (List<Message>) session.createQuery("from Message").list();
        if (list.size() > 1) {
            Assert.fail("Message configuration in error; table should contain only one."
                    +" Set ddl to create-drop.");
        }
        if (list.size() == 0) {
            Assert.fail("Read of initial message failed; check saveMessage() for errors."
                    +" How did this test run?");
        }
        for (Message m : list) {
            System.out.println(m);
        }
        session.close();
    }
}

org.hibernate.dialect.SQLiteDialect

/*
 * The author disclaims copyright to this source code.  In place of
 * a legal notice, here is a blessing:
 *
 *    May you do good and not evil.
 *    May you find forgiveness for yourself and forgive others.
 *    May you share freely, never taking more than you give.
 *
 */
package org.hibernate.dialect;

import java.sql.Types;

import org.hibernate.dialect.function.AbstractAnsiTrimEmulationFunction;
import org.hibernate.dialect.function.NoArgSQLFunction;
import org.hibernate.dialect.function.SQLFunction;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.type.StandardBasicTypes;

public class SQLiteDialect extends Dialect {
    public SQLiteDialect() {
        registerColumnType(Types.BIT, "integer");
        registerColumnType(Types.TINYINT, "tinyint");
        registerColumnType(Types.SMALLINT, "smallint");
        registerColumnType(Types.INTEGER, "integer");
        registerColumnType(Types.BIGINT, "bigint");
        registerColumnType(Types.FLOAT, "float");
        registerColumnType(Types.REAL, "real");
        registerColumnType(Types.DOUBLE, "double");
        registerColumnType(Types.NUMERIC, "numeric");
        registerColumnType(Types.DECIMAL, "decimal");
        registerColumnType(Types.CHAR, "char");
        registerColumnType(Types.VARCHAR, "varchar");
        registerColumnType(Types.LONGVARCHAR, "longvarchar");
        registerColumnType(Types.DATE, "date");
        registerColumnType(Types.TIME, "time");
        registerColumnType(Types.TIMESTAMP, "timestamp");
        registerColumnType(Types.BINARY, "blob");
        registerColumnType(Types.VARBINARY, "blob");
        registerColumnType(Types.LONGVARBINARY, "blob");
        // registerColumnType(Types.NULL, "null");
        registerColumnType(Types.BLOB, "blob");
        registerColumnType(Types.CLOB, "clob");
        registerColumnType(Types.BOOLEAN, "boolean");

        registerFunction( "concat", new VarArgsSQLFunction(StandardBasicTypes.STRING, "", "||", "") );
        registerFunction( "mod", new SQLFunctionTemplate(StandardBasicTypes.INTEGER, "?1 % ?2" ) );
        registerFunction( "quote", new StandardSQLFunction("quote", StandardBasicTypes.STRING) );
        registerFunction( "random", new NoArgSQLFunction("random", StandardBasicTypes.INTEGER) );
        registerFunction( "round", new StandardSQLFunction("round") );
        registerFunction( "substr", new StandardSQLFunction("substr", StandardBasicTypes.STRING) );
        registerFunction( "trim", new AbstractAnsiTrimEmulationFunction() {
            protected SQLFunction resolveBothSpaceTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "trim(?1)");
            }

            protected SQLFunction resolveBothSpaceTrimFromFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "trim(?2)");
            }

            protected SQLFunction resolveLeadingSpaceTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "ltrim(?1)");
            }

            protected SQLFunction resolveTrailingSpaceTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "rtrim(?1)");
            }

            protected SQLFunction resolveBothTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "trim(?1, ?2)");
            }

            protected SQLFunction resolveLeadingTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "ltrim(?1, ?2)");
            }

            protected SQLFunction resolveTrailingTrimFunction() {
                return new SQLFunctionTemplate(StandardBasicTypes.STRING, "rtrim(?1, ?2)");
            }
        } );
    }

    public boolean supportsIdentityColumns() {
        return true;
    }

  /*
  public boolean supportsInsertSelectIdentity() {
    return true; // As specify in NHibernate dialect
  }
  */

    public boolean hasDataTypeInIdentityColumn() {
        return false; // As specify in NHibernate dialect
    }

  /*
  public String appendIdentitySelectToInsert(String insertString) {
    return new StringBuffer(insertString.length()+30). // As specify in NHibernate dialect
      append(insertString).
      append("; ").append(getIdentitySelectString()).
      toString();
  }
  */

    public String getIdentityColumnString() {
        // return "integer primary key autoincrement";
        return "integer";
    }

    public String getIdentitySelectString() {
        return "select last_insert_rowid()";
    }

    public boolean supportsLimit() {
        return true;
    }

    protected String getLimitString(String query, boolean hasOffset) {
        return new StringBuffer(query.length()+20).
                append(query).
                append(hasOffset ? " limit ? offset ?" : " limit ?").
                toString();
    }

    public boolean supportsTemporaryTables() {
        return true;
    }

    public String getCreateTemporaryTableString() {
        return "create temporary table if not exists";
    }

    public boolean dropTemporaryTableAfterUse() {
        return false;
    }

    public boolean supportsCurrentTimestampSelection() {
        return true;
    }

    public boolean isCurrentTimestampSelectStringCallable() {
        return false;
    }

    public String getCurrentTimestampSelectString() {
        return "select current_timestamp";
    }

    public boolean supportsUnionAll() {
        return true;
    }

    public boolean hasAlterTable() {
        return false; // As specify in NHibernate dialect
    }

    public boolean dropConstraints() {
        return false;
    }

    public String getAddColumnString() {
        return "add column";
    }

    public String getForUpdateString() {
        return "";
    }

    public boolean supportsOuterJoinForUpdate() {
        return false;
    }

    public String getDropForeignKeyString() {
        throw new UnsupportedOperationException("No drop foreign key syntax supported by SQLiteDialect");
    }

    public String getAddForeignKeyConstraintString(String constraintName,
                                                   String[] foreignKey, String referencedTable, String[] primaryKey,
                                                   boolean referencesPrimaryKey) {
        throw new UnsupportedOperationException("No add foreign key syntax supported by SQLiteDialect");
    }

    public String getAddPrimaryKeyConstraintString(String constraintName) {
        throw new UnsupportedOperationException("No add primary key syntax supported by SQLiteDialect");
    }

    public boolean supportsIfExistsBeforeTableName() {
        return true;
    }

    public boolean supportsCascadeDelete() {
        return false;
    }
}

References

• https://stackoverflow.com/questions/17587753/does-hibernate-fully-support-sqlite
  • Hibernate 3: https://github.com/kemitix/sqlite-dialect

    // https://mvnrepository.com/artifact/net.kemitix/sqlite-dialect 
    compile group: 'net.kemitix', name: 'sqlite-dialect', version: '0.1.0'
    

  • Hibernate 4: https://github.com/EnigmaBridge/hibernate4-sqlite-dialect

    // https://mvnrepository.com/artifact/com.enigmabridge/hibernate4-sqlite-dialect
    compile group: 'com.enigmabridge', name: 'hibernate4-sqlite-dialect', version: '0.1.2'
    

  • Hibernate 5: https://github.com/gwenn/sqlite-dialect/

    • maven - add jitpack repository:

      <repositories>
          <repository>
              <id>jitpack.io</id>
              <url>https://jitpack.io</url>
          </repository>
      </repositories>

      <dependency>
          <groupId>com.github.gwenn</groupId>
          <artifactId>sqlite-dialect</artifactId>
          <version>master</version>
      </dependency>

    • gradle - add jitpack repository:

      repositories {
          maven {
              url "https://jitpack.io"
          }
      }

      dependencies {
          compile group: 'com.github.gwenn', name: 'sqlite-dialect', version: 'master'
      }