JDBCTask (Apache Ant API)
Date: 2018-03-24

org.apache.tools.ant.taskdefs

## Class JDBCTask

- java.lang.Object
- - org.apache.tools.ant.ProjectComponent
  - - org.apache.tools.ant.Task
    - - org.apache.tools.ant.taskdefs.JDBCTask

- All Implemented Interfaces:
    java.lang.Cloneable
  Direct Known Subclasses:
    SQLExec

      public abstract class JDBCTask
      extends Task

  Handles JDBC configuration needed by SQL type tasks.

  The following example class prints the contents of the first column of each row in TableName.

      package examples;

      import java.sql.Connection;
      import java.sql.ResultSet;
      import java.sql.SQLException;
      import java.sql.Statement;

      import org.apache.tools.ant.BuildException;
      import org.apache.tools.ant.taskdefs.JDBCTask;

      public class SQLExampleTask extends JDBCTask {

          private String tableName;

          public void execute() throws BuildException {
              Connection conn = getConnection();
              Statement stmt=null;
              try {
                  if (tableName == null) {
                      throw new BuildException("TableName must be specified",location);
                  }
                  String sql = "SELECT * FROM "+tableName;
                  stmt= conn.createStatement();
                  ResultSet rs = stmt.executeQuery(sql);
                  while (rs.next()) {
                      log(rs.getObject(1).toString());
                  }
              } catch (SQLException e) {

              } finally {
                  if (stmt != null) {
                      try {stmt.close();}catch (SQLException ignore) {}
                  }
                  if (conn != null) {
                      try {conn.close();}catch (SQLException ignore) {}
                  }
              }
          }
          public void setTableName(String tableName) {
              this.tableName = tableName;
          }

      }

  Since:
    Ant 1.5

- - ### Field Summary

    - ### Fields inherited from class org.apache.tools.ant.Task

      `target, taskName, taskType, wrapper`

    - ### Fields inherited from class org.apache.tools.ant.ProjectComponent

      `description, location, project`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `JDBCTask()`

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addConnectionProperty(Property var)` Additional properties to put into the JDBC connection string.
    `Path` | `createClasspath()` Add a path to the classpath for loading the driver.
    `Path` | `getClasspath()` Gets the classpath.
    `protected java.sql.Connection` | `getConnection()` Creates a new Connection as using the driver, url, userid and password specified.
    `protected AntClassLoader` | `getLoader()` Get the classloader used to create a driver.
    `protected static java.util.Hashtable<java.lang.String,AntClassLoader>` | `getLoaderMap()` Get the cache of loaders and drivers.
    `java.lang.String` | `getPassword()` Gets the password.
    `java.lang.String` | `getRdbms()` Gets the rdbms.
    `java.lang.String` | `getUrl()` Gets the url.
    `java.lang.String` | `getUserId()` Gets the userId.
    `java.lang.String` | `getVersion()` Gets the version.
    `boolean` | `isAutocommit()` Gets the autocommit.
    `void` | `isCaching(boolean value)` Set the caching attribute.
    `protected boolean` | `isValidRdbms(java.sql.Connection conn)` Verify we are connected to the correct RDBMS
    `void` | `setAutocommit(boolean autocommit)` Auto commit flag for database connection; optional, default false.
    `void` | `setCaching(boolean enable)` Caching loaders / driver.
    `void` | `setClasspath(Path classpath)` Sets the classpath for loading the driver.
    `void` | `setClasspathRef(Reference r)` Set the classpath for loading the driver using the classpath reference.
    `void` | `setDriver(java.lang.String driver)` Class name of the JDBC driver; required.
    `void` | `setFailOnConnectionError(boolean b)` whether the task should cause the build to fail if it cannot connect to the database.
    `void` | `setPassword(java.lang.String password)` Sets the password; required.
    `void` | `setRdbms(java.lang.String rdbms)` Execute task only if the lower case product name of the DB matches this
    `void` | `setUrl(java.lang.String url)` Sets the database connection URL; required.
    `void` | `setUserid(java.lang.String userId)` Set the user name for the connection; required.
    `void` | `setVersion(java.lang.String version)` Sets the version string, execute task only if rdbms version match; optional.

    - ### Methods inherited from class org.apache.tools.ant.Task

      `bindToOwner, execute, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleErrorFlush, handleErrorOutput, handleFlush, handleInput, handleOutput, init, isInvalid, log, log, log, log, maybeConfigure, perform, reconfigure, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType`

    - ### Methods inherited from class org.apache.tools.ant.ProjectComponent

      `clone, getDescription, getLocation, getProject, setDescription, setLocation, setProject`

    - ### Methods inherited from class java.lang.Object

      `equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### JDBCTask

          public JDBCTask()

  - ### Method Detail

    - #### setClasspath

          public void setClasspath(Path classpath)

      Sets the classpath for loading the driver.
      Parameters:
        `classpath` - The classpath to set

    - #### setCaching

          public void setCaching(boolean enable)

      Caching loaders / driver. This is to avoid getting an OutOfMemoryError when calling this task multiple times in a row; default: true
      Parameters:
        `enable` - a `boolean` value

    - #### createClasspath

          public Path createClasspath()

      Add a path to the classpath for loading the driver.
      Returns:
        a path to be configured

    - #### setClasspathRef

          public void setClasspathRef(Reference r)

      Set the classpath for loading the driver using the classpath reference.
      Parameters:
        `r` - a reference to a classpath

    - #### setDriver

          public void setDriver(java.lang.String driver)

      Class name of the JDBC driver; required.
      Parameters:
        `driver` - The driver to set

    - #### setUrl

          public void setUrl(java.lang.String url)

      Sets the database connection URL; required.
      Parameters:
        `url` - The url to set

    - #### setPassword

          public void setPassword(java.lang.String password)

      Sets the password; required.
      Parameters:
        `password` - The password to set

    - #### setAutocommit

          public void setAutocommit(boolean autocommit)

      Auto commit flag for database connection; optional, default false.
      Parameters:
        `autocommit` - The autocommit to set

    - #### setRdbms

          public void setRdbms(java.lang.String rdbms)

      Execute task only if the lower case product name of the DB matches this
      Parameters:
        `rdbms` - The rdbms to set

    - #### setVersion

          public void setVersion(java.lang.String version)

      Sets the version string, execute task only if rdbms version match; optional.
      Parameters:
        `version` - The version to set

    - #### setFailOnConnectionError

          public void setFailOnConnectionError(boolean b)

      whether the task should cause the build to fail if it cannot connect to the database.
      Parameters:
        `b` - boolean
      Since:
        Ant 1.8.0

    - #### isValidRdbms

          protected boolean isValidRdbms(java.sql.Connection conn)

      Verify we are connected to the correct RDBMS
      Parameters:
        `conn` - the jdbc connection
      Returns:
        true if we are connected to the correct RDBMS

    - #### getLoaderMap

          protected static java.util.Hashtable<java.lang.String,AntClassLoader> getLoaderMap()

      Get the cache of loaders and drivers.
      Returns:
        a hashtable

    - #### getLoader

          protected AntClassLoader getLoader()

      Get the classloader used to create a driver.
      Returns:
        the classloader

    - #### addConnectionProperty

          public void addConnectionProperty(Property var)

      Additional properties to put into the JDBC connection string.
      Parameters:
        `var` - Property
      Since:
        Ant 1.8.0

    - #### getConnection

          protected java.sql.Connection getConnection()
                                               throws BuildException

      Creates a new Connection as using the driver, url, userid and password specified. The calling method is responsible for closing the connection.
      Returns:
        Connection the newly created connection or null if the connection failed and failOnConnectionError is false.
      Throws:
        `BuildException` - if the UserId/Password/Url is not set or there is no suitable driver or the driver fails to load.

    - #### isCaching

          public void isCaching(boolean value)

      Set the caching attribute.
      Parameters:
        `value` - a `boolean` value

    - #### getClasspath

          public Path getClasspath()

      Gets the classpath.
      Returns:
        Returns a Path

    - #### isAutocommit

          public boolean isAutocommit()

      Gets the autocommit.
      Returns:
        Returns a boolean

    - #### getUrl

          public java.lang.String getUrl()

      Gets the url.
      Returns:
        Returns a String

    - #### getUserId

          public java.lang.String getUserId()

      Gets the userId.
      Returns:
        Returns a String

    - #### setUserid

          public void setUserid(java.lang.String userId)

      Set the user name for the connection; required.
      Parameters:
        `userId` - The userId to set

    - #### getPassword

          public java.lang.String getPassword()

      Gets the password.
      Returns:
        Returns a String

    - #### getRdbms

          public java.lang.String getRdbms()

      Gets the rdbms.
      Returns:
        Returns a String

    - #### getVersion

          public java.lang.String getVersion()

      Gets the version.
      Returns:
        Returns a String