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SUMMARY: JavaDoc of org.hsqldb.jdbcDriver JAVADOC | Sourc code of org.hsqldb.jdbcDriver SOURCE | Download org.hsqldb.jdbcDriver DOWNLOAD | NESTED | FIELD | CONSTR | METHOD DETAIL: FIELD | CONSTR | METHOD

org.hsqldb
Class jdbcDriver  view jdbcDriver download jdbcDriver.java

java.lang.Object
  extended byorg.hsqldb.jdbcDriver
All Implemented Interfaces:
java.sql.Driver
public class jdbcDriver
extends java.lang.Object
implements java.sql.Driver

Each JDBC driver must supply a class that implements the Driver interface.

The Java SQL framework allows for multiple database drivers.

The DriverManager will try to load as many drivers as it can find and then for any given connection request, it will ask each driver in turn to try to connect to the target URL.

The application developer will normally not need to call any function of the Driver directly. All required calls are made by the DriverManager.

When the HSQL Database Engine Driver class is loaded, it creates an instance of itself and register it with the DriverManager. This means that a user can load and register the HSQL Database Engine driver by calling 

 Class.forName("org.hsqldb.jdbcDriver")
For more information about how to connect to a HSQL Database Engine database, please see jdbcConnection.

As of version 1.7.0 all JDBC 2 methods can be called with jdk 1.1.x. Some of these method calls require int values that are defined in JDBC 2 version of ResultSet. These values are defined in the jdbcResultSet class when it is compiled with jdk 1.1.x. When using the JDBC 2 methods that require those values as parameters or return one of those values, refer to them as follows: (The code will not be compatible with other JDBC 2 driver, which require ResultSet to be used instead of jdbcResultSet) (fredt@users)

jdbcResultSet.FETCH_FORWARD
jdbcResultSet.TYPE_FORWARD_ONLY
jdbcResultSet TYPE_SCROLL_INSENSITIVE
jdbcResultSet.CONCUR_READ_ONLY

Field Summary
(package private) static int MAJOR
           
(package private) static int MINOR
           
(package private) static java.lang.String PRODUCT
           
(package private) static int REVISION
           
(package private) static java.lang.String sStartURL
           
(package private) static java.lang.String VERSION
           
 
Constructor Summary
jdbcDriver()
           
 
Method Summary
 boolean acceptsURL(java.lang.String url)
          Returns true if the driver thinks that it can open a connection to the given URL.
 java.sql.Connection connect(java.lang.String url, java.util.Properties info)
          Attempts to make a database connection to the given URL.
 int getMajorVersion()
          Gets the driver's major version number.
 int getMinorVersion()
          Gets the driver's minor version number.
 java.sql.DriverPropertyInfo[] getPropertyInfo(java.lang.String url, java.util.Properties info)
          Gets information about the possible properties for this driver.
 boolean jdbcCompliant()
          Reports whether this driver is a genuine JDBC COMPLIANTTM driver.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

sStartURL

static final java.lang.String sStartURL
See Also:
Constant Field Values

MAJOR

static final int MAJOR
See Also:
Constant Field Values

MINOR

static final int MINOR
See Also:
Constant Field Values

REVISION

static final int REVISION
See Also:
Constant Field Values

VERSION

static final java.lang.String VERSION
See Also:
Constant Field Values

PRODUCT

static final java.lang.String PRODUCT
See Also:
Constant Field Values
Constructor Detail

jdbcDriver

public jdbcDriver()
Method Detail

connect

public java.sql.Connection connect(java.lang.String url,
                                   java.util.Properties info)
                            throws java.sql.SQLException
Attempts to make a database connection to the given URL. The driver returns "null" if it realizes it is the wrong kind of driver to connect to the given URL. This will be common, as when the JDBC driver manager is asked to connect to a given URL it passes the URL to each loaded driver in turn.

The driver raises a SQLException if it is the right driver to connect to the given URL, but has trouble connecting to the database.

The java.util.Properties argument can be used to passed arbitrary string tag/value pairs as connection arguments.

For HSQL Database Engine, at least "user" and "password" properties must be included in the Properties.

Specified by:
connect in interface java.sql.Driver

acceptsURL

public boolean acceptsURL(java.lang.String url)
Returns true if the driver thinks that it can open a connection to the given URL. Typically drivers will return true if they understand the subprotocol specified in the URL and false if they don't.

Specified by:
acceptsURL in interface java.sql.Driver

getPropertyInfo

public java.sql.DriverPropertyInfo[] getPropertyInfo(java.lang.String url,
                                                     java.util.Properties info)
Gets information about the possible properties for this driver.

The getPropertyInfo method is intended to allow a generic GUI tool to discover what properties it should prompt a human for in order to get enough information to connect to a database. Note that depending on the values the human has supplied so far, additional values may become necessary, so it may be necessary to iterate though several calls to getPropertyInfo. HSQLDB-Specific Information:

HSQLDB 1.7.1 uses the values submitted in info to set the value for each DriverPropertyInfo object returned. It does not use the default value that it would use for the property if the value is null.

Specified by:
getPropertyInfo in interface java.sql.Driver

getMajorVersion

public int getMajorVersion()
Gets the driver's major version number.

Specified by:
getMajorVersion in interface java.sql.Driver

getMinorVersion

public int getMinorVersion()
Gets the driver's minor version number.

Specified by:
getMinorVersion in interface java.sql.Driver

jdbcCompliant

public boolean jdbcCompliant()
Reports whether this driver is a genuine JDBC COMPLIANTTM driver. A driver may only report true here if it passes the JDBC compliance tests; otherwise it is required to return false. JDBC compliance requires full support for the JDBC API and full support for SQL 92 Entry Level. It is expected that JDBC compliant drivers will be available for all the major commercial databases.

HSQL Database Engine currently does not yet support all required SQL 92 Entry Level functionality and thus returns false. The features that are missing are currently 'HAVING' and views. It looks like other drivers return true but do not support all features.

This method is not intended to encourage the development of non-JDBC compliant drivers, but is a recognition of the fact that some vendors are interested in using the JDBC API and framework for lightweight databases that do not support full database functionality, or for special databases such as document information retrieval where a SQL implementation may not be feasible.

Specified by:
jdbcCompliant in interface java.sql.Driver
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Home >> All >> org >> [ hsqldb overview ]  PREV CLASS  NEXT CLASS
SUMMARY: JavaDoc of org.hsqldb.jdbcDriver JAVADOC | Sourc code of org.hsqldb.jdbcDriver SOURCE | Download org.hsqldb.jdbcDriver DOWNLOAD | NESTED | FIELD | CONSTR | METHOD DETAIL: FIELD | CONSTR | METHOD