databaseconnection.html

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<A NAME="LONG"><!-- --></A><H3>
LONG</H3>
<PRE>
public static final int <B>LONG</B></PRE>
<DL>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#weka.core.converters.DatabaseConnection.LONG">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="FLOAT"><!-- --></A><H3>
FLOAT</H3>
<PRE>
public static final int <B>FLOAT</B></PRE>
<DL>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#weka.core.converters.DatabaseConnection.FLOAT">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="DATE"><!-- --></A><H3>
DATE</H3>
<PRE>
public static final int <B>DATE</B></PRE>
<DL>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#weka.core.converters.DatabaseConnection.DATE">Constant Field Values</A></DL>
</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

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<A NAME="DatabaseConnection()"><!-- --></A><H3>
DatabaseConnection</H3>
<PRE>
public <B>DatabaseConnection</B>()
                   throws java.lang.Exception</PRE>
<DL>
<DD>Sets up the database drivers
<P>

<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if an error occurs</DL>

<!-- ============ METHOD DETAIL ========== -->

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<A NAME="setUsername(java.lang.String)"><!-- --></A><H3>
setUsername</H3>
<PRE>
public void <B>setUsername</B>(java.lang.String&nbsp;username)</PRE>
<DL>
<DD>Set the database username
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>username</CODE> - Username for Database.</DL>
</DD>
</DL>
<HR>

<A NAME="getUsername()"><!-- --></A><H3>
getUsername</H3>
<PRE>
public java.lang.String <B>getUsername</B>()</PRE>
<DL>
<DD>Get the database username
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Database username</DL>
</DD>
</DL>
<HR>

<A NAME="setPassword(java.lang.String)"><!-- --></A><H3>
setPassword</H3>
<PRE>
public void <B>setPassword</B>(java.lang.String&nbsp;password)</PRE>
<DL>
<DD>Set the database password
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>password</CODE> - Password for Database.</DL>
</DD>
</DL>
<HR>

<A NAME="getPassword()"><!-- --></A><H3>
getPassword</H3>
<PRE>
public java.lang.String <B>getPassword</B>()</PRE>
<DL>
<DD>Get the database password
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Password for Database.</DL>
</DD>
</DL>
<HR>

<A NAME="databaseURLTipText()"><!-- --></A><H3>
databaseURLTipText</H3>
<PRE>
public java.lang.String <B>databaseURLTipText</B>()</PRE>
<DL>
<DD>Returns the tip text for this property
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>tip text for this property suitable for
 displaying in the explorer/experimenter gui</DL>
</DD>
</DL>
<HR>

<A NAME="getDatabaseURL()"><!-- --></A><H3>
getDatabaseURL</H3>
<PRE>
public java.lang.String <B>getDatabaseURL</B>()</PRE>
<DL>
<DD>Get the value of DatabaseURL.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Value of DatabaseURL.</DL>
</DD>
</DL>
<HR>

<A NAME="setDatabaseURL(java.lang.String)"><!-- --></A><H3>
setDatabaseURL</H3>
<PRE>
public void <B>setDatabaseURL</B>(java.lang.String&nbsp;newDatabaseURL)</PRE>
<DL>
<DD>Set the value of DatabaseURL.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>newDatabaseURL</CODE> - Value to assign to DatabaseURL.</DL>
</DD>
</DL>
<HR>

<A NAME="getUpperCase()"><!-- --></A><H3>
getUpperCase</H3>
<PRE>
public boolean <B>getUpperCase</B>()</PRE>
<DL>
<DD>Check if the property checkUpperCaseNames in the DatabaseUtils file is set to true or false.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>true if the property checkUpperCaseNames in the DatabaseUtils file is set to true, false otherwise.</DL>
</DD>
</DL>
<HR>

<A NAME="arrayToString(java.lang.Object[])"><!-- --></A><H3>
arrayToString</H3>
<PRE>
public static java.lang.String <B>arrayToString</B>(java.lang.Object[]&nbsp;array)</PRE>
<DL>
<DD>Converts an array of objects to a string by inserting a space
 between each element. Null elements are printed as ?
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>array</CODE> - the array of objects
<DT><B>Returns:</B><DD>a value of type 'String'</DL>
</DD>
</DL>
<HR>

<A NAME="typeName(int)"><!-- --></A><H3>
typeName</H3>
<PRE>
public static java.lang.String <B>typeName</B>(int&nbsp;type)</PRE>
<DL>
<DD>Returns the name associated with a SQL type.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>type</CODE> - the SQL type
<DT><B>Returns:</B><DD>the name of the type</DL>
</DD>
</DL>
<HR>

<A NAME="connectToDatabase()"><!-- --></A><H3>
connectToDatabase</H3>
<PRE>
public void <B>connectToDatabase</B>()
                       throws java.lang.Exception</PRE>
<DL>
<DD>Opens a connection to the database
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="disconnectFromDatabase()"><!-- --></A><H3>
disconnectFromDatabase</H3>
<PRE>
public void <B>disconnectFromDatabase</B>()
                            throws java.lang.Exception</PRE>
<DL>
<DD>Closes the connection to the database.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="getMetaData()"><!-- --></A><H3>
getMetaData</H3>
<PRE>
public java.sql.DatabaseMetaData <B>getMetaData</B>()
                                      throws java.lang.Exception</PRE>
<DL>
<DD>Gets meta data for the database connection object.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the meta data.
<DT><B>Throws:</B>
<DD><CODE>java.sql.SQLException</CODE> - if an error occurs
<DD><CODE>java.lang.Exception</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="isConnected()"><!-- --></A><H3>
isConnected</H3>
<PRE>
public boolean <B>isConnected</B>()</PRE>
<DL>
<DD>Returns true if a database connection is active.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a value of type 'boolean'</DL>
</DD>
</DL>
<HR>

<A NAME="execute(java.lang.String)"><!-- --></A><H3>
execute</H3>
<PRE>
public boolean <B>execute</B>(java.lang.String&nbsp;query)
                throws java.sql.SQLException</PRE>
<DL>
<DD>Executes a SQL query.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>query</CODE> - the SQL query
<DT><B>Returns:</B><DD>true if the query generated results
<DT><B>Throws:</B>
<DD><CODE>java.sql.SQLException</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="getResultSet()"><!-- --></A><H3>
getResultSet</H3>
<PRE>
public java.sql.ResultSet <B>getResultSet</B>()
                                throws java.sql.SQLException</PRE>
<DL>
<DD>Gets the results generated by a previous query.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the result set.
<DT><B>Throws:</B>
<DD><CODE>java.sql.SQLException</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="getUpdateCount()"><!-- --></A><H3>
getUpdateCount</H3>
<PRE>
public int <B>getUpdateCount</B>()
                   throws java.sql.SQLException</PRE>
<DL>
<DD>Dewtermines if the current query retrieves a result set or updates a table
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the update count (-1 if the query retrieves a result set).
<DT><B>Throws:</B>
<DD><CODE>java.sql.SQLException</CODE> - if an error occurs</DL>
</DD>
</DL>
<HR>

<A NAME="tableExists(java.lang.String)"><!-- --></A><H3>
tableExists</H3>
<PRE>
public boolean <B>tableExists</B>(java.lang.String&nbsp;tableName)
                    throws java.lang.Exception</PRE>
<DL>
<DD>Checks that a given table exists.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>tableName</CODE> - the name of the table to look for.
<DT><B>Returns:</B><DD>true if the table exists.
<DT><B>Throws:</B>
<DD><CODE>java.lang.Exception</CODE> - if an error occurs.</DL>
</DD>
</DL>
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