oracle.spatial.util

Class Util

java.lang.Object

oracle.spatial.util.Util

public class Util
extends java.lang.Object

some useful utility routines used by SDOVIS. These are not clearly documented so use at your own risk!! This is internal.

Constructor Summary

Constructors

Constructor and Description
Util()

Method Summary

Modifier and Type	Method and Description
static void	center(java.awt.Component c) Centers an awt component w.r.t.
static java.lang.String	checkSQLName(java.lang.String string, int maxStringLength) Checks for any illegal characters in a SQL name.
static java.sql.Connection	connect(java.lang.String host, java.lang.String sid, java.lang.String port, java.lang.String user, java.lang.String passwd, java.lang.String mode, int rowPref) Establishes an Oracle JDBC connection to the specified database.
static double[]	convert(java.lang.String str) Converts a string of coordinates into a double array.
static java.lang.String	enquoteColumnName(java.sql.Connection conn, java.lang.String columnName) Enquotes a column name.
static java.lang.String	enquoteNameSQLName(java.sql.Connection conn, java.lang.String name) Returns the ENQUOTE_NAME formatted String for the SQL name If the Oracle JDBC is present, use the new OracleStatement.enquoteIdentifier API in the JDK8 JDBC.
static java.lang.String	enquoteTableName(java.sql.Connection conn, java.lang.String tableName) Enquotes a table name with or without schema name which is separated by ".".
static java.lang.String	getConnStr(java.lang.String mode, java.lang.String host, java.lang.String port, java.lang.String sid) connects to the database using supplied information.
static java.lang.String	getDBVersion(java.sql.Connection conn) Gets the version of the database connected.
static java.lang.String	getJDBCDriverVersion(java.sql.Connection conn) Gets the oracle JDBC driver version string.
static java.awt.Shape	getShape(double[] coords, boolean close) converts the coordinate array into a GeneralPath shape.
static boolean	isGeodetic(int srid) Using an Oracle convention to determin if a srid is geodetic.
static boolean	isPre9i(java.sql.Connection conn) Determin if a database is pre-9i version.
static void	main(java.lang.String[] args)
static java.awt.geom.Rectangle2D.Double	mbr(double[] coords)
static java.lang.String	qualifiedSQLName(java.sql.Connection conn, java.lang.String name) Checks if the specified name is a qualified SQL name.
static byte[]	readFile(java.lang.String f)
static java.util.ArrayList	splitBy(java.lang.String str, java.lang.String delim) gets an array list of strings that are separated by delimiters such as commas

Methods inherited from class java.lang.Object

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

Constructor Detail

Util

public Util()

Method Detail

convert

public static double[] convert(java.lang.String str)

Converts a string of coordinates into a double array. The delimiter between the numbers can be white space, comma, semicolon, or CR.

splitBy

public static java.util.ArrayList splitBy(java.lang.String str,
                                          java.lang.String delim)

gets an array list of strings that are separated by delimiters such as commas

Parameters:

str - the input string to be tokenized

delim - the delimiter to be used in tokenizing the string

Returns:

ArrayList of all the tokens

getShape

public static java.awt.Shape getShape(double[] coords,
                                      boolean close)

converts the coordinate array into a GeneralPath shape.

mbr

public static java.awt.geom.Rectangle2D.Double mbr(double[] coords)

readFile

public static byte[] readFile(java.lang.String f)
                       throws java.io.IOException

Throws:

java.io.IOException

connect

public static java.sql.Connection connect(java.lang.String host,
                                          java.lang.String sid,
                                          java.lang.String port,
                                          java.lang.String user,
                                          java.lang.String passwd,
                                          java.lang.String mode,
                                          int rowPref)

Establishes an Oracle JDBC connection to the specified database. If a OCI mode connection is requested but failed, then a "thin" JDBC connection is automatically attempted.

Parameters:

host - name of the host machine where the database runs

sid - instance id of the database

port - which port the database is listening at

user - the database user to connect to

passwd - the database user's password

mode - the connection mode; possible values are "thin", "oci" or "oci8". If null value is supplied the default "oci8" mode is attempted.

rowPref - the row prefetch to be set with the connection. If a value less than or equal to zero is supplied, the defualt value of 32 will be used for this connection.

Returns:

an Oracle JDBC connection if successful, otherwise null.

getJDBCDriverVersion

public static java.lang.String getJDBCDriverVersion(java.sql.Connection conn)

Gets the oracle JDBC driver version string.

getDBVersion

public static java.lang.String getDBVersion(java.sql.Connection conn)

Gets the version of the database connected.

isPre9i

public static boolean isPre9i(java.sql.Connection conn)

Determin if a database is pre-9i version. This is internal.

isGeodetic

public static boolean isGeodetic(int srid)

Using an Oracle convention to determin if a srid is geodetic. This is internal.

getConnStr

public static java.lang.String getConnStr(java.lang.String mode,
                                          java.lang.String host,
                                          java.lang.String port,
                                          java.lang.String sid)

connects to the database using supplied information. If any one of the following parameters are null, then the connection will be made to a (default) local database instance.

   mode, host, port, sid
 

If user requires OCI-mode connection but failed, then a "Thin" mode connection is automatically attempted.

Parameters:

mode - the mode of connection. It could either be a THIN or an OCI connection. THIN is slower but pure java, while OCI is faster but requires Oracle OCI library.

host - the host where the database is located.

port - the port where the database instance listens (default is 1521)

sid - the instance id of the database.

Returns:

a JDBC connection to specified Oracle Database. This is internal.

center

public static void center(java.awt.Component c)

Centers an awt component w.r.t. the screen.

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException,
                        java.lang.Exception,
                        java.sql.SQLException

Throws:

java.io.IOException

java.lang.Exception

java.sql.SQLException

checkSQLName

public static java.lang.String checkSQLName(java.lang.String string,
                                            int maxStringLength)
                                     throws java.sql.SQLException

Checks for any illegal characters in a SQL name. Only alpha-numeric characters and ".", "_","$","#" are allowed.

Parameters:

string - input string

maxStringLength - maximum length for input string

Returns:

string Retruns the string if passes the check

Throws:

java.sql.SQLException - An exception is thrown if the input string contains any illegal characters or exceeds the maximum length

qualifiedSQLName

public static java.lang.String qualifiedSQLName(java.sql.Connection conn,
                                                java.lang.String name)
                                         throws java.sql.SQLException

Checks if the specified name is a qualified SQL name. It calls SYS.DBMS_ASSERT.qualified_sql_name function.

Parameters:

conn - the database connection

name - the input name

Returns:

string Retruns the string if passes the check

Throws:

java.sql.SQLException - A SQLexception is thrown if the dbms_assert.qualified_sql_name failed

enquoteNameSQLName

public static java.lang.String enquoteNameSQLName(java.sql.Connection conn,
                                                  java.lang.String name)
                                           throws java.sql.SQLException

Returns the ENQUOTE_NAME formatted String for the SQL name If the Oracle JDBC is present, use the new OracleStatement.enquoteIdentifier API in the JDK8 JDBC. Otherwise use the DBMS_ASSERT.ENQUOTE_NAME formatted String for the SQL name using "false" for the second parameter (i.e., no capitalization of SQL name). This method is added due to avoid SQL Injection issues.

Parameters:

conn - the database connection

name - the input name

Throws:

java.sql.SQLException

enquoteTableName

public static java.lang.String enquoteTableName(java.sql.Connection conn,
                                                java.lang.String tableName)
                                         throws java.sql.SQLException

Enquotes a table name with or without schema name which is separated by ".". This method also can be used to enquote all column names, including object column names like col.attr1.attr2.attr3 == "COL"."ATTR1"."ATTR2"."ATTR3"

Parameters:

conn -

tableName -

Returns:

String

Throws:

java.sql.SQLException

enquoteColumnName

public static java.lang.String enquoteColumnName(java.sql.Connection conn,
                                                 java.lang.String columnName)
                                          throws java.sql.SQLException

Enquotes a column name.

Parameters:

conn -

columnName -

Returns:

String

Throws:

java.sql.SQLException