spo.src.JDBC
Class XConnection

java.lang.Object
  |
  +--spo.src.JDBC.XConnection

public class XConnection

extends java.lang.Object

Class XConnection is java class, which allows client to connect to the SPDBMS data server.

Version:

1.0

Author:

Wenzhong Zhao

Field Summary

(package private) static java.lang.String	DEFAULT_HOST
(package private) static int	DEFAULT_PORT

Constructor Summary

XConnection()
Default constructor Initialize the XConnection

Method Summary

void	close() Close the connection to the data server
void	connect() Use default host and port to connect
void	connect(java.lang.String host, int port) Connect to the data server with (host, port)
java.lang.String	create(java.lang.String relName, java.lang.String schemaURL) Create the relation in the data server
java.lang.String	delete(java.lang.String relName, java.lang.String condition) Delete from the relation SPOs which satisfy the condition
java.lang.String	drop(java.lang.String relName) Drop the relation
java.lang.String	getRelNames() Get the names of relations in the data server
java.lang.String	insert(java.lang.String relName, java.lang.String xmlFile) Insert a xml file into the relation
java.lang.String	query(java.lang.String queryStr, boolean isXML) Send a query to the data server

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_HOST

static final java.lang.String DEFAULT_HOST

See Also:

Constant Field Values

DEFAULT_PORT

static final int DEFAULT_PORT

See Also:

Constant Field Values

Constructor Detail

XConnection

public XConnection()

Default constructor Initialize the XConnection

Method Detail

connect

public void connect()

Use default host and port to connect

connect

public void connect(java.lang.String host,
                    int port)

Connect to the data server with (host, port)

Parameters:

host - data server name

port - the prot number which the server is listening

close

public void close()

Close the connection to the data server

getRelNames

public java.lang.String getRelNames()
                             throws java.io.IOException

Get the names of relations in the data server

java.io.IOException

create

public java.lang.String create(java.lang.String relName,
                               java.lang.String schemaURL)
                        throws java.io.IOException

Create the relation in the data server

Parameters:

relName - name of the relation

schemaURL - URL string of the schema

java.io.IOException

drop

public java.lang.String drop(java.lang.String relName)
                      throws java.io.IOException

Drop the relation

Parameters:

relName - name of the relation

java.io.IOException

insert

public java.lang.String insert(java.lang.String relName,
                               java.lang.String xmlFile)
                        throws java.io.IOException

Insert a xml file into the relation

Parameters:

relName - name of the relation

xmlFile - name the xml file

java.io.IOException

delete

public java.lang.String delete(java.lang.String relName,
                               java.lang.String condition)
                        throws java.io.IOException

Delete from the relation SPOs which satisfy the condition

Parameters:

relName - name of the relation

condition - the condition string

java.io.IOException

query

public java.lang.String query(java.lang.String queryStr,
                              boolean isXML)
                       throws java.io.IOException

Send a query to the data server

Parameters:

queryStr - the query string

isXML - set the format of the query result. true will return XML, otherwise HTML

java.io.IOException