edu.ucsb.nceas.metacat
Class DBReader

java.lang.Object
  |
  +--edu.ucsb.nceas.metacat.DBReader

public class DBReader

extends java.lang.Object

A Class that creates an XML text document from a query to a relational DB containing a DOM representation

Inner Class Summary

class

DBReader.DoctypeInfo A utility class that encapsulates document type information

Constructor Summary

DBReader(java.sql.Connection conn)
construct a DBReader instance.

Method Summary

DBReader.DoctypeInfo	getDoctypeInfo(long docid) Look up the document type information from the database
long	getRootNode(long docid) Get the root node id for an XML document given a document id
static void	main(java.lang.String[] args) main routine used for testing.
java.lang.String	readXMLDocument(long docid) Create an XML document from the database starting with the element having element_id nodeid

Methods inherited from class java.lang.Object

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

Constructor Detail

DBReader

public DBReader(java.sql.Connection conn)
         throws java.io.IOException,
                java.sql.SQLException,
                java.lang.ClassNotFoundException

construct a DBReader instance. Generally, one calls readXMLDocument() after constructing the instance

Parameters:

conn - the database connection from which to read the document

Method Detail

main

public static void main(java.lang.String[] args)

main routine used for testing. Usage: java DBReader [dbstring]

Parameters:

nodeid - the id number of the root of the subtree to display

user - the username to use for the database connection

password - the password to use for the database connection

dbstring - the connection info to use for the database connection

getRootNode

public long getRootNode(long docid)

Get the root node id for an XML document given a document id

Parameters:

docid - the document node contains the root of the document

readXMLDocument

public java.lang.String readXMLDocument(long docid)

Create an XML document from the database starting with the element having element_id nodeid

Parameters:

docid - the document that we want retrieved

getDoctypeInfo

public DBReader.DoctypeInfo getDoctypeInfo(long docid)

Look up the document type information from the database

Parameters:

docid - the id of the document to look up