Package edu.ucsb.nceas.metacat

Class DBTransform

java.lang.Object

edu.ucsb.nceas.metacat.DBTransform

public class DBTransform
extends Object

A Class that transforms XML documents utitlizing XSL style sheets Building a transformer from the .xsl is expensive, so Templates are used as an intermediate construct to allow lightweight construction of Transformers. (Transformers themselves are not thread safe, so can't be reused)

Constructor Summary

Constructors

Constructor	Description
DBTransform()	construct a DBTransform instance.

Method Summary

Modifier and Type	Method	Description
protected void	doTransform(StreamSource xml, StreamResult resultOutput, Transformer transformer, Hashtable<String,String[]> param, String qformat, String sessionid)	Reads skin's config file if it exists, and populates Transformer paramaters with its contents.
static NodeList	getPathContent(File f, String path)	gets the content of a tag in a given xml file with the given path
protected static Transformer	getTransformer(String xslSystemId)	The method that manages the Templates Map instances that will be used to build transformers from.
static void	setForceRebuild(boolean forceBuild)	Set the field of forceRebuild
void	transformXMLDocument(String doc, String sourceType, String targetType, String qformat, Writer w, Hashtable<String,String[]> param, String sessionid)	Transform an XML document using the stylesheet reference from the db

Methods inherited from class java.lang.Object

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

Constructor Details

DBTransform

public DBTransform()
            throws IOException,
SQLException,
ClassNotFoundException,
edu.ucsb.nceas.utilities.PropertyNotFoundException

construct a DBTransform instance. Generally, one calls transformXMLDocument() after constructing the instance

Parameters:

conn - the database connection from which to lookup the public ids

Throws:

IOException

SQLException

ClassNotFoundException

edu.ucsb.nceas.utilities.PropertyNotFoundException

Method Details

getTransformer

protected static Transformer getTransformer(String xslSystemId)
                                     throws TransformerConfigurationException

The method that manages the Templates Map instances that will be used to build transformers from.

Parameters:

xslSystemId - - the URL for the stylesheet

forceRebuild - - if true, forces reload of the stylesheet from the system, else use the existing one, if there

Returns:

Throws:

TransformerConfigurationException

transformXMLDocument

public void transformXMLDocument(String doc,
 String sourceType,
 String targetType,
 String qformat,
 Writer w,
 Hashtable<String,String[]> param,
 String sessionid)

Transform an XML document using the stylesheet reference from the db

Parameters:

doc - the document to be transformed

sourcetype - the document type of the source

targettype - the target document type

qformat - the name of the style set to use

pw - the PrintWriter to which output is printed

params - some parameters for eml2 transformation

doTransform

protected void doTransform(StreamSource xml,
 StreamResult resultOutput,
 Transformer transformer,
 Hashtable<String,String[]> param,
 String qformat,
 String sessionid)
                    throws edu.ucsb.nceas.utilities.PropertyNotFoundException,
TransformerException

Reads skin's config file if it exists, and populates Transformer paramaters with its contents. It then adds the parameters passed to it via Hashtable param to the Transformer. It then calls the Transformer.transform method.

Throws:

edu.ucsb.nceas.utilities.PropertyNotFoundException

TransformerException

getPathContent

public static NodeList getPathContent(File f,
 String path)

gets the content of a tag in a given xml file with the given path

Parameters:

f - the file to parse

path - the path to get the content from

setForceRebuild

public static void setForceRebuild(boolean forceBuild)

Set the field of forceRebuild

Parameters:

forceRebuild -