org.gcube.common.searchservice.searchlibrary.resultset.helpers

Class RSXMLHelper

java.lang.Object

org.gcube.common.searchservice.searchlibrary.resultset.helpers.RSXMLHelper

public class RSXMLHelper
extends Object

Helper class used by ResultSet to create and manipulate xml files / content

Author:

UoA

Constructor Summary

Constructors

Constructor and Description
RSXMLHelper()

Method Summary

Methods

Modifier and Type	Method and Description
static Document	addCustomProperty(Document dom, PropertyElementBase prop) Adds the provided property to the respective placeholder in the provided DOM representation of the head part
static void	createHead(String filename, String next, String[] properties, boolean dataFlow) Creates an XML representation of a ResultSet head part and persists it to storage
static void	createHead(String filename, String next, String[] properties, boolean dataFlow, int access, boolean forward, Date date, String pkey, String encryptedkey, String allprops) Creates an XML representation of a ResultSet head part and persists it to storage
static void	createHead(String filename, String next, String properties, boolean dataFlow) Creates an XML representation of a ResultSet head part and persists it to storage
static String	executeQueryOnDocument(Document dom, String xPath) Evaluates the provided xPath and returns a serialization of the results
static boolean	executeQueryOnResults(String result, String xPath) Perofmors the provided xPath expression on the serialized xml string provided.
static Vector<Integer>	executeQueryOnResultsFile(String filename, String xPath) evaluates the provided xPath expression against the content of the provided file and returns the indexes of the results that the evaluation returned results
static int	getAccess(Document dom) Returns whether or not the RS is populated with results access
static boolean	getDataFlow(Document dom) Returns whether or not the RS is populated with results on demand
static Document	getDocument(String filename) Retrieves the DOM object parsing the content of the provided file
static String	getEncKey(Document dom) Get the encryption key
static Date	getExpireDate(Document dom) Returns whether or not the RS is populated with results forward
static boolean	getForward(Document dom) Returns whether or not the RS is populated with results forward
static String	getLink(Document dom, String which) Retrieves the previous or nect link the provided document has
static Vector<String>	getProperties(Document dom, String type) Retrives the properties with the specified type from the DOM object representing a head part
static String	getPublicKey(Document dom) Get the public key
static void	persistDocument(Document dom, String filename) Persists the provided DOM object in a file wholse filename is provided
static String	retrieveCustomProperties(Document dom) Retrives the serialized version of the CustomPropertied that are contained in the Head part DOM object
static Document	setExpireDate(Document dom, Date date) Returns if the RS is populated with results forward
static Document	setForward(Document dom, boolean forward) Set forward only access to this RS
static void	transform(String xslt, String source, String target) Performs a xslt transformation to the input file and dumpt the out put to a new file
static void	transform(Templates xslt, String source, String target) Performs a xslt transformation to the input file and dumpt the out put to a new file
static Document	updateAccessCounter(Document dom, int newaccess) Adds the provided property to the respective place holder in the provided DOM representation of the head part
static void	updateProperties(String headName, String serializedProps) Overrides existing custom properties and updates them
static void	updateProperties(String headName, String[] properties) Overrides existing custom properties and updates them

Methods inherited from class java.lang.Object

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

Constructor Detail

RSXMLHelper

public RSXMLHelper()

Method Detail

createHead

public static void createHead(String filename,
              String next,
              String[] properties,
              boolean dataFlow)
                       throws Exception

Creates an XML representation of a ResultSet head part and persists it to storage

Parameters:

filename - The name of the file that must be created to store the created head part

next - The name of the file that will hold the next header in the chain

properties - The properties the head should have

dataFlow - Whether or not the RS supports on demand production or results

Throws:

Exception - An unrecoverable for the operation error occured

createHead

public static void createHead(String filename,
              String next,
              String[] properties,
              boolean dataFlow,
              int access,
              boolean forward,
              Date date,
              String pkey,
              String encryptedkey,
              String allprops)
                       throws Exception

Creates an XML representation of a ResultSet head part and persists it to storage

Parameters:

filename - The name of the file that must be created to store the created head part

next - The name of the file that will hold the next header in the chain

properties - The properties the head should have

dataFlow - Whether or not the RS supports on demand production or results

access - access leasing

forward - is forward only property enabled?

date - time leasing

pkey - private key

encryptedkey - encrypted key

allprops - all properties in a string

Throws:

Exception - An unrecoverable for the operation error occurred

createHead

public static void createHead(String filename,
              String next,
              String properties,
              boolean dataFlow)
                       throws Exception

Creates an XML representation of a ResultSet head part and persists it to storage

Parameters:

filename - The name of the file that must be created to store the created head part

next - The name of the file that will hold the next header in the chain

properties - The serialized properties the head should have

dataFlow - Whether or not the RS supports on demand production or results

Throws:

Exception - An unrecoverable for the operation error occured

updateProperties

public static void updateProperties(String headName,
                    String[] properties)
                             throws Exception

Overrides existing custom properties and updates them

Parameters:

headName - the name of the head file

properties - the properties

Throws:

Exception - An unrecoverable for the operation error occured

updateProperties

public static void updateProperties(String headName,
                    String serializedProps)
                             throws Exception

Overrides existing custom properties and updates them

Parameters:

headName - the name of the head file

serializedProps - the serialized properties

Throws:

Exception - An unrecoverable for the operation error occured

persistDocument

public static void persistDocument(Document dom,
                   String filename)
                            throws Exception

Persists the provided DOM object in a file wholse filename is provided

Parameters:

dom - The DOM object to persist

filename - The filename to place the serialization in

Throws:

Exception - An unrecoverable for the operation error occured

getDocument

public static Document getDocument(String filename)
                            throws Exception

Retrieves the DOM object parsing the content of the provided file

Parameters:

filename - The file name to parse

Returns:

The created DOM object

Throws:

Exception - An unrecoverable for the operation error occured

addCustomProperty

public static Document addCustomProperty(Document dom,
                         PropertyElementBase prop)
                                  throws Exception

Adds the provided property to the respective placeholder in the provided DOM representation of the head part

Parameters:

dom - The DOM object representing the head part

prop - The property to add

Returns:

The updated DOM object

Throws:

Exception - An unrecoverable for the operation error occured

updateAccessCounter

public static Document updateAccessCounter(Document dom,
                           int newaccess)
                                    throws Exception

Adds the provided property to the respective place holder in the provided DOM representation of the head part

Parameters:

dom - The DOM object representing the head part

newaccess - The property to add

Returns:

The updated DOM object

Throws:

Exception - An unrecoverable for the operation error occurred

getProperties

public static Vector<String> getProperties(Document dom,
                           String type)
                                    throws Exception

Retrives the properties with the specified type from the DOM object representing a head part

Parameters:

dom - The DOM object containing the Head content

type - The type of properties to retrieve

Returns:

The retrieved properties

Throws:

Exception - An unrecoverable for the operation error occured

getLink

public static String getLink(Document dom,
             String which)
                      throws Exception

Retrieves the previous or nect link the provided document has

Parameters:

dom - The document to retrieve the document from

which - RSConstants.nextLink or RSConstants.previousLink

Returns:

The value of the requested link

Throws:

Exception - The link value could not be retrieved

getDataFlow

public static boolean getDataFlow(Document dom)
                           throws Exception

Returns whether or not the RS is populated with results on demand

Parameters:

dom - The document to retrieve the document from

Returns:

true if the results are proiduced on demand,false otherwise

Throws:

Exception - The link value could not be retrieved

getAccess

public static int getAccess(Document dom)
                     throws Exception

Returns whether or not the RS is populated with results access

Parameters:

dom - The document to retrieve the document from

Returns:

int access window

Throws:

Exception - The link value could not be retrieved

retrieveCustomProperties

public static String retrieveCustomProperties(Document dom)
                                       throws Exception

Retrives the serialized version of the CustomPropertied that are contained in the Head part DOM object

Parameters:

dom - The DOM object containing the head part

Returns:

The serialized properties

Throws:

Exception - An unrecoverable for the operation error occured

executeQueryOnDocument

public static String executeQueryOnDocument(Document dom,
                            String xPath)
                                     throws Exception

Evaluates the provided xPath and returns a serialization of the results

Parameters:

dom - The document to use

xPath - The xPath to be evaluated

Returns:

the retrieved serialization

Throws:

Exception - An unrecoverable for the operation error occured

executeQueryOnResults

public static boolean executeQueryOnResults(String result,
                            String xPath)
                                     throws Exception

Perofmors the provided xPath expression on the serialized xml string provided.

Parameters:

result - The xml serialization to evaluate the expression against

xPath - The expression to be avaluated

Returns:

true if the evaluation returned result, false otherwise

Throws:

Exception - An unrecoverable for the operation error occured

executeQueryOnResultsFile

public static Vector<Integer> executeQueryOnResultsFile(String filename,
                                        String xPath)
                                                 throws Exception

evaluates the provided xPath expression against the content of the provided file and returns the indexes of the results that the evaluation returned results

Parameters:

filename - The file whose results must be iterated over

xPath - The xpath expression

Returns:

The indexes of the records that produced output during evaluation

Throws:

Exception - An unrecoverable for the operation error occured

transform

public static void transform(String xslt,
             String source,
             String target)
                      throws Exception

Performs a xslt transformation to the input file and dumpt the out put to a new file

Parameters:

xslt - The XSLT transformation to apply

source - The source file to transform

target - The target file to place the output

Throws:

Exception - An unrecoverable for the operation error has occured

transform

public static void transform(Templates xslt,
             String source,
             String target)
                      throws Exception

Performs a xslt transformation to the input file and dumpt the out put to a new file

Parameters:

xslt - The XSLT transformation to apply

source - The source file to transform

target - The target file to place the output

Throws:

Exception - An unrecoverable for the operation error has occured

getForward

public static boolean getForward(Document dom)
                          throws Exception

Returns whether or not the RS is populated with results forward

Parameters:

dom - The document to retrieve the document from

Returns:

boolean boolean window

Throws:

Exception - The value could not be retrieved

setForward

public static Document setForward(Document dom,
                  boolean forward)
                           throws Exception

Set forward only access to this RS

Parameters:

dom - the dom of the header

forward - the flag to set for forward

Returns:

The header in a Document

Throws:

Exception - Something went wrong

getExpireDate

public static Date getExpireDate(Document dom)
                          throws Exception

Returns whether or not the RS is populated with results forward

Parameters:

dom - The document to retrieve the document from

Returns:

boolean boolean window

Throws:

Exception - The value could not be retrieved

setExpireDate

public static Document setExpireDate(Document dom,
                     Date date)
                              throws Exception

Returns if the RS is populated with results forward

Parameters:

dom - The document to retrieve the document from

date - the expire date

Returns:

the header in a document

Throws:

Exception - The value could not be retrieved

getEncKey

public static String getEncKey(Document dom)
                        throws Exception

Get the encryption key

Parameters:

dom - The document to retrieve the document from

Returns:

the encrypted key

Throws:

Exception - An error occurred

getPublicKey

public static String getPublicKey(Document dom)
                           throws Exception

Get the public key

Parameters:

dom - The document to retrieve the document from

Returns:

the key

Throws:

Exception - An error occurred