org.pentaho.platform.util.xml

Class XmlHelper

java.lang.Object

org.pentaho.platform.util.xml.XmlHelper

public class XmlHelper
extends Object

A set of static methods for performing various operations on DOM Documents and XML text (in the form of streams, Strings, and files). The operations include creating DOM Documents (dom4j) transforming DOM Documents creating XML from Objects, Lists and Maps creating Lists or Maps from XML getting an XML node's text

Author:

mbatchel/jdixon

Constructor Summary

Constructors

Constructor and Description
XmlHelper()

Method Summary

Modifier and Type	Method and Description
static String	createXmlProcessingInstruction(String version, String encoding)
static String	decode(String string)
static void	decode(String[] strings)
static String	encode(String string)
static void	encode(String[] strings)
static String	getEncoding(File f)
static String	getEncoding(InputStream inStream)
static String	getEncoding(String xml) Find the character encoding specification in the xml String.
static String	getEncoding(String xml, String defaultEncoding) Find the character encoding specification in the xml String.
static InputStream	getLocalizedFile(String fullPath, Locale locale, IDocumentResourceLoader loader)
static InputStream	getLocalizedXsl(String path, String xslName, IDocumentResourceLoader loader) Get the File object corresponding to the path, filename (xslName), and locale.
static String	listToXML(List l)
static String	listToXML(List l, String indent)
static String	mapToXML(Map m)
static String	mapToXML(Map mp, String indent)
static String	readEncodingProcessingInstruction(InputStream inStream) WARNING: if the inStream instance does not support mark/reset, when this method returns, subsequent reads on inStream will be 256 bytes into the stream.
static StringBuffer	transformXml(InputStream xslInStream, InputStream docInStrm, Map params, URIResolver resolver) Use the transform specified by xslSrc and transform the document specified by docSrc, and return the resulting document.
protected static StringBuffer	transformXml(StreamSource xslSrc, StreamSource docSrc, Map params, URIResolver resolver) Use the transform specified by xslSrc and transform the document specified by docSrc, and return the resulting document.
static StringBuffer	transformXml(String xslName, String xslPath, InputStream docInStrm, Map params, IDocumentResourceLoader loader) Use the transform specified by xslPath and xslName and transform the document specified by docInStrm, and return the resulting document.
static StringBuffer	transformXml(String xslName, String xslPath, String strDocument, Map params, IDocumentResourceLoader loader) Use the transform specified by xslName and transform the document specified by docInStrm, and return the resulting document.

Methods inherited from class java.lang.Object

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

Constructor Detail

XmlHelper

public XmlHelper()

Method Detail

listToXML

public static String listToXML(List l)
                        throws UnsupportedOperationException

Throws:

UnsupportedOperationException

listToXML

public static String listToXML(List l,
                               String indent)
                        throws UnsupportedOperationException

Throws:

UnsupportedOperationException

mapToXML

public static String mapToXML(Map m)
                       throws UnsupportedOperationException

Throws:

UnsupportedOperationException

mapToXML

public static String mapToXML(Map mp,
                              String indent)
                       throws UnsupportedOperationException

Throws:

UnsupportedOperationException

decode

public static void decode(String[] strings)

decode

public static String decode(String string)

encode

public static void encode(String[] strings)

encode

public static String encode(String string)

getEncoding

public static String getEncoding(File f)
                          throws IOException

Throws:

IOException

getEncoding

public static String getEncoding(InputStream inStream)
                          throws IOException

Throws:

IOException

getEncoding

public static String getEncoding(String xml)

Find the character encoding specification in the xml String. If it exists, return the character encoding. Otherwise, return null.

Parameters:

xml - String containing the xml

Returns:

String containing the character encoding in the xml processing instruction if it exists, else null.

getEncoding

public static String getEncoding(String xml,
                                 String defaultEncoding)

Find the character encoding specification in the xml String. If it exists, return the character encoding. Otherwise, return the system encoding.

Parameters:

xml - String containing the xml

defaultEncoding - Encoding to use if there is no encoding in the xml document

Returns:

String containing the character encoding in the xml processing instruction, or defaultEncoding if there is no encoding in the xml document. If defaultEncoding is also null, then it returns the value in LocaleHelper.getSystemEncoding(). if it exists, else the system encoding.

readEncodingProcessingInstruction

public static String readEncodingProcessingInstruction(InputStream inStream)
                                                throws IOException

WARNING: if the inStream instance does not support mark/reset, when this method returns, subsequent reads on inStream will be 256 bytes into the stream. This may not be the expected behavior. FileInputStreams are an example of an InputStream that does not support mark/reset. InputStreams that do support mark/reset will be reset to the beginning of the stream when this method returns.

Parameters:

inStream -

Returns:

Throws:

IOException

transformXml

public static final StringBuffer transformXml(String xslName,
                                              String xslPath,
                                              String strDocument,
                                              Map params,
                                              IDocumentResourceLoader loader)
                                       throws TransformerException

Use the transform specified by xslName and transform the document specified by docInStrm, and return the resulting document.

Parameters:

xslName - String containing the name of a file in the repository containing the xsl transform

xslPath - String containing the path to the file identifyied by xslName

uri - String containing the URI of a resource containing the document to be transformed

params - Map of properties to set on the transform

session - IPentahoSession containing a URIResolver instance to resolve URI's in the output document.

Returns:

StringBuffer containing the XML results of the transform. Null if there was an error.

Throws:

TransformerException - If attempt to transform the document fails.

transformXml

public static final StringBuffer transformXml(String xslName,
                                              String xslPath,
                                              InputStream docInStrm,
                                              Map params,
                                              IDocumentResourceLoader loader)
                                       throws TransformerException

Use the transform specified by xslPath and xslName and transform the document specified by docInStrm, and return the resulting document.

Parameters:

xslSrc - StreamSrc containing the xsl transform

docSrc - StreamSrc containing the document to be transformed

params - Map of properties to set on the transform

session - IPentahoSession containing a URIResolver instance to resolve URI's in the output document.

Returns:

StringBuffer containing the XML results of the transform. Null if there was an error.

Throws:

TransformerException - If attempt to transform the document fails.

transformXml

public static final StringBuffer transformXml(InputStream xslInStream,
                                              InputStream docInStrm,
                                              Map params,
                                              URIResolver resolver)
                                       throws TransformerConfigurationException,
                                              TransformerException

Use the transform specified by xslSrc and transform the document specified by docSrc, and return the resulting document.

Parameters:

xslInStream - InputStream containing the xsl transform

docInStrm - InputStream containing the document to be transformed

params - Map of properties to set on the transform

resolver - URIResolver instance to resolve URI's in the output document.

Returns:

StringBuffer containing the XML results of the transform

Throws:

TransformerConfigurationException - if the TransformerFactory fails to create a Transformer.

TransformerException - if actual transform fails.

transformXml

protected static final StringBuffer transformXml(StreamSource xslSrc,
                                                 StreamSource docSrc,
                                                 Map params,
                                                 URIResolver resolver)
                                          throws TransformerConfigurationException,
                                                 TransformerException

Use the transform specified by xslSrc and transform the document specified by docSrc, and return the resulting document.

Parameters:

xslSrc - StreamSrc containing the xsl transform

docSrc - StreamSrc containing the document to be transformed

params - Map of properties to set on the transform

resolver - URIResolver instance to resolve URI's in the output document.

Returns:

StringBuffer containing the XML results of the transform

Throws:

TransformerConfigurationException - if the TransformerFactory fails to create a Transformer.

TransformerException - if actual transform fails.

getLocalizedXsl

public static final InputStream getLocalizedXsl(String path,
                                                String xslName,
                                                IDocumentResourceLoader loader)

Get the File object corresponding to the path, filename (xslName), and locale. The path is relative to the solution path.

Parameters:

path -

xslName -

Returns:

getLocalizedFile

public static InputStream getLocalizedFile(String fullPath,
                                           Locale locale,
                                           IDocumentResourceLoader loader)

createXmlProcessingInstruction

public static String createXmlProcessingInstruction(String version,
                                                    String encoding)

Parameters:

version -

encoding -

Returns:

String Xml Processing instruction text with the specified version (usually 1.0) and encoding (for instance, UTF-8)