Package net.sf.saxon.java

Class JavaPlatform

java.lang.Object

net.sf.saxon.java.JavaPlatform

All Implemented Interfaces:

Platform

Direct Known Subclasses:

JavaPlatformPE

public class JavaPlatform
extends java.lang.Object
implements Platform

Implementation of the Platform class containing methods specific to the Java platform (as distinct from .NET). This is a singleton class with no instance data.

Constructor Summary

Constructors

Constructor	Description
JavaPlatform()	The constructor is called during the static initialization of the Configuration

Method Summary

Modifier and Type	Method	Description
void	addFunctionLibraries(FunctionLibraryList list, Configuration config, int hostLanguage)	Add the platform-specific function libraries to a function library list.
boolean	canReturnCollationKeys(StringCollator collation)	Given a collation, determine whether it is capable of returning collation keys.
RegularExpression	compileRegularExpression(Configuration config, java.lang.CharSequence regex, java.lang.String flags, java.lang.String hostLanguage, java.util.List<java.lang.String> warnings)	Compile a regular expression
AtomicMatchKey	getCollationKey(SimpleCollation namedCollation, java.lang.String value)	Given a collation, get a collation key.
ExternalObjectType	getExternalObjectType(Configuration config, java.lang.String uri, java.lang.String localName)	Get a SchemaType representing a wrapped external (Java or .NET) object
java.lang.String	getInstallationDirectory(java.lang.String edition, Configuration config)	Return the name of the directory in which the software is installed (if available)
javax.xml.transform.Source	getParserSource(PipelineConfiguration pipe, javax.xml.transform.stream.StreamSource input, int validation, boolean dtdValidation)	Convert a StreamSource to either a SAXSource or a PullSource, depending on the native parser of the selected platform
java.lang.String	getPlatformSuffix()	Get a suffix letter to add to the Saxon version number to identify the platform
java.lang.String	getPlatformVersion()	Get the platform version
boolean	hasICUCollator()	No ICU features
boolean	hasICUNumberer()	Indicate whether the ICU library is available and supports Numberers
void	initialize(Configuration config)	Perform platform-specific initialization of the configuration
boolean	isDotNet()	Return true if this is the .NET platform
boolean	isJava()	Return true if this is the Java platform
boolean	JAXPStaticContextCheck(RetainedStaticContext retainedStaticContext, StaticContext sc)	Checks if the supplied static context is an instance of the JAXP static context.
org.xml.sax.XMLReader	loadParser()	Get a parser by instantiating the SAXParserFactory
org.xml.sax.XMLReader	loadParserForXmlFragments()	Get a parser suitable for parsing XML fragments
StringCollator	makeCollation(Configuration config, java.util.Properties props, java.lang.String uri)	Obtain a collation with a given set of properties.
java.lang.ClassLoader	makeGeneratedClassLoader(Configuration config, java.lang.Class thisClass)	Return the class loader required to load the bytecode generated classes
ModuleURIResolver	makeStandardModuleURIResolver(Configuration config)	Make an instance of the default module URI resolver for this platform
StringCollator	makeUcaCollator(java.lang.String uri, Configuration config)	If available, make a collation using the ICU-J Library
void	registerAllBuiltInObjectModels(Configuration config)	Register all the external object models that are provided as standard with the relevant edition of Saxon for this Configuration
void	setDefaultSAXParserFactory(Configuration config)	Set the default XML parser to be loaded by the SAXParserFactory on this platform.

Methods inherited from class java.lang.Object

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

Constructor Detail

JavaPlatform

public JavaPlatform()

The constructor is called during the static initialization of the Configuration

Method Detail

JAXPStaticContextCheck

public boolean JAXPStaticContextCheck(RetainedStaticContext retainedStaticContext,
                                      StaticContext sc)

Checks if the supplied static context is an instance of the JAXP static context. On Java we create namespace information from the JAXP XPath static context. On the .NET platform we do nothing.

Specified by:

JAXPStaticContextCheck in interface Platform

Parameters:

retainedStaticContext -

sc -

Returns:

boolean

Since:

9.7.0.5

initialize

public void initialize(Configuration config)

Perform platform-specific initialization of the configuration

Specified by:

initialize in interface Platform

Parameters:

config - the Saxon Configuration

isJava

public boolean isJava()

Return true if this is the Java platform

Specified by:

isJava in interface Platform

Returns:

true if this is the Java platform

isDotNet

public boolean isDotNet()

Return true if this is the .NET platform

Specified by:

isDotNet in interface Platform

Returns:

true if this is the .NET platform

getPlatformVersion

public java.lang.String getPlatformVersion()

Get the platform version

Specified by:

getPlatformVersion in interface Platform

Returns:

the version of the platform, for example "Java version 1.5.09"

getPlatformSuffix

public java.lang.String getPlatformSuffix()

Get a suffix letter to add to the Saxon version number to identify the platform

Specified by:

getPlatformSuffix in interface Platform

Returns:

"J" for Java, "N" for .NET

loadParser

public org.xml.sax.XMLReader loadParser()

Get a parser by instantiating the SAXParserFactory

Specified by:

loadParser in interface Platform

Returns:

the parser (XMLReader)

loadParserForXmlFragments

public org.xml.sax.XMLReader loadParserForXmlFragments()

Get a parser suitable for parsing XML fragments

For background, see bugs 4127 and 4253. The problem is that to implement parse-xml-fragment(), we need to set an EntityResolver on the returned parser. But if an Apache catalog resolver is in use, the JAXP system properties may be set so that JAXP returns a custom XMLReader supplied by the catalog resolver, and that XMLReader ignores any attempt to set an EntityResolver. So we bypass JAXP and try to load the built-in parser within the JDK, which we know we can trust; only if this fails (presumably because this is not the Oracle JDK) do we fall back to using a JAXP-supplied parser. And if this turns out to ignore setEntityResolver() calls, we're hosed.

Specified by:

loadParserForXmlFragments in interface Platform

Returns:

the parser (XMLReader)

getParserSource

public javax.xml.transform.Source getParserSource(PipelineConfiguration pipe,
                                                  javax.xml.transform.stream.StreamSource input,
                                                  int validation,
                                                  boolean dtdValidation)

Convert a StreamSource to either a SAXSource or a PullSource, depending on the native parser of the selected platform

Specified by:

getParserSource in interface Platform

Parameters:

pipe - the pipeline configuration

input - the supplied StreamSource

validation - indicates whether schema validation is required

dtdValidation - indicates whether DTD validation is required

Returns:

the PullSource or SAXSource, initialized with a suitable parser, or the original input Source, if now special handling is required or possible. This implementation always returns the original input unchanged.

makeCollation

public StringCollator makeCollation(Configuration config,
                                    java.util.Properties props,
                                    java.lang.String uri)
                             throws XPathException

Obtain a collation with a given set of properties. The set of properties is extensible and variable across platforms. Common properties with example values include lang=ed-GB, strength=primary, case-order=upper-first, ignore-modifiers=yes, alphanumeric=yes. Properties that are not supported are generally ignored; however some errors, such as failing to load a requested class, are fatal.

Specified by:

makeCollation in interface Platform

Parameters:

config - the configuration object

props - the desired properties of the collation

uri - the collation URI

Returns:

a collation with these properties

Throws:

XPathException - if a fatal error occurs

canReturnCollationKeys

public boolean canReturnCollationKeys(StringCollator collation)

Given a collation, determine whether it is capable of returning collation keys. The essential property of collation keys is that if two values are equal under the collation, then the collation keys are equal under the equals() method.

Specified by:

canReturnCollationKeys in interface Platform

Parameters:

collation - the collation, provided as a Comparator

Returns:

true if this collation can supply collation keys

getCollationKey

public AtomicMatchKey getCollationKey(SimpleCollation namedCollation,
                                      java.lang.String value)

Given a collation, get a collation key. The essential property of collation keys is that if two values are equal under the collation, then the collation keys are compare correctly under the equals() method.

Specified by:

getCollationKey in interface Platform

Parameters:

namedCollation - the collation in use

value - the string whose collation key is required

Returns:

a representation of the collation key, such that two collation keys are equal() if and only if the string values they represent are equal under the specified collation.

Throws:

java.lang.ClassCastException - if the collation is not one that is capable of supplying collation keys (this should have been checked in advance)

hasICUCollator

public boolean hasICUCollator()

No ICU features

Specified by:

hasICUCollator in interface Platform

Returns:

true if the ICU library class for collations appears to be loaded

hasICUNumberer

public boolean hasICUNumberer()

Description copied from interface: Platform

Indicate whether the ICU library is available and supports Numberers

Specified by:

hasICUNumberer in interface Platform

Returns:

true if the ICU library class for rule-based numbering appears to be loaded

makeUcaCollator

public StringCollator makeUcaCollator(java.lang.String uri,
                                      Configuration config)
                               throws XPathException

If available, make a collation using the ICU-J Library

Specified by:

makeUcaCollator in interface Platform

Parameters:

uri - the collation URI (which will always be a UCA collation URI as defined in XSLT 3.0)

config - the Saxon configuration

Returns:

the collation, or null if not available

Throws:

XPathException - if the URI is malformed in some way

compileRegularExpression

public RegularExpression compileRegularExpression(Configuration config,
                                                  java.lang.CharSequence regex,
                                                  java.lang.String flags,
                                                  java.lang.String hostLanguage,
                                                  java.util.List<java.lang.String> warnings)
                                           throws XPathException

Compile a regular expression

Specified by:

compileRegularExpression in interface Platform

Parameters:

config - the Saxon configuration

regex - the regular expression as a string

flags - the value of the flags attribute

hostLanguage - one of "XSD10", "XSD11", "XP20" or "XP30". Also allow combinations, e.g. "XP20/XSD11".

warnings - if supplied, may capture warnings from the regular expression compiler

Returns:

the compiled regular expression

Throws:

XPathException - if the regular expression or the flags are invalid

addFunctionLibraries

public void addFunctionLibraries(FunctionLibraryList list,
                                 Configuration config,
                                 int hostLanguage)

Add the platform-specific function libraries to a function library list. This version of the method does nothing

Parameters:

list - the function library list that is to be extended

config - the Configuration

hostLanguage - the host language, for example Configuration.XQUERY

getExternalObjectType

public ExternalObjectType getExternalObjectType(Configuration config,
                                                java.lang.String uri,
                                                java.lang.String localName)

Description copied from interface: Platform

Get a SchemaType representing a wrapped external (Java or .NET) object

Specified by:

getExternalObjectType in interface Platform

Parameters:

config - the Saxon Configuration

uri - the namespace URI of the schema type

localName - the local name of the schema type

Returns:

the SchemaType object representing this type

getInstallationDirectory

public java.lang.String getInstallationDirectory(java.lang.String edition,
                                                 Configuration config)

Return the name of the directory in which the software is installed (if available)

Specified by:

getInstallationDirectory in interface Platform

Parameters:

edition - The edition of the software that is loaded ("HE", "PE", or "EE")

config - the Saxon configuration

Returns:

the name of the directory in which Saxon is installed, if available, or null otherwise

registerAllBuiltInObjectModels

public void registerAllBuiltInObjectModels(Configuration config)

Register all the external object models that are provided as standard with the relevant edition of Saxon for this Configuration

Specified by:

registerAllBuiltInObjectModels in interface Platform

Parameters:

config - the Saxon configuration

Since:

9.3

setDefaultSAXParserFactory

public void setDefaultSAXParserFactory(Configuration config)

Set the default XML parser to be loaded by the SAXParserFactory on this platform. Needed because the Apache catalog resolver uses the SAXParserFactory to instantiate a parser, and if not customized this causes a failure on the .NET platform.

Specified by:

setDefaultSAXParserFactory in interface Platform

Parameters:

config - the Saxon configuration

Since:

9.4

makeStandardModuleURIResolver

public ModuleURIResolver makeStandardModuleURIResolver(Configuration config)

Description copied from interface: Platform

Make an instance of the default module URI resolver for this platform

Specified by:

makeStandardModuleURIResolver in interface Platform

Parameters:

config - the Saxon configuration

Returns:

an instance of ModuleURIResolver

makeGeneratedClassLoader

public java.lang.ClassLoader makeGeneratedClassLoader(Configuration config,
                                                      java.lang.Class thisClass)

Return the class loader required to load the bytecode generated classes

Specified by:

makeGeneratedClassLoader in interface Platform

Parameters:

config - The saxon configuration

thisClass - The class object generated

Returns:

the class loader object

Since:

9.6.0.3