net.sf.saxon.java
Class JavaPlatform

java.lang.Object
  net.sf.saxon.java.JavaPlatform

All Implemented Interfaces:

Serializable, Platform

Direct Known Subclasses:

JavaPlatformPE

public class JavaPlatform
extends 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.

See Also:

Serialized Form

Constructor Summary

JavaPlatform()
The constructor is called during the static initialization of the Configuration, by virtue of the class name appearing in the edition.properties file within the issued JAR file

Method Summary

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.
Object	getCollationKey(NamedCollation namedCollation, String value) Given a collation, get a collation key.
SchemaType	getExternalObjectType(Configuration config, String uri, String localName) Get a SchemaType representing a wrapped external (Java or .NET) object
Source	getParserSource(PipelineConfiguration pipe, StreamSource input, int validation, boolean dtdValidation, int stripspace) Convert a StreamSource to either a SAXSource or a PullSource, depending on the native parser of the selected platform
String	getPlatformSuffix() Get a suffix letter to add to the Saxon version number to identify the platform
String	getPlatformVersion() Get the platform version
String	getVerifierClassName() Get the verifier appropriate to the platform
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
XMLReader	loadParser() Get a parser by instantiating the SAXParserFactory
StringCollator	makeCollation(Configuration config, Properties props, String uri) Obtain a collation with a given set of properties.

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, by virtue of the class name appearing in the edition.properties file within the issued JAR file

Method Detail

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

getVerifierClassName

public String getVerifierClassName()

Get the verifier appropriate to the platform

Specified by:

getVerifierClassName in interface Platform

getPlatformVersion

public 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 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 XMLReader loadParser()

Get a parser by instantiating the SAXParserFactory

Specified by:

loadParser in interface Platform

Returns:

the parser (XMLReader)

getParserSource

public Source getParserSource(PipelineConfiguration pipe,
                              StreamSource input,
                              int validation,
                              boolean dtdValidation,
                              int stripspace)

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

stripspace - indicates whether whitespace text nodes should be stripped

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,
                                    Properties props,
                                    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 Object getCollationKey(NamedCollation namedCollation,
                              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:

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

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 SchemaType getExternalObjectType(Configuration config,
                                        String uri,
                                        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