net.sf.saxon.java
Class JavaPlatform

java.lang.Object
  extended by 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


Copyright (c) Saxonica Limited. All rights reserved.