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An OSGi bundle for Saxon-HE
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2013 Saxonica Limited.
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
package net.sf.saxon.java;
import net.sf.saxon.Configuration;
import net.sf.saxon.Platform;
import net.sf.saxon.dom.DOMEnvelope;
import net.sf.saxon.dom.DOMObjectModel;
import net.sf.saxon.event.PipelineConfiguration;
import net.sf.saxon.expr.sort.CodepointCollator;
import net.sf.saxon.expr.sort.SimpleCollation;
import net.sf.saxon.functions.FunctionLibraryList;
import net.sf.saxon.lib.StandardCollectionURIResolver;
import net.sf.saxon.regex.RegularExpression;
import net.sf.saxon.lib.StringCollator;
import net.sf.saxon.regex.ARegularExpression;
import net.sf.saxon.regex.JavaRegularExpression;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.SchemaType;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.transform.Source;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.stream.StreamSource;
import java.text.Collator;
import java.util.List;
import java.util.Properties;
/**
* 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.
*/
public class JavaPlatform implements Platform {
/**
* The constructor is called during the static initialization of the Configuration
*/
public JavaPlatform() {}
/**
* Perform platform-specific initialization of the configuration
*/
public void initialize(Configuration config) {
config.registerExternalObjectModel(DOMEnvelope.getInstance());
config.registerExternalObjectModel(DOMObjectModel.getInstance());
config.setCollectionURIResolver(new StandardCollectionURIResolver());
}
/**
* Return true if this is the Java platform
*/
public boolean isJava() {
return true;
}
/**
* Return true if this is the .NET platform
*/
public boolean isDotNet() {
return false;
}
/**
* Get the platform version
*/
public String getPlatformVersion() {
return "Java version " + System.getProperty("java.version");
}
/**
* Get a suffix letter to add to the Saxon version number to identify the platform
*/
public String getPlatformSuffix() {
return "J";
}
/**
* Get a parser by instantiating the SAXParserFactory
*
* @return the parser (XMLReader)
*/
public XMLReader loadParser() {
XMLReader parser;
try {
parser = SAXParserFactory.newInstance().newSAXParser().getXMLReader();
} catch (ParserConfigurationException err) {
throw new TransformerFactoryConfigurationError(err);
} catch (SAXException err) {
throw new TransformerFactoryConfigurationError(err);
}
return parser;
}
/**
* Convert a StreamSource to either a SAXSource or a PullSource, depending on the native
* parser of the selected platform
*
* @param pipe the pipeline configuration
* @param input the supplied StreamSource
* @param validation indicates whether schema validation is required
* @param dtdValidation indicates whether DTD validation is required
* @param stripspace indicates whether whitespace text nodes should be stripped
* @return 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.
*/
public Source getParserSource(PipelineConfiguration pipe, StreamSource input, int validation,
boolean dtdValidation, int stripspace) {
return input;
}
/**
* 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.
* @param config the configuration object
* @param props the desired properties of the collation
* @param uri the collation URI
* @return a collation with these properties
* @throws XPathException if a fatal error occurs
*/
/*@Nullable*/ public StringCollator makeCollation(Configuration config, Properties props, String uri) throws XPathException {
return JavaCollationFactory.makeCollation(config, uri, props);
}
/**
* 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.
*
* @param collation the collation, provided as a Comparator
* @return true if this collation can supply collation keys
*/
public boolean canReturnCollationKeys(StringCollator collation) {
return (collation instanceof CodepointCollator) ||
((collation instanceof SimpleCollation) &&
(((SimpleCollation)collation).getCollation() instanceof Collator));
}
/**
* 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.
*
* @throws ClassCastException if the collation is not one that is capable of supplying
* collation keys (this should have been checked in advance)
*/
public Object getCollationKey(SimpleCollation namedCollation, String value) {
return ((Collator)namedCollation.getCollation()).getCollationKey(value);
}
/**
* Compile a regular expression
*
*
* @param regex the regular expression as a string
* @param flags the value of the flags attribute
* @param hostLanguage one of "XSD10", "XSD11", "XP20" or "XP30"
* @param warnings
* @return the compiled regular expression
* @throws net.sf.saxon.trans.XPathException
* if the regular expression or the flags are invalid
*/
public RegularExpression compileRegularExpression(CharSequence regex, String flags, String hostLanguage, List warnings) throws XPathException {
// recognize "!" as the last flag to mean: use native Java regex syntax
if (flags.endsWith("!")) {
return new JavaRegularExpression(regex, flags.substring(0, flags.length()-1));
} else {
return new ARegularExpression(regex, flags, hostLanguage, warnings);
}
}
/**
* Add the platform-specific function libraries to a function library list. This version
* of the method does nothing
* @param list the function library list that is to be extended
* @param config the Configuration
* @param hostLanguage the host language, for example Configuration.XQUERY
*/
public void addFunctionLibraries(FunctionLibraryList list, Configuration config, int hostLanguage) {
// do nothing
}
public SchemaType getExternalObjectType(Configuration config, String uri, String localName) {
throw new UnsupportedOperationException("getExternalObjectType for Java");
}
/**
* Return the name of the directory in which the software is installed (if available)
* @return the name of the directory in which Saxon is installed, if available, or null otherwise
* @param edition
*/
public String getInstallationDirectory(String edition, Configuration config) {
return System.getenv("SAXON_HOME");
}
/**
* Register all the external object models that are provided as standard
* with the relevant edition of Saxon for this Configuration
*
* @since 9.3
*/
public void registerAllBuiltInObjectModels(Configuration config) {
// No action for Saxon-HE
}
/**
* 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.
*
* @since 9.4
*/
public void setDefaultSAXParserFactory(){
// No action for Saxon on Java
}
public ClassLoader getClassLoaderForGeneratedClass(final String definedClassName, final byte[] classFile, Configuration config, Class thisClass) {
ClassLoader parentClassLoader = config.getDynamicLoader().getClassLoader();
if (parentClassLoader == null) {
parentClassLoader = Thread.currentThread().getContextClassLoader();
}
if (parentClassLoader == null) {
parentClassLoader = thisClass.getClassLoader();
}
return new ClassLoader(parentClassLoader) {
@Override
protected Class findClass(String name) throws ClassNotFoundException {
if (name.equals(definedClassName)) {
return defineClass(name, classFile, 0, classFile.length);
} else {
return super.findClass(name);
}
}
};
}
}