Examples of net.sf.saxon.Configuration

net.sf.saxon.Configuration
This class holds details of user-selected configuration options for a set of transformations and/or queries. When running XSLT, the preferred way of setting configuration options is via the JAXP TransformerFactory interface, but the Configuration object provides a finer level of control. As yet there is no standard API for XQuery, so the only way of setting Configuration information is to use the methods on this class directly.

As well as holding configuration settings, this class acts as a factory for classes providing service in particular areas: error handling, URI resolution, and the like. Some of these services are chosen on the basis of the current platform (Java or .NET), some vary depending whether the environment is schema-aware or not.

The Configuration provides access to a {@link NamePool} which is used to manageall the names used in stylesheets, queries, schemas, and source and documents: the NamePool allocates integer codes to these names allowing efficient storage and comparison. Normally there will be a one-to-one relationship between a NamePool and a Configuration. It is possible, however, for several Configuration objects to share the same NamePool. Until Saxon 8.9, by default all Configuration objects shared a single NamePool unless configured otherwise; this changed in 8.9 so that the default is to allocate a new NamePool for each Configuration.

The Configuration establishes the scope within which node identity is managed. Every document belongs to a Configuration, and every node has a distinct identity within that Configuration. In consequence, it is not possible for any query or transformation to manipulate multiple documents unless they all belong to the same Configuration.

Saxon-EE has a subclass of the Configuration class which provides the additional services needed for schema-aware processing. The {@link com.saxonica.config.EnterpriseConfiguration}also holds a cache of loaded schema components used for compiling schema-aware transformations and queries, and for validating instance documents.

Since Saxon 8.4, the JavaDoc documentation for Saxon attempts to identify interfaces that are considered stable, and will only be changed in a backwards-incompatible way if there is an overriding reason to do so. These interfaces and methods are labelled with the JavaDoc "since" tag. The value 8.n indicates a method in this category that was introduced in Saxon version 8.n: or in the case of 8.4, that was present in Saxon 8.4 and possibly in earlier releases. (In some cases, these methods have been unchanged for a long time.) Methods without a "since" tag, although public, are provided for internal use or for use by advanced users, and are subject to change from one release to the next. The presence of a "since" tag on a class or interface indicates that there are one or more methods in the class that are considered stable; it does not mean that all methods are stable. @since 8.4

     * @throws XPathException if static errors are found
     */


    public static Expression rewriteEffectiveBooleanValue(
            Expression exp, ExpressionVisitor visitor, ItemType contextItemType) throws XPathException {
        Configuration config = visitor.getConfiguration();
        TypeHierarchy th = config.getTypeHierarchy();
        exp = ExpressionTool.unsortedIfHomogeneous(config.getOptimizer(), exp);
        if (exp instanceof ValueComparison) {
            ValueComparison vc = (ValueComparison)exp;
            if (vc.getResultWhenEmpty() == null) {
                vc.setResultWhenEmpty(BooleanValue.FALSE);
            }

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            // TODO: not really worth separating from General
            AtomicValue item = (AtomicValue)Value.asItem(value);
            if (item == null) {
                return null;
            }
            Configuration config = context.getConfiguration();
            PJConverter converter = allocate(
                    config, item.getItemType(config.getTypeHierarchy()), StaticProperty.EXACTLY_ONE, targetClass);
            return converter.convert(item, targetClass, context);
        }

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        public static General INSTANCE = new General();


        public Object convert(ValueRepresentation value, Class targetClass, XPathContext context)
                throws XPathException {
            Value val = Value.asValue(value).reduce();
            Configuration config = context.getConfiguration();
            PJConverter converter = allocate(
                    config, val.getItemType(config.getTypeHierarchy()), val.getCardinality(), targetClass);
            if (converter instanceof General) {
                converter = Identity.INSTANCE;
            }
            return converter.convert(val, targetClass, context);
        }

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        }


    }


    private void outputElement(Element element, NamedNodeMap atts) throws XPathException {
        final Configuration config = pipe.getConfiguration();
        String[] elparts2 = nsSupport.processName(element.getTagName(), elparts, false);
        if (elparts2==null) {
              throw new XPathException("Undeclared namespace in " + element.getTagName());
        }
        String uri = elparts2[0];
        String local = elparts2[1];
        String prefix = NameChecker.getPrefix(elparts2[2]);


        NamePool namePool = config.getNamePool();
        int nameCode = namePool.allocate(prefix, uri, local);


        receiver.startElement(nameCode, StandardNames.XS_UNTYPED, 0, 0);
        for (Iterator<String> iter = nsDeclarations.keySet().iterator(); iter.hasNext();) {
            String nsprefix = iter.next();

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    public Document parse(InputSource in) throws SAXException {
        try {
            Builder builder = new TinyBuilder();
            if (config == null) {
                config = new Configuration();
            }
            PipelineConfiguration pipe = config.makePipelineConfiguration();
            builder.setPipelineConfiguration(pipe);
            SAXSource source = new SAXSource(in);
            if (entityResolver != null) {

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        StringCollator collation = null;
        if (controller != null) {
            collation = controller.getExecutable().getNamedCollation(name);


            if (collation == null) {
                Configuration config = controller.getConfiguration();
                collation = config.getCollationURIResolver().resolve(name, null, config);
            }
        }
        if (collation==null) {
            XPathException e = new XPathException("Unknown collation " + name);
            e.setErrorCode("FOCH0002"); // Caller may have to change this

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                }
            };
        } else if (NodeList.class.isAssignableFrom(sourceClass)) {
            return new JPConverter() {
                public ValueRepresentation convert(Object obj, XPathContext context) throws XPathException {
                    Configuration config = context.getConfiguration();
                    NodeList list = ((NodeList)obj);
                    final int len = list.getLength();
                    NodeInfo[] nodes = new NodeInfo[len];
                    for (int i = 0; i < len; i++) {
                        nodes[i] = wrapOrUnwrapNode(list.item(i), config);

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     * set to allow early evaluation.
     * @param visitor an expression visitor
     */


    public Expression preEvaluate(ExpressionVisitor visitor) {
        Configuration config = visitor.getConfiguration();
        if (((Boolean)config.getConfigurationProperty(
                FeatureKeys.PRE_EVALUATE_DOC_FUNCTION)).booleanValue()) {
            try {
                AtomicValue hrefVal = (AtomicValue)argument[0].evaluateItem(null);
                if (hrefVal==null) {
                    return null;

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                namespace = "";
            } else {
                namespace = namespace.trim();
            }
            PreparedStylesheet preparedStylesheet = getPreparedStylesheet();
            Configuration config = preparedStylesheet.getConfiguration();
            if (!config.isLicensedFeature(Configuration.LicenseFeature.SCHEMA_AWARE_XSLT)) {
                compileError("To use xsl:import-schema, you need the schema-aware " +
                        "version of Saxon from http://www.saxonica.com/", "XTSE1650");
                return;
            }
            AxisIterator kids = iterateAxis(Axis.CHILD);
            NodeInfo inlineSchema = null;
            while (true) {
                Item child = kids.next();
                if (child==null) {
                    break;
                }
                if (inlineSchema != null) {
                    compileError(getDisplayName() + " must not have more than one child element");
                }
                inlineSchema = (NodeInfo)child;
                if (inlineSchema.getFingerprint() != StandardNames.XS_SCHEMA) {
                    compileError("The only child element permitted for " + getDisplayName() + " is xs:schema");
                }
                if (schemaLoc != null) {
                    compileError("The schema-location attribute must be absent if an inline schema is present");
                }


                namespace = config.readInlineSchema(inlineSchema, namespace,
                        preparedStylesheet.getCompilerInfo().getErrorListener());
                getPrincipalStylesheet().addImportedSchema(namespace);
            }
            if (inlineSchema != null) {
                return;
            }
            if (!config.isSchemaAvailable(namespace)) {
                if (schemaLoc == null) {
                    compileWarning("No schema for this namespace is known, " +
                            "and no schema-location was supplied, so no schema has been imported",
                            SaxonErrorCode.SXWN9006);
                    return;
                }
                PipelineConfiguration pipe = config.makePipelineConfiguration();
                namespace = config.readSchema(pipe, getBaseURI(), schemaLoc, namespace);
            }
            getPrincipalStylesheet().addImportedSchema(namespace);
        } catch (SchemaException err) {
            compileError(err.getMessage(), "XTSE0220");
        } catch (TransformerConfigurationException err) {

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     */


    public static QueryModule makeQueryModule (
            String baseURI, Executable executable, QueryModule importer,
            String query, String namespaceURI, boolean allowCycles) throws XPathException {
        Configuration config = executable.getConfiguration();
        QueryModule module = new QueryModule(config, importer);
        try {
            module.setLocationURI(new URI(baseURI));
        } catch (URISyntaxException e) {
            throw new XPathException("Invalid location URI " + baseURI, e);
        }
        module.setBaseURI(baseURI);
        module.setExecutable(executable);
        module.setModuleNamespace(namespaceURI);


        executable.addQueryLibraryModule(module);
        QueryParser qp = importer.getUserQueryContext().newQueryParser(
                importer.isUpdating(), importer.getLanguageVersion());
        qp.setCompileWithTracing(config.isCompileWithTracing());
        qp.setDisableCycleChecks(allowCycles);
        qp.parseLibraryModule(query, module);


        if (module.getModuleNamespace() == null) {
            XPathException err = new XPathException("Imported module must be a library module");

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