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The XSLT and XQuery Processor
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2022 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.query;
import net.sf.saxon.Configuration;
import net.sf.saxon.expr.Literal;
import net.sf.saxon.expr.instruct.Executable;
import net.sf.saxon.expr.instruct.GlobalParam;
import net.sf.saxon.expr.instruct.GlobalVariable;
import net.sf.saxon.expr.parser.CodeInjector;
import net.sf.saxon.expr.parser.OptimizerOptions;
import net.sf.saxon.functions.FunctionLibrary;
import net.sf.saxon.lib.*;
import net.sf.saxon.om.GroundedValue;
import net.sf.saxon.om.NamePool;
import net.sf.saxon.om.StructuredQName;
import net.sf.saxon.s9api.HostLanguage;
import net.sf.saxon.s9api.Location;
import net.sf.saxon.trace.TraceCodeInjector;
import net.sf.saxon.trace.XQueryTraceCodeInjector;
import net.sf.saxon.trans.UncheckedXPathException;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.AnyItemType;
import net.sf.saxon.type.ItemType;
import net.sf.saxon.value.SequenceType;
import javax.xml.transform.ErrorListener;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.*;
/**
* StaticQueryContext contains information used to build a StaticContext for use when processing XQuery
* expressions.
* Despite its name, StaticQueryContext no longer implements the StaticContext
* interface, which means it cannot be used directly by Saxon when parsing a query. Instead it is first copied
* to create a QueryModule object, which does implement the StaticContext interface.
* The application constructs a StaticQueryContext
* and initializes it with information about the context, for example, default namespaces, base URI, and so on.
* When a query is compiled using this StaticQueryContext, the query parser makes a copy of the StaticQueryContext
* and uses this internally, modifying it with information obtained from the query prolog, as well as information
* such as namespace and variable declarations that can occur at any point in the query. The query parser does
* not modify the original StaticQueryContext supplied by the calling application, which may therefore be used
* for compiling multiple queries, serially or even in multiple threads.
* This class forms part of Saxon's published XQuery API. Methods that
* are considered stable are labelled with the JavaDoc "since" tag.
* The value 8.4 indicates a method introduced at or before Saxon 8.4; other
* values indicate the version at which the method was introduced.
* In the longer term, this entire API may at some stage be superseded by a proposed
* standard Java API for XQuery.
*
* @since 8.4
*/
//@CSharpInjectMembers(code = {
// " public void setErrorReporter(System.Action reporter) {"
// + " setErrorReporter(new Saxon.Impl.Helpers.ErrorReportingAction(reporter));"
// + " }"
//})
public class StaticQueryContext {
private Configuration config;
private NamePool namePool;
private String baseURI;
private HashMap userDeclaredNamespaces;
/*@Nullable*/ private Set userDeclaredVariables;
private boolean inheritNamespaces = true;
private boolean preserveNamespaces = true;
private int constructionMode = Validation.PRESERVE;
private String defaultFunctionNamespace = NamespaceConstant.FN;
/*@Nullable*/ private String defaultElementNamespace = NamespaceConstant.NULL;
private ItemType requiredContextItemType = AnyItemType.getInstance();
private boolean preserveSpace = false;
private boolean defaultEmptyLeast = true;
/*@Nullable*/ private ModuleURIResolver moduleURIResolver;
private ErrorReporter errorReporter;
/*@Nullable*/ private CodeInjector codeInjector;
private boolean updating = false;
private String defaultCollationName;
private Location moduleLocation;
private OptimizerOptions optimizerOptions;
private int languageVersion = 31;
/**
* Private constructor used when copying a context
*/
protected StaticQueryContext() {
}
/**
* Create a StaticQueryContext using a given Configuration. This creates a StaticQueryContext for a main module
* (that is, a module that is not a library module). The static query context is initialized from the
* default static query context held in the configuration.
*
* @param config the Saxon Configuration
* @since 8.4
*/
public StaticQueryContext(Configuration config) {
this(config, true);
}
/**
* Create a StaticQueryContext using a given Configuration. This creates a StaticQueryContext for a main module
* (that is, a module that is not a library module). The static query context is initialized from the
* default static query context held in the configuration only if the {@code initialize} argument is set to true.
*
* @param config the Saxon Configuration
* @param initialize specifies whether the static context should be initialized using defaults held in the
* configuration. Setting this to true has the same effect as calling the single-argument
* constructor. Setting it to false is typically used only when creating the default
* static query context held by the configuration.
* @since 9.9
*/
public StaticQueryContext(Configuration config, boolean initialize) {
this.config = config;
this.namePool = config.getNamePool();
this.errorReporter = config.makeErrorReporter();
if (initialize) {
copyFrom(config.getDefaultStaticQueryContext());
} else {
userDeclaredNamespaces = new HashMap<>();
userDeclaredVariables = new HashSet<>();
optimizerOptions = config.getOptimizerOptions();
clearNamespaces();
}
}
/**
* Create a copy of a supplied StaticQueryContext
*
* @param c the StaticQueryContext to be copied
*/
public StaticQueryContext(/*@NotNull*/ StaticQueryContext c) {
copyFrom(c);
}
/**
* Copy details from another StaticQueryContext
* @param c the other StaticQueryContext
*/
public void copyFrom(/*@NotNull*/ StaticQueryContext c) {
config = c.config;
namePool = c.namePool;
baseURI = c.baseURI;
moduleURIResolver = c.moduleURIResolver;
if (c.userDeclaredNamespaces != null) {
userDeclaredNamespaces = new HashMap<>(c.userDeclaredNamespaces);
}
if (c.userDeclaredVariables != null) {
userDeclaredVariables = new HashSet<>(c.userDeclaredVariables);
}
inheritNamespaces = c.inheritNamespaces;
preserveNamespaces = c.preserveNamespaces;
constructionMode = c.constructionMode;
defaultElementNamespace = c.defaultElementNamespace;
defaultFunctionNamespace = c.defaultFunctionNamespace;
requiredContextItemType = c.requiredContextItemType;
preserveSpace = c.preserveSpace;
defaultEmptyLeast = c.defaultEmptyLeast;
moduleURIResolver = c.moduleURIResolver;
errorReporter = c.errorReporter;
codeInjector = c.codeInjector;
updating = c.updating;
optimizerOptions = c.optimizerOptions;
}
/**
* Reset the state of this StaticQueryContext to an uninitialized state
*
* @since 8.4
*/
public void reset() {
userDeclaredNamespaces = new HashMap<>(10);
errorReporter = config.makeErrorReporter();
constructionMode = getConfiguration().isLicensedFeature(Configuration.LicenseFeature.ENTERPRISE_XQUERY) ?
Validation.PRESERVE : Validation.STRIP;
preserveSpace = false;
defaultEmptyLeast = true;
requiredContextItemType = AnyItemType.getInstance();
defaultFunctionNamespace = NamespaceConstant.FN;
defaultElementNamespace = NamespaceConstant.NULL;
moduleURIResolver = null;
defaultCollationName = config.getDefaultCollationName();
clearNamespaces();
updating = false;
optimizerOptions = config.getOptimizerOptions();
}
/**
* Set the Configuration options
*
* @param config the Saxon Configuration
* @throws IllegalArgumentException if the configuration supplied is different from the existing
* configuration
* @since 8.4
*/
public void setConfiguration(/*@NotNull*/ Configuration config) {
if (this.config != null && this.config != config) {
throw new IllegalArgumentException("Configuration cannot be changed dynamically");
}
this.config = config;
namePool = config.getNamePool();
}
/**
* Get the Configuration options
*
* @return the Saxon configuration
* @since 8.4
*/
public Configuration getConfiguration() {
return config;
}
/**
* Get the executable containing this query
*
* @return the executable (which is newly created by this method)
*/
/*@NotNull*/
public Executable makeExecutable() {
Executable executable = new Executable(config);
executable.setSchemaAware(isSchemaAware());
executable.setHostLanguage(HostLanguage.XQUERY);
return executable;
}
/**
* Say whether this query is schema-aware
*
* @param aware true if this query is schema-aware
* @since 9.2.1.2
*/
public void setSchemaAware(boolean aware) {
if (aware) {
throw new UnsupportedOperationException("Schema-awareness requires Saxon-EE");
}
}
/**
* Ask whether this query is schema-aware
*
* @return true if this query is schema-aware
* @since 9.2.1.2
*/
public boolean isSchemaAware() {
return false;
}
/**
* Say whether the query should be compiled and evaluated to use streaming.
* This affects subsequent calls on the compile() methods. This option requires
* Saxon-EE.
* @param option if true, the compiler will attempt to compile a query to be
* capable of executing in streaming mode. If the query cannot be streamed,
* a compile-time exception is reported. In streaming mode, the source
* document is supplied as a stream, and no tree is built in memory. The default
* is false. Setting the value to true has the side-effect of setting the required
* context item type to "document node"; this is to ensure that expresions such as
* //BOOK are streamable.
* @since 9.6
*/
public void setStreaming(boolean option) {
if (option) {
throw new UnsupportedOperationException("Streaming requires Saxon-EE");
}
}
/**
* Ask whether the streaming option has been set, that is, whether
* subsequent calls on compile() will compile queries to be capable
* of executing in streaming mode.
* @return true if the streaming option has been set.
* @since 9.6
*/
public boolean isStreaming() {
return false;
}
/**
* Set the Base URI of the query
*
* @param baseURI the base URI of the query, or null to indicate that no base URI is available
* @since 8.4
*/
public void setBaseURI(String baseURI) {
this.baseURI = baseURI;
}
/**
* Set the language version.
*
* @param version The XQuery language version. Must be 10 (="1.0") or 30 (="3.0") or 31 (="3.1").
* @since 9.2; changed in 9.3 to expect a DecimalValue rather than a string. Changed in 9.7 to
* accept an int (30 = "3.0") and to allow "3.1". From 9.8.0.3 the supplied value is ignored
* and the language version is always set to "3.1". From 11.0 the value 40 is accepted.
*/
public void setLanguageVersion(int version) {
if (version==10 || version==30 || version==31) {
languageVersion = 31;
} else if (version == 40) {
languageVersion = 40;
} else {
throw new IllegalArgumentException("languageVersion = " + version);
}
}
/**
* Get the language version
*
* @return the language version. Either "1.0" or "1.1". Default is "1.0".
* @since 9.2; changed in 9.3 to return a DecimalValue rather than a string;
* changed in 9.7 to return an int (30 = "3.0" and so on). Changed in 9.8.0.3 to
* always return 31. Changed in 11.0 to return 31 or 40.
*/
public int getLanguageVersion() {
return languageVersion;
}
/**
* Get any extension function library that was previously set.
*
* @return the extension function library, or null if none has been set. The result will always be null if called
* in Saxon-HE; setting an extension function library requires the Saxon-PE or Saxon-EE versions of this class.
* @since 9.4
*/
/*@Nullable*/
public FunctionLibrary getExtensionFunctionLibrary() {
return null;
}
/**
* Ask whether compile-time generation of trace code was requested
*
* @return true if compile-time generation of code was requested
* @since 9.0
*/
public boolean isCompileWithTracing() {
return codeInjector instanceof TraceCodeInjector;
}
/**
* Request compile-time generation of trace code (or not)
*
* @param trace true if compile-time generation of trace code is required
* @since 9.0
*/
public void setCompileWithTracing(boolean trace) {
codeInjector = trace ? new XQueryTraceCodeInjector() : null;
}
/**
* Request that the parser should insert custom code into the expression tree
* by calling a supplied CodeInjector to process each expression as it is parsed,
* for example for tracing or performance measurement
*
* @param injector the CodeInjector to be used. May be null, in which case
* no code is injected
* @since 9.4
*/
public void setCodeInjector( /*@Nullable*/ CodeInjector injector) {
this.codeInjector = injector;
}
/**
* Get any CodeInjector that has been registered
*
* @return the registered CodeInjector, or null
* @since 9.4
*/
/*@Nullable*/
public CodeInjector getCodeInjector() {
return codeInjector;
}
/**
* Ask whether XQuery Update is allowed
*
* @return true if XQuery update is supported by queries using this context
*/
public boolean isUpdating() {
return updating;
}
/**
* Set the namespace inheritance mode
*
* @param inherit true if namespaces are inherited, false if not
* @since 8.4
*/
public void setInheritNamespaces(boolean inherit) {
inheritNamespaces = inherit;
}
/**
* Get the namespace inheritance mode
*
* @return true if namespaces are inherited, false if not
* @since 8.4
*/
public boolean isInheritNamespaces() {
return inheritNamespaces;
}
/**
* Set the namespace copy mode
*
* @param inherit true if namespaces are preserved, false if not
* @since 8.4
*/
public void setPreserveNamespaces(boolean inherit) {
preserveNamespaces = inherit;
}
/**
* Get the namespace copy mode
*
* @return true if namespaces are preserved, false if not
* @since 8.4
*/
public boolean isPreserveNamespaces() {
return preserveNamespaces;
}
/**
* Set the construction mode for this module
*
* @param mode one of {@link net.sf.saxon.lib.Validation#STRIP}, {@link net.sf.saxon.lib.Validation#PRESERVE}
* @since 8.4
*/
public void setConstructionMode(int mode) {
constructionMode = mode;
}
/**
* Get the current construction mode
*
* @return one of {@link net.sf.saxon.lib.Validation#STRIP}, {@link net.sf.saxon.lib.Validation#PRESERVE}
* @since 8.4
*/
public int getConstructionMode() {
return constructionMode;
}
/**
* Set the module location. Normally the module location is assumed to be line 1, column 1 of the
* resource identified by the base URI. But a different location can be set, for example if the query
* is embedded in an XML document, and this information will be available in diagnostics.
* @param location the module location
* @since 9.7
*/
public void setModuleLocation(Location location) {
this.moduleLocation = location;
}
/**
* Get the module location. Normally the module location is assumed to be line 1, column 1 of the
* resource identified by the base URI. But a different location can be set, for example if the query
* is embedded in an XML document, and this information will be available in diagnostics.
* @return the module location
* @since 9.7
*/
public Location getModuleLocation() {
return moduleLocation;
}
/**
* Set the optimizer options to be used for compiling queries that use this static context.
* By default the optimizer options set in the {@link Configuration} are used.
*
* @param options the optimizer options to be used
*/
public void setOptimizerOptions(OptimizerOptions options) {
this.optimizerOptions = options;
}
/**
* Get the optimizer options being used for compiling queries that use this static context.
* By default the optimizer options set in the {@link Configuration} are used.
*
* @return the optimizer options being used
*/
public OptimizerOptions getOptimizerOptions() {
return this.optimizerOptions;
}
/**
* Prepare an XQuery query for subsequent evaluation. The source text of the query
* is supplied as a String. The base URI of the query is taken from the static context,
* and defaults to the current working directory.
* Note that this interface makes the caller responsible for decoding the query and
* presenting it as a string of characters. This means it is likely that any encoding
* specified in the query prolog will be ignored.
*
* @param query The XQuery query to be evaluated, supplied as a string.
* @return an XQueryExpression object representing the prepared expression
* @throws net.sf.saxon.trans.XPathException
* if the syntax of the expression is wrong,
* or if it references namespaces, variables, or functions that have not been declared,
* or contains other static errors.
* @since 8.4
*/
/*@NotNull*/
public XQueryExpression compileQuery(/*@NotNull*/ String query) throws XPathException {
XQueryParser qp = (XQueryParser) config.newExpressionParser("XQ", updating, languageVersion);
if (codeInjector != null) {
qp.setCodeInjector(codeInjector);
} else if (config.isCompileWithTracing()) {
qp.setCodeInjector(new TraceCodeInjector());
}
qp.setStreaming(isStreaming());
QueryModule mainModule = new QueryModule(this);
return qp.makeXQueryExpression(query, mainModule, config);
}
/**
* Prepare an XQuery query for subsequent evaluation. The Query is supplied
* in the form of a Reader. The base URI of the query is taken from the static context,
* and defaults to the current working directory.
* Note that this interface makes the Reader responsible for decoding the query and
* presenting it as a stream of characters. This means it is likely that any encoding
* specified in the query prolog will be ignored. Also, some implementations of Reader
* cannot handle a byte order mark.
*
* @param source A Reader giving access to the text of the XQuery query to be compiled.
* @return an XPathExpression object representing the prepared expression.
* @throws net.sf.saxon.trans.XPathException
* if the syntax of the expression is wrong, or if it references namespaces,
* variables, or functions that have not been declared, or any other static error is reported.
* @throws java.io.IOException if a failure occurs reading the supplied input.
* @since 8.4
*/
/*@Nullable*/
public synchronized XQueryExpression compileQuery(/*@NotNull*/ Reader source)
throws XPathException, IOException {
char[] buffer = new char[4096];
StringBuilder sb = new StringBuilder(4096);
while (true) {
int n = source.read(buffer);
if (n > 0) {
sb.append(buffer, 0, n);
} else {
break;
}
}
return compileQuery(sb.toString());
}
/**
* Prepare an XQuery query for subsequent evaluation. The Query is supplied
* in the form of a InputStream, with an optional encoding. If the encoding is not specified,
* the query parser attempts to obtain the encoding by inspecting the input stream: it looks specifically
* for a byte order mark, and for the encoding option in the version declaration of an XQuery prolog.
* The encoding defaults to UTF-8.
* The base URI of the query is taken from the static context,
* and defaults to the current working directory.
*
* @param source An InputStream giving access to the text of the XQuery query to be compiled, as a stream
* of octets
* @param encoding The encoding used to translate characters to octets in the query source. The parameter
* may be null: in this case the query parser attempts to infer the encoding by inspecting the source,
* and if that fails, it assumes UTF-8 encoding
* @return an XPathExpression object representing the prepared expression.
* @throws net.sf.saxon.trans.XPathException
* if the syntax of the expression is wrong, or if it references namespaces,
* variables, or functions that have not been declared, or any other static error is reported.
* @since 8.5
*/
/*@Nullable*/
public synchronized XQueryExpression compileQuery(/*@NotNull*/ InputStream source, /*@Nullable*/ String encoding)
throws XPathException {
try {
String query = QueryReader.readInputStream(source, encoding, config.getValidCharacterChecker());
return compileQuery(query);
} catch (UncheckedXPathException e) {
throw e.getXPathException();
}
}
/**
* Compile an XQuery library module for subsequent evaluation. This method is supported
* only in Saxon-EE
*
* @param query the content of the module, as a string
* @throws XPathException if a static error exists in the query
* @throws UnsupportedOperationException if not using Saxon-EE
* @since 9.2 (changed in 9.3 to return void)
*/
public void compileLibrary(String query) throws XPathException {
throw new XPathException("Separate compilation of query libraries requires Saxon-EE");
}
/**
* Prepare an XQuery library module for subsequent evaluation. This method is supported
* only in Saxon-EE. The effect of the method is that subsequent query compilations using this static
* context can import the module URI without specifying a location hint; the import then takes effect
* without requiring the module to be compiled each time it is imported.
*
* @param source the content of the module, as a Reader which supplies the source code
* @throws XPathException if a static error exists in the query
* @throws IOException if the input cannot be read
* @throws UnsupportedOperationException if not using Saxon-EE
* @since 9.2 (changed in 9.3 to return void)
*/
public void compileLibrary(Reader source)
throws XPathException, IOException {
throw new XPathException("Separate compilation of query libraries requires Saxon-EE");
}
/**
* Prepare an XQuery library module for subsequent evaluation. This method is supported
* only in Saxon-EE. The effect of the method is that subsequent query compilations using this static
* context can import the module URI without specifying a location hint; the import then takes effect
* without requiring the module to be compiled each time it is imported.
*
* @param source the content of the module, as an InputStream which supplies the source code
* @param encoding the character encoding of the input stream. May be null, in which case the encoding
* is inferred, for example by looking at the query declaration
* @throws XPathException if a static error exists in the query
* @throws IOException if the input cannot be read
* @throws UnsupportedOperationException if not using Saxon-EE
* @since 9.2 (changed in 9.3 to return void)
*/
public void compileLibrary(InputStream source, /*@Nullable*/ String encoding)
throws XPathException, IOException {
throw new UnsupportedOperationException("Separate compilation of query libraries requires Saxon-EE");
}
/**
* Get a previously compiled library module
*
* @param namespace the module namespace
* @return the QueryLibrary if a module with this namespace has been compiled as a library module;
* otherwise null. Always null when not using Saxon-EE.
* @since 9.3
*/
/*@Nullable*/
public QueryLibrary getCompiledLibrary(String namespace) {
return null;
}
public Iterable getCompiledLibraries() {
return Collections.emptySet();
}
/**
* Declare a namespace whose prefix can be used in expressions. This is
* equivalent to declaring a prefix in the Query prolog.
* Any namespace declared in the Query prolog overrides a namespace declared using
* this API.
*
* @param prefix The namespace prefix. Must not be null. Setting this to "" means that the
* namespace will be used as the default namespace for elements and types.
* @param uri The namespace URI. Must not be null. The value "" (zero-length string) is used
* to undeclare a namespace; it is not an error if there is no existing binding for
* the namespace prefix.
* @throws NullPointerException if either the prefix or URI is null
* @throws IllegalArgumentException if the prefix is "xml" and the namespace is not the XML namespace, or vice
* versa; or if the prefix is "xmlns", or the URI is "http://www.w3.org/2000/xmlns/"
* @since 9.0
*/
public void declareNamespace( /*@Nullable*/ String prefix, /*@Nullable*/ String uri) {
if (prefix == null) {
throw new NullPointerException("Null prefix supplied to declareNamespace()");
}
if (uri == null) {
throw new NullPointerException("Null namespace URI supplied to declareNamespace()");
}
if (prefix.equals("xml") != uri.equals(NamespaceConstant.XML)) {
throw new IllegalArgumentException("Misdeclaration of XML namespace");
}
if (prefix.equals("xmlns") || uri.equals(NamespaceConstant.XMLNS)) {
throw new IllegalArgumentException("Misdeclaration of xmlns namespace");
}
if (prefix.isEmpty()) {
defaultElementNamespace = uri;
}
if (uri.isEmpty()) {
userDeclaredNamespaces.remove(prefix);
} else {
userDeclaredNamespaces.put(prefix, uri);
}
}
/**
* Clear all the user-declared namespaces
*
* @since 9.0
*/
public void clearNamespaces() {
userDeclaredNamespaces.clear();
declareNamespace("xml", NamespaceConstant.XML);
declareNamespace("xs", NamespaceConstant.SCHEMA);
declareNamespace("xsi", NamespaceConstant.SCHEMA_INSTANCE);
declareNamespace("fn", NamespaceConstant.FN);
declareNamespace("local", NamespaceConstant.LOCAL);
declareNamespace("err", NamespaceConstant.ERR);
declareNamespace("saxon", NamespaceConstant.SAXON);
declareNamespace("", "");
}
/**
* Get the map of user-declared namespaces
*
* @return the user-declared namespaces
*/
protected HashMap getUserDeclaredNamespaces() {
return userDeclaredNamespaces;
}
/**
* Get the namespace prefixes that have been declared using the method {@link #declareNamespace}
*
* @return an iterator that returns the namespace prefixes that have been explicitly declared, as
* strings. The default namespace for elements and types will be included, using the prefix "".
* @since 9.0
*/
public Iterator iterateDeclaredPrefixes() {
return userDeclaredNamespaces.keySet().iterator();
}
/**
* Get the namespace URI for a given prefix, which must have been declared using the method
* {@link #declareNamespace}.
*
* @param prefix the namespace prefix, or "" to represent the null prefix
* @return the namespace URI. Returns "" to represent the non-namespace,
* null to indicate that the prefix has not been declared
*/
public String getNamespaceForPrefix(String prefix) {
return userDeclaredNamespaces.get(prefix);
}
/**
* Get the default function namespace
*
* @return the default function namespace (defaults to the fn: namespace)
* @since 8.4
*/
public String getDefaultFunctionNamespace() {
return defaultFunctionNamespace;
}
/**
* Set the default function namespace
*
* @param defaultFunctionNamespace The namespace to be used for unprefixed function calls
* @since 8.4
*/
public void setDefaultFunctionNamespace(String defaultFunctionNamespace) {
this.defaultFunctionNamespace = defaultFunctionNamespace;
}
/**
* Set the default element namespace
*
* @param uri the namespace URI to be used as the default namespace for elements and types
* @since 8.4
*/
public void setDefaultElementNamespace(String uri) {
defaultElementNamespace = uri;
declareNamespace("", uri);
}
/**
* Get the default namespace for elements and types
*
* @return the namespace URI to be used as the default namespace for elements and types
* @since 8.9 Modified in 8.9 to return the namespace URI as a string rather than an integer code
*/
/*@Nullable*/
public String getDefaultElementNamespace() {
return defaultElementNamespace;
}
/**
* Declare a global variable. This has the same effect as including a global variable declaration
* in the Query Prolog of the main query module. A static error occurs when compiling the query if the
* query prolog contains a declaration of the same variable.
*
* @param qName the qualified name of the variable
* @param type the declared type of the variable
* @param value the initial value of the variable. May be null if the variable is external.
* @param external true if the variable is external, that is, if its value may be set at run-time.
* @throws NullPointerException if the value is null, unless the variable is external
* @throws XPathException if the value of the variable is not consistent with its type.
* @since 9.1
*/
public void declareGlobalVariable(
StructuredQName qName, SequenceType type, GroundedValue value, boolean external)
throws XPathException {
if (value == null && !external) {
throw new NullPointerException("No initial value for declared variable");
}
if (value != null && !type.matches(value, getConfiguration().getTypeHierarchy())) {
throw new XPathException("Value of declared variable does not match its type");
}
GlobalVariable var = external ? new GlobalParam() : new GlobalVariable();
var.setVariableQName(qName);
var.setRequiredType(type);
if (value != null) {
var.setBody(Literal.makeLiteral(value.materialize()));
}
if (userDeclaredVariables == null) {
userDeclaredVariables = new HashSet<>();
}
userDeclaredVariables.add(var);
}
/**
* Iterator over all the declared global variables
*
* @return an iterator over all the global variables that have been declared. They are returned
* as instances of class {@link GlobalVariable}
* @since 9.1
*/
public Iterable iterateDeclaredGlobalVariables() {
if (userDeclaredVariables == null) {
return Collections.emptyList();
} else {
return userDeclaredVariables;
}
}
/**
* Clear all declared global variables
*
* @since 9.1
*/
public void clearDeclaredGlobalVariables() {
userDeclaredVariables = null;
}
/**
* Set a user-defined ModuleURIResolver for resolving URIs used in "import module"
* declarations in the XQuery prolog.
* This will be used for resolving URIs in XQuery "import module" declarations, overriding
* any ModuleURIResolver that was specified as part of the configuration.
*
* @param resolver the ModuleURIResolver to be used
*/
public void setModuleURIResolver(ModuleURIResolver resolver) {
moduleURIResolver = resolver;
}
/**
* Get the user-defined ModuleURIResolver for resolving URIs used in "import module"
* declarations in the XQuery prolog; returns null if none has been explicitly set either
* on the StaticQueryContext or on the Configuration.
*
* @return the registered ModuleURIResolver
*/
/*@Nullable*/
public ModuleURIResolver getModuleURIResolver() {
return moduleURIResolver;
}
/**
* Set the default collation.
*
* @param name The collation name, as specified in the query prolog. Must be the name
* of a known registered collation.
* @throws NullPointerException if the supplied value is null
* @throws IllegalStateException if the supplied value is not a known collation URI registered with the
* configuration.
* @since 8.4. Changed in 9.7.0.15 so that it validates the collation name: see bug 3121.
*/
public void declareDefaultCollation(String name) {
if (name == null) {
throw new NullPointerException();
}
StringCollator c;
try {
c = getConfiguration().getCollation(name);
} catch (XPathException e) {
c = null;
}
if (c == null) {
throw new IllegalStateException("Unknown collation " + name);
}
this.defaultCollationName = name;
}
/**
* Get the name of the default collation.
*
* @return the name of the default collation; or the name of the codepoint collation
* if no default collation has been defined. The name is returned in the form
* it was specified; that is, it is not yet resolved against the base URI. (This
* is because the base URI declaration can follow the default collation declaration
* in the query prolog.) If no default collation has been specified, the "default default"
* (that is, the Unicode codepoint collation) is returned.
* @since 8.4
*/
/*@Nullable*/
public String getDefaultCollationName() {
return defaultCollationName;
}
/**
* Declare the static type of the context item. If this type is declared, and if a context item
* is supplied when the query is invoked, then the context item must conform to this type (no
* type conversion will take place to force it into this type).
*
* @param type the required type of the context item
*/
public void setRequiredContextItemType(ItemType type) {
requiredContextItemType = type;
}
/**
* Get the required type of the context item. If no type has been explicitly declared for the context
* item, an instance of AnyItemType (representing the type item()) is returned.
*
* @return the required type of the context item
*/
public ItemType getRequiredContextItemType() {
return requiredContextItemType;
}
/**
* Get the NamePool used for compiling expressions
*
* @return the name pool
* @since 8.4
*/
public NamePool getNamePool() {
return namePool;
}
/**
* Get the system ID of the container of the expression. Used to construct error messages.
* Note that the systemID and the Base URI are currently identical, but they might be distinguished
* in the future.
*
* @return the Base URI
* @since 8.4
*/
public String getSystemId() {
return baseURI;
}
/**
* Get the Base URI of the query, for resolving any relative URI's used
* in the expression.
* Note that the systemID and the Base URI are currently identical, but they might be distinguished
* in the future.
* Used by the document() function.
*
* @return the base URI of the query
* @since 8.4
*/
public String getBaseURI() {
return baseURI;
}
/**
* Set the policy for preserving boundary space
*
* @param preserve true if boundary space is to be preserved, false if it is to be stripped
* @since 9.0
*/
public void setPreserveBoundarySpace(boolean preserve) {
preserveSpace = preserve;
}
/**
* Ask whether the policy for boundary space is "preserve" or "strip"
*
* @return true if the policy is to preserve boundary space, false if it is to strip it
* @since 9.0
*/
public boolean isPreserveBoundarySpace() {
return preserveSpace;
}
/**
* Set the option for where an empty sequence appears in the collation order, if not otherwise
* specified in the "order by" clause
*
* @param least true if the empty sequence is considered less than any other value (the default),
* false if it is considered greater than any other value
* @since 9.0
*/
public void setEmptyLeast(boolean least) {
defaultEmptyLeast = least;
}
/**
* Ask where an empty sequence should appear in the collation order, if not otherwise
* specified in the "order by" clause
*
* @return true if the empty sequence is considered less than any other value (the default),
* false if it is considered greater than any other value
* @since 9.0
*/
public boolean isEmptyLeast() {
return defaultEmptyLeast;
}
/**
* Set the ErrorListener to be used to report compile-time errors in a query. This will also
* be the default for the run-time error listener used to report dynamic errors.
*
* @param listener the ErrorListener to be used
* @deprecated since 10.0: use {@link #setErrorReporter(ErrorReporter)}
*/
@Deprecated
public void setErrorListener(ErrorListener listener) {
setErrorReporter(new ErrorReporterToListener(listener));
}
/**
* Get the ErrorListener in use for this static context
*
* @return the registered ErrorListener
* @deprecated since 10.0: use {@link #getErrorReporter()}
*/
@Deprecated
public ErrorListener getErrorListener() {
if (errorReporter instanceof ErrorReporterToListener) {
return ((ErrorReporterToListener) errorReporter).getErrorListener();
} else {
return null;
}
}
/**
* Set an error reporter: that is, a used-supplied object that is to receive
* notification of static errors found in the stylesheet
*
* @param reporter the object to be notified of static errors
* @since 10.0
*/
public void setErrorReporter(ErrorReporter reporter) {
this.errorReporter = reporter;
}
/**
* Get the error reporter: that is, a used-supplied object that is to receive
* notification of static errors found in the stylesheet
*
* @return the object to be notified of static errors. This may be the error reporter
* that was previously set using {@link #setErrorReporter(ErrorReporter)}, or it may be
* a system-allocated error reporter.
* @since 10.0
*/
public ErrorReporter getErrorReporter() {
return this.errorReporter;
}
/**
* Say whether the query is allowed to be updating. XQuery update syntax will be rejected
* during query compilation unless this flag is set.
*
* @param updating true if the query is allowed to use the XQuery Update facility
* (requires Saxon-EE). If set to false, the query must not be an updating query. If set
* to true, it may be either an updating or a non-updating query.
* @since 9.1
*/
public void setUpdatingEnabled(boolean updating) {
this.updating = updating;
}
/**
* Ask whether the query is allowed to be updating
*
* @return true if the query is allowed to use the XQuery Update facility. Note that this
* does not necessarily mean that the query is an updating query; but if the value is false,
* the it must definitely be non-updating.
* @since 9.1
*/
public boolean isUpdatingEnabled() {
return updating;
}
}