net.sf.saxon.s9api

Class XQueryCompiler

public class XQueryCompiler extends Object

An XQueryCompiler object allows XQuery 1.0 queries to be compiled. The compiler holds information that represents the static context for the compilation.

To construct an XQueryCompiler, use the factory method Processor.

An XQueryCompiler may be used repeatedly to compile multiple queries. Any changes made to the XQueryCompiler (that is, to the static context) do not affect queries that have already been compiled. An XQueryCompiler may be used concurrently in multiple threads, but it should not then be modified once initialized.

Since: 9.0

Constructor Summary
protected XQueryCompiler(Processor processor)
Protected constructor
Method Summary
XQueryExecutablecompile(String query)
Compile a query supplied as a string.
XQueryExecutablecompile(File query)
Compile a query supplied as a file
XQueryExecutablecompile(InputStream query)
Compile a query supplied as an InputStream

The base URI of the query should be supplied by calling setBaseURI

XQueryExecutablecompile(Reader query)
Compile a query supplied as a Reader

The base URI of the query should be supplied by calling setBaseURI

voidcompileLibrary(String query)
Compile a library module supplied as a string.
voidcompileLibrary(File query)
Compile a library module supplied as a file.
voidcompileLibrary(Reader query)
Compile a library module supplied as a Reader.
voidcompileLibrary(InputStream query)
Compile a library module supplied as an InputStream.
voiddeclareNamespace(String prefix, String uri)
Declare a namespace binding as part of the static context for queries compiled using this XQueryCompiler.
URIgetBaseURI()
Get the static base URI for the query
StringgetEncoding()
Get the encoding previously set for the supplied query.
ErrorListenergetErrorListener()
Get the ErrorListener being used during this compilation episode
StringgetLanguageVersion()
Ask whether an XQuery 1.0 or XQuery 1.1 processor is being used
ModuleURIResolvergetModuleURIResolver()
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 here or in the Saxon Configuration.
ItemTypegetRequiredContextItemType()
Get the required type of the context item.
StaticQueryContextgetUnderlyingStaticContext()
Get the underlying StaticQueryContext object that maintains the static context information on behalf of this XQueryCompiler.
booleanisCompileWithTracing()
Ask whether trace hooks are included in the compiled code.
booleanisSchemaAware()
Ask whether schema-awareness has been requested either by means of a call on
booleanisUpdatingEnabled()
Ask whether the query is allowed to use XQuery Update syntax
voidsetBaseURI(URI baseURI)
Set the static base URI for the query
voidsetCompileWithTracing(boolean option)
Set whether trace hooks are to be included in the compiled code.
voidsetEncoding(String encoding)
Set the encoding of the supplied query.
voidsetErrorListener(ErrorListener listener)
Set the ErrorListener to be used during this query compilation episode
voidsetLanguageVersion(String version)
Say whether an XQuery 1.0 or XQuery 1.1 processor is required.
voidsetModuleURIResolver(ModuleURIResolver resolver)
Set a user-defined ModuleURIResolver for resolving URIs used in import module declarations in the XQuery prolog.
voidsetRequiredContextItemType(ItemType type)
Declare the static type of the context item.
voidsetSchemaAware(boolean schemaAware)
Say that the query must be compiled to be schema-aware, even if it contains no "import schema" declarations.
voidsetUpdatingEnabled(boolean updating)
Say whether the query is allowed to be updating.

Constructor Detail

XQueryCompiler

protected XQueryCompiler(Processor processor)
Protected constructor

Parameters: processor the Saxon Processor

Method Detail

compile

public XQueryExecutable compile(String query)
Compile a query supplied as a string.

The base URI of the query should be supplied by calling setBaseURI

Parameters: query the text of the query

Returns: an XQueryExecutable representing the compiled query

Throws: SaxonApiException if the query compilation fails with a static error

Since: 9.0

compile

public XQueryExecutable compile(File query)
Compile a query supplied as a file

Parameters: query the file containing the query. The URI corresponding to this file will be used as the base URI of the query, overriding any URI supplied using setBaseURI (but not overriding any base URI specified within the query prolog)

Returns: an XQueryExecutable representing the compiled query

Throws: SaxonApiException if the query compilation fails with a static error IOException if the file does not exist or cannot be read

Since: 9.1

compile

public XQueryExecutable compile(InputStream query)
Compile a query supplied as an InputStream

The base URI of the query should be supplied by calling setBaseURI

Parameters: query the input stream on which the query is supplied. This will be consumed by this method

Returns: an XQueryExecutable representing the compiled query

Throws: SaxonApiException if the query compilation fails with a static error IOException if the file does not exist or cannot be read

Since: 9.1

compile

public XQueryExecutable compile(Reader query)
Compile a query supplied as a Reader

The base URI of the query should be supplied by calling setBaseURI

Parameters: query the input stream on which the query is supplied. This will be consumed by this method

Returns: an XQueryExecutable representing the compiled query

Throws: SaxonApiException if the query compilation fails with a static error IOException if the file does not exist or cannot be read

Since: 9.1

compileLibrary

public void compileLibrary(String query)
Compile a library module supplied as a string. The code generated by compiling the library is available for importing by all subsequent compilations using the same XQueryCompiler; it is identified by an "import module" declaration that specifies the module URI of the library module. No module location hint is required, and if one is present, it is ignored.

The base URI of the query should be supplied by calling setBaseURI

Separate compilation of library modules is supported only under Saxon-EE

Parameters: query the text of the query

Throws: SaxonApiException if the query compilation fails with a static error

Since: 9.2

compileLibrary

public void compileLibrary(File query)
Compile a library module supplied as a file. The code generated by compiling the library is available for importing by all subsequent compilations using the same XQueryCompiler; it is identified by an "import module" declaration that specifies the module URI of the library module. No module location hint is required, and if one is present, it is ignored.

The encoding of the input stream may be specified using setEncoding

Separate compilation of library modules is supported only under Saxon-EE

Parameters: query the file containing the query. The URI corresponding to this file will be used as the base URI of the query, overriding any URI supplied using setBaseURI (but not overriding any base URI specified within the query prolog)

Throws: SaxonApiException if the query compilation fails with a static error IOException if the file does not exist or cannot be read

Since: 9.2

compileLibrary

public void compileLibrary(Reader query)
Compile a library module supplied as a Reader. The code generated by compiling the library is available for importing by all subsequent compilations using the same XQueryCompiler; it is identified by an "import module" declaration that specifies the module URI of the library module. No module location hint is required, and if one is present, it is ignored.

The base URI of the query should be supplied by calling setBaseURI

Separate compilation of library modules is supported only under Saxon-EE

Parameters: query the text of the query

Throws: SaxonApiException if the query compilation fails with a static error

Since: 9.2

compileLibrary

public void compileLibrary(InputStream query)
Compile a library module supplied as an InputStream. The code generated by compiling the library is available for importing by all subsequent compilations using the same XQueryCompiler; it is identified by an "import module" declaration that specifies the module URI of the library module. No module location hint is required, and if one is present, it is ignored.

The encoding of the input stream may be specified using setEncoding

The base URI of the query should be supplied by calling setBaseURI

Separate compilation of library modules is supported only under Saxon-EE

Parameters: query the text of the query

Throws: SaxonApiException if the query compilation fails with a static error

Since: 9.2

declareNamespace

public void declareNamespace(String prefix, String uri)
Declare a namespace binding as part of the static context for queries compiled using this XQueryCompiler. This binding may be overridden by a binding that appears in the query prolog. The namespace binding will form part of the static context of the query, but it will not be copied into result trees unless the prefix is actually used in an element or attribute name.

Parameters: prefix The namespace prefix. If the value is a zero-length string, this method sets the default namespace for elements and types. uri The namespace URI. It is possible to specify a zero-length string to "undeclare" a namespace; in this case the prefix will not be available for use, except in the case where the prefix is also a zero length string, in which case the absence of a prefix implies that the name is in no namespace.

Throws: NullPointerException if either the prefix or uri is null. IllegalArgumentException in the event of an invalid declaration of the XML namespace

getBaseURI

public URI getBaseURI()
Get the static base URI for the query

Returns: the static base URI

getEncoding

public String getEncoding()
Get the encoding previously set for the supplied query.

Returns: the encoding previously set using setEncoding, or null if no value has been set. Note that this is not necessarily the actual encoding of the query.

Since: 9.2

getErrorListener

public ErrorListener getErrorListener()
Get the ErrorListener being used during this compilation episode

Returns: listener The error listener in use. This is notified of all errors detected during the compilation. If no user-supplied ErrorListener has been set, returns the system-supplied ErrorListener.

getLanguageVersion

public String getLanguageVersion()
Ask whether an XQuery 1.0 or XQuery 1.1 processor is being used

Returns: version: "1.0" or "1.1"

Since: 9.2

getModuleURIResolver

public ModuleURIResolver getModuleURIResolver()
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 here or in the Saxon Configuration.

Returns: the registered ModuleURIResolver

getRequiredContextItemType

public ItemType getRequiredContextItemType()
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.

Returns: the required type of the context item

getUnderlyingStaticContext

public StaticQueryContext getUnderlyingStaticContext()
Get the underlying StaticQueryContext object that maintains the static context information on behalf of this XQueryCompiler. This method provides an escape hatch to internal Saxon implementation objects that offer a finer and lower-level degree of control than the s9api classes and methods. Some of these classes and methods may change from release to release.

Returns: the underlying StaticQueryContext object

Since: 9.2

isCompileWithTracing

public boolean isCompileWithTracing()
Ask whether trace hooks are included in the compiled code.

Returns: true if trace hooks are included, false if not.

isSchemaAware

public boolean isSchemaAware()
Ask whether schema-awareness has been requested either by means of a call on XQueryCompiler

Returns: true if schema-awareness has been requested

Since: 9.2

isUpdatingEnabled

public boolean isUpdatingEnabled()
Ask whether the query is allowed to use XQuery Update syntax

Returns: 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

setBaseURI

public void setBaseURI(URI baseURI)
Set the static base URI for the query

Parameters: baseURI the static base URI

setCompileWithTracing

public void setCompileWithTracing(boolean option)
Set whether trace hooks are to be included in the compiled code. To use tracing, it is necessary both to compile the code with trace hooks included, and to supply a TraceListener at run-time

Parameters: option true if trace code is to be compiled in, false otherwise

setEncoding

public void setEncoding(String encoding)
Set the encoding of the supplied query. This is ignored if the query is supplied in character form, that is, as a String or as a Reader. If no value is set, the query processor will attempt to infer the encoding, defaulting to UTF-8 if no information is available.

Parameters: encoding the encoding of the supplied query, for example "iso-8859-1"

Since: 9.1

setErrorListener

public void setErrorListener(ErrorListener listener)
Set the ErrorListener to be used during this query compilation episode

Parameters: listener The error listener to be used. This is notified of all errors detected during the compilation.

setLanguageVersion

public void setLanguageVersion(String version)
Say whether an XQuery 1.0 or XQuery 1.1 processor is required.

Parameters: version Must be "1.0" or "1.1". At present very limited support for XQuery 1.1 is available. This functionality is available only in Saxon-EE, and it cannot be used in conjunction with XQuery Updates. To use XQuery 1.1 features, the query prolog must also specify version="1.1".

Throws: IllegalArgumentException if the version is not 1.0 or 1.1.

Since: 9.2

setModuleURIResolver

public void setModuleURIResolver(ModuleURIResolver resolver)
Set a user-defined ModuleURIResolver for resolving URIs used in import module declarations in the XQuery prolog. This will override any ModuleURIResolver that was specified as part of the configuration.

Parameters: resolver the ModuleURIResolver to be used

setRequiredContextItemType

public void setRequiredContextItemType(ItemType type)
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).

Parameters: type the required type of the context item

setSchemaAware

public void setSchemaAware(boolean schemaAware)
Say that the query must be compiled to be schema-aware, even if it contains no "import schema" declarations. Normally a query is treated as schema-aware only if it contains one or more "import schema" declarations. If it is not schema-aware, then all input documents must be untyped (or xs:anyType), and validation of temporary nodes is disallowed (though validation of the final result tree is permitted). Setting the argument to true means that schema-aware code will be compiled regardless.

Parameters: schemaAware If true, the stylesheet will be compiled with schema-awareness enabled even if it contains no xsl:import-schema declarations. If false, the stylesheet is treated as schema-aware only if it contains one or more xsl:import-schema declarations.

Since: 9.2

setUpdatingEnabled

public void setUpdatingEnabled(boolean updating)
Say whether the query is allowed to be updating. XQuery update syntax will be rejected during query compilation unless this flag is set. XQuery Update is supported only under Saxon-EE.

Parameters: 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