net.sf.saxon.s9api

Class XQueryCompiler

java.lang.Object

net.sf.saxon.s9api.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.newXQueryCompiler().

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

Constructors

Modifier	Constructor and Description
protected	XQueryCompiler(Processor processor) Protected constructor

Method Summary

Methods

Modifier and Type	Method and Description
XQueryExecutable	compile(File query) Compile a query supplied as a file
XQueryExecutable	compile(InputStream query) Compile a query supplied as an InputStream
XQueryExecutable	compile(Reader query) Compile a query supplied as a Reader
XQueryExecutable	compile(String query) Compile a query supplied as a string.
void	compileLibrary(File query) Compile a library module supplied as a file.
void	compileLibrary(InputStream query) Compile a library module supplied as an InputStream.
void	compileLibrary(Reader query) Compile a library module supplied as a Reader.
void	compileLibrary(String query) Compile a library module supplied as a string.
void	declareCollation(String uri, Collator collation) Deprecated. since 9.6. Collations are now held globally. If this method is called, the effect is to update the pool of collations held globally by the Processor.
void	declareDefaultCollation(String uri) Declare the default collation
void	declareNamespace(String prefix, String uri) Declare a namespace binding as part of the static context for queries compiled using this XQueryCompiler.
URI	getBaseURI() Get the static base URI for the query
String	getEncoding() Get the encoding previously set for the supplied query.
ErrorListener	getErrorListener() Get the ErrorListener being used during this compilation episode
String	getLanguageVersion() Ask whether an XQuery 1.0 or XQuery 3.0 processor is being used
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.
Processor	getProcessor() Get the Processor from which this XQueryCompiler was constructed
ItemType	getRequiredContextItemType() Get the required type of the context item.
StaticQueryContext	getUnderlyingStaticContext() Get the underlying StaticQueryContext object that maintains the static context information on behalf of this XQueryCompiler.
boolean	isCompileWithTracing() Ask whether trace hooks are included in the compiled code.
boolean	isSchemaAware() Ask whether schema-awareness has been requested either by means of a call on setSchemaAware(boolean)
boolean	isStreaming() 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.
boolean	isUpdatingEnabled() Ask whether the query is allowed to use XQuery Update syntax
void	setBaseURI(URI baseURI) Set the static base URI for the query
void	setCompileWithTracing(boolean option) Set whether trace hooks are to be included in the compiled code.
void	setEncoding(String encoding) Set the encoding of the supplied query.
void	setErrorList(List<StaticError> errorList) List of errors.
void	setErrorListener(ErrorListener listener) Set the ErrorListener to be used during this query compilation episode
void	setLanguageVersion(String value) Say whether an XQuery 1.0 or XQuery 3.0 processor is required.
void	setModuleURIResolver(ModuleURIResolver resolver) Set a user-defined ModuleURIResolver for resolving URIs used in import module declarations in the XQuery prolog.
void	setRequiredContextItemType(ItemType type) Declare the static type of the context item.
void	setSchemaAware(boolean schemaAware) Say that the query must be compiled to be schema-aware, even if it contains no "import schema" declarations.
void	setStreaming(boolean option) Say whether the query should be compiled and evaluated to use streaming.
void	setUpdatingEnabled(boolean updating) Say whether the query is allowed to be updating.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

XQueryCompiler

protected XQueryCompiler(Processor processor)

Protected constructor

Parameters:

processor - the Saxon Processor

Method Detail

getProcessor

public Processor getProcessor()

Get the Processor from which this XQueryCompiler was constructed

Returns:

the Processor to which this XQueryCompiler belongs

Since:

9.3

setBaseURI

public void setBaseURI(URI baseURI)

Set the static base URI for the query

Parameters:

baseURI - the static base URI; or null to indicate that no base URI is available

getBaseURI

public URI getBaseURI()

Get the static base URI for the query

Returns:

the static base URI

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. Static errors (as defined in the XQuery specification) are notified to the ErrorListener.fatalError(javax.xml.transform.TransformerException) method. Warnings are notified to the ErrorListener.warning(javax.xml.transform.TransformerException). Any exception thrown by these methods is ignored.

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.

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

isCompileWithTracing

public boolean isCompileWithTracing()

Ask whether trace hooks are included in the compiled code.

Returns:

true if trace hooks are included, false if not.

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

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

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

getEncoding

public String getEncoding()

Get the encoding previously set for the supplied query.

Returns:

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

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.

Throws:

UnsupportedOperationException - if updating is requested and the Saxon Configuration does not support updating, either because it is not an EnterpriseConfiguration, or because no license key is available.

Since:

9.1

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, then it must definitely be non-updating.

Since:

9.1

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. Note that setting the value to false does not disable use of an import-schema declaration.

Since:

9.2

isSchemaAware

public boolean isSchemaAware()

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

Returns:

true if schema-awareness has been requested

Since:

9.2

setStreaming

public void setStreaming(boolean option)

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.

Parameters:

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.

When setStreaming(true) is specified, this has the additional side-effect of setting the required context item type to "document-node()"

Since:

9.6

isStreaming

public boolean isStreaming()

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.

Returns:

true if the streaming option has been set.

Since:

9.6

setLanguageVersion

public void setLanguageVersion(String value)

Say whether an XQuery 1.0 or XQuery 3.0 processor is required.

Parameters:

value - Must be "1.0" or "3.0". The value "3.1" is currently accepted as a synonym for "3.0".

Throws:

IllegalArgumentException - if the version is not 1.0 or 3.0.

Since:

9.2. The handling of different XQuery version numbers has changed in successive Saxon releases.

getLanguageVersion

public String getLanguageVersion()

Ask whether an XQuery 1.0 or XQuery 3.0 processor is being used

Returns:

version: "1.0" or "3.0"

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

declareCollation

public void declareCollation(String uri,
                    Collator collation)

Deprecated. since 9.6. Collations are now held globally. If this method is called, the effect is to update the pool of collations held globally by the Processor.

Bind a collation URI to a collation

Parameters:

uri - the absolute collation URI

collation - a Collator object that implements the required collation

Throws:

IllegalArgumentException - if an attempt is made to rebind the standard URI for the Unicode codepoint collation

Since:

9.4

declareDefaultCollation

public void declareDefaultCollation(String uri)

Declare the default collation

Parameters:

uri - the absolute URI of the default collation. This URI must have been bound to a collation using the method declareCollation(String, java.text.Collator), or it must be one that is recognized implicitly, such as a UCA collation

Throws:

IllegalStateException - if the collation URI has not been registered, unless it is the standard Unicode codepoint collation which is registered implicitly

Since:

9.4

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

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

compileLibrary

public void compileLibrary(String query)
                    throws SaxonApiException

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(java.net.URI)

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)
                    throws SaxonApiException,
                           IOException

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(String); if this has not been set, the compiler determines the encoding from the version header of the query, and if that too is absent, it assumes UTF-8.

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(java.net.URI) (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)
                    throws SaxonApiException

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(java.net.URI)

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)
                    throws SaxonApiException

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(String); if this has not been set, the compiler determines the encoding from the version header of the query, and if that too is absent, it assumes UTF-8.

The base URI of the query should be supplied by calling setBaseURI(java.net.URI)

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

compile

public XQueryExecutable compile(String query)
                         throws SaxonApiException

Compile a query supplied as a string.

The base URI of the query should be supplied by calling setBaseURI(java.net.URI)

If the query contains static errors, these will be notified to the registered ErrorListener. More than one static error may be reported. If any static errors have been reported, this method will exit with an exception, but the exception will only contain a summary message. The default ErrorListener writes details of each error to the System.err output stream.

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)
                         throws SaxonApiException,
                                IOException

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(java.net.URI) (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)
                         throws SaxonApiException,
                                IOException

Compile a query supplied as an InputStream

The base URI of the query should be supplied by calling setBaseURI(java.net.URI)

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)
                         throws SaxonApiException,
                                IOException

Compile a query supplied as a Reader

The base URI of the query should be supplied by calling setBaseURI(java.net.URI)

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

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

setErrorList

public void setErrorList(List<StaticError> errorList)

List of errors. The caller should supply an empty list before calling Compile; the processor will then populate the list with error information obtained during the compilation. Each error will be included as an object of type StaticError. If no error list is supplied by the caller, error information will be written to the standard error stream. By supplying a custom List with a user-written add() method, it is possible to intercept error conditions as they occur.

Parameters:

errorList -