Package net.sf.saxon

Class Query

java.lang.Object

net.sf.saxon.Query

Direct Known Subclasses:

JDOM2Query, JDOMQuery

public class Query
extends Object

This Query class provides a command-line interface to the Saxon XQuery processor.

The XQuery syntax supported conforms to the W3C XQuery 1.0 drafts.

Author:

Michael H. Kay

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	backup
protected Configuration	config
protected boolean	explain
protected String	explainOutputFileName
protected String	moduleURIResolverClass
protected String	outputFileName
protected Processor	processor
protected boolean	projection
protected String	queryFileName
protected int	repeat
protected boolean	showTime
protected String	sourceFileName
protected boolean	streaming
protected boolean	updating
protected String	uriResolverClass
protected boolean	useURLs
protected boolean	wrap
protected boolean	writeback

Constructor Summary

Constructors

Constructor	Description
Query()

Method Summary

Modifier and Type	Method	Description
protected void	applyLocalOptions(CommandLineOptions options, Configuration config)	Customisation hook: apply options defined locally in a subclass
protected void	badUsage(String message)	Report incorrect usage of the command line, with a list of the options and arguments that are available
protected XQueryExecutable	compileQuery(XQueryCompiler compiler, String queryFileName, boolean useURLs)	Compile the query
static void	createFileIfNecessary(File file)	Utility method to create a file if it does not already exist, including creation of any necessary directories named in the file path
protected void	doQuery(String[] args, String command)	Support method for main program.
protected void	explain(XQueryExpression exp)	Explain the results of query compilation
protected Configuration	getConfiguration()	Get the configuration in use
static void	main(String[] args)	Main program, can be used directly from the command line.
protected void	parseOptions(CommandLineOptions options)	Parse the options supplied on the command line
protected void	processSource(Source sourceInput, XQueryExecutable exp, XQueryEvaluator evaluator)	Process the supplied source file
protected Source	processSourceFile(String sourceFileName, boolean useURLs)
protected void	quit(String message, int code)	Exit with a message
protected void	runQuery(XQueryExecutable exp, XQueryEvaluator evaluator, Source input, Destination destination)	Run the query
protected void	runUpdate(XQueryExecutable exp, XQueryEvaluator evaluator, Serializer serializer)	Run an updating query
void	setPermittedOptions(CommandLineOptions options)	Set the options that are recognized on the command line.

Methods inherited from class java.lang.Object

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

Field Detail

processor

protected Processor processor

config

protected Configuration config

showTime

protected boolean showTime

repeat

protected int repeat

sourceFileName

protected String sourceFileName

queryFileName

protected String queryFileName

useURLs

protected boolean useURLs

outputFileName

protected String outputFileName

moduleURIResolverClass

protected String moduleURIResolverClass

uriResolverClass

protected final String uriResolverClass

explain

protected boolean explain

wrap

protected boolean wrap

projection

protected boolean projection

streaming

protected boolean streaming

updating

protected boolean updating

writeback

protected boolean writeback

backup

protected boolean backup

explainOutputFileName

protected String explainOutputFileName

Constructor Detail

Query

public Query()

Method Detail

getConfiguration

protected Configuration getConfiguration()

Get the configuration in use

Returns:

the configuration

main

public static void main(String[] args)

Main program, can be used directly from the command line.

The format is:

java net.sf.saxon.Query [options] query-file >output-file

followed by any number of parameters in the form {keyword=value}... which can be referenced from within the query.

This program executes the query in query-file.

Parameters:

args - List of arguments supplied on operating system command line

setPermittedOptions

public void setPermittedOptions(CommandLineOptions options)

Set the options that are recognized on the command line. This method can be overridden in a subclass to define additional command line options.

Parameters:

options - the CommandLineOptions in which the recognized options are to be registered.

doQuery

protected void doQuery(String[] args,
                       String command)

Support method for main program. This support method can also be invoked from subclasses that support the same command line interface

Parameters:

args - the command-line arguments

command - name of the class, to be used in error messages

parseOptions

protected void parseOptions(CommandLineOptions options)
                     throws TransformerException

Parse the options supplied on the command line

Parameters:

options - the command line arguments

Throws:

TransformerException - if failures occur. Note, the method may also invoke System.exit().

applyLocalOptions

protected void applyLocalOptions(CommandLineOptions options,
                                 Configuration config)

Customisation hook: apply options defined locally in a subclass

Parameters:

options - the CommandLineOptions

config - the Saxon Configuration

processSourceFile

protected Source processSourceFile(String sourceFileName,
                                   boolean useURLs)
                            throws TransformerException

Throws:

TransformerException

compileQuery

protected XQueryExecutable compileQuery(XQueryCompiler compiler,
                                        String queryFileName,
                                        boolean useURLs)
                                 throws SaxonApiException,
                                        IOException

Compile the query

Parameters:

compiler - the XQuery compiler

queryFileName - the filename holding the query (or "-" for the standard input)

useURLs - true if the filename is in the form of a URI

Returns:

the compiled query

Throws:

SaxonApiException - if query compilation fails

IOException - if the query cannot be read

explain

protected void explain(XQueryExpression exp)
                throws FileNotFoundException,
                       XPathException

Explain the results of query compilation

Parameters:

exp - the compiled expression

Throws:

FileNotFoundException - if the destination for the explanation doesn't exist

XPathException - if other failures occur

processSource

protected void processSource(Source sourceInput,
                             XQueryExecutable exp,
                             XQueryEvaluator evaluator)
                      throws SaxonApiException

Process the supplied source file

Parameters:

sourceInput - the supplied source

exp - the compiled XQuery expression

evaluator - the dynamic query context

Throws:

SaxonApiException - if processing fails

runQuery

protected void runQuery(XQueryExecutable exp,
                        XQueryEvaluator evaluator,
                        Source input,
                        Destination destination)
                 throws SaxonApiException

Run the query

Parameters:

exp - the compiled query expression

evaluator - the dynamic query context

input - the supplied source

destination - the destination for serialized results

Throws:

SaxonApiException - if the query fails

runUpdate

protected void runUpdate(XQueryExecutable exp,
                         XQueryEvaluator evaluator,
                         Serializer serializer)
                  throws SaxonApiException

Run an updating query

Parameters:

exp - the compiled query expression

evaluator - the query evaluator

serializer - the destination for serialized results

Throws:

SaxonApiException - if the query fails

quit

protected void quit(String message,
                    int code)

Exit with a message

Parameters:

message - The message to be output

code - The result code to be returned to the operating system shell

badUsage

protected void badUsage(String message)

Report incorrect usage of the command line, with a list of the options and arguments that are available

Parameters:

message - The error message

createFileIfNecessary

public static void createFileIfNecessary(File file)
                                  throws IOException

Utility method to create a file if it does not already exist, including creation of any necessary directories named in the file path

Parameters:

file - the file that is required to exist

Throws:

IOException - if file creation fails