net.sf.saxon
Class Query

java.lang.Object
  net.sf.saxon.Query

Direct Known Subclasses:

JDOMQuery, Query

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

protected boolean	backup
protected Configuration	config
protected boolean	explain
protected String	explainOutputFileName
protected String	languageVersion
protected String	moduleURIResolverClass
protected String	outputFileName
protected Properties	outputProperties
protected boolean	projection
protected boolean	pullMode
protected String	queryFileName
protected int	repeat
protected boolean	showTime
protected String	sourceFileName
protected boolean	updating
protected String	uriResolverClass
protected boolean	useURLs
protected boolean	wrap
protected boolean	writeback

Constructor Summary

Query()

Method Summary

protected void	badUsage(String name, String message) Report incorrect usage of the command line, with a list of the options and arguments that are available
protected XQueryExpression	compileQuery(StaticQueryContext staticEnv, String queryFileName, boolean useURLs) Compile the query
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
protected static void	loadAdditionalSchemas(Configuration config, String additionalSchemas)
static void	main(String[] args) Main program, can be used directly from the command line.
protected void	parseOptions(String[] args, String command, StaticQueryContext staticEnv, DynamicQueryContext dynamicEnv) Parse the options supplied on the command line
protected void	processSource(Source sourceInput, XQueryExpression exp, DynamicQueryContext dynamicEnv) Process the supplied source file
protected Source	processSourceFile(String sourceFileName, boolean useURLs)
protected static void	quit(String message, int code) Exit with a message
protected void	runQuery(XQueryExpression exp, DynamicQueryContext dynamicEnv, OutputStream destination, Properties outputProps) Run the query
protected boolean	testIfSchemaAware(String[] args) Prescan the command line arguments to see if any of them imply use of a schema-aware processor

Methods inherited from class java.lang.Object

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

Field Detail

config

protected Configuration config

outputProperties

protected Properties outputProperties

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 String uriResolverClass

explain

protected boolean explain

wrap

protected boolean wrap

pullMode

protected boolean pullMode

projection

protected boolean projection

languageVersion

protected String languageVersion

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)
                 throws Exception

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

Throws:

Exception - Indicates that a compile-time or run-time error occurred

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

testIfSchemaAware

protected boolean testIfSchemaAware(String[] args)

Prescan the command line arguments to see if any of them imply use of a schema-aware processor

Parameters:

args - the command line arguments

Returns:

true if a schema-aware processor is needed

parseOptions

protected void parseOptions(String[] args,
                            String command,
                            StaticQueryContext staticEnv,
                            DynamicQueryContext dynamicEnv)
                     throws TransformerException

Parse the options supplied on the command line

Parameters:

args - the command line arguments

command - the name of the command that was used (for diagnostics only)

dynamicEnv - the XQuery dynamic context

Throws:

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

loadAdditionalSchemas

protected static void loadAdditionalSchemas(Configuration config,
                                            String additionalSchemas)
                                     throws TransformerException

Throws:

TransformerException

processSourceFile

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

Throws:

TransformerException

compileQuery

protected XQueryExpression compileQuery(StaticQueryContext staticEnv,
                                        String queryFileName,
                                        boolean useURLs)
                                 throws XPathException,
                                        IOException

Compile the query

Parameters:

staticEnv - the static query context

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:

XPathException - 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,
                             XQueryExpression exp,
                             DynamicQueryContext dynamicEnv)
                      throws XPathException

Process the supplied source file

Parameters:

sourceInput - the supplied source

exp - the compiled XQuery expression

dynamicEnv - the dynamic query context

Throws:

XPathException - if processing fails

runQuery

protected void runQuery(XQueryExpression exp,
                        DynamicQueryContext dynamicEnv,
                        OutputStream destination,
                        Properties outputProps)
                 throws XPathException,
                        IOException

Run the query

Parameters:

exp - the compiled query expression

dynamicEnv - the dynamic query context

destination - the destination for serialized results

outputProps - serialization properties defining the output format

Throws:

XPathException - if the query fails

IOException - if input or output fails

quit

protected static 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 name,
                        String message)

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

Parameters:

name - The name of the command being executed (allows subclassing)

message - The error message