Package org.drools.drl.parser

Class DrlParser

java.lang.Object

org.drools.drl.parser.DrlParser

public class DrlParser
extends Object

This is a low level parser API. This will return textual AST representations of the DRL source, including with DSL expanders if appropriate.

Field Summary

Fields

Modifier and Type	Field	Description
static final LanguageLevelOption	DEFAULT_LANGUAGE_LEVEL

Constructor Summary

Constructors

Constructor	Description
DrlParser()
DrlParser(LanguageLevelOption languageLevel)

Method Summary

Modifier and Type	Method	Description
DefaultExpanderResolver	getDefaultResolver(Reader dsl)
List<DroolsSentence>	getEditorSentences()
List<DroolsError>	getErrors()
String	getExpandedDRL(String source, Reader dsl)	This will expand the DRL.
String	getExpandedDRL(String source, DefaultExpanderResolver resolver)	This will expand the DRL using the given expander resolver.
Location	getLocation()
boolean	hasErrors()
PackageDescr	parse(boolean isEditor, Reader reader)
PackageDescr	parse(boolean isEditor, Reader drl, Reader dsl)
PackageDescr	parse(boolean isEditor, String text)
PackageDescr	parse(boolean isEditor, String source, Reader dsl)	Parse and build a rule package from a DRL source with a domain specific language.
PackageDescr	parse(boolean isEditor, Resource resource)
PackageDescr	parse(boolean isEditor, Resource resource, InputStream is)
PackageDescr	parse(Reader reader)
PackageDescr	parse(Reader drl, Reader dsl)	Parse and build a rule package from a DRL source with a domain specific language.
PackageDescr	parse(String source, Reader dsl)
PackageDescr	parse(Resource resource)
PackageDescr	parse(Resource resource, InputStream is)
PackageDescr	parse(Resource resource, Reader reader)
PackageDescr	parse(Resource resource, String text)	Parse a rule from text

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_LANGUAGE_LEVEL

public static final LanguageLevelOption DEFAULT_LANGUAGE_LEVEL

Constructor Details

DrlParser

public DrlParser()

DrlParser

public DrlParser(LanguageLevelOption languageLevel)

Method Details

parse

public PackageDescr parse(Resource resource,
 String text)
                   throws DroolsParserException

Parse a rule from text

Throws:

DroolsParserException

parse

public PackageDescr parse(boolean isEditor,
 String text)
                   throws DroolsParserException

Throws:

DroolsParserException

parse

public PackageDescr parse(boolean isEditor,
 Reader reader)
                   throws DroolsParserException

Throws:

DroolsParserException

parse

public PackageDescr parse(Resource resource,
 Reader reader)
                   throws DroolsParserException

Throws:

DroolsParserException

parse

public PackageDescr parse(Reader reader)
                   throws DroolsParserException

Throws:

DroolsParserException

parse

public PackageDescr parse(Reader drl,
 Reader dsl)
                   throws DroolsParserException,
IOException

Parse and build a rule package from a DRL source with a domain specific language.

Throws:

DroolsParserException

IOException

parse

public PackageDescr parse(boolean isEditor,
 Reader drl,
 Reader dsl)
                   throws DroolsParserException,
IOException

Throws:

DroolsParserException

IOException

parse

public PackageDescr parse(boolean isEditor,
 String source,
 Reader dsl)
                   throws DroolsParserException

Parse and build a rule package from a DRL source with a domain specific language.

Parameters:

source - As Text.

dsl -

Returns:

Throws:

DroolsParserException

parse

public PackageDescr parse(String source,
 Reader dsl)
                   throws DroolsParserException

Throws:

DroolsParserException

parse

public PackageDescr parse(Resource resource)
                   throws DroolsParserException,
IOException

Throws:

DroolsParserException

IOException

parse

public PackageDescr parse(Resource resource,
 InputStream is)
                   throws DroolsParserException,
IOException

Throws:

DroolsParserException

IOException

parse

public PackageDescr parse(boolean isEditor,
 Resource resource)
                   throws DroolsParserException,
IOException

Throws:

DroolsParserException

IOException

parse

public PackageDescr parse(boolean isEditor,
 Resource resource,
 InputStream is)
                   throws DroolsParserException,
IOException

Throws:

DroolsParserException

IOException

getExpandedDRL

public String getExpandedDRL(String source,
 Reader dsl)
                      throws DroolsParserException

This will expand the DRL. useful for debugging.

Parameters:

source - - the source which use a DSL

dsl - - the DSL itself.

Throws:

DroolsParserException - If unable to expand in any way.

getExpandedDRL

public String getExpandedDRL(String source,
 DefaultExpanderResolver resolver)
                      throws DroolsParserException

This will expand the DRL using the given expander resolver. useful for debugging.

Parameters:

source - - the source which use a DSL

resolver - - the DSL expander resolver itself.

Throws:

DroolsParserException - If unable to expand in any way.

hasErrors

public boolean hasErrors()

Returns:

true if there were parser errors.

getErrors

public List<DroolsError> getErrors()

Returns:

a list of errors found while parsing. DroolsError: either ParserError, or ExpanderException

getLocation

public Location getLocation()

getDefaultResolver

public DefaultExpanderResolver getDefaultResolver(Reader dsl)
                                           throws DroolsParserException

Throws:

DroolsParserException

getEditorSentences

public List<DroolsSentence> getEditorSentences()