org.drools.compiler.lang.dsl
Class DefaultExpander

java.lang.Object
  org.drools.compiler.lang.dsl.DefaultExpander

All Implemented Interfaces:

Expander

public class DefaultExpander
extends Object
implements Expander

The default expander uses String templates to provide pseudo natural language, as well as general DSLs. For most people, this should do the job just fine.

Field Summary

protected static org.slf4j.Logger

logger

Constructor Summary

DefaultExpander()
Creates a new DefaultExpander

Method Summary

void	addDSLMapping(DSLMapping mapping) Add the new mapping to this expander.
String	expand(Reader drlReader) Expands (process) the expression Just-In-Time for the parser.
String	expand(String drl) Expands (process) the expression Just-In-Time for the parser.
List<ExpanderException>	getErrors() Returns the list of errors from the last expansion made
boolean	hasErrors() Returns true in case the last expansion had any errors

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final transient org.slf4j.Logger logger

Constructor Detail

DefaultExpander

public DefaultExpander()

Creates a new DefaultExpander

Method Detail

addDSLMapping

public void addDSLMapping(DSLMapping mapping)

Add the new mapping to this expander.

Specified by:

addDSLMapping in interface Expander

Parameters:

mapping -

expand

public String expand(Reader drlReader)
              throws IOException

Description copied from interface: Expander

Expands (process) the expression Just-In-Time for the parser. If the source is not meant to be expanded, or if no appropriate match was found for expansion, it will echo back the same expression.

Specified by:

expand in interface Expander

Parameters:

drlReader - the source code to be pre-processed

Returns:

source code after running pre-processors

Throws:

IOException

expand

public String expand(String drl)

Description copied from interface: Expander

Expands (process) the expression Just-In-Time for the parser. If the source is not meant to be expanded, or if no appropriate match was found for expansion, it will echo back the same expression.

Specified by:

expand in interface Expander

Parameters:

drl - the source code to be expanded

Returns:

source code after running pre-processors

Throws:

IOException

getErrors

public List<ExpanderException> getErrors()

Description copied from interface: Expander

Returns the list of errors from the last expansion made

Specified by:

getErrors in interface Expander

Returns:

A list of ExpanderException

hasErrors

public boolean hasErrors()

Description copied from interface: Expander

Returns true in case the last expansion had any errors

Specified by:

hasErrors in interface Expander

Returns: