org.drools.lang.dsl.DSLMapWalker.g Maven / Gradle / Ivy

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There is a newer version: 10.0.0
tree grammar DSLMapWalker;

options {
    tokenVocab=DSLMap;
    ASTLabelType=CommonTree;
}

@treeparser::header {
    package org.drools.lang.dsl;

    import java.util.Map;
    import java.util.HashMap;
}


mapping_file returns [DSLMapping mapping]
scope {
    DSLMapping retval;
}
@init {
    $mapping_file::retval = new DefaultDSLMapping() ;
}
    : ^(VT_DSL_GRAMMAR valid_entry*)
    {
        $mapping = $mapping_file::retval;
    }
    ;

valid_entry returns [DSLMappingEntry mappingEntry]
    : ent=entry {$mappingEntry = ent; }
    ;


entry returns [DSLMappingEntry mappingEntry]
scope {
    Map variables;
    AntlrDSLMappingEntry retval;
    StringBuilder keybuffer;
    StringBuilder valuebuffer;
    StringBuilder sentenceKeyBuffer;
    StringBuilder sentenceValueBuffer;
}
@init {
    $entry::retval = new AntlrDSLMappingEntry() ;
    $entry::variables = new HashMap();
    $entry::keybuffer = new StringBuilder();
    $entry::valuebuffer = new StringBuilder();
    $entry::sentenceKeyBuffer = new StringBuilder();
    $entry::sentenceValueBuffer = new StringBuilder();
}
    : ^(VT_ENTRY scope_section meta_section? key_section
            {    $entry::retval.setVariables( $entry::variables );
                 $entry::retval.setMappingKey($entry::sentenceKeyBuffer.toString());
                 $entry::retval.setKeyPattern($entry::keybuffer.toString());
            }
        value_section?)
    {
        $entry::retval.setMappingValue($entry::sentenceValueBuffer.toString());
        $entry::retval.setValuePattern($entry::valuebuffer.toString());
        $mappingEntry = $entry::retval;
        $mapping_file::retval.addEntry($mappingEntry);
    }
    ;


scope_section 
    : ^(thescope=VT_SCOPE condition_key? consequence_key? keyword_key? any_key?)
    ;



meta_section
    : ^(VT_META metalit=LITERAL?)
    {
        if ( $metalit == null || $metalit.text == null || $metalit.text.length() == 0 ) {
            $entry::retval.setMetaData(DSLMappingEntry.EMPTY_METADATA);
        } else {
                $entry::retval.setMetaData(new DSLMappingEntry.DefaultDSLEntryMetaData( $metalit.text ));
            }
    }
    ;

key_section
    : ^(VT_ENTRY_KEY key_sentence+ )
    ;
 
key_sentence
    : variable_definition
    | vtl=VT_LITERAL
    {
        $entry::keybuffer.append($vtl.text);
        $entry::sentenceKeyBuffer.append($vtl.text);
    }
    | VT_SPACE
    {
        $entry::keybuffer.append("\\s+");
        $entry::sentenceKeyBuffer.append(" ");
    }
    ;

value_section
@after{
    $entry::valuebuffer.append(" ");
}
    : ^(VT_ENTRY_VAL value_sentence+ )
    ;

value_sentence 	
    : variable_reference
    | vtl=VT_LITERAL
    {
        $entry::valuebuffer.append($vtl.text);
        $entry::sentenceValueBuffer.append($vtl.text);
    }
    | VT_SPACE
    {
        $entry::valuebuffer.append(" ");
        $entry::sentenceValueBuffer.append(" ");
    }
    ;

literal 
    : theliteral=VT_LITERAL
    ;

variable_definition
    :   ^(VT_VAR_DEF varname=LITERAL ^(VT_QUAL q=LITERAL?) pattern=VT_PATTERN? )
    {
        $entry::variables.put($varname.text, Integer.valueOf(0));

        if($q!=null && $pattern!=null){
            $entry::sentenceKeyBuffer.append("{"+$varname.text+":"+$q.text+":"+$pattern.text+"}");
        }else if($q==null && $pattern!=null){
            $entry::sentenceKeyBuffer.append("{"+$varname.text+":"+$pattern.text+"}");
        }else{
            $entry::sentenceKeyBuffer.append("{"+$varname.text+"}");
        }

        if($q == null || (!$q.getText().equals("ENUM") && !$q.getText().equals("CF") && 
                          !$q.getText().equals("DATE") && !$q.getText().equals("BOOLEAN"))){
            $entry::keybuffer.append($pattern != null? "(" + $pattern.text + ")" : "(.*?)");
        }else{
            $entry::keybuffer.append("(.*?)");
        }
    }
    ;


variable_reference 
    : ^(varref=VT_VAR_REF lit=LITERAL )
    {
        $entry::valuebuffer.append("{" + $lit.text + "}" );
         $entry::sentenceValueBuffer.append("{"+$lit.text+"}");
    }
    ;

condition_key
    : VT_CONDITION
    {$entry::retval.setSection(DSLMappingEntry.CONDITION);}
    ;

consequence_key 
    : VT_CONSEQUENCE
    {$entry::retval.setSection(DSLMappingEntry.CONSEQUENCE);}
    ;

keyword_key 
    : VT_KEYWORD
    {$entry::retval.setSection(DSLMappingEntry.KEYWORD);}
    ;

any_key 
    : VT_ANY
    {$entry::retval.setSection(DSLMappingEntry.ANY);}
    ;