Package org.drools.rule

Examples of org.drools.rule.Accumulate

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     * @inheritDoc
     */
    public void build(final BuildContext context,
                      final BuildUtils utils,
                      final RuleConditionElement rce) {
        final Accumulate accumulate = (Accumulate) rce;
        boolean existSubNetwort = false;
        context.pushRuleComponent( accumulate );

        final List resultBetaConstraints = context.getBetaconstraints();
        final List resultAlphaConstraints = context.getAlphaConstraints();
        final List resultBehaviors = context.getBehaviors();

        RuleConditionElement source = accumulate.getSource();
        if( source instanceof GroupElement ) {
            GroupElement ge = (GroupElement) source;
            if( ge.isAnd() && ge.getChildren().size() == 1 ) {
                source = (RuleConditionElement) ge.getChildren().get( 0 );
            }
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                                                      decls,
                                                      sourceOuterDeclr,
                                                      boundIds );
            }

            final Accumulate accumulate = new Accumulate( source,
                                                          null,
                                                          null,
                                                          accumulators,
                                                          isMultiFunction );
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        }

        Map<String, Declaration> declsInScope = context.getDeclarationResolver().getDeclarations( context.getRule() );
        Map<String, Class< ? >> declCls = DeclarationScopeResolver.getDeclarationClasses( declsInScope );

        Accumulate accumulate = null;
        if ( accumDescr.isExternalFunction() ) {
            // if it uses 1+ external function, build methods for them
            accumulate = buildExternalFunctionCall( context,
                                                    accumDescr,
                                                    source,
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    private Accumulate buildExternalFunctionCall( final RuleBuildContext context,
                                                  final AccumulateDescr accumDescr,
                                                  final RuleConditionElement source,
                                                  Map<String, Declaration> declsInScope,
                                                  Map<String, Class< ? >> declCls ) {
        Accumulate accumulate = null;

        // list of functions to build
        final List<AccumulateFunctionCallDescr> funcCalls = accumDescr.getFunctions();
        // list of available source declarations
        final Declaration[] sourceDeclArr = (Declaration[]) source.getOuterDeclarations().values().toArray( new Declaration[0] );

        // the accumulator array
        Accumulator[] accumulators = new Accumulator[funcCalls.size()];

        // set of required previous declarations
        Set<Declaration> requiredDecl = new HashSet<Declaration>();

        // creating the custom array reader
        InternalReadAccessor arrayReader = new SelfReferenceClassFieldReader( Object[].class,
                                                                              "this" );

        int index = 0;
        for ( AccumulateFunctionCallDescr fc : funcCalls ) {
            // find the corresponding function
            AccumulateFunction function = context.getConfiguration().getAccumulateFunction( fc.getFunction() );
            if ( function == null ) {
                context.getErrors().add( new DescrBuildError( accumDescr,
                                                              context.getRuleDescr(),
                                                              null,
                                                              "Unknown accumulate function: '" + fc.getFunction() + "' on rule '" + context.getRuleDescr().getName() + "'. All accumulate functions must be registered before building a resource." ) );
                return null;
            }

            // if there is a binding, create the binding
            if ( fc.getBind() != null ) {
                createResultBind( context,
                                  index,
                                  arrayReader,
                                  fc,
                                  function );
            }

            // analyze the expression
            final JavaAnalysisResult analysis = (JavaAnalysisResult) context.getDialect().analyzeBlock( context,
                                                                                                        accumDescr,
                                                                                                        fc.getParams().length > 0 ? fc.getParams()[0] : "\"\"",
                                                                                                        new BoundIdentifiers( declCls,
                                                                                                                              context.getPackageBuilder().getGlobals() ) );

            final BoundIdentifiers usedIdentifiers = analysis.getBoundIdentifiers();

            // create the array of used declarations
            final Declaration[] previousDeclarations = collectRequiredDeclarations( declsInScope,
                                                                                    requiredDecl,
                                                                                    usedIdentifiers );

            // generate the code template
            accumulators[index++] = generateFunctionCallCodeTemplate( context,
                                                                      accumDescr,
                                                                      sourceDeclArr,
                                                                      fc,
                                                                      function,
                                                                      usedIdentifiers,
                                                                      previousDeclarations );
        }
        boolean isMultiFunction = ((Pattern) context.getBuildStack().peek()).getObjectType().getValueType().equals( ValueType.ARRAY_TYPE ) && funcCalls.size() > 1;
       
        accumulate = new Accumulate( source,
                                     requiredDecl.toArray( new Declaration[requiredDecl.size()] ),
                                     sourceDeclArr,
                                     accumulators,
                                     isMultiFunction );
        return accumulate;
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    private Accumulate buildInlineAccumulate( final RuleBuildContext context,
                                              final AccumulateDescr accumDescr,
                                              final RuleConditionElement source,
                                              Map<String, Declaration> decls,
                                              Map<String, Class< ? >> declCls ) {
        Accumulate accumulate;
        // ELSE, if it is not an external function, build it using the regular java builder
        final String className = "Accumulate" + context.getNextId();
        accumDescr.setClassName( className );

        BoundIdentifiers available = new BoundIdentifiers( declCls,
                                                           context.getPackageBuilder().getGlobals() );

        final JavaAnalysisResult initCodeAnalysis = (JavaAnalysisResult) context.getDialect().analyzeBlock( context,
                                                                                                            accumDescr,
                                                                                                            accumDescr.getInitCode(),
                                                                                                            available );
        final AnalysisResult actionCodeAnalysis = context.getDialect().analyzeBlock( context,
                                                                                     accumDescr,
                                                                                     accumDescr.getActionCode(),
                                                                                     available );

        final AnalysisResult resultCodeAnalysis = context.getDialect().analyzeExpression( context,
                                                                                                  accumDescr,
                                                                                                  accumDescr.getResultCode(),
                                                                                                  available );

        final Set<String> requiredDeclarations = new HashSet<String>( initCodeAnalysis.getBoundIdentifiers().getDeclrClasses().keySet() );
        requiredDeclarations.addAll( actionCodeAnalysis.getBoundIdentifiers().getDeclrClasses().keySet() );
        requiredDeclarations.addAll( resultCodeAnalysis.getBoundIdentifiers().getDeclrClasses().keySet() );

        final Map<String, Class< ? >> requiredGlobals = new HashMap<String, Class< ? >>( initCodeAnalysis.getBoundIdentifiers().getGlobals() );
        requiredGlobals.putAll( actionCodeAnalysis.getBoundIdentifiers().getGlobals() );
        requiredGlobals.putAll( resultCodeAnalysis.getBoundIdentifiers().getGlobals() );

        if ( accumDescr.getReverseCode() != null ) {
            final AnalysisResult reverseCodeAnalysis = context.getDialect().analyzeBlock( context,
                                                                                                  accumDescr,
                                                                                                  accumDescr.getActionCode(),
                                                                                                  available );
            requiredDeclarations.addAll( reverseCodeAnalysis.getBoundIdentifiers().getDeclrClasses().keySet() );
            requiredGlobals.putAll( reverseCodeAnalysis.getBoundIdentifiers().getGlobals() );
        }

        final Declaration[] declarations = new Declaration[requiredDeclarations.size()];
        int i = 0;
        for ( Iterator<String> it = requiredDeclarations.iterator(); it.hasNext(); i++ ) {
            declarations[i] = decls.get( it.next() );
        }
        final Declaration[] sourceDeclArr = (Declaration[]) source.getOuterDeclarations().values().toArray( new Declaration[0] );

        final Map<String, Object> map = createVariableContext( className,
                                                               null,
                                                               context,
                                                               declarations,
                                                               null,
                                                               requiredGlobals,
                                                               null );

        map.put( "className",
                 accumDescr.getClassName() );
        map.put( "innerDeclarations",
                 sourceDeclArr );
        map.put( "isMultiPattern",
                 accumDescr.isMultiPattern() ? Boolean.TRUE : Boolean.FALSE );

        final String initCode = this.fixInitCode( initCodeAnalysis,
                                                  accumDescr.getInitCode() );
        final String actionCode = accumDescr.getActionCode();
        final String resultCode = accumDescr.getResultCode();

        String[] attributesTypes = new String[initCodeAnalysis.getLocalVariablesMap().size()];
        String[] attributes = new String[initCodeAnalysis.getLocalVariablesMap().size()];
        int index = 0;
        for ( Map.Entry<String, JavaLocalDeclarationDescr> entry : initCodeAnalysis.getLocalVariablesMap().entrySet() ) {
            attributes[index] = entry.getKey();
            attributesTypes[index] = entry.getValue().getType();
            index++;
        }

        map.put( "attributes",
                 attributes );
        map.put( "attributesTypes",
                 attributesTypes );

        map.put( "initCode",
                 initCode );
        map.put( "actionCode",
                 actionCode );
        map.put( "resultCode",
                 resultCode );
        if ( accumDescr.getReverseCode() == null ) {
            map.put( "reverseCode",
                     "" );
            map.put( "supportsReverse",
                     "false" );
        } else {
            map.put( "reverseCode",
                     accumDescr.getReverseCode() );
            map.put( "supportsReverse",
                     "true" );
        }

        map.put( "hashCode",
                 new Integer( actionCode.hashCode() ) );

        accumulate = new Accumulate( source,
                                     declarations,
                                     sourceDeclArr );

        generatTemplates( "accumulateInnerClass",
                          "accumulateInvoker",
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                                                      decls,
                                                      sourceOuterDeclr,
                                                      boundIds );
            }

            final Accumulate accumulate = new Accumulate( source,
                                                          null,
                                                          null,
                                                          accumulators,
                                                          accumDescr.isMultiFunction() );
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        }

        Map<String, Declaration> declsInScope = context.getDeclarationResolver().getDeclarations( context.getRule() );
        Map<String, Class< ? >> declCls = DeclarationScopeResolver.getDeclarationClasses( declsInScope );

        Accumulate accumulate = null;
        if ( accumDescr.isExternalFunction() ) {
            // if it uses 1+ external function, build methods for them
            accumulate = buildExternalFunctionCall( context,
                                                    accumDescr,
                                                    source,
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    private Accumulate buildExternalFunctionCall( final RuleBuildContext context,
                                                  final AccumulateDescr accumDescr,
                                                  final RuleConditionElement source,
                                                  Map<String, Declaration> declsInScope,
                                                  Map<String, Class< ? >> declCls ) {
        Accumulate accumulate = null;

        // list of functions to build
        final List<AccumulateFunctionCallDescr> funcCalls = accumDescr.getFunctions();
        // list of available source declarations
        final Declaration[] sourceDeclArr = (Declaration[]) source.getOuterDeclarations().values().toArray( new Declaration[0] );

        // the accumulator array
        Accumulator[] accumulators = new Accumulator[funcCalls.size()];

        // set of required previous declarations
        Set<Declaration> requiredDecl = new HashSet<Declaration>();

        // creating the custom array reader
        InternalReadAccessor arrayReader = new SelfReferenceClassFieldReader( Object[].class,
                                                                              "this" );

        int index = 0;
        for ( AccumulateFunctionCallDescr fc : funcCalls ) {
            // find the corresponding function
            AccumulateFunction function = context.getConfiguration().getAccumulateFunction( fc.getFunction() );
            if ( function == null ) {
                context.addError( new DescrBuildError( accumDescr,
                                                              context.getRuleDescr(),
                                                              null,
                                                              "Unknown accumulate function: '" + fc.getFunction() + "' on rule '" + context.getRuleDescr().getName() + "'. All accumulate functions must be registered before building a resource." ) );
                return null;
            }

            // if there is a binding, create the binding
            if ( fc.getBind() != null ) {
                createResultBind( context,
                                  index,
                                  arrayReader,
                                  fc,
                                  function );
            }

            // analyze the expression
            final JavaAnalysisResult analysis = (JavaAnalysisResult) context.getDialect().analyzeBlock( context,
                                                                                                        accumDescr,
                                                                                                        fc.getParams().length > 0 ? fc.getParams()[0] : "\"\"",
                                                                                                        new BoundIdentifiers( declCls,
                                                                                                                              context.getPackageBuilder().getGlobals() ) );

            final BoundIdentifiers usedIdentifiers = analysis.getBoundIdentifiers();

            // create the array of used declarations
            final Declaration[] previousDeclarations = collectRequiredDeclarations( declsInScope,
                                                                                    requiredDecl,
                                                                                    usedIdentifiers );

            // generate the code template
            accumulators[index++] = generateFunctionCallCodeTemplate( context,
                                                                      accumDescr,
                                                                      sourceDeclArr,
                                                                      fc,
                                                                      function,
                                                                      usedIdentifiers,
                                                                      previousDeclarations );
        }
       
        accumulate = new Accumulate( source,
                                     requiredDecl.toArray( new Declaration[requiredDecl.size()] ),
                                     sourceDeclArr,
                                     accumulators,
                                     accumDescr.isMultiFunction() );
        return accumulate;
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    private Accumulate buildInlineAccumulate( final RuleBuildContext context,
                                              final AccumulateDescr accumDescr,
                                              final RuleConditionElement source,
                                              Map<String, Declaration> decls,
                                              Map<String, Class< ? >> declCls ) {
        Accumulate accumulate;
        // ELSE, if it is not an external function, build it using the regular java builder
        final String className = "Accumulate" + context.getNextId();
        accumDescr.setClassName( className );

        BoundIdentifiers available = new BoundIdentifiers( declCls,
                                                           context.getPackageBuilder().getGlobals() );

        final JavaAnalysisResult initCodeAnalysis = (JavaAnalysisResult) context.getDialect().analyzeBlock( context,
                                                                                                            accumDescr,
                                                                                                            accumDescr.getInitCode(),
                                                                                                            available );
        final AnalysisResult actionCodeAnalysis = context.getDialect().analyzeBlock( context,
                                                                                     accumDescr,
                                                                                     accumDescr.getActionCode(),
                                                                                     available );

        final AnalysisResult resultCodeAnalysis = context.getDialect().analyzeExpression( context,
                                                                                                  accumDescr,
                                                                                                  accumDescr.getResultCode(),
                                                                                                  available );

        final Set<String> requiredDeclarations = new HashSet<String>( initCodeAnalysis.getBoundIdentifiers().getDeclrClasses().keySet() );
        requiredDeclarations.addAll( actionCodeAnalysis.getBoundIdentifiers().getDeclrClasses().keySet() );
        requiredDeclarations.addAll( resultCodeAnalysis.getBoundIdentifiers().getDeclrClasses().keySet() );

        final Map<String, Class< ? >> requiredGlobals = new HashMap<String, Class< ? >>( initCodeAnalysis.getBoundIdentifiers().getGlobals() );
        requiredGlobals.putAll( actionCodeAnalysis.getBoundIdentifiers().getGlobals() );
        requiredGlobals.putAll( resultCodeAnalysis.getBoundIdentifiers().getGlobals() );

        if ( accumDescr.getReverseCode() != null ) {
            final AnalysisResult reverseCodeAnalysis = context.getDialect().analyzeBlock( context,
                                                                                                  accumDescr,
                                                                                                  accumDescr.getActionCode(),
                                                                                                  available );
            requiredDeclarations.addAll( reverseCodeAnalysis.getBoundIdentifiers().getDeclrClasses().keySet() );
            requiredGlobals.putAll( reverseCodeAnalysis.getBoundIdentifiers().getGlobals() );
        }

        final Declaration[] declarations = new Declaration[requiredDeclarations.size()];
        int i = 0;
        for ( Iterator<String> it = requiredDeclarations.iterator(); it.hasNext(); i++ ) {
            declarations[i] = decls.get( it.next() );
        }
        final Declaration[] sourceDeclArr = (Declaration[]) source.getOuterDeclarations().values().toArray( new Declaration[0] );

        final Map<String, Object> map = createVariableContext( className,
                                                               null,
                                                               context,
                                                               declarations,
                                                               null,
                                                               requiredGlobals
        );

        map.put( "className",
                 accumDescr.getClassName() );
        map.put( "innerDeclarations",
                 sourceDeclArr );
        map.put( "isMultiPattern",
                 accumDescr.isMultiPattern() ? Boolean.TRUE : Boolean.FALSE );

        final String initCode = this.fixInitCode( initCodeAnalysis,
                                                  accumDescr.getInitCode() );
        final String actionCode = accumDescr.getActionCode();
        final String resultCode = accumDescr.getResultCode();

        String[] attributesTypes = new String[initCodeAnalysis.getLocalVariablesMap().size()];
        String[] attributes = new String[initCodeAnalysis.getLocalVariablesMap().size()];
        int index = 0;
        for ( Map.Entry<String, JavaLocalDeclarationDescr> entry : initCodeAnalysis.getLocalVariablesMap().entrySet() ) {
            attributes[index] = entry.getKey();
            attributesTypes[index] = entry.getValue().getType();
            index++;
        }

        map.put( "attributes",
                 attributes );
        map.put( "attributesTypes",
                 attributesTypes );

        map.put( "initCode",
                 initCode );
        map.put( "actionCode",
                 actionCode );
        map.put( "resultCode",
                 resultCode );
        if ( accumDescr.getReverseCode() == null ) {
            map.put( "reverseCode",
                     "" );
            map.put( "supportsReverse",
                     "false" );
        } else {
            map.put( "reverseCode",
                     accumDescr.getReverseCode() );
            map.put( "supportsReverse",
                     "true" );
        }

        map.put( "hashCode",
                 new Integer( actionCode.hashCode() ) );

        accumulate = new Accumulate( source,
                                     declarations,
                                     sourceDeclArr );

        generateTemplates("accumulateInnerClass",
                "accumulateInvoker",
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        this.accumulator = new MockAccumulator();

        final ObjectType srcObjType = new ClassObjectType( String.class );
        final Pattern sourcePattern = new Pattern( 0,
                                                   srcObjType );
        this.accumulate = new Accumulate( sourcePattern,
                                          new Declaration[0],
                                          new Declaration[0],
                                          this.accumulator );

        this.node = new AccumulateNode( 15,
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