Package org.drools.core.rule

Examples of org.drools.core.rule.Declaration

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                                               final Set<String> unboundIdentifiers,
                                               final BoundIdentifiers boundIdentifiers,
                                               final List<Declaration> factDeclarations ) {
        for ( Iterator<String> it = unboundIdentifiers.iterator(); it.hasNext(); ) {
            String identifier = it.next();
            Declaration declaration = createDeclarationObject( context,
                                                               identifier,
                                                               pattern );
            // the name may not be a local field, such as enums
            // maybe should have a safer way to detect this, as other issues may cause null too
            // that we would need to know about
            if ( declaration != null ) {
                factDeclarations.add( declaration );
                // implicit bindings need to be added to "local" declarations, as they are nolonger unbound
                if ( boundIdentifiers.getDeclarations() == null ) {
                    boundIdentifiers.setDeclarations( new HashMap<String, Declaration>() );
                }
                boundIdentifiers.getDeclarations().put( identifier,
                                                        declaration );
                boundIdentifiers.getDeclrClasses().put( identifier,
                                                        declaration.getExtractor().getExtractToClass() );
                it.remove();
            }
        }
    }
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                                                 final String expr,
                                                 final Pattern pattern ) {
        final BindingDescr implicitBinding = new BindingDescr( identifier,
                                                               expr );

        final Declaration declaration = new Declaration( identifier,
                                                         null,
                                                         pattern,
                                                         true );

        InternalReadAccessor extractor = getFieldReadAccessor( context,
                                                               implicitBinding,
                                                               pattern.getObjectType(),
                                                               implicitBinding.getExpression(),
                                                               declaration,
                                                               false );

        if ( extractor == null ) {
            return null;
        }

        declaration.setReadAccessor( extractor );

        return declaration;
    }
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                reader = null;
            } finally {
                context.setDialect( dialect );
            }
        } else {
            Declaration decl = context.getDeclarationResolver().getDeclarations( context.getRule() ).get(fieldName);
            if (decl != null && decl.getExtractor() instanceof ClassFieldReader && "this".equals(((ClassFieldReader)decl.getExtractor()).getFieldName())) {
                return decl.getExtractor();
            }

            boolean alternatives = false;
            try {
                Map<String, Class< ? >> declarations = getDeclarationsMap( descr, context, false );
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            QueryTerminalNode node = (QueryTerminalNode) resultLeftTuple.getLeftTupleSink();
            Declaration[] decls = node.getDeclarations();
            DroolsQuery dquery = (DroolsQuery) this.factHandle.getObject();
            Object[] objects = new Object[dquery.getElements().length];

            Declaration decl;
            for ( int i = 0, length = this.variables.length; i < length; i++ ) {
                decl = decls[this.variables[i]];
                objects[this.variables[i]] = decl.getValue( workingMemory,
                                                            resultLeftTuple.get( decl ).getObject() );
            }

            QueryElementFactHandle resultHandle = createQueryResultHandle(context,
                                                                          workingMemory,
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            InternalFactHandle rootHandle = resultLeftTuple.get( 0 );
            DroolsQuery dquery = (DroolsQuery) rootHandle.getObject();

            Object[] objects = new Object[dquery.getElements().length];

            Declaration decl;
            for ( int i = 0, length = this.variables.length; i < length; i++ ) {
                decl = decls[this.variables[i]];
                objects[this.variables[i]] = decl.getValue( workingMemory,
                                                            resultLeftTuple.get( decl ).getObject() );
            }

            QueryElementFactHandle handle = (QueryElementFactHandle) rightTuple.getFactHandle();
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                          args.length );

        int[] declIndexes = this.queryElement.getDeclIndexes();

        for ( int i = 0, length = declIndexes.length; i < length; i++ ) {
            Declaration declr = (Declaration) argTemplate[declIndexes[i]];

            Object tupleObject = leftTuple.get( declr ).getObject();

            Object o;

            if ( tupleObject instanceof DroolsQuery ) {
                // If the query passed in a Variable, we need to use it
                ArrayElementReader arrayReader = (ArrayElementReader) declr.getExtractor();
                if ( ((DroolsQuery) tupleObject).getVariables()[arrayReader.getIndex()] != null ) {
                    o = Variable.v;
                } else {
                    o = declr.getValue( workingMemory,
                                        tupleObject );
                }
            } else {
                o = declr.getValue( workingMemory,
                                    tupleObject );
            }

            args[declIndexes[i]] = o;
        }
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    private String extractDeclarations(final Activation activation,  final WorkingMemory workingMemory) {
        final StringBuilder result = new StringBuilder();
        final Tuple tuple = activation.getTuple();
        final Map<?, ?> declarations = activation.getSubRule().getOuterDeclarations();
        for ( Iterator<?> it = declarations.values().iterator(); it.hasNext(); ) {
            final Declaration declaration = (Declaration) it.next();
            final InternalFactHandle handle = tuple.get( declaration );
            if ( handle != null ) {
                if ( handle.getId() == -1 ) {
                    // This handle is now invalid, probably due to an fact retraction
                    continue;
                }
                final Object value = declaration.getValue( (InternalWorkingMemory) workingMemory, handle.getObject() );

                result.append( declaration.getIdentifier() );
                result.append( "=" );
                if ( value == null ) {
                    // this should never occur
                    result.append( "null" );
                } else {
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                                                                      0 );

        final Pattern pattern = new Pattern( 0,
                                          new FactTemplateObjectType( cheese ) );

        final Declaration declaration = new Declaration( "typeOfCheese",
                                                         extractName,
                                                         pattern );

        final Fact brie = cheese.createFact( 12 );
        brie.setFieldValue( "name",
                            "brie" );
        brie.setFieldValue( "price",
                            new Integer( 55 ) );

        // Check we can extract Declarations correctly
        assertEquals( "brie",
                      declaration.getValue( null, brie ) );
    }
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        store.setClassFieldAccessorCache( new ClassFieldAccessorCache( Thread.currentThread().getContextClassLoader() ) );
        store.setEagerWire( true );
        InternalReadAccessor extractor = store.getReader( clazz,
                                                          fieldName,
                                                          getClass().getClassLoader() );
        Declaration declaration = new Declaration( identifier,
                                                   extractor,
                                                   new Pattern( 0,
                                                                new ClassObjectType( clazz ) ) );

        String expression = fieldName + " " + operator.getOperatorString() + " " + identifier;
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                                               "s2" );

        rule.addPattern( list1Pattern );
        rule.addPattern( list2Pattern );

        final Declaration s1Declaration = rule.getDeclaration( "s1" );
        final Declaration s2Declaration = rule.getDeclaration( "s2" );

        this.values = new ArrayList();

        rule.setConsequence( new Consequence() {
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Related Classes of org.drools.core.rule.Declaration

  • org.drools.compiler.phreak.BetaNodeBuilder
  • org.drools.compiler.rule.builder.dialect.asm.AbstractASMEvalBuilder
  • org.drools.compiler.rule.builder.dialect.DialectUtil
  • org.drools.compiler.rule.builder.dialect.java.AccumulateTemplateTest
  • org.drools.compiler.rule.builder.dialect.java.JavaAccumulateBuilder
  • org.drools.compiler.rule.builder.dialect.java.JavaConsequenceBuilderTest
  • org.drools.compiler.rule.builder.dialect.mvel.MVELAccumulateBuilder
  • org.drools.compiler.rule.builder.dialect.mvel.MVELConsequenceBuilderTest
  • org.drools.compiler.rule.builder.dialect.mvel.MVELEvalBuilderTest
  • org.drools.compiler.rule.builder.dialect.mvel.MVELPredicateBuilderTest
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