Examples with Declaration org.drools.core.rule.Declaration used on opensource projects

Example 56 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class PatternBuilder method getDeclarationsForReturnValue.

private Declaration[] getDeclarationsForReturnValue(RuleBuildContext context, RelationalExprDescr relDescr, String operator, String value2) {
    Pattern pattern = (Pattern) context.getDeclarationResolver().peekBuildStack();
    ReturnValueRestrictionDescr returnValueRestrictionDescr = new ReturnValueRestrictionDescr(operator, relDescr, value2);
    AnalysisResult analysis = context.getDialect().analyzeExpression(context, returnValueRestrictionDescr, returnValueRestrictionDescr.getContent(), new BoundIdentifiers(pattern, context, null, pattern.getObjectType().getClassType()));
    if (analysis == null) {
        // something bad happened
        return null;
    }
    final BoundIdentifiers usedIdentifiers = analysis.getBoundIdentifiers();
    final List<Declaration> tupleDeclarations = new ArrayList<Declaration>();
    final List<Declaration> factDeclarations = new ArrayList<Declaration>();
    for (String id : usedIdentifiers.getDeclrClasses().keySet()) {
        Declaration decl = context.getDeclarationResolver().getDeclaration(id);
        if (decl.getPattern() == pattern) {
            factDeclarations.add(decl);
        } else {
            tupleDeclarations.add(decl);
        }
    }
    createImplicitBindings(context, pattern, analysis.getNotBoundedIdentifiers(), usedIdentifiers, factDeclarations);
    final Declaration[] previousDeclarations = tupleDeclarations.toArray(new Declaration[tupleDeclarations.size()]);
    final Declaration[] localDeclarations = factDeclarations.toArray(new Declaration[factDeclarations.size()]);
    Arrays.sort(previousDeclarations, SortDeclarations.instance);
    Arrays.sort(localDeclarations, SortDeclarations.instance);
    final String[] requiredGlobals = usedIdentifiers.getGlobals().keySet().toArray(new String[usedIdentifiers.getGlobals().size()]);
    Declaration[] requiredDeclarations = new Declaration[previousDeclarations.length + localDeclarations.length];
    System.arraycopy(previousDeclarations, 0, requiredDeclarations, 0, previousDeclarations.length);
    System.arraycopy(localDeclarations, 0, requiredDeclarations, previousDeclarations.length, localDeclarations.length);
    Declaration[] declarations = new Declaration[requiredDeclarations.length + requiredGlobals.length];
    int i = 0;
    for (Declaration requiredDeclaration : requiredDeclarations) {
        declarations[i++] = requiredDeclaration;
    }
    for (String requiredGlobal : requiredGlobals) {
        declarations[i++] = context.getDeclarationResolver().getDeclaration(requiredGlobal);
    }
    return declarations;
}

Example 57 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class PatternBuilder method isDateType.

private boolean isDateType(RuleBuildContext context, Pattern pattern, String leftValue) {
    Declaration declaration = pattern.getDeclarations().get(leftValue);
    if (declaration != null && declaration.getExtractor() != null) {
        return declaration.getValueType() == ValueType.DATE_TYPE;
    }
    if (pattern.getObjectType() instanceof FactTemplateObjectType) {
        return ((FactTemplateObjectType) pattern.getObjectType()).getFactTemplate().getFieldTemplate(leftValue).getValueType() == ValueType.DATE_TYPE;
    }
    Class<?> clazz = ((ClassObjectType) pattern.getObjectType()).getClassType();
    Class<?> fieldType = context.getPkg().getClassFieldAccessorStore().getFieldType(clazz, leftValue);
    return fieldType != null && ValueType.isDateType(fieldType);
}

Example 58 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class PatternBuilder method getUsedDeclarations.

public static Declaration[][] getUsedDeclarations(RuleBuildContext context, Pattern pattern, AnalysisResult analysis) {
    BoundIdentifiers usedIdentifiers = analysis.getBoundIdentifiers();
    final List<Declaration> tupleDeclarations = new ArrayList<Declaration>();
    final List<Declaration> factDeclarations = new ArrayList<Declaration>();
    for (String id : usedIdentifiers.getDeclrClasses().keySet()) {
        Declaration decl = context.getDeclarationResolver().getDeclaration(id);
        if (decl.getPattern() == pattern) {
            factDeclarations.add(decl);
        } else {
            tupleDeclarations.add(decl);
        }
    }
    createImplicitBindings(context, pattern, analysis.getNotBoundedIdentifiers(), analysis.getBoundIdentifiers(), factDeclarations);
    Declaration[][] usedDeclarations = new Declaration[2][];
    usedDeclarations[0] = tupleDeclarations.toArray(new Declaration[tupleDeclarations.size()]);
    usedDeclarations[1] = factDeclarations.toArray(new Declaration[factDeclarations.size()]);
    return usedDeclarations;
}

Example 59 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class PatternBuilder method createDeclarationForOperator.

private static Declaration createDeclarationForOperator(RuleBuildContext context, Pattern pattern, String expr) {
    Declaration declaration;
    int dotPos = expr.indexOf('.');
    if (dotPos < 0) {
        if (!isIdentifier(expr)) {
            return null;
        }
        declaration = context.getDeclarationResolver().getDeclaration(expr);
        if (declaration == null) {
            if ("this".equals(expr)) {
                declaration = createDeclarationObject(context, "this", pattern);
            } else {
                declaration = new Declaration("this", pattern);
                context.getPkg().getClassFieldAccessorStore().getReader(pattern.getObjectType().getClassName(), expr, declaration);
            }
        }
    } else {
        String part1 = expr.substring(0, dotPos).trim();
        String part2 = expr.substring(dotPos + 1).trim();
        if ("this".equals(part1)) {
            declaration = createDeclarationObject(context, part2, (Pattern) context.getDeclarationResolver().peekBuildStack());
        } else {
            declaration = context.getDeclarationResolver().getDeclaration(part1);
            // if a declaration exists, then it may be a variable direct property access
            if (declaration != null) {
                declaration = createDeclarationObject(context, part2, declaration.getPattern());
            }
        }
    }
    return declaration;
}

Example 60 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class PatternBuilder method buildEval.

@SuppressWarnings("unchecked")
protected Constraint buildEval(final RuleBuildContext context, final Pattern pattern, final PredicateDescr predicateDescr, final Map<String, OperatorDescr> aliases, final String expr, final boolean isEvalExpression) {
    AnalysisResult analysis = buildAnalysis(context, pattern, predicateDescr, aliases);
    if (analysis == null) {
        // something bad happened
        return null;
    }
    Declaration[][] usedDeclarations = getUsedDeclarations(context, pattern, analysis);
    Declaration[] previousDeclarations = usedDeclarations[0];
    Declaration[] localDeclarations = usedDeclarations[1];
    BoundIdentifiers usedIdentifiers = analysis.getBoundIdentifiers();
    Arrays.sort(previousDeclarations, SortDeclarations.instance);
    Arrays.sort(localDeclarations, SortDeclarations.instance);
    boolean isJavaEval = isEvalExpression && context.getDialect() instanceof JavaDialect;
    if (isJavaEval) {
        final PredicateConstraint predicateConstraint = new PredicateConstraint(null, previousDeclarations, localDeclarations);
        final PredicateBuilder builder = context.getDialect().getPredicateBuilder();
        builder.build(context, usedIdentifiers, previousDeclarations, localDeclarations, predicateConstraint, predicateDescr, analysis);
        return predicateConstraint;
    }
    MVELCompilationUnit compilationUnit = getConstraintBuilder(context).buildCompilationUnit(context, previousDeclarations, localDeclarations, predicateDescr, analysis);
    String[] requiredGlobals = usedIdentifiers.getGlobals().keySet().toArray(new String[usedIdentifiers.getGlobals().size()]);
    Declaration[] mvelDeclarations = new Declaration[previousDeclarations.length + localDeclarations.length + requiredGlobals.length];
    int i = 0;
    for (Declaration d : previousDeclarations) {
        mvelDeclarations[i++] = d;
    }
    for (Declaration d : localDeclarations) {
        mvelDeclarations[i++] = d;
    }
    for (String global : requiredGlobals) {
        mvelDeclarations[i++] = context.getDeclarationResolver().getDeclaration(global);
    }
    boolean isDynamic = !pattern.getObjectType().getClassType().isArray() && !context.getKnowledgeBuilder().getTypeDeclaration(pattern.getObjectType().getClassType()).isTypesafe();
    return getConstraintBuilder(context).buildMvelConstraint(context.getPkg().getName(), expr, mvelDeclarations, getOperators(usedIdentifiers.getOperators()), compilationUnit, isDynamic);
}