Examples with MethodCallExpr org.drools.javaparser.ast.expr.MethodCallExpr used on opensource projects

Example 21 with MethodCallExpr

use of org.drools.javaparser.ast.expr.MethodCallExpr in project drools by kiegroup.

the class FromVisitor method createFromCall.

private Expression createFromCall(String expression, Optional<String> optContainsBinding, String bindingId) {
    MethodCallExpr fromCall = new MethodCallExpr(null, FROM_CALL);
    fromCall.addArgument(new NameExpr(toVar(bindingId)));
    if (optContainsBinding.isPresent()) {
        DeclarationSpec declarationSpec = ruleContext.getDeclarationById(bindingId).orElseThrow(RuntimeException::new);
        Class<?> clazz = declarationSpec.getDeclarationClass();
        DrlxParseResult drlxParseResult = new ConstraintParser(ruleContext, packageModel).drlxParse(clazz, bindingId, expression);
        drlxParseResult.accept(drlxParseSuccess -> {
            Expression parsedExpression = drlxParseSuccess.getExpr();
            Expression exprArg = generateLambdaWithoutParameters(drlxParseSuccess.getUsedDeclarations(), parsedExpression);
            fromCall.addArgument(exprArg);
        });
    }
    return fromCall;
}

Example 22 with MethodCallExpr

use of org.drools.javaparser.ast.expr.MethodCallExpr in project drools by kiegroup.

the class NamedConsequenceVisitor method visit.

public void visit(NamedConsequenceDescr descr) {
    MethodCallExpr executeCallDSL = onDSL(descr);
    context.addExpression(executeCallDSL);
}

Example 23 with MethodCallExpr

use of org.drools.javaparser.ast.expr.MethodCallExpr in project drools by kiegroup.

the class AccumulateVisitor method visit.

public void visit(AccumulateDescr descr, PatternDescr basePattern) {
    final MethodCallExpr accumulateDSL = new MethodCallExpr(null, "accumulate");
    context.addExpression(accumulateDSL);
    final MethodCallExpr accumulateExprs = new MethodCallExpr(null, "and");
    accumulateDSL.addArgument(accumulateExprs);
    context.pushExprPointer(accumulateExprs::addArgument);
    BaseDescr input = descr.getInputPattern() == null ? descr.getInput() : descr.getInputPattern();
    boolean inputPatternHasConstraints = (input instanceof PatternDescr) && (!((PatternDescr) input).getConstraint().getDescrs().isEmpty());
    input.accept(modelGeneratorVisitor);
    if (accumulateExprs.getArguments().isEmpty()) {
        accumulateDSL.remove(accumulateExprs);
    } else if (accumulateExprs.getArguments().size() == 1) {
        accumulateDSL.setArgument(0, accumulateExprs.getArguments().get(0));
    }
    if (!descr.getFunctions().isEmpty()) {
        for (AccumulateDescr.AccumulateFunctionCallDescr function : descr.getFunctions()) {
            final Optional<NewBinding> optNewBinding = visit(context, function, accumulateDSL, basePattern, inputPatternHasConstraints);
            processNewBinding(optNewBinding);
        }
    } else if (descr.getFunctions().isEmpty() && descr.getInitCode() != null) {
        // LEGACY: Accumulate with inline custom code
        if (input instanceof PatternDescr) {
            visitAccInlineCustomCode(context, descr, accumulateDSL, basePattern, (PatternDescr) input);
        } else {
            throw new UnsupportedOperationException("I was expecting input to be of type PatternDescr. " + input);
        }
    } else {
        throw new UnsupportedOperationException("Unknown type of Accumulate.");
    }
    context.popExprPointer();
    postVisit();
}

Example 24 with MethodCallExpr

use of org.drools.javaparser.ast.expr.MethodCallExpr in project drools by kiegroup.

the class AccumulateVisitor method visitAccInlineCustomCode.

/**
 * By design this legacy accumulate (with inline custome code) visitor supports only with 1-and-only binding in the accumulate code/expressions.
 */
protected void visitAccInlineCustomCode(RuleContext context2, AccumulateDescr descr, MethodCallExpr accumulateDSL, PatternDescr basePattern, PatternDescr inputDescr) {
    context.pushExprPointer(accumulateDSL::addArgument);
    final MethodCallExpr functionDSL = new MethodCallExpr(null, "accFunction");
    String code = null;
    try {
        code = new String(IoUtils.readBytesFromInputStream(this.getClass().getResourceAsStream("/AccumulateInlineFunction.java")));
    } catch (IOException e1) {
        e1.printStackTrace();
        throw new RuntimeException("Unable to locate template.");
    }
    String targetClassName = StringUtil.toId(context2.getRuleDescr().getName()) + "Accumulate" + descr.getLine();
    code = code.replaceAll("AccumulateInlineFunction", targetClassName);
    CompilationUnit templateCU = JavaParser.parse(code);
    ClassOrInterfaceDeclaration templateClass = templateCU.getClassByName(targetClassName).orElseThrow(() -> new RuntimeException("Template did not contain expected type definition."));
    ClassOrInterfaceDeclaration templateContextClass = templateClass.getMembers().stream().filter(m -> m instanceof ClassOrInterfaceDeclaration && ((ClassOrInterfaceDeclaration) m).getNameAsString().equals("ContextData")).map(ClassOrInterfaceDeclaration.class::cast).findFirst().orElseThrow(() -> new RuntimeException("Template did not contain expected type definition."));
    List<String> contextFieldNames = new ArrayList<>();
    MethodDeclaration initMethod = templateClass.getMethodsByName("init").get(0);
    BlockStmt initBlock = JavaParser.parseBlock("{" + descr.getInitCode() + "}");
    for (Statement stmt : initBlock.getStatements()) {
        if (stmt instanceof ExpressionStmt && ((ExpressionStmt) stmt).getExpression() instanceof VariableDeclarationExpr) {
            VariableDeclarationExpr vdExpr = (VariableDeclarationExpr) ((ExpressionStmt) stmt).getExpression();
            for (VariableDeclarator vd : vdExpr.getVariables()) {
                contextFieldNames.add(vd.getNameAsString());
                templateContextClass.addField(vd.getType(), vd.getNameAsString(), Modifier.PUBLIC);
                if (vd.getInitializer().isPresent()) {
                    Expression initializer = vd.getInitializer().get();
                    Expression target = new FieldAccessExpr(new NameExpr("data"), vd.getNameAsString());
                    Statement initStmt = new ExpressionStmt(new AssignExpr(target, initializer, AssignExpr.Operator.ASSIGN));
                    initMethod.getBody().get().addStatement(initStmt);
                }
            }
        } else {
            // add as-is.
            initMethod.getBody().get().addStatement(stmt);
        }
    }
    Type singleAccumulateType = JavaParser.parseType("java.lang.Object");
    MethodDeclaration accumulateMethod = templateClass.getMethodsByName("accumulate").get(0);
    BlockStmt actionBlock = JavaParser.parseBlock("{" + descr.getActionCode() + "}");
    Collection<String> allNamesInActionBlock = collectNamesInBlock(context2, actionBlock);
    if (allNamesInActionBlock.size() == 1) {
        String nameExpr = allNamesInActionBlock.iterator().next();
        accumulateMethod.getParameter(1).setName(nameExpr);
        singleAccumulateType = context2.getDeclarationById(nameExpr).get().getType();
    } else {
        new LegacyAccumulate(context, descr, basePattern).build();
        return;
    }
    writeAccumulateMethod(contextFieldNames, singleAccumulateType, accumulateMethod, actionBlock);
    // <result expression>: this is a semantic expression in the selected dialect that is executed after all source objects are iterated.
    MethodDeclaration resultMethod = templateClass.getMethodsByName("getResult").get(0);
    Type returnExpressionType = JavaParser.parseType("java.lang.Object");
    Expression returnExpression = JavaParser.parseExpression(descr.getResultCode());
    if (returnExpression instanceof NameExpr) {
        returnExpression = new EnclosedExpr(returnExpression);
    }
    rescopeNamesToNewScope(new NameExpr("data"), contextFieldNames, returnExpression);
    resultMethod.getBody().get().addStatement(new ReturnStmt(returnExpression));
    MethodDeclaration getResultTypeMethod = templateClass.getMethodsByName("getResultType").get(0);
    getResultTypeMethod.getBody().get().addStatement(new ReturnStmt(new ClassExpr(returnExpressionType)));
    if (descr.getReverseCode() != null) {
        MethodDeclaration supportsReverseMethod = templateClass.getMethodsByName("supportsReverse").get(0);
        supportsReverseMethod.getBody().get().addStatement(JavaParser.parseStatement("return true;"));
        MethodDeclaration reverseMethod = templateClass.getMethodsByName("reverse").get(0);
        BlockStmt reverseBlock = JavaParser.parseBlock("{" + descr.getReverseCode() + "}");
        Collection<String> allNamesInReverseBlock = collectNamesInBlock(context2, reverseBlock);
        if (allNamesInReverseBlock.size() == 1) {
            reverseMethod.getParameter(1).setName(allNamesInReverseBlock.iterator().next());
        } else {
            new LegacyAccumulate(context, descr, basePattern).build();
            return;
        }
        writeAccumulateMethod(contextFieldNames, singleAccumulateType, reverseMethod, reverseBlock);
    } else {
        MethodDeclaration supportsReverseMethod = templateClass.getMethodsByName("supportsReverse").get(0);
        supportsReverseMethod.getBody().get().addStatement(JavaParser.parseStatement("return false;"));
        MethodDeclaration reverseMethod = templateClass.getMethodsByName("reverse").get(0);
        reverseMethod.getBody().get().addStatement(JavaParser.parseStatement("throw new UnsupportedOperationException(\"This function does not support reverse.\");"));
    }
    // add resulting accumulator class into the package model
    this.packageModel.addGeneratedPOJO(templateClass);
    functionDSL.addArgument(new ClassExpr(JavaParser.parseType(targetClassName)));
    functionDSL.addArgument(new NameExpr(toVar(inputDescr.getIdentifier())));
    final String bindingId = basePattern.getIdentifier();
    final MethodCallExpr asDSL = new MethodCallExpr(functionDSL, "as");
    asDSL.addArgument(new NameExpr(toVar(bindingId)));
    accumulateDSL.addArgument(asDSL);
    context.popExprPointer();
}

Example 25 with MethodCallExpr

use of org.drools.javaparser.ast.expr.MethodCallExpr in project drools by kiegroup.

the class AccumulateVisitorFlowDSL method replaceBindingWithPatternBinding.

private void replaceBindingWithPatternBinding(MethodCallExpr bindExpression, MethodCallExpr lastPattern) {
    if (lastPattern == null) {
        return;
    }
    final Expression bindingId = lastPattern.getArgument(1);
    bindExpression.findFirst(NameExpr.class, e -> e.equals(bindingId)).ifPresent(name -> {
        LambdaExpr lambda = (LambdaExpr) bindExpression.getArgument(bindExpression.getArguments().size() - 1);
        if (lambda.getParameters().size() > 1) {
            String formalArg = fromVar(name.getNameAsString());
            for (Parameter param : lambda.getParameters()) {
                if (param.getNameAsString().equals(formalArg)) {
                    lambda.getParameters().remove(param);
                    lambda.getParameters().add(0, param);
                    break;
                }
            }
        }
        bindExpression.getArguments().remove(name);
        bindExpression.getArguments().add(0, name);
    });
}