Examples with TypedExpression org.drools.mvelcompiler.ast.TypedExpression used on opensource projects

Example 6 with TypedExpression

use of org.drools.mvelcompiler.ast.TypedExpression in project drools by kiegroup.

the class StatementVisitor method compileMVEL.

private TypedExpression compileMVEL(Node n) {
    TypedExpression rhs = new RHSPhase(mvelCompilerContext).invoke(n);
    TypedExpression lhs = new LHSPhase(mvelCompilerContext, ofNullable(rhs)).invoke(n);
    Optional<TypedExpression> postProcessedRHS = new ReProcessRHSPhase(mvelCompilerContext).invoke(rhs, lhs);
    TypedExpression postProcessedLHS = postProcessedRHS.map(ppr -> new LHSPhase(mvelCompilerContext, of(ppr)).invoke(n)).orElse(lhs);
    return postProcessedLHS;
}

Example 7 with TypedExpression

use of org.drools.mvelcompiler.ast.TypedExpression in project drools by kiegroup.

the class StatementVisitor method visit.

@Override
public TypedExpression visit(WhileStmt n, Void arg) {
    TypedExpression typedCondition = new RHSPhase(mvelCompilerContext).invoke(n.getCondition());
    TypedExpression typedThen = n.getBody().accept(this, arg);
    return new WhileStmtT(typedCondition, typedThen);
}

Example 8 with TypedExpression

use of org.drools.mvelcompiler.ast.TypedExpression in project drools by kiegroup.

the class StatementVisitor method visit.

@Override
public TypedExpression visit(SwitchStmt n, Void arg) {
    TypedExpression typedSelector = new RHSPhase(mvelCompilerContext).invoke(n.getSelector());
    List<TypedExpression> typedEntries = n.getEntries().stream().map(e -> e.accept(this, arg)).collect(Collectors.toList());
    return new SwitchStmtT(typedSelector, typedEntries);
}

Example 9 with TypedExpression

use of org.drools.mvelcompiler.ast.TypedExpression in project drools by kiegroup.

the class StatementVisitor method visit.

@Override
public TypedExpression visit(ForEachStmt n, Void arg) {
    Expression iterable = n.getIterable();
    Optional<TypedExpression> convertedToDowncastStmt = iterable.toNameExpr().map(PrintUtil::printNode).flatMap(mvelCompilerContext::findDeclarations).filter(this::isDeclarationIterable).map(d -> toForEachDowncastStmtT(n, arg));
    if (convertedToDowncastStmt.isPresent()) {
        return convertedToDowncastStmt.get();
    }
    TypedExpression variableDeclarationExpr = new LHSPhase(mvelCompilerContext, Optional.empty()).invoke(n.getVariable());
    TypedExpression typedIterable = new RHSPhase(mvelCompilerContext).invoke(n.getIterable());
    TypedExpression body = n.getBody().accept(this, arg);
    return new ForEachStmtT(variableDeclarationExpr, typedIterable, body);
}

Example 10 with TypedExpression

use of org.drools.mvelcompiler.ast.TypedExpression in project drools by kiegroup.

the class MvelCompiler method compileStatement.

public CompiledBlockResult compileStatement(String mvelBlock) {
    BlockStmt mvelExpression = MvelParser.parseBlock(mvelBlock);
    preprocessPhase.removeEmptyStmt(mvelExpression);
    Set<String> allUsedBindings = new HashSet<>();
    List<String> modifyUsedBindings = mvelExpression.findAll(ModifyStatement.class).stream().flatMap(this::transformStatementWithPreprocessing).collect(toList());
    List<String> withUsedBindings = mvelExpression.findAll(WithStatement.class).stream().flatMap(this::transformStatementWithPreprocessing).collect(toList());
    allUsedBindings.addAll(modifyUsedBindings);
    allUsedBindings.addAll(withUsedBindings);
    // Entry point of the compiler
    TypedExpression compiledRoot = mvelExpression.accept(statementVisitor, null);
    allUsedBindings.addAll(mvelCompilerContext.getUsedBindings());
    Node javaRoot = compiledRoot.toJavaExpression();
    if (!(javaRoot instanceof BlockStmt)) {
        throw new MvelCompilerException("With a BlockStmt as a input I was expecting a BlockStmt output");
    }
    BlockStmt compiledBlockStatement = (BlockStmt) javaRoot;
    return new CompiledBlockResult(compiledBlockStatement.getStatements()).setUsedBindings(allUsedBindings);
}