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Example 6 with LambdaExpr

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

the class FlowExpressionBuilder method buildIndexedBy.

private MethodCallExpr buildIndexedBy(DrlxParseSuccess drlxParseResult, MethodCallExpr exprDSL) {
    if (!hasIndex(drlxParseResult)) {
        return exprDSL;
    }
    TypedExpression left = drlxParseResult.getLeft();
    TypedExpression right = drlxParseResult.getRight();
    Class<?> indexType = Stream.of(left, right).map(TypedExpression::getType).filter(Objects::nonNull).findFirst().get();
    ClassExpr indexedBy_indexedClass = new ClassExpr(JavaParser.parseType(indexType.getCanonicalName()));
    // not 100% accurate as the type in "nameExpr" is actually parsed if it was JavaParsers as a big chain of FieldAccessExpr
    FieldAccessExpr indexedBy_constraintType = new FieldAccessExpr(new NameExpr("org.drools.model.Index.ConstraintType"), drlxParseResult.getDecodeConstraintType().toString());
    LambdaExpr indexedBy_leftOperandExtractor = new LambdaExpr();
    indexedBy_leftOperandExtractor.addParameter(new Parameter(new UnknownType(), "_this"));
    boolean leftContainsThis = left.getExpression().toString().contains("_this");
    indexedBy_leftOperandExtractor.setBody(new ExpressionStmt(leftContainsThis ? left.getExpression() : right.getExpression()));
    MethodCallExpr indexedByDSL = new MethodCallExpr(exprDSL, INDEXED_BY_CALL);
    indexedByDSL.addArgument(indexedBy_indexedClass);
    indexedByDSL.addArgument(indexedBy_constraintType);
    indexedByDSL.addArgument("" + indexIdGenerator.getFieldId(drlxParseResult.getPatternType(), left.getFieldName()));
    indexedByDSL.addArgument(indexedBy_leftOperandExtractor);
    Collection<String> usedDeclarations = drlxParseResult.getUsedDeclarations();
    if (isAlphaIndex(usedDeclarations)) {
        indexedByDSL.addArgument(right.getExpression());
    } else {
        LambdaExpr indexedBy_rightOperandExtractor = new LambdaExpr();
        indexedBy_rightOperandExtractor.addParameter(new Parameter(new UnknownType(), usedDeclarations.iterator().next()));
        indexedBy_rightOperandExtractor.setBody(new ExpressionStmt(!leftContainsThis ? left.getExpression() : right.getExpression()));
        indexedByDSL.addArgument(indexedBy_rightOperandExtractor);
    }
    return indexedByDSL;
}
Also used : LambdaExpr(org.drools.javaparser.ast.expr.LambdaExpr) NameExpr(org.drools.javaparser.ast.expr.NameExpr) ExpressionStmt(org.drools.javaparser.ast.stmt.ExpressionStmt) UnknownType(org.drools.javaparser.ast.type.UnknownType) Objects(java.util.Objects) Parameter(org.drools.javaparser.ast.body.Parameter) ClassExpr(org.drools.javaparser.ast.expr.ClassExpr) FieldAccessExpr(org.drools.javaparser.ast.expr.FieldAccessExpr) TypedExpression(org.drools.modelcompiler.builder.generator.TypedExpression) MethodCallExpr(org.drools.javaparser.ast.expr.MethodCallExpr)

Example 7 with LambdaExpr

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

the class PatternExpressionBuilder method generateLambdaWithoutParameters.

public Expression generateLambdaWithoutParameters(Collection<String> usedDeclarations, Expression expr, boolean skipFirstParamAsThis) {
    if (skipFirstParamAsThis && usedDeclarations.isEmpty()) {
        return expr;
    }
    LambdaExpr lambdaExpr = new LambdaExpr();
    lambdaExpr.setEnclosingParameters(true);
    if (!skipFirstParamAsThis) {
        lambdaExpr.addParameter(new Parameter(new UnknownType(), "_this"));
    }
    usedDeclarations.stream().map(s -> new Parameter(new UnknownType(), s)).forEach(lambdaExpr::addParameter);
    lambdaExpr.setBody(new ExpressionStmt(expr));
    return lambdaExpr;
}
Also used : UnknownType(org.drools.javaparser.ast.type.UnknownType) Expression(org.drools.javaparser.ast.expr.Expression) DrlxParseSuccess(org.drools.modelcompiler.builder.generator.drlxparse.DrlxParseSuccess) QueryGenerator(org.drools.modelcompiler.builder.generator.QueryGenerator) DrlxParseUtil(org.drools.modelcompiler.builder.generator.DrlxParseUtil) Optional.of(java.util.Optional.of) JavaParser(org.drools.javaparser.JavaParser) ArrayList(java.util.ArrayList) MethodCallExpr(org.drools.javaparser.ast.expr.MethodCallExpr) FieldAccessExpr(org.drools.javaparser.ast.expr.FieldAccessExpr) ExpressionStmt(org.drools.javaparser.ast.stmt.ExpressionStmt) DrlxParseUtil.toVar(org.drools.modelcompiler.builder.generator.DrlxParseUtil.toVar) LambdaExpr(org.drools.javaparser.ast.expr.LambdaExpr) EnclosedExpr(org.drools.javaparser.ast.expr.EnclosedExpr) Parameter(org.drools.javaparser.ast.body.Parameter) Collection(java.util.Collection) ClassExpr(org.drools.javaparser.ast.expr.ClassExpr) NameExpr(org.drools.javaparser.ast.expr.NameExpr) StringLiteralExpr(org.drools.javaparser.ast.expr.StringLiteralExpr) Objects(java.util.Objects) UnknownType(org.drools.javaparser.ast.type.UnknownType) IndexUtil(org.drools.core.util.index.IndexUtil) RuleContext(org.drools.modelcompiler.builder.generator.RuleContext) List(java.util.List) TypedExpression(org.drools.modelcompiler.builder.generator.TypedExpression) Stream(java.util.stream.Stream) Optional(java.util.Optional) LambdaExpr(org.drools.javaparser.ast.expr.LambdaExpr) Parameter(org.drools.javaparser.ast.body.Parameter) ExpressionStmt(org.drools.javaparser.ast.stmt.ExpressionStmt)

Example 8 with LambdaExpr

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

the class PatternExpressionBuilder method buildIndexedBy.

private Optional<MethodCallExpr> buildIndexedBy(DrlxParseSuccess drlxParseResult) {
    if (!hasIndex(drlxParseResult)) {
        return Optional.empty();
    }
    IndexUtil.ConstraintType decodeConstraintType = drlxParseResult.getDecodeConstraintType();
    TypedExpression left = drlxParseResult.getLeft();
    TypedExpression right = drlxParseResult.getRight();
    Class<?> indexType = Stream.of(left, right).map(TypedExpression::getType).filter(Objects::nonNull).findFirst().get();
    ClassExpr indexedBy_indexedClass = new ClassExpr(JavaParser.parseType(indexType.getCanonicalName()));
    // not 100% accurate as the type in "nameExpr" is actually parsed if it was JavaParsers as a big chain of FieldAccessExpr
    FieldAccessExpr indexedBy_constraintType = new FieldAccessExpr(new NameExpr("org.drools.model.Index.ConstraintType"), decodeConstraintType.toString());
    LambdaExpr indexedBy_leftOperandExtractor = new LambdaExpr();
    indexedBy_leftOperandExtractor.addParameter(new Parameter(new UnknownType(), "_this"));
    boolean leftContainsThis = left.getExpression().toString().contains("_this");
    indexedBy_leftOperandExtractor.setBody(new ExpressionStmt(leftContainsThis ? left.getExpression() : right.getExpression()));
    MethodCallExpr indexedByDSL = new MethodCallExpr(null, drlxParseResult.isBetaNode() ? BETA_INDEXED_BY_CALL : ALPHA_INDEXED_BY_CALL);
    indexedByDSL.addArgument(indexedBy_indexedClass);
    indexedByDSL.addArgument(indexedBy_constraintType);
    indexedByDSL.addArgument("" + indexIdGenerator.getFieldId(drlxParseResult.getPatternType(), left.getFieldName()));
    indexedByDSL.addArgument(indexedBy_leftOperandExtractor);
    Collection<String> usedDeclarations = drlxParseResult.getUsedDeclarations();
    if (isAlphaIndex(usedDeclarations)) {
        indexedByDSL.addArgument(right.getExpression());
    } else if (usedDeclarations.size() == 1) {
        LambdaExpr indexedBy_rightOperandExtractor = new LambdaExpr();
        indexedBy_rightOperandExtractor.addParameter(new Parameter(new UnknownType(), usedDeclarations.iterator().next()));
        indexedBy_rightOperandExtractor.setBody(new ExpressionStmt(!leftContainsThis ? left.getExpression() : right.getExpression()));
        indexedByDSL.addArgument(indexedBy_rightOperandExtractor);
    }
    return Optional.of(indexedByDSL);
}
Also used : IndexUtil(org.drools.core.util.index.IndexUtil) LambdaExpr(org.drools.javaparser.ast.expr.LambdaExpr) NameExpr(org.drools.javaparser.ast.expr.NameExpr) ExpressionStmt(org.drools.javaparser.ast.stmt.ExpressionStmt) UnknownType(org.drools.javaparser.ast.type.UnknownType) Objects(java.util.Objects) Parameter(org.drools.javaparser.ast.body.Parameter) ClassExpr(org.drools.javaparser.ast.expr.ClassExpr) FieldAccessExpr(org.drools.javaparser.ast.expr.FieldAccessExpr) TypedExpression(org.drools.modelcompiler.builder.generator.TypedExpression) MethodCallExpr(org.drools.javaparser.ast.expr.MethodCallExpr)

Aggregations

Parameter (org.drools.javaparser.ast.body.Parameter)8 LambdaExpr (org.drools.javaparser.ast.expr.LambdaExpr)8 MethodCallExpr (org.drools.javaparser.ast.expr.MethodCallExpr)8 NameExpr (org.drools.javaparser.ast.expr.NameExpr)8 Collection (java.util.Collection)6 List (java.util.List)6 Expression (org.drools.javaparser.ast.expr.Expression)6 UnknownType (org.drools.javaparser.ast.type.UnknownType)6 ArrayList (java.util.ArrayList)5 Optional (java.util.Optional)5 ClassExpr (org.drools.javaparser.ast.expr.ClassExpr)5 Objects (java.util.Objects)4 JavaParser (org.drools.javaparser.JavaParser)4 FieldAccessExpr (org.drools.javaparser.ast.expr.FieldAccessExpr)4 ExpressionStmt (org.drools.javaparser.ast.stmt.ExpressionStmt)4 PackageModel (org.drools.modelcompiler.builder.PackageModel)4 IndexUtil (org.drools.core.util.index.IndexUtil)3 AssignExpr (org.drools.javaparser.ast.expr.AssignExpr)3 DrlxParseUtil.toVar (org.drools.modelcompiler.builder.generator.DrlxParseUtil.toVar)3 RuleContext (org.drools.modelcompiler.builder.generator.RuleContext)3