Examples with RelationalExprDescr org.drools.drl.ast.descr.RelationalExprDescr used on opensource projects

Example 1 with RelationalExprDescr

use of org.drools.drl.ast.descr.RelationalExprDescr in project drools by kiegroup.

the class DRLExprParserTest method testDeepBinding.

@Test
public void testDeepBinding() throws Exception {
    String source = "($a : a > $b : b[10].prop || 10 != 20) && $x : someMethod(10) == 20";
    ConstraintConnectiveDescr result = parser.parse(source);
    assertFalse(parser.getErrors().toString(), parser.hasErrors());
    assertEquals(ConnectiveType.AND, result.getConnective());
    assertEquals(2, result.getDescrs().size());
    ConstraintConnectiveDescr or = (ConstraintConnectiveDescr) result.getDescrs().get(0);
    assertEquals(ConnectiveType.OR, or.getConnective());
    assertEquals(2, or.getDescrs().size());
    RelationalExprDescr expr = (RelationalExprDescr) or.getDescrs().get(0);
    assertEquals(">", expr.getOperator());
    BindingDescr leftBind = (BindingDescr) expr.getLeft();
    BindingDescr rightBind = (BindingDescr) expr.getRight();
    assertEquals("$a", leftBind.getVariable());
    assertEquals("a", leftBind.getExpression());
    assertEquals("$b", rightBind.getVariable());
    assertEquals("b[10].prop", rightBind.getExpression());
    expr = (RelationalExprDescr) or.getDescrs().get(1);
    assertEquals("!=", expr.getOperator());
    AtomicExprDescr leftExpr = (AtomicExprDescr) expr.getLeft();
    AtomicExprDescr rightExpr = (AtomicExprDescr) expr.getRight();
    assertEquals("10", leftExpr.getExpression());
    assertEquals("20", rightExpr.getExpression());
    expr = (RelationalExprDescr) result.getDescrs().get(1);
    assertEquals("==", expr.getOperator());
    leftBind = (BindingDescr) expr.getLeft();
    rightExpr = (AtomicExprDescr) expr.getRight();
    assertEquals("$x", leftBind.getVariable());
    assertEquals("someMethod(10)", leftBind.getExpression());
    assertEquals("20", rightExpr.getExpression());
}

Example 2 with RelationalExprDescr

use of org.drools.drl.ast.descr.RelationalExprDescr in project drools by kiegroup.

the class DRLExprParserTest method testNestedExpression.

@Test(timeout = 10000L)
public void testNestedExpression() throws Exception {
    // DROOLS-982
    String source = "(((((((((((((((((((((((((((((((((((((((((((((((((( a > b ))))))))))))))))))))))))))))))))))))))))))))))))))";
    ConstraintConnectiveDescr result = parser.parse(source);
    assertFalse(parser.getErrors().toString(), parser.hasErrors());
    assertEquals(ConnectiveType.AND, result.getConnective());
    assertEquals(1, result.getDescrs().size());
    RelationalExprDescr expr = (RelationalExprDescr) result.getDescrs().get(0);
    assertEquals(">", expr.getOperator());
    AtomicExprDescr left = (AtomicExprDescr) expr.getLeft();
    AtomicExprDescr right = (AtomicExprDescr) expr.getRight();
    assertEquals("a", left.getExpression());
    assertEquals("b", right.getExpression());
}

Example 3 with RelationalExprDescr

use of org.drools.drl.ast.descr.RelationalExprDescr in project drools by kiegroup.

the class DRLExprParserTest method testBindingWithRestrictions.

@Test
public void testBindingWithRestrictions() throws Exception {
    String source = "$x : property > value && < 20";
    ConstraintConnectiveDescr result = parser.parse(source);
    assertFalse(parser.getErrors().toString(), parser.hasErrors());
    assertEquals(ConnectiveType.AND, result.getConnective());
    assertEquals(2, result.getDescrs().size());
    RelationalExprDescr rel = (RelationalExprDescr) result.getDescrs().get(0);
    assertEquals(">", rel.getOperator());
    BindingDescr bind = (BindingDescr) rel.getLeft();
    assertEquals("$x", bind.getVariable());
    assertEquals("property", bind.getExpression());
    AtomicExprDescr right = (AtomicExprDescr) rel.getRight();
    assertEquals("value", right.getExpression());
    rel = (RelationalExprDescr) result.getDescrs().get(1);
    assertEquals("<", rel.getOperator());
    AtomicExprDescr left = (AtomicExprDescr) rel.getLeft();
    assertEquals("property", left.getExpression());
    right = (AtomicExprDescr) rel.getRight();
    assertEquals("20", right.getExpression());
}

Example 4 with RelationalExprDescr

use of org.drools.drl.ast.descr.RelationalExprDescr in project drools by kiegroup.

the class DRLExprParserTest method testConnective2.

@Test
public void testConnective2() throws Exception {
    String source = "(a > b || 10 != 20) && someMethod(10) == 20";
    ConstraintConnectiveDescr result = parser.parse(source);
    assertFalse(parser.getErrors().toString(), parser.hasErrors());
    assertEquals(ConnectiveType.AND, result.getConnective());
    assertEquals(2, result.getDescrs().size());
    ConstraintConnectiveDescr or = (ConstraintConnectiveDescr) result.getDescrs().get(0);
    assertEquals(ConnectiveType.OR, or.getConnective());
    assertEquals(2, or.getDescrs().size());
    RelationalExprDescr expr = (RelationalExprDescr) or.getDescrs().get(0);
    assertEquals(">", expr.getOperator());
    AtomicExprDescr left = (AtomicExprDescr) expr.getLeft();
    AtomicExprDescr right = (AtomicExprDescr) expr.getRight();
    assertEquals("a", left.getExpression());
    assertEquals("b", right.getExpression());
    expr = (RelationalExprDescr) or.getDescrs().get(1);
    assertEquals("!=", expr.getOperator());
    left = (AtomicExprDescr) expr.getLeft();
    right = (AtomicExprDescr) expr.getRight();
    assertEquals("10", left.getExpression());
    assertEquals("20", right.getExpression());
    expr = (RelationalExprDescr) result.getDescrs().get(1);
    assertEquals("==", expr.getOperator());
    left = (AtomicExprDescr) expr.getLeft();
    right = (AtomicExprDescr) expr.getRight();
    assertEquals("someMethod(10)", left.getExpression());
    assertEquals("20", right.getExpression());
}

Example 5 with RelationalExprDescr

use of org.drools.drl.ast.descr.RelationalExprDescr in project drools by kiegroup.

the class PatternBuilder method rewriteCompositeExpressions.

private String rewriteCompositeExpressions(RuleBuildContext context, Pattern pattern, ConstraintConnectiveDescr d) {
    int i = 0;
    StringBuilder sb = new StringBuilder();
    for (BaseDescr subDescr : d.getDescrs()) {
        if (subDescr instanceof BindingDescr) {
            continue;
        }
        if (i++ > 0) {
            sb.append(" ").append(d.getConnective().getConnective()).append(" ");
        }
        String normalizedExpr;
        if (subDescr instanceof RelationalExprDescr && isSimpleExpr((RelationalExprDescr) subDescr)) {
            RelationalExprDescr relDescr = (RelationalExprDescr) subDescr;
            if (relDescr.getExpression() != null) {
                normalizedExpr = normalizeExpression(context, pattern, relDescr, relDescr.getExpression());
            } else {
                i--;
                normalizedExpr = "";
            }
        } else if (subDescr instanceof ConstraintConnectiveDescr) {
            String rewrittenExpr = rewriteCompositeExpressions(context, pattern, (ConstraintConnectiveDescr) subDescr);
            if (rewrittenExpr == null) {
                return null;
            }
            normalizedExpr = "(" + rewrittenExpr + ")";
        } else if (subDescr instanceof AtomicExprDescr) {
            normalizedExpr = ((AtomicExprDescr) subDescr).getRewrittenExpression();
        } else {
            return null;
        }
        sb.append(normalizedExpr);
    }
    return sb.toString();
}