Examples with ExpressionNode org.apache.hadoop.hbase.security.visibility.expression.ExpressionNode used on opensource projects

Example 1 with ExpressionNode

use of org.apache.hadoop.hbase.security.visibility.expression.ExpressionNode in project hbase by apache.

the class ExpressionExpander method negate.

private ExpressionNode negate(NonLeafExpressionNode nlExp) {
    ExpressionNode notChild = nlExp.getChildExps().get(0);
    if (notChild instanceof LeafExpressionNode) {
        return nlExp;
    }
    NonLeafExpressionNode nlNotChild = (NonLeafExpressionNode) notChild;
    if (nlNotChild.getOperator() == Operator.NOT) {
        // negate the negate
        return nlNotChild.getChildExps().get(0);
    }
    Operator negateOp = nlNotChild.getOperator() == Operator.AND ? Operator.OR : Operator.AND;
    NonLeafExpressionNode newNode = new NonLeafExpressionNode(negateOp);
    for (ExpressionNode expNode : nlNotChild.getChildExps()) {
        NonLeafExpressionNode negateNode = new NonLeafExpressionNode(Operator.NOT);
        negateNode.addChildExp(expNode.deepClone());
        newNode.addChildExp(expand(negateNode));
    }
    return newNode;
}

Example 2 with ExpressionNode

use of org.apache.hadoop.hbase.security.visibility.expression.ExpressionNode in project hbase by apache.

the class ExpressionExpander method expandNonLeaf.

private NonLeafExpressionNode expandNonLeaf(NonLeafExpressionNode newNode, Operator outerOp) {
    // Now go for the merge or expansion across brackets
    List<ExpressionNode> newChildExps = newNode.getChildExps();
    assert newChildExps.size() == 2;
    ExpressionNode leftChild = newChildExps.get(0);
    ExpressionNode rightChild = newChildExps.get(1);
    if (rightChild.isSingleNode()) {
        // Merge the single right node into the left side
        assert leftChild instanceof NonLeafExpressionNode;
        newNode = mergeChildNodes(newNode, outerOp, rightChild, (NonLeafExpressionNode) leftChild);
    } else if (leftChild.isSingleNode()) {
        // Merge the single left node into the right side
        assert rightChild instanceof NonLeafExpressionNode;
        newNode = mergeChildNodes(newNode, outerOp, leftChild, (NonLeafExpressionNode) rightChild);
    } else {
        // Both the child exp nodes are non single.
        NonLeafExpressionNode leftChildNLE = (NonLeafExpressionNode) leftChild;
        NonLeafExpressionNode rightChildNLE = (NonLeafExpressionNode) rightChild;
        if (outerOp == leftChildNLE.getOperator() && outerOp == rightChildNLE.getOperator()) {
            // Merge
            NonLeafExpressionNode leftChildNLEClone = leftChildNLE.deepClone();
            leftChildNLEClone.addChildExps(rightChildNLE.getChildExps());
            newNode = leftChildNLEClone;
        } else {
            // (a | b) & (c & d) ...
            if (outerOp == Operator.OR) {
                // (a | b) | (c & d)
                if (leftChildNLE.getOperator() == Operator.OR && rightChildNLE.getOperator() == Operator.AND) {
                    leftChildNLE.addChildExp(rightChildNLE);
                    newNode = leftChildNLE;
                } else if (leftChildNLE.getOperator() == Operator.AND && rightChildNLE.getOperator() == Operator.OR) {
                    // (a & b) | (c | d)
                    rightChildNLE.addChildExp(leftChildNLE);
                    newNode = rightChildNLE;
                }
            // (a & b) | (c & d)
            // This case no need to do any thing
            } else {
                // (a | b) & (c & d) => (a & c & d) | (b & c & d)
                if (leftChildNLE.getOperator() == Operator.OR && rightChildNLE.getOperator() == Operator.AND) {
                    newNode = new NonLeafExpressionNode(Operator.OR);
                    for (ExpressionNode exp : leftChildNLE.getChildExps()) {
                        NonLeafExpressionNode rightChildNLEClone = rightChildNLE.deepClone();
                        rightChildNLEClone.addChildExp(exp);
                        newNode.addChildExp(rightChildNLEClone);
                    }
                } else if (leftChildNLE.getOperator() == Operator.AND && rightChildNLE.getOperator() == Operator.OR) {
                    // (a & b) & (c | d) => (a & b & c) | (a & b & d)
                    newNode = new NonLeafExpressionNode(Operator.OR);
                    for (ExpressionNode exp : rightChildNLE.getChildExps()) {
                        NonLeafExpressionNode leftChildNLEClone = leftChildNLE.deepClone();
                        leftChildNLEClone.addChildExp(exp);
                        newNode.addChildExp(leftChildNLEClone);
                    }
                } else {
                    // (a | b) & (c | d) => (a & c) | (a & d) | (b & c) | (b & d)
                    newNode = new NonLeafExpressionNode(Operator.OR);
                    for (ExpressionNode leftExp : leftChildNLE.getChildExps()) {
                        for (ExpressionNode rightExp : rightChildNLE.getChildExps()) {
                            NonLeafExpressionNode newChild = new NonLeafExpressionNode(Operator.AND);
                            newChild.addChildExp(leftExp.deepClone());
                            newChild.addChildExp(rightExp.deepClone());
                            newNode.addChildExp(newChild);
                        }
                    }
                }
            }
        }
    }
    return newNode;
}

Example 3 with ExpressionNode

use of org.apache.hadoop.hbase.security.visibility.expression.ExpressionNode in project hbase by apache.

the class ExpressionExpander method mergeChildNodes.

private NonLeafExpressionNode mergeChildNodes(NonLeafExpressionNode newOuterNode, Operator outerOp, ExpressionNode lChild, NonLeafExpressionNode nlChild) {
    // Merge the single right/left node into the other side
    if (nlChild.getOperator() == outerOp) {
        NonLeafExpressionNode leftChildNLEClone = nlChild.deepClone();
        leftChildNLEClone.addChildExp(lChild);
        newOuterNode = leftChildNLEClone;
    } else if (outerOp == Operator.AND) {
        assert nlChild.getOperator() == Operator.OR;
        // outerOp is & here. We need to expand the node here
        // (a | b) & c -> (a & c) | (b & c)
        // OR
        // c & (a | b) -> (c & a) | (c & b)
        newOuterNode = new NonLeafExpressionNode(Operator.OR);
        for (ExpressionNode exp : nlChild.getChildExps()) {
            newOuterNode.addChildExp(new NonLeafExpressionNode(Operator.AND, exp, lChild));
        }
    }
    return newOuterNode;
}

Example 4 with ExpressionNode

use of org.apache.hadoop.hbase.security.visibility.expression.ExpressionNode in project hbase by apache.

the class ExpressionParser method processCloseParan.

private void processCloseParan(Stack<ExpressionNode> expStack, String expS, int index) throws ParseException {
    if (expStack.size() < 2) {
        // in stack.
        throw new ParseException();
    } else {
        ExpressionNode top = expStack.pop();
        ExpressionNode secondTop = expStack.pop();
        // any thing else
        if (top == LeafExpressionNode.OPEN_PARAN_NODE || secondTop != LeafExpressionNode.OPEN_PARAN_NODE) {
            throw new ParseException("Error parsing expression " + expS + " at column : " + index);
        }
        // (a&) is not valid.
        if (top instanceof NonLeafExpressionNode) {
            NonLeafExpressionNode nlTop = (NonLeafExpressionNode) top;
            if ((nlTop.getOperator() == Operator.NOT && nlTop.getChildExps().size() != 1) || (nlTop.getOperator() != Operator.NOT && nlTop.getChildExps().size() != 2)) {
                throw new ParseException("Error parsing expression " + expS + " at column : " + index);
            }
        }
        // node.
        if (!expStack.isEmpty()) {
            ExpressionNode thirdTop = expStack.peek();
            if (thirdTop instanceof NonLeafExpressionNode) {
                NonLeafExpressionNode nlThirdTop = (NonLeafExpressionNode) expStack.pop();
                nlThirdTop.addChildExp(top);
                if (nlThirdTop.getOperator() == Operator.NOT) {
                    // completed NOT can be added now.
                    if (!expStack.isEmpty()) {
                        ExpressionNode fourthTop = expStack.peek();
                        if (fourthTop instanceof NonLeafExpressionNode) {
                            // Its Operator will be OR or AND
                            NonLeafExpressionNode nlFourthTop = (NonLeafExpressionNode) fourthTop;
                            assert nlFourthTop.getOperator() != Operator.NOT;
                            // Also for sure its number of children will be 1
                            assert nlFourthTop.getChildExps().size() == 1;
                            nlFourthTop.addChildExp(nlThirdTop);
                            // This case no need to add back the nlThirdTop.
                            return;
                        }
                    }
                }
                top = nlThirdTop;
            }
        }
        expStack.push(top);
    }
}

Example 5 with ExpressionNode

use of org.apache.hadoop.hbase.security.visibility.expression.ExpressionNode in project hbase by apache.

the class VisibilityUtils method getLabelOrdinals.

private static void getLabelOrdinals(ExpressionNode node, List<Integer> labelOrdinals, Set<Integer> auths, boolean checkAuths, VisibilityLabelOrdinalProvider ordinalProvider) throws IOException, InvalidLabelException {
    if (node.isSingleNode()) {
        String identifier = null;
        int labelOrdinal = 0;
        if (node instanceof LeafExpressionNode) {
            identifier = ((LeafExpressionNode) node).getIdentifier();
            if (LOG.isTraceEnabled()) {
                LOG.trace("The identifier is " + identifier);
            }
            labelOrdinal = ordinalProvider.getLabelOrdinal(identifier);
            checkAuths(auths, labelOrdinal, identifier, checkAuths);
        } else {
            // This is a NOT node.
            LeafExpressionNode lNode = (LeafExpressionNode) ((NonLeafExpressionNode) node).getChildExps().get(0);
            identifier = lNode.getIdentifier();
            labelOrdinal = ordinalProvider.getLabelOrdinal(identifier);
            checkAuths(auths, labelOrdinal, identifier, checkAuths);
            // Store NOT node as -ve ordinal.
            labelOrdinal = -1 * labelOrdinal;
        }
        if (labelOrdinal == 0) {
            throw new InvalidLabelException("Invalid visibility label " + identifier);
        }
        labelOrdinals.add(labelOrdinal);
    } else {
        List<ExpressionNode> childExps = ((NonLeafExpressionNode) node).getChildExps();
        for (ExpressionNode child : childExps) {
            getLabelOrdinals(child, labelOrdinals, auths, checkAuths, ordinalProvider);
        }
    }
}