/// full scan private ArrayList<JsonObject> FullScan(FilterExpression expression) { ArrayList<JsonObject> list = new ArrayList<JsonObject>(); String globalName = Utils.TableNameToGlobalsName( TableName + SchemaManager.Instance().GetProjectPrefix(ProjectId)); NodeReference node = ConnectionManager.Instance().getConnection().createNodeReference(globalName); Long key = (long) 0; while (true) { String strKey = node.nextSubscript(key); if (strKey.equals("")) break; key = Long.parseLong(strKey); String nodeValue = node.getObject(key, "JSON").toString(); JsonObject obj = new JsonParser().parse(nodeValue).getAsJsonObject(); if (expression == null) { list.add(obj); } else { if (expression.IsValid(obj)) { list.add(obj); } } } return list; }
/// filter sub set private ArrayList<JsonObject> ScanSet(FilterExpression expression, ArrayList<Long> setToScan) { ArrayList<JsonObject> list = new ArrayList<JsonObject>(); String globalName = Utils.TableNameToGlobalsName( TableName + SchemaManager.Instance().GetProjectPrefix(ProjectId)); NodeReference node = ConnectionManager.Instance().getConnection().createNodeReference(globalName); for (int i = 0; i < setToScan.size(); i++) { String nodeValue = node.getObject(setToScan.get(i), "JSON").toString(); JsonObject obj = new JsonParser().parse(nodeValue).getAsJsonObject(); if (expression == null) { list.add(obj); } else { if (expression.IsValid(obj)) { list.add(obj); } } } return list; }
/** * @param result * @param expr */ private static void serialize( FastStringBuffer result, Expression expr, Map reversePrefixMapping) { if (expr instanceof Assignation) { // XXX not yet supported } else if (expr instanceof AxisExpression) { AxisExpression axisExpression = (AxisExpression) expr; result.append(Axis.axisName[axisExpression.getAxis()]); result.append("::"); final NodeTest nodeTest = axisExpression.getNodeTest(); if (nodeTest == null) { result.append("node()"); } else { result.append(fixPreFixes(nodeTest.toString(), reversePrefixMapping)); } } else if (expr instanceof BinaryExpression) { BinaryExpression binaryExpression = (BinaryExpression) expr; result.append('('); serialize(result, binaryExpression.getOperands()[0], reversePrefixMapping); result.append(Token.tokens[binaryExpression.getOperator()]); serialize(result, binaryExpression.getOperands()[1], reversePrefixMapping); result.append(')'); } else if (expr instanceof CompareToIntegerConstant) { CompareToIntegerConstant compareToIntegerConstant = (CompareToIntegerConstant) expr; result.append('('); serialize(result, compareToIntegerConstant.getOperand(), reversePrefixMapping); result.append(Token.tokens[compareToIntegerConstant.getComparisonOperator()]); result.append(Long.toString(compareToIntegerConstant.getComparand())); result.append(')'); } else if (expr instanceof ConditionalSorter) { // XXX not yet supported } else if (expr instanceof ContextItemExpression) { result.append('.'); } else if (expr instanceof ErrorExpression) { // Error do nothing } else if (expr instanceof FilterExpression) { FilterExpression filterExpression = (FilterExpression) expr; result.append('('); serialize(result, filterExpression.getControllingExpression(), reversePrefixMapping); result.append('['); serialize(result, filterExpression.getFilter(), reversePrefixMapping); result.append("])"); } else if (expr instanceof FunctionCall) { FunctionCall functionCall = (FunctionCall) expr; StructuredQName name = functionCall.getFunctionName(); if (name.getPrefix() != null && name.getPrefix().length() > 0) { result.append(name.getPrefix()); result.append(":"); } result.append(name.getLocalName()); result.append("("); Iterator iter = functionCall.iterateSubExpressions(); boolean first = true; while (iter.hasNext()) { result.append(first ? "" : ", "); SaxonXPathExpressionSerializer.serialize( result, (Expression) iter.next(), reversePrefixMapping); first = false; } result.append(")"); } else if (expr instanceof Instruction) { // This is not an XPath expression } else if (expr instanceof IntegerRangeTest) { // XXX not yet supported } else if (expr instanceof IsLastExpression) { result.append("position() eq last()"); } else if (expr instanceof Literal) { Literal literal = (Literal) expr; result.append(literal.getValue().toString()); } else if (expr instanceof NumberInstruction) { // This is not an XPath expression } else if (expr instanceof PathExpression) { PathExpression pathExpression = (PathExpression) expr; result.append('('); serialize(result, pathExpression.getControllingExpression(), reversePrefixMapping); result.append('/'); serialize(result, pathExpression.getControlledExpression(), reversePrefixMapping); result.append(')'); } else if (expr instanceof PatternMatchExpression) { // XXX not yet supported } else if (expr instanceof PatternSponsor) { // XXX not yet supported } else if (expr instanceof SimpleContentConstructor) { // This is not an XPath expression } else if (expr instanceof SimpleExpression) { // This is not an XPath expression } /* else if (expr instanceof SimpleMappingExpression) { // XXX not yet supported } */ else if (expr instanceof ParentNodeExpression) { result.append(".."); } else if (expr instanceof RootExpression) { // do nothing } else if (expr instanceof SortExpression) { // XXX not yet supported } else if (expr instanceof TailExpression) { // XXX not yet supported } else if (expr instanceof TupleExpression) { // This is not an XPath expression } else if (expr instanceof TupleSorter) { // This is not an XPath expression } else if (expr instanceof UnaryExpression) { UnaryExpression unaryExpression = (UnaryExpression) expr; serialize( result, unaryExpression.getBaseExpression(), reversePrefixMapping); // Not sure if this is correct in all cases } else if (expr instanceof VariableReference) { VariableReference variableReference = (VariableReference) expr; String d = variableReference.getDisplayName(); result.append("$"); result.append(d == null ? "$" : d); } }