public AggregationMethodFactoryPlugIn(ExprPlugInAggNode parent,
AggregationFunctionFactory aggregationFunctionFactory, Type aggregatedValueType)
{
_parent = parent;
_aggregationFunctionFactory = aggregationFunctionFactory;
_aggregatedValueType = aggregatedValueType;
}
public AggregationMethodFactory MakePlugInMethod(
StatementExtensionSvcContext statementExtensionSvcContext,
ExprPlugInAggNode expr,
AggregationFunctionFactory factory,
Type childType)
{
return(new AggregationMethodFactoryPlugIn(expr, factory, childType));
}
public AggregationMethodFactoryPluginMethod(
ExprPlugInAggNode parent,
AggregationFunctionForge aggregationFunctionForge,
AggregationFunctionMode mode)
{
this.parent = parent;
this.aggregationFunctionForge = aggregationFunctionForge;
this.mode = mode;
}
public AggregationForgeFactoryPlugin(
ExprPlugInAggNode parent,
AggregationFunctionForge aggregationFunctionForge,
AggregationFunctionMode mode,
Type aggregatedValueType,
DataInputOutputSerdeForge distinctSerde)
{
this.parent = parent;
this.aggregationFunctionForge = aggregationFunctionForge;
this.mode = mode;
this.aggregatedValueType = aggregatedValueType;
this.distinctSerde = distinctSerde;
}
// Since static method calls such as "Class.method('a')" and mapped properties "Stream.property('key')"
// look the same, however as the validation could not resolve "Stream.property('key')" before calling this method,
// this method tries to resolve the mapped property as a static method.
// Assumes that this is an ExprIdentNode.
private static ExprNode ResolveStaticMethodOrField(
ExprIdentNode identNode,
ExprValidationException propertyException,
ExprValidationContext validationContext)
{
// Reconstruct the original string
StringBuilder mappedProperty = new StringBuilder(identNode.UnresolvedPropertyName);
if (identNode.StreamOrPropertyName != null) {
mappedProperty.Insert(0, identNode.StreamOrPropertyName + '.');
}
// Parse the mapped property format into a class name, method and single string parameter
MappedPropertyParseResult parse = ParseMappedProperty(mappedProperty.ToString());
if (parse == null) {
ExprConstantNode constNode = ResolveIdentAsEnumConst(
mappedProperty.ToString(),
validationContext.ImportService);
if (constNode == null) {
throw propertyException;
}
else {
return constNode;
}
}
// If there is a class name, assume a static method is possible.
if (parse.ClassName != null) {
IList<ExprNode> parameters =
Collections.SingletonList((ExprNode) new ExprConstantNodeImpl(parse.ArgString));
IList<ExprChainedSpec> chain = new List<ExprChainedSpec>();
chain.Add(new ExprChainedSpec(parse.ClassName, Collections.GetEmptyList<ExprNode>(), false));
chain.Add(new ExprChainedSpec(parse.MethodName, parameters, false));
ConfigurationCompilerExpression exprConfig =
validationContext.StatementCompileTimeService.Configuration.Compiler.Expression;
ExprNode result = new ExprDotNodeImpl(chain, exprConfig.IsDuckTyping, exprConfig.IsUdfCache);
// Validate
try {
result.Validate(validationContext);
}
catch (ExprValidationException e) {
throw new ExprValidationException(
$"Failed to resolve enumeration method, date-time method or mapped property '{mappedProperty}': {e.Message}",
e);
}
return result;
}
// There is no class name, try a single-row function
string functionName = parse.MethodName;
try {
Pair<Type, ImportSingleRowDesc> classMethodPair =
validationContext.ImportService.ResolveSingleRow(functionName);
IList<ExprNode> parameters =
Collections.SingletonList((ExprNode) new ExprConstantNodeImpl(parse.ArgString));
IList<ExprChainedSpec> chain = Collections.SingletonList(
new ExprChainedSpec(classMethodPair.Second.MethodName, parameters, false));
ExprNode result = new ExprPlugInSingleRowNode(
functionName,
classMethodPair.First,
chain,
classMethodPair.Second);
// Validate
try {
result.Validate(validationContext);
}
catch (EPException) {
throw;
}
catch (Exception ex) {
throw new ExprValidationException(
"Plug-in aggregation function '" + parse.MethodName + "' failed validation: " + ex.Message);
}
return result;
}
catch (ImportUndefinedException) {
// Not an single-row function
}
catch (ImportException e) {
throw new IllegalStateException("Error resolving single-row function: " + e.Message, e);
}
// Try an aggregation function factory
try {
AggregationFunctionForge aggregationForge =
validationContext.ImportService.ResolveAggregationFunction(parse.MethodName);
ExprNode result = new ExprPlugInAggNode(false, aggregationForge, parse.MethodName);
result.AddChildNode(new ExprConstantNodeImpl(parse.ArgString));
// Validate
try {
result.Validate(validationContext);
}
catch (EPException) {
throw;
}
catch (Exception e) {
throw new ExprValidationException(
"Plug-in aggregation function '" + parse.MethodName + "' failed validation: " + e.Message);
}
return result;
}
catch (ImportUndefinedException) {
// Not an aggregation function
}
catch (ImportException e) {
throw new IllegalStateException("Error resolving aggregation: " + e.Message, e);
}
// absolutely cannot be resolved
throw propertyException;
}