org.apache.nifi.hl7.query

Class HL7Query

java.lang.Object

org.apache.nifi.hl7.query.HL7Query

public class HL7Query
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
private Set<Declaration>	declarations
private String	query
private List<Selection>	selections
private org.antlr.runtime.tree.Tree	tree
private BooleanEvaluator	whereEvaluator

Constructor Summary

Constructors

Modifier	Constructor and Description
private	HL7Query(org.antlr.runtime.tree.Tree tree, String query)

Method Summary

Modifier and Type	Method and Description
(package private) static Map<String,Object>	assignAliases(LinkedHashMap<String,List<Object>> possibleValues, int iteration) assigns one of the possible values to each alias, based on which iteration this is.
private BooleanEvaluator	buildBooleanEvaluator(org.antlr.runtime.tree.Tree tree)
private IntegerEvaluator	buildIntegerEvaluator(org.antlr.runtime.tree.Tree tree)
private Evaluator<?>	buildReferenceEvaluator(org.antlr.runtime.tree.Tree tree)
static HL7Query	compile(String query)
private static org.antlr.runtime.CommonTokenStream	createTokenStream(String expression)
QueryResult	evaluate(HL7Message message)
String	getQuery()
List<Class<?>>	getReturnTypes()
private String	getSelectedName(org.antlr.runtime.tree.Tree selectable)
(package private) org.antlr.runtime.tree.Tree	getTree()
private void	processDeclare(org.antlr.runtime.tree.Tree declare)
private List<Selection>	processSelect(org.antlr.runtime.tree.Tree select)
private BooleanEvaluator	processWhere(org.antlr.runtime.tree.Tree where)
String	toString()
String	toTreeString()
private void	toTreeString(org.antlr.runtime.tree.Tree tree, StringBuilder sb, int indentLevel)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

tree

private final org.antlr.runtime.tree.Tree tree

query

private final String query

declarations

private final Set<Declaration> declarations

selections

private final List<Selection> selections

whereEvaluator

private final BooleanEvaluator whereEvaluator

Constructor Detail

HL7Query

private HL7Query(org.antlr.runtime.tree.Tree tree,
                 String query)

Method Detail

processDeclare

private void processDeclare(org.antlr.runtime.tree.Tree declare)

processSelect

private List<Selection> processSelect(org.antlr.runtime.tree.Tree select)

getSelectedName

private String getSelectedName(org.antlr.runtime.tree.Tree selectable)

processWhere

private BooleanEvaluator processWhere(org.antlr.runtime.tree.Tree where)

buildReferenceEvaluator

private Evaluator<?> buildReferenceEvaluator(org.antlr.runtime.tree.Tree tree)

buildIntegerEvaluator

private IntegerEvaluator buildIntegerEvaluator(org.antlr.runtime.tree.Tree tree)

buildBooleanEvaluator

private BooleanEvaluator buildBooleanEvaluator(org.antlr.runtime.tree.Tree tree)

getTree

org.antlr.runtime.tree.Tree getTree()

getQuery

public String getQuery()

toString

public String toString()

Overrides:

toString in class Object

compile

public static HL7Query compile(String query)

createTokenStream

private static org.antlr.runtime.CommonTokenStream createTokenStream(String expression)
                                                              throws HL7QueryParsingException

Throws:

HL7QueryParsingException

getReturnTypes

public List<Class<?>> getReturnTypes()

evaluate

public QueryResult evaluate(HL7Message message)

assignAliases

static Map<String,Object> assignAliases(LinkedHashMap<String,List<Object>> possibleValues,
                                        int iteration)

assigns one of the possible values to each alias, based on which iteration this is. require LinkedHashMap just to be very clear and explicit that the order of the Map MUST be guaranteed between multiple invocations of this method. package protected for testing visibility

toTreeString

public String toTreeString()

toTreeString

private void toTreeString(org.antlr.runtime.tree.Tree tree,
                          StringBuilder sb,
                          int indentLevel)