Package com.apama.event.parser

See:
Description

Class Summary

BooleanFieldType	Represents the Apama boolean type, for which values are either Boolean.TRUE or Boolean.FALSE.
DecimalFieldType	Represents the Apama decimal type, for which values are specified as DecimalFieldValue objects.
DecimalFieldValue	Represents the value of an Apama decimal field.
DictionaryFieldType<K,V>	Represents the Apama dictionary<key,item> type, for which values are specified as Map objects.
EventParser	Provides the functionality to parse String objects into Apama Event objects, for any EventType registered with the parser.
EventType	Represents the definition of an Apama event type, for which values are specified as Event objects.
Field<T>	Represents the name and type of a field in an EventType.
FieldType<T>	Represents an Apama type.
FieldTypes	Provides factory methods and constants for getting all supported Apama event field types.
FloatFieldType	Represents the Apama float type, for which values are specified as Double objects.
IntegerFieldType	Represents the Apama integer type, for which values are specified as Long objects.
LocationFieldType	Represents the Apama location type, for which values are specified as LocationType objects.
LocationType	Represents the value of an Apama location type, consisting of of two (x,y) co-ordinates.
SequenceFieldType<E>	Represents the Apama sequence<type> type, for which values are specified as List objects.
StringFieldType	Represents the Apama string type, for which values are specified as String objects.

Exception Summary

ParserRuntimeException

ParserRuntimeException will be thrown when an error occurs while parsing an Apama event.

Package com.apama.event.parser Description

Represents the definition of an Apama event type, for which values are specified as Event objects. Each EventType consists of an event type name, and zero or more Field objects.

Example usage:

static final Field<String> FIELD_MY_STRING = FieldTypes.STRING.newField("myString");
static final Field<List<Double>> FIELD_MY_SEQ = FieldTypes.sequence(FieldTypes.FLOAT).newField("mySeq");
static final Field<Map<String,Long>> FIELD_MY_DICT = FieldTypes.dictionary(FieldTypes.STRING, FieldTypes.INTEGER).newField("myDict");

static final EventType EVENT_NESTED = new EventType("sample.NestedEvent", FIELD_MY_STRING);
static final Field<Event> FIELD_NESTED = EVENT_NESTED.newField("myNested");

static final EventType EVENT_MY_EVENT = new EventType("sample.MyEvent", FIELD_MY_STRING, FIELD_MY_SEQ, FIELD_MY_DICT, FIELD_NESTED);

static final EventParser EVENT_PARSER = new EventParser(EVENT_MY_EVENT);


public void demonstrateParsingAndGettingFieldValues()
{
        Event e = EVENT_PARSER.parse("sample.MyEvent(\"Hello\",[1.5,2.3],{\"myDictKey\":123},sample.NestedEvent(\"Nested Hello\"))");
        String myString = e.getField(FIELD_MY_STRING);
        List<Double> mySeq = e.getField(FIELD_MY_SEQ);
        Map<String,Long> myDict = e.getField(FIELD_MY_DICT);
        String myString2 = e.getField(FIELD_NESTED).getField(FIELD_MY_STRING);

        System.out.println("Field values: "+myString+", "+mySeq+", "+myDict+", "+myString2);
}

public void demonstrateSettingFieldValues()
{
        Event e = new Event(EVENT_MY_EVENT)
                .setField(FIELD_MY_STRING, "Hello")
                .setField(FIELD_MY_SEQ, Arrays.asList(1.5, 2.3D))
                .setField(FIELD_MY_DICT, Collections.singletonMap("myDictKey", 123L))
                .setField(FIELD_NESTED, 
                                new Event(EVENT_NESTED)
                                .setField(FIELD_MY_STRING, "Nested Hello")
                );
        String eventString = e.getText();
        System.out.println(eventString);
}