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Diffstat (limited to 'subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/aggregations/IAggregatorFactory.java')
-rw-r--r-- | subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/aggregations/IAggregatorFactory.java | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/aggregations/IAggregatorFactory.java b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/aggregations/IAggregatorFactory.java new file mode 100644 index 00000000..c970bd6a --- /dev/null +++ b/subprojects/viatra-runtime/src/main/java/tools/refinery/viatra/runtime/matchers/psystem/aggregations/IAggregatorFactory.java | |||
@@ -0,0 +1,40 @@ | |||
1 | /******************************************************************************* | ||
2 | * Copyright (c) 2010-2016, Zoltan Ujhelyi, Tamas Szabo, Istvan Rath and Daniel Varro | ||
3 | * This program and the accompanying materials are made available under the | ||
4 | * terms of the Eclipse Public License v. 2.0 which is available at | ||
5 | * http://www.eclipse.org/legal/epl-v20.html. | ||
6 | * | ||
7 | * SPDX-License-Identifier: EPL-2.0 | ||
8 | *******************************************************************************/ | ||
9 | package tools.refinery.viatra.runtime.matchers.psystem.aggregations; | ||
10 | |||
11 | /** | ||
12 | * | ||
13 | * Describes an aggregation operator keyword, potentially with type polymorphism. The actual runtime | ||
14 | * {@link IMultisetAggregationOperator} that implements the aggregation logic may depend on the type context. | ||
15 | * | ||
16 | * <p> | ||
17 | * Implementors are suggested to use lower-case classnames (as it will end up in the language) and are required use the | ||
18 | * annotation {@link AggregatorType} to indicate type inference rules. | ||
19 | * | ||
20 | * <p> | ||
21 | * <strong>Important!</strong> Implemented aggregators must be (1) deterministic (2) pure and (3)support incremental | ||
22 | * value updates in the internal operation. | ||
23 | * | ||
24 | * @author Zoltan Ujhelyi | ||
25 | * @since 1.4 | ||
26 | */ | ||
27 | |||
28 | public interface IAggregatorFactory { | ||
29 | |||
30 | /** | ||
31 | * Given type parameters selected from {@link AggregatorType} annotations, returns a run-time aggregator operator | ||
32 | * that is bound to the actual types. | ||
33 | * | ||
34 | * @param domainClass | ||
35 | * Java type of the values that are being aggregated | ||
36 | * @return the actual run-time aggregator logic, with type bindings | ||
37 | */ | ||
38 | public BoundAggregator getAggregatorLogic(Class<?> domainClass); | ||
39 | |||
40 | } | ||