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…1994) * refactor(#1960): Refactor transformation rules, add schema restore * Fix import order * Extract transformation rule priorities to enum * Add comment to skipped rules in stateful transformation visitor
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56 changes: 56 additions & 0 deletions
56
...org/apache/streampipes/connect/shared/preprocessing/SupportsNestedTransformationRule.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| */ | ||
|
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| package org.apache.streampipes.connect.shared.preprocessing; | ||
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| import org.apache.streampipes.connect.shared.preprocessing.transform.TransformationRule; | ||
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| import java.util.List; | ||
| import java.util.Map; | ||
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| public abstract class SupportsNestedTransformationRule implements TransformationRule { | ||
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| @Override | ||
| public Map<String, Object> apply(Map<String, Object> event) { | ||
| return applyNested(event, getEventKeys()); | ||
| } | ||
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| protected Map<String, Object> applyNested(Map<String, Object> event, | ||
| List<String> eventKey) { | ||
| if (eventKey.size() == 1) { | ||
| applyTransformation(event, eventKey); | ||
| } else { | ||
| String key = eventKey.get(0); | ||
| List<String> newKeysTmpList = eventKey.subList(1, eventKey.size()); | ||
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| Map<String, Object> newSubEvent = | ||
| applyNested((Map<String, Object>) event.get(eventKey.get(0)), newKeysTmpList); | ||
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| event.remove(key); | ||
| event.put(key, newSubEvent); | ||
| } | ||
| return event; | ||
| } | ||
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| protected abstract List<String> getEventKeys(); | ||
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| protected abstract void applyTransformation(Map<String, Object> event, | ||
| List<String> eventKey); | ||
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| } |
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67 changes: 67 additions & 0 deletions
67
...ain/java/org/apache/streampipes/connect/shared/preprocessing/convert/SchemaConverter.java
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| @@ -0,0 +1,67 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| */ | ||
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| package org.apache.streampipes.connect.shared.preprocessing.convert; | ||
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| import org.apache.streampipes.model.connect.rules.TransformationRuleDescription; | ||
| import org.apache.streampipes.model.schema.EventSchema; | ||
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| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.Comparator; | ||
| import java.util.List; | ||
| import java.util.stream.Collectors; | ||
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| public class SchemaConverter { | ||
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| public EventSchema toOriginalSchema(EventSchema transformedSchema, | ||
| List<TransformationRuleDescription> transformationRules) { | ||
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| var converter = new ToOriginalSchemaConverter( | ||
| transformedSchema.getEventProperties() | ||
| ); | ||
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| return transform(transformationRules, converter, true); | ||
| } | ||
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| public EventSchema toTransformedSchema(EventSchema originalSchema, | ||
| List<TransformationRuleDescription> transformationRules) { | ||
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| var converter = new ToTransformedSchemaConverter( | ||
| originalSchema.getEventProperties() | ||
| ); | ||
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| return transform(transformationRules, converter, false); | ||
| } | ||
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| private EventSchema transform(List<TransformationRuleDescription> transformationRules, | ||
| ProvidesConversionResult converter, | ||
| boolean reverseRules) { | ||
| var rules = transformationRules | ||
| .stream() | ||
| .sorted(Comparator.comparingInt(TransformationRuleDescription::getRulePriority)) | ||
| .collect(Collectors.toCollection(ArrayList::new)); | ||
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| if (reverseRules) { | ||
| Collections.reverse(rules); | ||
| } | ||
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| rules.forEach(rule -> rule.accept(converter)); | ||
| return new EventSchema(converter.getTransformedProperties()); | ||
| } | ||
| } |
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