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NIFI-12773: Added join and anchored RecordPath function
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80 changes: 80 additions & 0 deletions
80
...ommons/nifi-record-path/src/main/java/org/apache/nifi/record/path/functions/Anchored.java
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|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /* | ||
| * 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.nifi.record.path.functions; | ||
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| import org.apache.nifi.record.path.FieldValue; | ||
| import org.apache.nifi.record.path.RecordPathEvaluationContext; | ||
| import org.apache.nifi.record.path.StandardRecordPathEvaluationContext; | ||
| import org.apache.nifi.record.path.paths.RecordPathSegment; | ||
| import org.apache.nifi.serialization.record.Record; | ||
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| import java.util.Arrays; | ||
| import java.util.stream.Stream; | ||
| import java.util.stream.StreamSupport; | ||
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| public class Anchored extends RecordPathSegment { | ||
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| private final RecordPathSegment anchorPath; | ||
| private final RecordPathSegment evaluationPath; | ||
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| public Anchored(final RecordPathSegment anchorPath, final RecordPathSegment evaluationPath, final boolean absolute) { | ||
| super("anchored", null, absolute); | ||
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| this.anchorPath = anchorPath; | ||
| this.evaluationPath = evaluationPath; | ||
| } | ||
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| @Override | ||
| public Stream<FieldValue> evaluate(final RecordPathEvaluationContext context) { | ||
| final Stream<FieldValue> anchoredStream = anchorPath.evaluate(context); | ||
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| return anchoredStream.flatMap(fv -> { | ||
| final Object value = fv.getValue(); | ||
| return evaluate(value); | ||
| }); | ||
| } | ||
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| private Stream<FieldValue> evaluate(final Object value) { | ||
| if (value == null) { | ||
| return Stream.of(); | ||
| } | ||
| if (value instanceof Record) { | ||
| final RecordPathEvaluationContext recordPathEvaluateContext = new StandardRecordPathEvaluationContext((Record) value); | ||
| return evaluationPath.evaluate(recordPathEvaluateContext); | ||
| } | ||
| if (value instanceof final Record[] array) { | ||
| return Arrays.stream(array).flatMap(element -> { | ||
| final RecordPathEvaluationContext recordPathEvaluateContext = new StandardRecordPathEvaluationContext(element); | ||
| return evaluationPath.evaluate(recordPathEvaluateContext); | ||
| }); | ||
| } | ||
| if (value instanceof final Iterable<?> iterable) { | ||
| return StreamSupport.stream(iterable.spliterator(), false).flatMap(element -> { | ||
| if (!(element instanceof Record)) { | ||
| return Stream.of(); | ||
| } | ||
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| final RecordPathEvaluationContext recordPathEvaluateContext = new StandardRecordPathEvaluationContext((Record) element); | ||
| return evaluationPath.evaluate(recordPathEvaluateContext); | ||
| }); | ||
| } | ||
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| return Stream.of(); | ||
| } | ||
| } |
84 changes: 84 additions & 0 deletions
84
nifi-commons/nifi-record-path/src/main/java/org/apache/nifi/record/path/functions/Join.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| /* | ||
| * 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.nifi.record.path.functions; | ||
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| import org.apache.nifi.record.path.FieldValue; | ||
| import org.apache.nifi.record.path.RecordPathEvaluationContext; | ||
| import org.apache.nifi.record.path.StandardFieldValue; | ||
| import org.apache.nifi.record.path.paths.RecordPathSegment; | ||
| import org.apache.nifi.record.path.util.RecordPathUtils; | ||
| import org.apache.nifi.serialization.record.RecordField; | ||
| import org.apache.nifi.serialization.record.RecordFieldType; | ||
| import org.apache.nifi.serialization.record.util.DataTypeUtils; | ||
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| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.stream.Stream; | ||
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| public class Join extends RecordPathSegment { | ||
| private final RecordPathSegment delimiterPath; | ||
| private final RecordPathSegment[] valuePaths; | ||
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| public Join(final RecordPathSegment delimiterPath, final RecordPathSegment[] valuePaths, final boolean absolute) { | ||
| super("join", null, absolute); | ||
| this.delimiterPath = delimiterPath; | ||
| this.valuePaths = valuePaths; | ||
| } | ||
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| @Override | ||
| public Stream<FieldValue> evaluate(final RecordPathEvaluationContext context) { | ||
| String delimiter = RecordPathUtils.getFirstStringValue(delimiterPath, context); | ||
| if (delimiter == null) { | ||
| delimiter = ""; | ||
| } | ||
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| final List<String> values = new ArrayList<>(); | ||
| for (final RecordPathSegment valuePath : valuePaths) { | ||
| final Stream<FieldValue> stream = valuePath.evaluate(context); | ||
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| stream.forEach(fv -> { | ||
| final Object value = fv.getValue(); | ||
| addStringValue(value, values); | ||
| }); | ||
| } | ||
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| final String joined = String.join(delimiter, values); | ||
| final RecordField field = new RecordField("join", RecordFieldType.STRING.getDataType()); | ||
| final FieldValue responseValue = new StandardFieldValue(joined, field, null); | ||
| return Stream.of(responseValue); | ||
| } | ||
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| private void addStringValue(final Object value, final List<String> values) { | ||
| if (value == null) { | ||
| values.add("null"); | ||
| return; | ||
| } | ||
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| if (value instanceof final Object[] array) { | ||
| for (final Object element : array) { | ||
| addStringValue(element, values); | ||
| } | ||
| } else if (value instanceof final Iterable<?> iterable) { | ||
| for (final Object element : iterable) { | ||
| addStringValue(element, values); | ||
| } | ||
| } else { | ||
| values.add(DataTypeUtils.toString(value, null)); | ||
| } | ||
| } | ||
| } |
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