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NIFI-8111: Add JSLTTransformJSON Processor 

This closes #4797

Signed-off-by: David Handermann <exceptionfactory@apache.org>
This commit is contained in:
Matthew Burgess 2022-09-08 18:28:12 -05:00 committed by exceptionfactory
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nifi-assembly/pom.xml
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@ -928,6 +928,12 @@ language governing permissions and limitations under the License. -->
<version>1.19.0-SNAPSHOT</version>
<type>nar</type>
</dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-jslt-nar</artifactId>
<version>1.19.0-SNAPSHOT</version>
<type>nar</type>
</dependency>
<!-- dependencies for jaxb/activation/annotation for running NiFi on Java 11 -->
<!-- TODO: remove these once minimum Java version is 11 -->
<dependency>

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<?xml version="1.0" encoding="UTF-8"?>
<!--
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.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-jslt-bundle</artifactId>
<version>1.19.0-SNAPSHOT</version>
</parent>
<artifactId>nifi-jslt-nar</artifactId>
<packaging>nar</packaging>
<dependencies>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-jslt-processors</artifactId>
<version>1.19.0-SNAPSHOT</version>
</dependency>
</dependencies>
</project>

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nifi-jslt-record-nar
Copyright 2014-2020 The Apache Software Foundation
This product includes software developed at
The Apache Software Foundation (http://www.apache.org/).
******************
Apache Software License v2
******************
The following binary components are provided under the Apache Software License v2
(ASLv2) JSLT
(ASLv2) Jackson JSON processor
The following NOTICE information applies:
# Jackson JSON processor
Jackson is a high-performance, Free/Open Source JSON processing library.
It was originally written by Tatu Saloranta (tatu.saloranta@iki.fi), and has
been in development since 2007.
It is currently developed by a community of developers, as well as supported
commercially by FasterXML.com.
## Licensing
Jackson core and extension components may licensed under different licenses.
To find the details that apply to this artifact see the accompanying LICENSE file.
For more information, including possible other licensing options, contact
FasterXML.com (http://fasterxml.com).
## Credits
A list of contributors may be found from CREDITS file, which is included
in some artifacts (usually source distributions); but is always available
from the source code management (SCM) system project uses.

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<?xml version="1.0" encoding="UTF-8"?>
<!--
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.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-jslt-bundle</artifactId>
<version>1.19.0-SNAPSHOT</version>
</parent>
<artifactId>nifi-jslt-processors</artifactId>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-api</artifactId>
</dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-utils</artifactId>
<version>1.19.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.schibsted.spt.data</groupId>
<artifactId>jslt</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>com.github.ben-manes.caffeine</groupId>
<artifactId>caffeine</artifactId>
<version>2.9.3</version>
</dependency>
<dependency>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-mock</artifactId>
<version>1.19.0-SNAPSHOT</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.rat</groupId>
<artifactId>apache-rat-plugin</artifactId>
<configuration>
<excludes combine.children="append">
<exclude>src/test/resources/*.json</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>

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/*
* 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.
*/
package org.apache.nifi.processors.jslt;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectWriter;
import com.github.benmanes.caffeine.cache.Cache;
import com.github.benmanes.caffeine.cache.Caffeine;
import com.schibsted.spt.data.jslt.Expression;
import com.schibsted.spt.data.jslt.JsltException;
import com.schibsted.spt.data.jslt.Parser;
import org.apache.nifi.annotation.behavior.InputRequirement;
import org.apache.nifi.annotation.behavior.SideEffectFree;
import org.apache.nifi.annotation.behavior.SupportsBatching;
import org.apache.nifi.annotation.behavior.SystemResource;
import org.apache.nifi.annotation.behavior.SystemResourceConsideration;
import org.apache.nifi.annotation.behavior.WritesAttribute;
import org.apache.nifi.annotation.documentation.CapabilityDescription;
import org.apache.nifi.annotation.documentation.Tags;
import org.apache.nifi.annotation.lifecycle.OnScheduled;
import org.apache.nifi.annotation.lifecycle.OnShutdown;
import org.apache.nifi.annotation.lifecycle.OnStopped;
import org.apache.nifi.components.PropertyDescriptor;
import org.apache.nifi.components.ValidationContext;
import org.apache.nifi.components.ValidationResult;
import org.apache.nifi.expression.ExpressionLanguageScope;
import org.apache.nifi.flowfile.FlowFile;
import org.apache.nifi.flowfile.attributes.CoreAttributes;
import org.apache.nifi.logging.ComponentLog;
import org.apache.nifi.processor.AbstractProcessor;
import org.apache.nifi.processor.ProcessContext;
import org.apache.nifi.processor.ProcessSession;
import org.apache.nifi.processor.ProcessorInitializationContext;
import org.apache.nifi.processor.Relationship;
import org.apache.nifi.processor.exception.ProcessException;
import org.apache.nifi.processor.util.StandardValidators;
import org.apache.nifi.util.StopWatch;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
@SideEffectFree
@SupportsBatching
@Tags({"json", "jslt", "transform"})
@InputRequirement(InputRequirement.Requirement.INPUT_REQUIRED)
@SystemResourceConsideration(resource = SystemResource.MEMORY)
@WritesAttribute(attribute = "mime.type", description = "Always set to application/json")
@CapabilityDescription("Applies a JSLT transformation to the FlowFile JSON payload. A new FlowFile is created "
+ "with transformed content and is routed to the 'success' relationship. If the JSLT transform "
+ "fails, the original FlowFile is routed to the 'failure' relationship.")
public class JSLTTransformJSON extends AbstractProcessor {
public static final PropertyDescriptor JSLT_TRANSFORM = new PropertyDescriptor.Builder()
.name("jslt-transform-transformation")
.displayName("JSLT Transformation")
.description("JSLT Transformation for transform of JSON data. Any NiFi Expression Language present will be evaluated first to get the final transform to be applied.")
.expressionLanguageSupported(ExpressionLanguageScope.FLOWFILE_ATTRIBUTES)
.addValidator(StandardValidators.NON_EMPTY_VALIDATOR)
.required(true)
.build();
public static final PropertyDescriptor PRETTY_PRINT = new PropertyDescriptor.Builder()
.name("jslt-transform-pretty_print")
.displayName("Pretty Print")
.description("Apply pretty-print formatting to the output of the JSLT transform")
.required(true)
.allowableValues("true", "false")
.defaultValue("false")
.build();
public static final PropertyDescriptor TRANSFORM_CACHE_SIZE = new PropertyDescriptor.Builder()
.name("jslt-transform-cache-size")
.displayName("Transform Cache Size")
.description("Compiling a JSLT Transform can be fairly expensive. Ideally, this will be done only once. However, if the Expression Language is used in the transform, we may need "
+ "a new Transform for each FlowFile. This value controls how many of those Transforms we cache in memory in order to avoid having to compile the Transform each time.")
.expressionLanguageSupported(ExpressionLanguageScope.NONE)
.addValidator(StandardValidators.POSITIVE_INTEGER_VALIDATOR)
.defaultValue("1")
.required(true)
.build();
public static final Relationship REL_SUCCESS = new Relationship.Builder()
.name("success")
.description("The FlowFile with transformed content will be routed to this relationship")
.build();
public static final Relationship REL_FAILURE = new Relationship.Builder()
.name("failure")
.description("If a FlowFile fails processing for any reason (for example, the FlowFile is not valid JSON), it will be routed to this relationship")
.build();
private List<PropertyDescriptor> descriptors;
private Set<Relationship> relationships;
private static final ObjectMapper jsonObjectMapper = new ObjectMapper();
/**
* A cache for transform objects. It keeps values indexed by JSLT specification string.
*/
private Cache<String, Expression> transformCache;
@Override
protected void init(final ProcessorInitializationContext context) {
final List<PropertyDescriptor> descriptors = new ArrayList<>();
descriptors.add(JSLT_TRANSFORM);
descriptors.add(PRETTY_PRINT);
descriptors.add(TRANSFORM_CACHE_SIZE);
this.descriptors = Collections.unmodifiableList(descriptors);
final Set<Relationship> relationships = new HashSet<>();
relationships.add(REL_SUCCESS);
relationships.add(REL_FAILURE);
this.relationships = Collections.unmodifiableSet(relationships);
}
@Override
public Set<Relationship> getRelationships() {
return this.relationships;
}
@Override
public final List<PropertyDescriptor> getSupportedPropertyDescriptors() {
return descriptors;
}
@Override
protected Collection<ValidationResult> customValidate(ValidationContext validationContext) {
final List<ValidationResult> results = new ArrayList<>(super.customValidate(validationContext));
// If no EL present, pre-compile the script (and report any errors as to mark the processor invalid)
if (!validationContext.getProperty(JSLT_TRANSFORM).isExpressionLanguagePresent()) {
final String transform = validationContext.getProperty(JSLT_TRANSFORM).getValue();
try {
Parser.compileString(transform);
} catch (JsltException je) {
results.add(new ValidationResult.Builder().subject(JSLT_TRANSFORM.getDisplayName()).valid(false).explanation("error in transform: " + je.getMessage()).build());
}
} else {
// Expression Language is present, we won't know if the transform is valid until the EL is evaluated
results.add(new ValidationResult.Builder().subject(JSLT_TRANSFORM.getDisplayName()).valid(true).build());
}
return results;
}
@OnScheduled
public void onScheduled(final ProcessContext context) {
int maxTransformsToCache = context.getProperty(TRANSFORM_CACHE_SIZE).asInteger();
transformCache = Caffeine.newBuilder()
.maximumSize(maxTransformsToCache)
.build();
// Precompile the transform if it hasn't been done already (and if there is no Expression Language present)
if (!context.getProperty(JSLT_TRANSFORM).isExpressionLanguagePresent()) {
final String transform = context.getProperty(JSLT_TRANSFORM).getValue();
try {
transformCache.put(transform, Parser.compileString(transform));
} catch (JsltException je) {
throw new ProcessException("Error compiling JSLT transform: " + je.getMessage(), je);
}
}
}
@Override
public void onTrigger(final ProcessContext context, final ProcessSession session) throws ProcessException {
final FlowFile original = session.get();
if (original == null) {
return;
}
final ComponentLog logger = getLogger();
final StopWatch stopWatch = new StopWatch(true);
JsonNode firstJsonNode;
try (final InputStream in = session.read(original)) {
firstJsonNode = readJson(in);
} catch (final Exception e) {
logger.error("Failed to transform {}; routing to failure", original, e);
session.transfer(original, REL_FAILURE);
return;
}
try {
final String transform = context.getProperty(JSLT_TRANSFORM).evaluateAttributeExpressions(original).getValue();
Expression jsltExpression = transformCache.get(transform, currString -> Parser.compileString(transform));
final JsonNode transformedJson = jsltExpression.apply(firstJsonNode);
final ObjectWriter writer = context.getProperty(PRETTY_PRINT).asBoolean() ? jsonObjectMapper.writerWithDefaultPrettyPrinter() : jsonObjectMapper.writer();
final Object outputObject;
if (transformedJson == null || transformedJson.isNull()) {
logger.warn("JSLT transform resulted in no data");
outputObject = null;
} else {
outputObject = transformedJson;
}
FlowFile transformed = session.write(original, out -> {
if (outputObject != null) {
writer.writeValue(out, outputObject);
}
});
transformed = session.putAttribute(transformed, CoreAttributes.MIME_TYPE.key(), "application/json");
session.transfer(transformed, REL_SUCCESS);
session.getProvenanceReporter().modifyContent(transformed, "Modified With " + transform, stopWatch.getElapsed(TimeUnit.MILLISECONDS));
logger.debug("Transformed {}", original);
} catch (final Exception ex) {
logger.error("JSLT Transform failed {}", original, ex);
session.transfer(original, REL_FAILURE);
}
}
@OnStopped
@OnShutdown
public void onStopped(ProcessContext context) {
transformCache.cleanUp();
}
private JsonNode readJson(final InputStream in) throws IOException {
try {
return jsonObjectMapper.readTree(in);
} catch (final JsonParseException e) {
throw new IOException("Could not parse data as JSON", e);
}
}
}

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# 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.
org.apache.nifi.processors.jslt.JSLTTransformJSON

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/*
* 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.
*/
package org.apache.nifi.processors.jslt;
import org.apache.nifi.util.MockFlowFile;
import org.apache.nifi.util.TestRunner;
import org.apache.nifi.util.TestRunners;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;
public class TestJSLTTransformJSON {
private final static Path JSON_INPUT = Paths.get("src/test/resources/input.json");
private TestRunner runner = TestRunners.newTestRunner(new JSLTTransformJSON());
@BeforeEach
public void setup() {
runner = TestRunners.newTestRunner(new JSLTTransformJSON());
}
@Test
public void testBadInput() throws IOException {
final String inputFlowFile = "I am not JSON";
final String transform = new String(Files.readAllBytes(Paths.get("src/test/resources/simpleTransform.json")));
runner.setProperty(JSLTTransformJSON.JSLT_TRANSFORM, transform);
runner.setProperty(JSLTTransformJSON.PRETTY_PRINT, "true");
runner.enqueue(inputFlowFile);
runner.run();
runner.assertTransferCount(JSLTTransformJSON.REL_SUCCESS, 0);
runner.assertTransferCount(JSLTTransformJSON.REL_FAILURE, 1);
}
@Test
public void testInvalidJSLTTransform() {
final TestRunner runner = TestRunners.newTestRunner(new JSLTTransformJSON());
final String invalidTransform = "invalid";
runner.setProperty(JSLTTransformJSON.JSLT_TRANSFORM, invalidTransform);
runner.assertNotValid();
}
@Test
public void testSimpleJSLT() throws IOException {
final String inputFlowFile = new String(Files.readAllBytes(JSON_INPUT));
final String transform = new String(Files.readAllBytes(Paths.get("src/test/resources/simpleTransform.json")));
runner.setProperty(JSLTTransformJSON.JSLT_TRANSFORM, transform);
runner.setProperty(JSLTTransformJSON.PRETTY_PRINT, "true");
runner.enqueue(inputFlowFile);
runner.run();
runner.assertTransferCount(JSLTTransformJSON.REL_SUCCESS, 1);
runner.assertTransferCount(JSLTTransformJSON.REL_FAILURE, 0);
MockFlowFile flowFile = runner.getFlowFilesForRelationship(JSLTTransformJSON.REL_SUCCESS).get(0);
final String expectedOutput = new String(Files.readAllBytes(Paths.get("src/test/resources/simpleOutput.json")));
flowFile.assertContentEquals(translateNewLines(expectedOutput));
}
@Test
public void testTransform() throws IOException {
final String inputFlowFile = new String(Files.readAllBytes(JSON_INPUT));
final String transform = new String(Files.readAllBytes(Paths.get("src/test/resources/dynamicKeyTransform.json")));
runner.setProperty(JSLTTransformJSON.JSLT_TRANSFORM, transform);
runner.setProperty(JSLTTransformJSON.PRETTY_PRINT, "true");
runner.enqueue(inputFlowFile);
runner.run();
runner.assertTransferCount(JSLTTransformJSON.REL_SUCCESS, 1);
runner.assertTransferCount(JSLTTransformJSON.REL_FAILURE, 0);
MockFlowFile flowFile = runner.getFlowFilesForRelationship(JSLTTransformJSON.REL_SUCCESS).get(0);
final String expectedOutput = new String(Files.readAllBytes(Paths.get("src/test/resources/dynamicKeyTransformOutput.json")));
flowFile.assertContentEquals(translateNewLines(expectedOutput));
}
// This test verifies the capability of JSLT to perform a "cardinality ONE" operation (i.e. get first element if array) like JOLT has
@Test
public void testCardinality() throws IOException {
final String inputFlowFile = new String(Files.readAllBytes(JSON_INPUT));
final String transform = new String(Files.readAllBytes(Paths.get("src/test/resources/cardinalityTransform.json")));
runner.setProperty(JSLTTransformJSON.JSLT_TRANSFORM, transform);
runner.setProperty(JSLTTransformJSON.PRETTY_PRINT, "true");
runner.enqueue(inputFlowFile);
runner.run();
runner.assertTransferCount(JSLTTransformJSON.REL_SUCCESS, 1);
runner.assertTransferCount(JSLTTransformJSON.REL_FAILURE, 0);
MockFlowFile flowFile = runner.getFlowFilesForRelationship(JSLTTransformJSON.REL_SUCCESS).get(0);
final String expectedOutput = new String(Files.readAllBytes(Paths.get("src/test/resources/cardinalityOutput.json")));
flowFile.assertContentEquals(translateNewLines(expectedOutput));
}
@Test
public void testExpressionLanguageTransform() throws IOException {
final String inputFlowFile = new String(Files.readAllBytes(JSON_INPUT));
final String transform = new String(Files.readAllBytes(Paths.get("src/test/resources/expressionLanguageTransform.json")));
runner.setProperty(JSLTTransformJSON.JSLT_TRANSFORM, transform);
runner.assertValid();
runner.setProperty(JSLTTransformJSON.PRETTY_PRINT, "true");
Map<String, String> attrs = new HashMap<>();
attrs.put("rating.range", "RatingRange");
attrs.put("rating.quality", ".rating.quality.value");
runner.enqueue(inputFlowFile, attrs);
runner.run();
runner.assertTransferCount(JSLTTransformJSON.REL_SUCCESS, 1);
runner.assertTransferCount(JSLTTransformJSON.REL_FAILURE, 0);
MockFlowFile flowFile = runner.getFlowFilesForRelationship(JSLTTransformJSON.REL_SUCCESS).get(0);
final String expectedOutput = new String(Files.readAllBytes(Paths.get("src/test/resources/simpleOutput.json")));
flowFile.assertContentEquals(translateNewLines(expectedOutput));
}
@Test
public void testArrayJSLT() throws IOException {
final String inputFlowFile = new String(Files.readAllBytes(Paths.get("src/test/resources/inputArray.json")));
final String transform = new String(Files.readAllBytes(Paths.get("src/test/resources/arrayTransform.json")));
runner.setProperty(JSLTTransformJSON.JSLT_TRANSFORM, transform);
runner.setProperty(JSLTTransformJSON.PRETTY_PRINT, "true");
runner.enqueue(inputFlowFile);
runner.run();
runner.assertTransferCount(JSLTTransformJSON.REL_SUCCESS, 1);
runner.assertTransferCount(JSLTTransformJSON.REL_FAILURE, 0);
MockFlowFile flowFile = runner.getFlowFilesForRelationship(JSLTTransformJSON.REL_SUCCESS).get(0);
final String expectedOutput = new String(Files.readAllBytes(Paths.get("src/test/resources/arrayOutput.json")));
flowFile.assertContentEquals(translateNewLines(expectedOutput));
}
@Test
public void testJSLTNoOutput() throws IOException {
final String input = "{\"a\":1}";
final String transform = ".b";
runner.setProperty(JSLTTransformJSON.JSLT_TRANSFORM, transform);
runner.setProperty(JSLTTransformJSON.PRETTY_PRINT, "true");
runner.enqueue(input);
runner.run();
runner.assertTransferCount(JSLTTransformJSON.REL_SUCCESS, 1);
runner.assertTransferCount(JSLTTransformJSON.REL_FAILURE, 0);
MockFlowFile flowFile = runner.getFlowFilesForRelationship(JSLTTransformJSON.REL_SUCCESS).get(0);
flowFile.assertContentEquals(new byte[0]);
}
/*
* Translate newlines (expected to be in *nix format to be in the codebase) to the system's line separator (to support Windows, e.g.)
*/
private String translateNewLines(final String text) {
final String lineSeparator = System.getProperty("line.separator");
final Pattern pattern = Pattern.compile("\n", Pattern.MULTILINE);
final String translated = pattern.matcher(text).replaceAll(lineSeparator);
return translated;
}
}

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nifi-nar-bundles/nifi-jslt-bundle/nifi-jslt-processors/src/test/resources/arrayOutput.json Normal file
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@ -0,0 +1,15 @@
[ {
"SecondaryRatings" : {
"quality" : {
"Value" : 3,
"RatingRange" : 3
}
}
}, {
"SecondaryRatings" : {
"quality" : {
"Value" : 13,
"RatingRange" : 13
}
}
} ]

9
nifi-nar-bundles/nifi-jslt-bundle/nifi-jslt-processors/src/test/resources/arrayTransform.json Normal file
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@ -0,0 +1,9 @@
[for (.)
{
"SecondaryRatings" : {
"quality" : {
"Value" : .rating.primary.value,
"RatingRange" : .rating.quality.value
}
}
}]

13
nifi-nar-bundles/nifi-jslt-bundle/nifi-jslt-processors/src/test/resources/cardinalityOutput.json Normal file
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@ -0,0 +1,13 @@
{
"rating" : {
"primary" : {
"value" : 3
},
"series" : {
"value" : 5
},
"quality" : {
"value" : 3
}
}
}

15
nifi-nar-bundles/nifi-jslt-bundle/nifi-jslt-processors/src/test/resources/cardinalityTransform.json Normal file
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@ -0,0 +1,15 @@
def first(node)
if (is-array($node))
$node[0]
else
$node
{
"rating": {
for(.rating)
.key : {
"value": first(."value".value)
}
}
}

12
nifi-nar-bundles/nifi-jslt-bundle/nifi-jslt-processors/src/test/resources/dynamicKeyTransform.json Normal file
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@ -0,0 +1,12 @@
{
"Range": 5,
"Rating": .rating.primary.value,
"SecondaryRatings": {
for(.rating)
.key: {
"Id": .key,
"Range": 5,
"Value": .value."value"
}
}
}

21
nifi-nar-bundles/nifi-jslt-bundle/nifi-jslt-processors/src/test/resources/dynamicKeyTransformOutput.json Normal file
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@ -0,0 +1,21 @@
{
"Range" : 5,
"Rating" : 3,
"SecondaryRatings" : {
"primary" : {
"Id" : "primary",
"Range" : 5,
"Value" : 3
},
"series" : {
"Id" : "series",
"Range" : 5,
"Value" : [ 5, 4 ]
},
"quality" : {
"Id" : "quality",
"Range" : 5,
"Value" : 3
}
}
}

8
nifi-nar-bundles/nifi-jslt-bundle/nifi-jslt-processors/src/test/resources/expressionLanguageTransform.json Normal file
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@ -0,0 +1,8 @@
{
"SecondaryRatings" : {
"quality" : {
"Value" : .rating.primary.value,
"${rating.range}" : ${rating.quality}
}
}
}

13
nifi-nar-bundles/nifi-jslt-bundle/nifi-jslt-processors/src/test/resources/input.json Normal file
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@ -0,0 +1,13 @@
{
"rating": {
"primary": {
"value": 3
},
"series": {
"value": [5,4]
},
"quality": {
"value": 3
}
}
}

26
nifi-nar-bundles/nifi-jslt-bundle/nifi-jslt-processors/src/test/resources/inputArray.json Normal file
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@ -0,0 +1,26 @@
[{
"rating": {
"primary": {
"value": 3
},
"series": {
"value": [5,4]
},
"quality": {
"value": 3
}
}
},
{
"rating": {
"primary": {
"value": 13
},
"series": {
"value": [15,14]
},
"quality": {
"value": 13
}
}
}]

8
nifi-nar-bundles/nifi-jslt-bundle/nifi-jslt-processors/src/test/resources/simpleOutput.json Normal file
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@ -0,0 +1,8 @@
{
"SecondaryRatings" : {
"quality" : {
"Value" : 3,
"RatingRange" : 3
}
}
}

8
nifi-nar-bundles/nifi-jslt-bundle/nifi-jslt-processors/src/test/resources/simpleTransform.json Normal file
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@ -0,0 +1,8 @@
{
"SecondaryRatings" : {
"quality" : {
"Value" : .rating.primary.value,
"RatingRange" : .rating.quality.value
}
}
}

45
nifi-nar-bundles/nifi-jslt-bundle/pom.xml Normal file
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@ -0,0 +1,45 @@
<?xml version="1.0" encoding="UTF-8"?>
<!--
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.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-nar-bundles</artifactId>
<version>1.19.0-SNAPSHOT</version>
</parent>
<groupId>org.apache.nifi</groupId>
<artifactId>nifi-jslt-bundle</artifactId>
<version>1.19.0-SNAPSHOT</version>
<packaging>pom</packaging>
<modules>
<module>nifi-jslt-processors</module>
<module>nifi-jslt-nar</module>
</modules>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.schibsted.spt.data</groupId>
<artifactId>jslt</artifactId>
<version>0.1.13</version>
</dependency>
</dependencies>
</dependencyManagement>
</project>

1
nifi-nar-bundles/pom.xml
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@ -120,6 +120,7 @@
<module>nifi-flow-registry-client-bundle</module>
<module>nifi-shopify-bundle</module>
<module>nifi-iceberg-bundle</module>
<module>nifi-jslt-bundle</module>
</modules>
<build>