Github user bartoszjkwozniak commented on a diff in the pull request:
    --- Diff: 
    @@ -0,0 +1,159 @@
    + * 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
    + *
    + *
    + *
    + * 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.standard;
    +import java.nio.charset.StandardCharsets;
    +import java.util.ArrayList;
    +import java.util.Collections;
    +import java.util.HashSet;
    +import java.util.List;
    +import java.util.Set;
    +import java.util.concurrent.atomic.AtomicBoolean;
    +import java.util.concurrent.atomic.AtomicReference;
    +import org.apache.nifi.annotation.behavior.EventDriven;
    +import org.apache.nifi.annotation.behavior.InputRequirement;
    +import org.apache.nifi.annotation.behavior.InputRequirement.Requirement;
    +import org.apache.nifi.annotation.behavior.SideEffectFree;
    +import org.apache.nifi.annotation.behavior.SupportsBatching;
    +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.components.PropertyDescriptor;
    +import org.apache.nifi.flowfile.FlowFile;
    +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.util.StandardValidators;
    +import org.everit.json.schema.Schema;
    +import org.everit.json.schema.ValidationException;
    +import org.everit.json.schema.loader.SchemaLoader;
    +import org.json.JSONArray;
    +import org.json.JSONObject;
    +import org.json.JSONTokener;
    +@Tags({"json", "schema", "validation"})
    +@CapabilityDescription("Validates the contents of FlowFiles against a 
user-specified JSON Schema file")
    +public class ValidateJson extends AbstractProcessor {
    +    public static final PropertyDescriptor SCHEMA_FILE = new 
    +            .name("Schema File")
    +            .description("The path to the Schema file that is to be used 
for validation")
    +            .required(true)
    +            .addValidator(StandardValidators.FILE_EXISTS_VALIDATOR)
    +            .build();
    +    public static final Relationship REL_VALID = new Relationship.Builder()
    +            .name("valid")
    +            .description("FlowFiles that are successfully validated 
against the schema are routed to this relationship")
    +            .build();
    +    public static final Relationship REL_INVALID = new 
    +            .name("invalid")
    +            .description("FlowFiles that are not valid according to the 
specified schema are routed to this relationship")
    +            .build();
    +    private List<PropertyDescriptor> properties;
    +    private Set<Relationship> relationships;
    +    private final AtomicReference<Schema> schemaRef = new 
    +    @Override
    +    protected void init(final ProcessorInitializationContext context) {
    +        final List<PropertyDescriptor> properties = new ArrayList<>();
    +        properties.add(SCHEMA_FILE);
    --- End diff --
    Thank you for your detailed suggestion, it helped a lot!

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