Github user shubham-pathak22 commented on a diff in the pull request:
https://github.com/apache/incubator-apex-malhar/pull/288#discussion_r64560543
--- Diff:
contrib/src/main/java/com/datatorrent/contrib/parser/StreamingJsonParser.java
---
@@ -0,0 +1,451 @@
+/**
+ * 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 com.datatorrent.contrib.parser;
+
+import java.io.UnsupportedEncodingException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.ListIterator;
+import java.util.StringTokenizer;
+
+import org.elasticsearch.common.primitives.Ints;
+import org.json.simple.parser.JSONParser;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.apache.commons.lang3.ClassUtils;
+import org.apache.hadoop.classification.InterfaceStability;
+
+import com.google.common.collect.Lists;
+
+import com.datatorrent.api.Context;
+import com.datatorrent.api.Context.OperatorContext;
+import com.datatorrent.api.Context.PortContext;
+import com.datatorrent.api.DefaultOutputPort;
+import com.datatorrent.api.annotation.OutputPortFieldAnnotation;
+import com.datatorrent.lib.parser.Parser;
+import com.datatorrent.lib.util.FieldInfo;
+import com.datatorrent.lib.util.FieldInfo.SupportType;
+import com.datatorrent.lib.util.KeyValPair;
+import com.datatorrent.lib.util.PojoUtils;
+
+/**
+ * Operator that parses a JSON string tuple and emits a POJO on the output
port
+ * and tuples that could not be parsed on error port.Upstream operator
needs to
+ * ensure that a full JSON record is emitted.<br>
+ * <b>Properties</b><br>
+ * <b>pojoClass</b>:POJO class <br>
+ * <b>(optional)fieldMappingString</b>String of format
+ * fieldNameInJson:fieldNameInPOJO:DataType<br>
+ * <b>Ports</b> <br>
+ * <b>in</b>:input tuple as a String. Each tuple represents a json
string<br>
+ * <b>out</b>:tuples that are validated as per the user defined POJO are
emitted
+ * as POJO on this port<br>
+ * <b>err</b>:tuples that could not be parsed are emitted on this port as
+ * KeyValPair<String,String><br>
+ * Key being the tuple and Val being the reason
+ *
+ * @displayName SimpleStreamingJsonParser
+ * @category Parsers
+ * @tags json pojo parser streaming
+ */
+@InterfaceStability.Evolving
+public class StreamingJsonParser extends Parser<byte[], KeyValPair<String,
String>>
+{
+ private String jsonSchema;
+ private transient JSONParser jsonParser;
+ private String fieldMappingString;
+ private List<FieldInfo> fieldInfos;
+ private List<ActiveFieldInfo> columnFieldSetters;
+ protected JsonKeyFinder finder;
+ private static final String FIELD_SEPARATOR = ":";
+ private static final String RECORD_SEPARATOR = ",";
+ private ArrayList<String> columnFields;
+ private transient Class<?> pojoClass;
+
+ /**
+ * @return POJO class
+ */
+ private Class<?> getPojoClass()
+ {
+ return pojoClass;
+ }
+
+ /**
+ * Sets the POJO class
+ */
+ public void setPojoClass(Class<?> pojoClass)
--- End diff --
setters and getters for pojoClass is not required. Class should be set
setup method of the port
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