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https://issues.apache.org/jira/browse/APEXMALHAR-2011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15196879#comment-15196879
]
ASF GitHub Bot commented on APEXMALHAR-2011:
--------------------------------------------
Github user tushargosavi commented on a diff in the pull request:
https://github.com/apache/incubator-apex-malhar/pull/211#discussion_r56287510
--- Diff:
contrib/src/main/java/com/datatorrent/contrib/avro/AvroToPojo.java ---
@@ -0,0 +1,428 @@
+/**
+ * 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.avro;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.StringTokenizer;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.apache.avro.AvroRuntimeException;
+import org.apache.avro.Schema;
+import org.apache.avro.Schema.Field;
+import org.apache.avro.generic.GenericRecord;
+import org.apache.commons.lang3.ClassUtils;
+import org.apache.hadoop.classification.InterfaceStability;
+
+import com.google.common.collect.Lists;
+
+import com.datatorrent.api.AutoMetric;
+import com.datatorrent.api.Context;
+import com.datatorrent.api.Context.OperatorContext;
+import com.datatorrent.api.Context.PortContext;
+import com.datatorrent.api.DefaultInputPort;
+import com.datatorrent.api.DefaultOutputPort;
+import com.datatorrent.api.Operator;
+import com.datatorrent.api.annotation.InputPortFieldAnnotation;
+import com.datatorrent.api.annotation.OutputPortFieldAnnotation;
+import com.datatorrent.lib.util.FieldInfo;
+import com.datatorrent.lib.util.FieldInfo.SupportType;
+import com.datatorrent.lib.util.PojoUtils;
+
+/**
+ * <p>
+ * AvroToPojo
+ * </p>
+ * A generic implementation for conversion from Avro to POJO. The POJO
class
+ * name & field mapping should be provided by the user. If this mapping is
not
+ * provided then reflection is used to determine this mapping. As of now
only
+ * primitive types are supported.
+ *
+ * @displayName Avro To Pojo
+ * @category Converter
+ * @tags avro
+ * @since 3.3.0
+ */
+
[email protected]
+public class AvroToPojo implements Operator
+{
+
+ private List<Field> columnNames;
+
+ private Class<?> cls;
+
+ private static final String FIELD_SEPARATOR = ":";
+ private static final String RECORD_SEPARATOR = ",";
+
+ private String genericRecordToPOJOFieldsMapping = null;
+
+ public String getGenericRecordToPOJOFieldsMapping()
+ {
+ return genericRecordToPOJOFieldsMapping;
+ }
+
+ public void setGenericRecordToPOJOFieldsMapping(String
genericRecordToPOJOFieldsMapping)
+ {
+ this.genericRecordToPOJOFieldsMapping =
genericRecordToPOJOFieldsMapping;
+ }
+
+ private String schemaFile;
+
+ private Schema schema;
--- End diff --
Is the schema serializable by Kryo, It does not have default constructor.
What is the different between schemaFile and schema? Can schema be created from
schemaFile? If yes you can make schema as transient and initialize it in the
setup.
> POJO to Avro record converter
> -----------------------------
>
> Key: APEXMALHAR-2011
> URL: https://issues.apache.org/jira/browse/APEXMALHAR-2011
> Project: Apache Apex Malhar
> Issue Type: New Feature
> Reporter: devendra tagare
>
> We are looking to develop a record converter which would take a POJO as an
> input and emit a Generic record as the output based on the given Avro schema.
> The expected inputs for this operator would be,
> 1.Class Name of the incoming POJO
> 2.Avro schema for the Generic Record to emit.
> This operator would receive an Object on its input port and emit a Generic
> record on the output port.
> To start with, we would handle primitive types and then go on to handle
> complex types.
> Thanks,
> Dev
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