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svn commit: r1821033 [17/46] - in /nifi/site/trunk/docs: nifi-docs/
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+++ nifi/site/trunk/docs/nifi-docs/components/org.apache.nifi/nifi-poi-nar/1.5.0/org.apache.nifi.processors.poi.ConvertExcelToCSVProcessor/index.html Fri Jan 12 21:00:14 2018
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+<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"></meta><title>ConvertExcelToCSVProcessor</title><link rel="stylesheet" href="../../../../../css/component-usage.css" type="text/css"></link></head><script type="text/javascript">window.onload = function(){if(self==top) { document.getElementById('nameHeader').style.display = "inherit"; } }</script><body><h1 id="nameHeader" style="display: none;">ConvertExcelToCSVProcessor</h1><h2>Description: </h2><p>Consumes a Microsoft Excel document and converts each worksheet to csv. Each sheet from the incoming Excel document will generate a new Flowfile that will be output from this processor. Each output Flowfile's contents will be formatted as a csv file where the each row from the excel sheet is output as a newline in the csv file. This processor is currently only capable of processing .xlsx (XSSF 2007 OOXML file format) Excel documents and not older .xls (HSSF '97(-2007) file format) documents. This processor also expects well forma
tted CSV content and will not escape cell's containing invalid content such as newlines or additional commas.</p><p><a href="additionalDetails.html">Additional Details...</a></p><h3>Tags: </h3><p>excel, csv, poi</p><h3>Properties: </h3><p>In the list below, the names of required properties appear in <strong>bold</strong>. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the <a href="../../../../../html/expression-language-guide.html">NiFi Expression Language</a>.</p><table id="properties"><tr><th>Name</th><th>Default Value</th><th>Allowable Values</th><th>Description</th></tr><tr><td id="name">Sheets to Extract</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">Comma separated list of Excel document sheet names that should be extracted from the excel document. If this property is left blank then all of the sheets will be extracted from the Excel document. The list
of names is case in-sensitive. Any sheets not specified in this value will be ignored.<br/><strong>Supports Expression Language: true</strong></td></tr><tr><td id="name"><strong>Number of Rows to Skip</strong></td><td id="default-value">0</td><td id="allowable-values"></td><td id="description">The row number of the first row to start processing.Use this to skip over rows of data at the top of your worksheet that are not part of the dataset.Empty rows of data anywhere in the spreadsheet will always be skipped, no matter what this value is set to.</td></tr><tr><td id="name">Columns To Skip</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">Comma delimited list of column numbers to skip. Use the columns number and not the letter designation. Use this to skip over columns anywhere in your worksheet that you don't want extracted as part of the record.</td></tr><tr><td id="name"><strong>Format Cell Values</strong></td><td id="default-value">false</td><td
id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">Should the cell values be written to CSV using the formatting applied in Excel, or should they be printed as raw values.</td></tr><tr><td id="name"><strong>CSV Format</strong></td><td id="default-value">custom</td><td id="allowable-values"><ul><li>Custom Format <img src="../../../../../html/images/iconInfo.png" alt="The format of the CSV is configured by using the properties of this Controller Service, such as Value Separator" title="The format of the CSV is configured by using the properties of this Controller Service, such as Value Separator"></img></li><li>RFC 4180 <img src="../../../../../html/images/iconInfo.png" alt="CSV data follows the RFC 4180 Specification defined at https://tools.ietf.org/html/rfc4180" title="CSV data follows the RFC 4180 Specification defined at https://tools.ietf.org/html/rfc4180"></img></li><li>Microsoft Excel <img src="../../../../../html/images/iconInfo.png" alt="CSV
data follows the format used by Microsoft Excel" title="CSV data follows the format used by Microsoft Excel"></img></li><li>Tab-Delimited <img src="../../../../../html/images/iconInfo.png" alt="CSV data is Tab-Delimited instead of Comma Delimited" title="CSV data is Tab-Delimited instead of Comma Delimited"></img></li><li>MySQL Format <img src="../../../../../html/images/iconInfo.png" alt="CSV data follows the format used by MySQL" title="CSV data follows the format used by MySQL"></img></li><li>Informix Unload <img src="../../../../../html/images/iconInfo.png" alt="The format used by Informix when issuing the UNLOAD TO file_name command" title="The format used by Informix when issuing the UNLOAD TO file_name command"></img></li><li>Informix Unload Escape Disabled <img src="../../../../../html/images/iconInfo.png" alt="The format used by Informix when issuing the UNLOAD TO file_name command with escaping disabled" title="The format used by Informix when issuing the UNLOAD TO file_na
me command with escaping disabled"></img></li></ul></td><td id="description">Specifies which "format" the CSV data is in, or specifies if custom formatting should be used.</td></tr><tr><td id="name"><strong>Value Separator</strong></td><td id="default-value">,</td><td id="allowable-values"></td><td id="description">The character that is used to separate values/fields in a CSV Record</td></tr><tr><td id="name"><strong>Include Header Line</strong></td><td id="default-value">true</td><td id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">Specifies whether or not the CSV column names should be written out as the first line.</td></tr><tr><td id="name"><strong>Quote Character</strong></td><td id="default-value">"</td><td id="allowable-values"></td><td id="description">The character that is used to quote values so that escape characters do not have to be used</td></tr><tr><td id="name"><strong>Escape Character</strong></td><td id="default-value">\</td><td i
d="allowable-values"></td><td id="description">The character that is used to escape characters that would otherwise have a specific meaning to the CSV Parser.</td></tr><tr><td id="name">Comment Marker</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">The character that is used to denote the start of a comment. Any line that begins with this comment will be ignored.</td></tr><tr><td id="name">Null String</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">Specifies a String that, if present as a value in the CSV, should be considered a null field instead of using the literal value.</td></tr><tr><td id="name"><strong>Trim Fields</strong></td><td id="default-value">true</td><td id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">Whether or not white space should be removed from the beginning and end of fields</td></tr><tr><td id="name"><strong>Quote Mode</strong></td><td id="default-value"
>NONE</td><td id="allowable-values"><ul><li>Quote All Values <img src="../../../../../html/images/iconInfo.png" alt="All values will be quoted using the configured quote character." title="All values will be quoted using the configured quote character."></img></li><li>Quote Minimal <img src="../../../../../html/images/iconInfo.png" alt="Values will be quoted only if they are contain special characters such as newline characters or field separators." title="Values will be quoted only if they are contain special characters such as newline characters or field separators."></img></li><li>Quote Non-Numeric Values <img src="../../../../../html/images/iconInfo.png" alt="Values will be quoted unless the value is a number." title="Values will be quoted unless the value is a number."></img></li><li>Do Not Quote Values <img src="../../../../../html/images/iconInfo.png" alt="Values will not be quoted. Instead, all special characters will be escaped using the configured escape character." title=
"Values will not be quoted. Instead, all special characters will be escaped using the configured escape character."></img></li></ul></td><td id="description">Specifies how fields should be quoted when they are written</td></tr><tr><td id="name"><strong>Record Separator</strong></td><td id="default-value">\n</td><td id="allowable-values"></td><td id="description">Specifies the characters to use in order to separate CSV Records</td></tr><tr><td id="name"><strong>Include Trailing Delimiter</strong></td><td id="default-value">false</td><td id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">If true, a trailing delimiter will be added to each CSV Record that is written. If false, the trailing delimiter will be omitted.</td></tr></table><h3>Relationships: </h3><table id="relationships"><tr><th>Name</th><th>Description</th></tr><tr><td>success</td><td>Excel data converted to csv</td></tr><tr><td>failure</td><td>Failed to parse the Excel document</td></tr><tr
><td>original</td><td>Original Excel document received by this processor</td></tr></table><h3>Reads Attributes: </h3>None specified.<h3>Writes Attributes: </h3><table id="writes-attributes"><tr><th>Name</th><th>Description</th></tr><tr><td>sheetname</td><td>The name of the Excel sheet that this particular row of data came from in the Excel document</td></tr><tr><td>numrows</td><td>The number of rows in this Excel Sheet</td></tr><tr><td>sourcefilename</td><td>The name of the Excel document file that this data originated from</td></tr><tr><td>convertexceltocsvprocessor.error</td><td>Error message that was encountered on a per Excel sheet basis. This attribute is only populated if an error was occured while processing the particular sheet. Having the error present at the sheet level will allow for the end user to better understand what syntax errors in their excel doc on a larger scale caused the error.</td></tr></table><h3>State management: </h3>This component does not store state.<h3
>Restricted: </h3>This component is not restricted.</body></html>
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+<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"></meta><title>AvroReader</title><link rel="stylesheet" href="../../../../../css/component-usage.css" type="text/css"></link></head><script type="text/javascript">window.onload = function(){if(self==top) { document.getElementById('nameHeader').style.display = "inherit"; } }</script><body><h1 id="nameHeader" style="display: none;">AvroReader</h1><h2>Description: </h2><p>Parses Avro data and returns each Avro record as an separate Record object. The Avro data may contain the schema itself, or the schema can be externalized and accessed by one of the methods offered by the 'Schema Access Strategy' property.</p><h3>Tags: </h3><p>avro, parse, record, row, reader, delimited, comma, separated, values</p><h3>Properties: </h3><p>In the list below, the names of required properties appear in <strong>bold</strong>. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a prope
rty supports the <a href="../../../../../html/expression-language-guide.html">NiFi Expression Language</a>.</p><table id="properties"><tr><th>Name</th><th>Default Value</th><th>Allowable Values</th><th>Description</th></tr><tr><td id="name"><strong>Schema Access Strategy</strong></td><td id="default-value">embedded-avro-schema</td><td id="allowable-values"><ul><li>Use 'Schema Name' Property <img src="../../../../../html/images/iconInfo.png" alt="The name of the Schema to use is specified by the 'Schema Name' Property. The value of this property is used to lookup the Schema in the configured Schema Registry service." title="The name of the Schema to use is specified by the 'Schema Name' Property. The value of this property is used to lookup the Schema in the configured Schema Registry service."></img></li><li>Use 'Schema Text' Property <img src="../../../../../html/images/iconInfo.png" alt="The text of the Schema itself is specified by the 'Schema Text' Property. The value of this pr
operty must be a valid Avro Schema. If Expression Language is used, the value of the 'Schema Text' property must be valid after substituting the expressions." title="The text of the Schema itself is specified by the 'Schema Text' Property. The value of this property must be a valid Avro Schema. If Expression Language is used, the value of the 'Schema Text' property must be valid after substituting the expressions."></img></li><li>HWX Schema Reference Attributes <img src="../../../../../html/images/iconInfo.png" alt="The FlowFile contains 3 Attributes that will be used to lookup a Schema from the configured Schema Registry: 'schema.identifier', 'schema.version', and 'schema.protocol.version'" title="The FlowFile contains 3 Attributes that will be used to lookup a Schema from the configured Schema Registry: 'schema.identifier', 'schema.version', and 'schema.protocol.version'"></img></li><li>HWX Content-Encoded Schema Reference <img src="../../../../../html/images/iconInfo.png" alt="Th
e content of the FlowFile contains a reference to a schema in the Schema Registry service. The reference is encoded as a single byte indicating the 'protocol version', followed by 8 bytes indicating the schema identifier, and finally 4 bytes indicating the schema version, as per the Hortonworks Schema Registry serializers and deserializers, found at https://github.com/hortonworks/registry" title="The content of the FlowFile contains a reference to a schema in the Schema Registry service. The reference is encoded as a single byte indicating the 'protocol version', followed by 8 bytes indicating the schema identifier, and finally 4 bytes indicating the schema version, as per the Hortonworks Schema Registry serializers and deserializers, found at https://github.com/hortonworks/registry"></img></li><li>Confluent Content-Encoded Schema Reference <img src="../../../../../html/images/iconInfo.png" alt="The content of the FlowFile contains a reference to a schema in the Schema Registry serv
ice. The reference is encoded as a single 'Magic Byte' followed by 4 bytes representing the identifier of the schema, as outlined at http://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html. This is based on version 3.2.x of the Confluent Schema Registry." title="The content of the FlowFile contains a reference to a schema in the Schema Registry service. The reference is encoded as a single 'Magic Byte' followed by 4 bytes representing the identifier of the schema, as outlined at http://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html. This is based on version 3.2.x of the Confluent Schema Registry."></img></li><li>Use Embedded Avro Schema <img src="../../../../../html/images/iconInfo.png" alt="The FlowFile has the Avro Schema embedded within the content, and this schema will be used." title="The FlowFile has the Avro Schema embedded within the content, and this schema will be used."></img></li></ul></td><td id="description">Specifies h
ow to obtain the schema that is to be used for interpreting the data.</td></tr><tr><td id="name">Schema Registry</td><td id="default-value"></td><td id="allowable-values"><strong>Controller Service API: </strong><br/>SchemaRegistry<br/><strong>Implementations: </strong><a href="../../../nifi-hwx-schema-registry-nar/1.5.0/org.apache.nifi.schemaregistry.hortonworks.HortonworksSchemaRegistry/index.html">HortonworksSchemaRegistry</a><br/><a href="../../../nifi-registry-nar/1.5.0/org.apache.nifi.schemaregistry.services.AvroSchemaRegistry/index.html">AvroSchemaRegistry</a><br/><a href="../../../nifi-confluent-platform-nar/1.5.0/org.apache.nifi.confluent.schemaregistry.ConfluentSchemaRegistry/index.html">ConfluentSchemaRegistry</a></td><td id="description">Specifies the Controller Service to use for the Schema Registry</td></tr><tr><td id="name">Schema Name</td><td id="default-value">${schema.name}</td><td id="allowable-values"></td><td id="description">Specifies the name of the schema to
lookup in the Schema Registry property<br/><strong>Supports Expression Language: true</strong></td></tr><tr><td id="name">Schema Text</td><td id="default-value">${avro.schema}</td><td id="allowable-values"></td><td id="description">The text of an Avro-formatted Schema<br/><strong>Supports Expression Language: true</strong></td></tr></table><h3>State management: </h3>This component does not store state.<h3>Restricted: </h3>This component is not restricted.</body></html>
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+<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"></meta><title>AvroRecordSetWriter</title><link rel="stylesheet" href="../../../../../css/component-usage.css" type="text/css"></link></head><script type="text/javascript">window.onload = function(){if(self==top) { document.getElementById('nameHeader').style.display = "inherit"; } }</script><body><h1 id="nameHeader" style="display: none;">AvroRecordSetWriter</h1><h2>Description: </h2><p>Writes the contents of a RecordSet in Binary Avro format.</p><h3>Tags: </h3><p>avro, result, set, writer, serializer, record, recordset, row</p><h3>Properties: </h3><p>In the list below, the names of required properties appear in <strong>bold</strong>. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the <a href="../../../../../html/expression-language-guide.html">NiFi Expression Language</a>.</p><table id="properties"><tr><th>Name</th><th>Default Value</th
><th>Allowable Values</th><th>Description</th></tr><tr><td id="name"><strong>Schema Write Strategy</strong></td><td id="default-value">avro-embedded</td><td id="allowable-values"><ul><li>Embed Avro Schema <img src="../../../../../html/images/iconInfo.png" alt="The FlowFile will have the Avro schema embedded into the content, as is typical with Avro" title="The FlowFile will have the Avro schema embedded into the content, as is typical with Avro"></img></li><li>Set 'schema.name' Attribute <img src="../../../../../html/images/iconInfo.png" alt="The FlowFile will be given an attribute named 'schema.name' and this attribute will indicate the name of the schema in the Schema Registry. Note that ifthe schema for a record is not obtained from a Schema Registry, then no attribute will be added." title="The FlowFile will be given an attribute named 'schema.name' and this attribute will indicate the name of the schema in the Schema Registry. Note that ifthe schema for a record is not obtained
from a Schema Registry, then no attribute will be added."></img></li><li>Set 'avro.schema' Attribute <img src="../../../../../html/images/iconInfo.png" alt="The FlowFile will be given an attribute named 'avro.schema' and this attribute will contain the Avro Schema that describes the records in the FlowFile. The contents of the FlowFile need not be Avro, but the text of the schema will be used." title="The FlowFile will be given an attribute named 'avro.schema' and this attribute will contain the Avro Schema that describes the records in the FlowFile. The contents of the FlowFile need not be Avro, but the text of the schema will be used."></img></li><li>HWX Schema Reference Attributes <img src="../../../../../html/images/iconInfo.png" alt="The FlowFile will be given a set of 3 attributes to describe the schema: 'schema.identifier', 'schema.version', and 'schema.protocol.version'. Note that if the schema for a record does not contain the necessary identifier and version, an Exception
will be thrown when attempting to write the data." title="The FlowFile will be given a set of 3 attributes to describe the schema: 'schema.identifier', 'schema.version', and 'schema.protocol.version'. Note that if the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data."></img></li><li>HWX Content-Encoded Schema Reference <img src="../../../../../html/images/iconInfo.png" alt="The content of the FlowFile will contain a reference to a schema in the Schema Registry service. The reference is encoded as a single byte indicating the 'protocol version', followed by 8 bytes indicating the schema identifier, and finally 4 bytes indicating the schema version, as per the Hortonworks Schema Registry serializers and deserializers, as found at https://github.com/hortonworks/registry. This will be prepended to each FlowFile. Note that if the schema for a record does not contain the necessary identifier and versi
on, an Exception will be thrown when attempting to write the data." title="The content of the FlowFile will contain a reference to a schema in the Schema Registry service. The reference is encoded as a single byte indicating the 'protocol version', followed by 8 bytes indicating the schema identifier, and finally 4 bytes indicating the schema version, as per the Hortonworks Schema Registry serializers and deserializers, as found at https://github.com/hortonworks/registry. This will be prepended to each FlowFile. Note that if the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data."></img></li><li>Confluent Schema Registry Reference <img src="../../../../../html/images/iconInfo.png" alt="The content of the FlowFile will contain a reference to a schema in the Schema Registry service. The reference is encoded as a single 'Magic Byte' followed by 4 bytes representing the identifier of the schema, as out
lined at http://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html. This will be prepended to each FlowFile. Note that if the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data. This is based on the encoding used by version 3.2.x of the Confluent Schema Registry." title="The content of the FlowFile will contain a reference to a schema in the Schema Registry service. The reference is encoded as a single 'Magic Byte' followed by 4 bytes representing the identifier of the schema, as outlined at http://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html. This will be prepended to each FlowFile. Note that if the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data. This is based on the encoding used by version 3.2.x of the Confluent Schema Registry."></img></li><li>Do Not Write
Schema <img src="../../../../../html/images/iconInfo.png" alt="Do not add any schema-related information to the FlowFile." title="Do not add any schema-related information to the FlowFile."></img></li></ul></td><td id="description">Specifies how the schema for a Record should be added to the data.</td></tr><tr><td id="name"><strong>Schema Access Strategy</strong></td><td id="default-value">inherit-record-schema</td><td id="allowable-values"><ul><li>Use 'Schema Name' Property <img src="../../../../../html/images/iconInfo.png" alt="The name of the Schema to use is specified by the 'Schema Name' Property. The value of this property is used to lookup the Schema in the configured Schema Registry service." title="The name of the Schema to use is specified by the 'Schema Name' Property. The value of this property is used to lookup the Schema in the configured Schema Registry service."></img></li><li>Inherit Record Schema <img src="../../../../../html/images/iconInfo.png" alt="The schema us
ed to write records will be the same schema that was given to the Record when the Record was created." title="The schema used to write records will be the same schema that was given to the Record when the Record was created."></img></li><li>Use 'Schema Text' Property <img src="../../../../../html/images/iconInfo.png" alt="The text of the Schema itself is specified by the 'Schema Text' Property. The value of this property must be a valid Avro Schema. If Expression Language is used, the value of the 'Schema Text' property must be valid after substituting the expressions." title="The text of the Schema itself is specified by the 'Schema Text' Property. The value of this property must be a valid Avro Schema. If Expression Language is used, the value of the 'Schema Text' property must be valid after substituting the expressions."></img></li></ul></td><td id="description">Specifies how to obtain the schema that is to be used for interpreting the data.</td></tr><tr><td id="name">Schema Reg
istry</td><td id="default-value"></td><td id="allowable-values"><strong>Controller Service API: </strong><br/>SchemaRegistry<br/><strong>Implementations: </strong><a href="../../../nifi-hwx-schema-registry-nar/1.5.0/org.apache.nifi.schemaregistry.hortonworks.HortonworksSchemaRegistry/index.html">HortonworksSchemaRegistry</a><br/><a href="../../../nifi-registry-nar/1.5.0/org.apache.nifi.schemaregistry.services.AvroSchemaRegistry/index.html">AvroSchemaRegistry</a><br/><a href="../../../nifi-confluent-platform-nar/1.5.0/org.apache.nifi.confluent.schemaregistry.ConfluentSchemaRegistry/index.html">ConfluentSchemaRegistry</a></td><td id="description">Specifies the Controller Service to use for the Schema Registry</td></tr><tr><td id="name">Schema Name</td><td id="default-value">${schema.name}</td><td id="allowable-values"></td><td id="description">Specifies the name of the schema to lookup in the Schema Registry property<br/><strong>Supports Expression Language: true</strong></td></tr><tr
><td id="name">Schema Text</td><td id="default-value">${avro.schema}</td><td id="allowable-values"></td><td id="description">The text of an Avro-formatted Schema<br/><strong>Supports Expression Language: true</strong></td></tr><tr><td id="name"><strong>Compression Format</strong></td><td id="default-value">NONE</td><td id="allowable-values"><ul><li>BZIP2</li><li>DEFLATE</li><li>NONE</li><li>SNAPPY</li><li>LZO</li></ul></td><td id="description">Compression type to use when writing Avro files. Default is None.</td></tr></table><h3>State management: </h3>This component does not store state.<h3>Restricted: </h3>This component is not restricted.</body></html>
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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.
+ -->
+ <head>
+ <meta charset="utf-8"/>
+ <title>CSVReader</title>
+ <link rel="stylesheet" href="../../../../../css/component-usage.css" type="text/css"/>
+ </head>
+
+ <body>
+ <p>
+ The CSVReader Controller Service, expects input in such a way that the first line of a FlowFile specifies the name of
+ each column in the data. Following the first line, the rest of the FlowFile is expected to be valid CSV data from which
+ to form appropriate Records. The reader allows for customization of the CSV Format, such as which character should be used
+ to separate CSV fields, which character should be used for quoting and when to quote fields, which character should denote
+ a comment, etc.
+ </p>
+
+
+ <h2>Schemas and Type Coercion</h2>
+
+ <p>
+ When a record is parsed from incoming data, it is separated into fields. Each of these fields is then looked up against the
+ configured schema (by field name) in order to determine what the type of the data should be. If the field is not present in
+ the schema, that field is omitted from the Record. If the field is found in the schema, the data type of the received data
+ is compared against the data type specified in the schema. If the types match, the value of that field is used as-is. If the
+ schema indicates that the field should be of a different type, then the Controller Service will attempt to coerce the data
+ into the type specified by the schema. If the field cannot be coerced into the specified type, an Exception will be thrown.
+ </p>
+
+ <p>
+ The following rules apply when attempting to coerce a field value from one data type to another:
+ </p>
+
+ <ul>
+ <li>Any data type can be coerced into a String type.</li>
+ <li>Any numeric data type (Byte, Short, Int, Long, Float, Double) can be coerced into any other numeric data type.</li>
+ <li>Any numeric value can be coerced into a Date, Time, or Timestamp type, by assuming that the Long value is the number of
+ milliseconds since epoch (Midnight GMT, January 1, 1970).</li>
+ <li>A String value can be coerced into a Date, Time, or Timestamp type, if its format matches the configured "Date Format," "Time Format,"
+ or "Timestamp Format."</li>
+ <li>A String value can be coerced into a numeric value if the value is of the appropriate type. For example, the String value
+ <code>8</code> can be coerced into any numeric type. However, the String value <code>8.2</code> can be coerced into a Double or Float
+ type but not an Integer.</li>
+ <li>A String value of "true" or "false" (regardless of case) can be coerced into a Boolean value.</li>
+ <li>A String value that is not empty can be coerced into a Char type. If the String contains more than 1 character, the first character is used
+ and the rest of the characters are ignored.</li>
+ <li>Any "date/time" type (Date, Time, Timestamp) can be coerced into any other "date/time" type.</li>
+ <li>Any "date/time" type can be coerced into a Long type, representing the number of milliseconds since epoch (Midnight GMT, January 1, 1970).</li>
+ <li>Any "date/time" type can be coerced into a String. The format of the String is whatever DateFormat is configured for the corresponding
+ property (Date Format, Time Format, Timestamp Format property).</li>
+ </ul>
+
+ <p>
+ If none of the above rules apply when attempting to coerce a value from one data type to another, the coercion will fail and an Exception
+ will be thrown.
+ </p>
+
+
+
+ <h2>Examples</h2>
+
+ <h3>Example 1</h3>
+
+ <p>
+ As an example, consider a FlowFile whose contents consists of the following:
+ </p>
+
+<code>
+id, name, balance, join_date, notes<br />
+1, John, 48.23, 04/03/2007 "Our very<br />
+first customer!"<br />
+2, Jane, 1245.89, 08/22/2009,<br />
+3, Frank Franklin, "48481.29", 04/04/2016,<br />
+</code>
+
+ <p>
+ Additionally, let's consider that this Controller Service is configured with the Schema Registry pointing to an AvroSchemaRegistry and the schema is
+ configured as the following:
+ </p>
+
+<code>
+<pre>
+{
+ "namespace": "nifi",
+ "name": "balances",
+ "type": "record",
+ "fields": [
+ { "name": "id", "type": "int" },
+ { "name": "name": "type": "string" },
+ { "name": "balance": "type": "double" },
+ { "name": "join_date", "type": {
+ "type": "int",
+ "logicalType": "date"
+ }},
+ { "name": "notes": "type": "string" }
+ ]
+}
+</pre>
+</code>
+
+ <p>
+ In the example above, we see that the 'join_date' column is a Date type. In order for the CSV Reader to be able to properly parse a value as a date,
+ we need to provide the reader with the date format to use. In this example, we would configure the Date Format property to be <code>MM/dd/yyyy</code>
+ to indicate that it is a two-digit month, followed by a two-digit day, followed by a four-digit year - each separated by a slash.
+ In this case, the result will be that this FlowFile consists of 3 different records. The first record will contain the following values:
+ </p>
+
+ <table>
+ <head>
+ <th>Field Name</th>
+ <th>Field Value</th>
+ </head>
+ <body>
+ <tr>
+ <td>id</td>
+ <td>1</td>
+ </tr>
+ <tr>
+ <td>name</td>
+ <td>John</td>
+ </tr>
+ <tr>
+ <td>balance</td>
+ <td>48.23</td>
+ </tr>
+ <tr>
+ <td>join_date</td>
+ <td>04/03/2007</td>
+ </tr>
+ <tr>
+ <td>notes</td>
+ <td>Our very<br />first customer!</td>
+ </tr>
+ </body>
+ </table>
+
+ <p>
+ The second record will contain the following values:
+ </p>
+
+ <table>
+ <head>
+ <th>Field Name</th>
+ <th>Field Value</th>
+ </head>
+ <body>
+ <tr>
+ <td>id</td>
+ <td>2</td>
+ </tr>
+ <tr>
+ <td>name</td>
+ <td>Jane</td>
+ </tr>
+ <tr>
+ <td>balance</td>
+ <td>1245.89</td>
+ </tr>
+ <tr>
+ <td>join_date</td>
+ <td>08/22/2009</td>
+ </tr>
+ <tr>
+ <td>notes</td>
+ <td></td>
+ </tr>
+ </body>
+ </table>
+
+ <p>
+ The third record will contain the following values:
+ </p>
+
+ <table>
+ <head>
+ <th>Field Name</th>
+ <th>Field Value</th>
+ </head>
+ <body>
+ <tr>
+ <td>id</td>
+ <td>3</td>
+ </tr>
+ <tr>
+ <td>name</td>
+ <td>Frank Franklin</td>
+ </tr>
+ <tr>
+ <td>balance</td>
+ <td>48481.29</td>
+ </tr>
+ <tr>
+ <td>join_date</td>
+ <td>04/04/2016</td>
+ </tr>
+ <tr>
+ <td>notes</td>
+ <td></td>
+ </tr>
+ </body>
+ </table>
+
+
+
+ <h3>Example 2 - Schema with CSV Header Line</h3>
+
+ <p>
+ When CSV data consists of a header line that outlines the column names, the reader provides
+ a couple of different properties for configuring how to handle these column names. The
+ "Schema Access Strategy" property as well as the associated properties ("Schema Registry," "Schema Text," and
+ "Schema Name" properties) can be used to specify how to obtain the schema. If the "Schema Access Strategy" is set
+ to "Use String Fields From Header" then the header line of the CSV will be used to determine the schema. Otherwise,
+ a schema will be referenced elsewhere. But what happens if a schema is obtained from a Schema Registry, for instance,
+ and the CSV Header indicates a different set of column names?
+ </p>
+
+ <p>
+ For example, let's say that the following schema is obtained from the Schema Registry:
+ </p>
+
+<code>
+<pre>
+{
+ "namespace": "nifi",
+ "name": "balances",
+ "type": "record",
+ "fields": [
+ { "name": "id", "type": "int" },
+ { "name": "name": "type": "string" },
+ { "name": "balance": "type": "double" },
+ { "name": "memo": "type": "string" }
+ ]
+}
+</pre>
+</code>
+
+ <p>
+ And the CSV contains the following data:
+ </p>
+
+<code>
+<pre>
+id, name, balance, notes
+1, John Doe, 123.45, First Customer
+</pre>
+</code>
+
+ <p>
+ Note here that our schema indicates that the final column is named "memo" whereas the CSV Header indicates that it is named "notes."
+ </p>
+
+ <p>
+ In this case, the reader will look at the "Ignore CSV Header Column Names" property. If this property is set to "true" then the column names
+ provided in the CSV will simply be ignored and the last column will be called "memo." However, if the "Ignore CSV Header Column Names" property
+ is set to "false" then the result will be that the last column will be named "notes" and each record will have a null value for the "memo" column.
+ </p>
+
+ <p>
+ With "Ignore CSV Header Column Names" property set to "false":<br />
+ <table>
+ <head>
+ <th>Field Name</th>
+ <th>Field Value</th>
+ </head>
+ <body>
+ <tr>
+ <td>id</td>
+ <td>1</td>
+ </tr>
+ <tr>
+ <td>name</td>
+ <td>John Doe</td>
+ </tr>
+ <tr>
+ <td>balance</td>
+ <td>123.45</td>
+ </tr>
+ <tr>
+ <td>memo</td>
+ <td>First Customer</td>
+ </tr>
+ </body>
+ </table>
+ </p>
+
+
+ <p>
+ With "Ignore CSV Header Column Names" property set to "true":<br />
+ <table>
+ <head>
+ <th>Field Name</th>
+ <th>Field Value</th>
+ </head>
+ <body>
+ <tr>
+ <td>id</td>
+ <td>1</td>
+ </tr>
+ <tr>
+ <td>name</td>
+ <td>John Doe</td>
+ </tr>
+ <tr>
+ <td>balance</td>
+ <td>123.45</td>
+ </tr>
+ <tr>
+ <td>notes</td>
+ <td>First Customer</td>
+ </tr>
+ <tr>
+ <td>memo</td>
+ <td><code>null</code></td>
+ </tr>
+ </body>
+ </table>
+ </p>
+
+ </body>
+</html>
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+<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"></meta><title>CSVReader</title><link rel="stylesheet" href="../../../../../css/component-usage.css" type="text/css"></link></head><script type="text/javascript">window.onload = function(){if(self==top) { document.getElementById('nameHeader').style.display = "inherit"; } }</script><body><h1 id="nameHeader" style="display: none;">CSVReader</h1><h2>Description: </h2><p>Parses CSV-formatted data, returning each row in the CSV file as a separate record. This reader assumes that the first line in the content is the column names and all subsequent lines are the values. See Controller Service's Usage for further documentation.</p><p><a href="additionalDetails.html">Additional Details...</a></p><h3>Tags: </h3><p>csv, parse, record, row, reader, delimited, comma, separated, values</p><h3>Properties: </h3><p>In the list below, the names of required properties appear in <strong>bold</strong>. Any other properties (not in bold) are consi
dered optional. The table also indicates any default values, and whether a property supports the <a href="../../../../../html/expression-language-guide.html">NiFi Expression Language</a>.</p><table id="properties"><tr><th>Name</th><th>Default Value</th><th>Allowable Values</th><th>Description</th></tr><tr><td id="name"><strong>Schema Access Strategy</strong></td><td id="default-value">csv-header-derived</td><td id="allowable-values"><ul><li>Use 'Schema Name' Property <img src="../../../../../html/images/iconInfo.png" alt="The name of the Schema to use is specified by the 'Schema Name' Property. The value of this property is used to lookup the Schema in the configured Schema Registry service." title="The name of the Schema to use is specified by the 'Schema Name' Property. The value of this property is used to lookup the Schema in the configured Schema Registry service."></img></li><li>Use 'Schema Text' Property <img src="../../../../../html/images/iconInfo.png" alt="The text of the
Schema itself is specified by the 'Schema Text' Property. The value of this property must be a valid Avro Schema. If Expression Language is used, the value of the 'Schema Text' property must be valid after substituting the expressions." title="The text of the Schema itself is specified by the 'Schema Text' Property. The value of this property must be a valid Avro Schema. If Expression Language is used, the value of the 'Schema Text' property must be valid after substituting the expressions."></img></li><li>HWX Schema Reference Attributes <img src="../../../../../html/images/iconInfo.png" alt="The FlowFile contains 3 Attributes that will be used to lookup a Schema from the configured Schema Registry: 'schema.identifier', 'schema.version', and 'schema.protocol.version'" title="The FlowFile contains 3 Attributes that will be used to lookup a Schema from the configured Schema Registry: 'schema.identifier', 'schema.version', and 'schema.protocol.version'"></img></li><li>HWX Content-Encod
ed Schema Reference <img src="../../../../../html/images/iconInfo.png" alt="The content of the FlowFile contains a reference to a schema in the Schema Registry service. The reference is encoded as a single byte indicating the 'protocol version', followed by 8 bytes indicating the schema identifier, and finally 4 bytes indicating the schema version, as per the Hortonworks Schema Registry serializers and deserializers, found at https://github.com/hortonworks/registry" title="The content of the FlowFile contains a reference to a schema in the Schema Registry service. The reference is encoded as a single byte indicating the 'protocol version', followed by 8 bytes indicating the schema identifier, and finally 4 bytes indicating the schema version, as per the Hortonworks Schema Registry serializers and deserializers, found at https://github.com/hortonworks/registry"></img></li><li>Confluent Content-Encoded Schema Reference <img src="../../../../../html/images/iconInfo.png" alt="The conten
t of the FlowFile contains a reference to a schema in the Schema Registry service. The reference is encoded as a single 'Magic Byte' followed by 4 bytes representing the identifier of the schema, as outlined at http://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html. This is based on version 3.2.x of the Confluent Schema Registry." title="The content of the FlowFile contains a reference to a schema in the Schema Registry service. The reference is encoded as a single 'Magic Byte' followed by 4 bytes representing the identifier of the schema, as outlined at http://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html. This is based on version 3.2.x of the Confluent Schema Registry."></img></li><li>Use String Fields From Header <img src="../../../../../html/images/iconInfo.png" alt="The first non-comment line of the CSV file is a header line that contains the names of the columns. The schema will be derived by using the column names in the hea
der and assuming that all columns are of type String." title="The first non-comment line of the CSV file is a header line that contains the names of the columns. The schema will be derived by using the column names in the header and assuming that all columns are of type String."></img></li></ul></td><td id="description">Specifies how to obtain the schema that is to be used for interpreting the data.</td></tr><tr><td id="name">Schema Registry</td><td id="default-value"></td><td id="allowable-values"><strong>Controller Service API: </strong><br/>SchemaRegistry<br/><strong>Implementations: </strong><a href="../../../nifi-hwx-schema-registry-nar/1.5.0/org.apache.nifi.schemaregistry.hortonworks.HortonworksSchemaRegistry/index.html">HortonworksSchemaRegistry</a><br/><a href="../../../nifi-registry-nar/1.5.0/org.apache.nifi.schemaregistry.services.AvroSchemaRegistry/index.html">AvroSchemaRegistry</a><br/><a href="../../../nifi-confluent-platform-nar/1.5.0/org.apache.nifi.confluent.schemare
gistry.ConfluentSchemaRegistry/index.html">ConfluentSchemaRegistry</a></td><td id="description">Specifies the Controller Service to use for the Schema Registry</td></tr><tr><td id="name">Schema Name</td><td id="default-value">${schema.name}</td><td id="allowable-values"></td><td id="description">Specifies the name of the schema to lookup in the Schema Registry property<br/><strong>Supports Expression Language: true</strong></td></tr><tr><td id="name">Schema Text</td><td id="default-value">${avro.schema}</td><td id="allowable-values"></td><td id="description">The text of an Avro-formatted Schema<br/><strong>Supports Expression Language: true</strong></td></tr><tr><td id="name"><strong>CSV Parser</strong></td><td id="default-value">commons-csv</td><td id="allowable-values"><ul><li>Apache Commons CSV <img src="../../../../../html/images/iconInfo.png" alt="The CSV parser implementation from the Apache Commons CSV library." title="The CSV parser implementation from the Apache Commons CSV
library."></img></li><li>Jackson CSV <img src="../../../../../html/images/iconInfo.png" alt="The CSV parser implementation from the Jackson Dataformats library." title="The CSV parser implementation from the Jackson Dataformats library."></img></li></ul></td><td id="description">Specifies which parser to use to read CSV records. NOTE: Different parsers may support different subsets of functionality and may also exhibit different levels of performance.</td></tr><tr><td id="name">Date Format</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">Specifies the format to use when reading/writing Date fields. If not specified, Date fields will be assumed to be number of milliseconds since epoch (Midnight, Jan 1, 1970 GMT). If specified, the value must match the Java Simple Date Format (for example, MM/dd/yyyy for a two-digit month, followed by a two-digit day, followed by a four-digit year, all separated by '/' characters, as in 01/01/2017).</td></tr><tr><td
id="name">Time Format</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">Specifies the format to use when reading/writing Time fields. If not specified, Time fields will be assumed to be number of milliseconds since epoch (Midnight, Jan 1, 1970 GMT). If specified, the value must match the Java Simple Date Format (for example, HH:mm:ss for a two-digit hour in 24-hour format, followed by a two-digit minute, followed by a two-digit second, all separated by ':' characters, as in 18:04:15).</td></tr><tr><td id="name">Timestamp Format</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">Specifies the format to use when reading/writing Timestamp fields. If not specified, Timestamp fields will be assumed to be number of milliseconds since epoch (Midnight, Jan 1, 1970 GMT). If specified, the value must match the Java Simple Date Format (for example, MM/dd/yyyy HH:mm:ss for a two-digit month, followed by a two-digit day, followe
d by a four-digit year, all separated by '/' characters; and then followed by a two-digit hour in 24-hour format, followed by a two-digit minute, followed by a two-digit second, all separated by ':' characters, as in 01/01/2017 18:04:15).</td></tr><tr><td id="name"><strong>CSV Format</strong></td><td id="default-value">custom</td><td id="allowable-values"><ul><li>Custom Format <img src="../../../../../html/images/iconInfo.png" alt="The format of the CSV is configured by using the properties of this Controller Service, such as Value Separator" title="The format of the CSV is configured by using the properties of this Controller Service, such as Value Separator"></img></li><li>RFC 4180 <img src="../../../../../html/images/iconInfo.png" alt="CSV data follows the RFC 4180 Specification defined at https://tools.ietf.org/html/rfc4180" title="CSV data follows the RFC 4180 Specification defined at https://tools.ietf.org/html/rfc4180"></img></li><li>Microsoft Excel <img src="../../../../../h
tml/images/iconInfo.png" alt="CSV data follows the format used by Microsoft Excel" title="CSV data follows the format used by Microsoft Excel"></img></li><li>Tab-Delimited <img src="../../../../../html/images/iconInfo.png" alt="CSV data is Tab-Delimited instead of Comma Delimited" title="CSV data is Tab-Delimited instead of Comma Delimited"></img></li><li>MySQL Format <img src="../../../../../html/images/iconInfo.png" alt="CSV data follows the format used by MySQL" title="CSV data follows the format used by MySQL"></img></li><li>Informix Unload <img src="../../../../../html/images/iconInfo.png" alt="The format used by Informix when issuing the UNLOAD TO file_name command" title="The format used by Informix when issuing the UNLOAD TO file_name command"></img></li><li>Informix Unload Escape Disabled <img src="../../../../../html/images/iconInfo.png" alt="The format used by Informix when issuing the UNLOAD TO file_name command with escaping disabled" title="The format used by Informix
when issuing the UNLOAD TO file_name command with escaping disabled"></img></li></ul></td><td id="description">Specifies which "format" the CSV data is in, or specifies if custom formatting should be used.</td></tr><tr><td id="name"><strong>Value Separator</strong></td><td id="default-value">,</td><td id="allowable-values"></td><td id="description">The character that is used to separate values/fields in a CSV Record</td></tr><tr><td id="name"><strong>Treat First Line as Header</strong></td><td id="default-value">false</td><td id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">Specifies whether or not the first line of CSV should be considered a Header or should be considered a record. If the Schema Access Strategy indicates that the columns must be defined in the header, then this property will be ignored, since the header must always be present and won't be processed as a Record. Otherwise, if 'true', then the first line of CSV data will not be proc
essed as a record and if 'false',then the first line will be interpreted as a record.</td></tr><tr><td id="name">Ignore CSV Header Column Names</td><td id="default-value">false</td><td id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">If the first line of a CSV is a header, and the configured schema does not match the fields named in the header line, this controls how the Reader will interpret the fields. If this property is true, then the field names mapped to each column are driven only by the configured schema and any fields not in the schema will be ignored. If this property is false, then the field names found in the CSV Header will be used as the names of the fields.</td></tr><tr><td id="name"><strong>Quote Character</strong></td><td id="default-value">"</td><td id="allowable-values"></td><td id="description">The character that is used to quote values so that escape characters do not have to be used</td></tr><tr><td id="name"><strong>Escape Ch
aracter</strong></td><td id="default-value">\</td><td id="allowable-values"></td><td id="description">The character that is used to escape characters that would otherwise have a specific meaning to the CSV Parser.</td></tr><tr><td id="name">Comment Marker</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">The character that is used to denote the start of a comment. Any line that begins with this comment will be ignored.</td></tr><tr><td id="name">Null String</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">Specifies a String that, if present as a value in the CSV, should be considered a null field instead of using the literal value.</td></tr><tr><td id="name"><strong>Trim Fields</strong></td><td id="default-value">true</td><td id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">Whether or not white space should be removed from the beginning and end of fields</td></tr><tr><td id="name"
><strong>Character Set</strong></td><td id="default-value">UTF-8</td><td id="allowable-values"></td><td id="description">The Character Encoding that is used to encode/decode the CSV file<br/><strong>Supports Expression Language: true</strong></td></tr></table><h3>State management: </h3>This component does not store state.<h3>Restricted: </h3>This component is not restricted.</body></html>
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+<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"></meta><title>CSVRecordSetWriter</title><link rel="stylesheet" href="../../../../../css/component-usage.css" type="text/css"></link></head><script type="text/javascript">window.onload = function(){if(self==top) { document.getElementById('nameHeader').style.display = "inherit"; } }</script><body><h1 id="nameHeader" style="display: none;">CSVRecordSetWriter</h1><h2>Description: </h2><p>Writes the contents of a RecordSet as CSV data. The first line written will be the column names (unless the 'Include Header Line' property is false). All subsequent lines will be the values corresponding to the record fields.</p><h3>Tags: </h3><p>csv, result, set, recordset, record, writer, serializer, row, tsv, tab, separated, delimited</p><h3>Properties: </h3><p>In the list below, the names of required properties appear in <strong>bold</strong>. Any other properties (not in bold) are considered optional. The table also indicates any default va
lues, and whether a property supports the <a href="../../../../../html/expression-language-guide.html">NiFi Expression Language</a>.</p><table id="properties"><tr><th>Name</th><th>Default Value</th><th>Allowable Values</th><th>Description</th></tr><tr><td id="name"><strong>Schema Write Strategy</strong></td><td id="default-value">schema-name</td><td id="allowable-values"><ul><li>Set 'schema.name' Attribute <img src="../../../../../html/images/iconInfo.png" alt="The FlowFile will be given an attribute named 'schema.name' and this attribute will indicate the name of the schema in the Schema Registry. Note that ifthe schema for a record is not obtained from a Schema Registry, then no attribute will be added." title="The FlowFile will be given an attribute named 'schema.name' and this attribute will indicate the name of the schema in the Schema Registry. Note that ifthe schema for a record is not obtained from a Schema Registry, then no attribute will be added."></img></li><li>Set 'avro
.schema' Attribute <img src="../../../../../html/images/iconInfo.png" alt="The FlowFile will be given an attribute named 'avro.schema' and this attribute will contain the Avro Schema that describes the records in the FlowFile. The contents of the FlowFile need not be Avro, but the text of the schema will be used." title="The FlowFile will be given an attribute named 'avro.schema' and this attribute will contain the Avro Schema that describes the records in the FlowFile. The contents of the FlowFile need not be Avro, but the text of the schema will be used."></img></li><li>HWX Schema Reference Attributes <img src="../../../../../html/images/iconInfo.png" alt="The FlowFile will be given a set of 3 attributes to describe the schema: 'schema.identifier', 'schema.version', and 'schema.protocol.version'. Note that if the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data." title="The FlowFile will be giv
en a set of 3 attributes to describe the schema: 'schema.identifier', 'schema.version', and 'schema.protocol.version'. Note that if the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data."></img></li><li>HWX Content-Encoded Schema Reference <img src="../../../../../html/images/iconInfo.png" alt="The content of the FlowFile will contain a reference to a schema in the Schema Registry service. The reference is encoded as a single byte indicating the 'protocol version', followed by 8 bytes indicating the schema identifier, and finally 4 bytes indicating the schema version, as per the Hortonworks Schema Registry serializers and deserializers, as found at https://github.com/hortonworks/registry. This will be prepended to each FlowFile. Note that if the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data." title="The cont
ent of the FlowFile will contain a reference to a schema in the Schema Registry service. The reference is encoded as a single byte indicating the 'protocol version', followed by 8 bytes indicating the schema identifier, and finally 4 bytes indicating the schema version, as per the Hortonworks Schema Registry serializers and deserializers, as found at https://github.com/hortonworks/registry. This will be prepended to each FlowFile. Note that if the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data."></img></li><li>Confluent Schema Registry Reference <img src="../../../../../html/images/iconInfo.png" alt="The content of the FlowFile will contain a reference to a schema in the Schema Registry service. The reference is encoded as a single 'Magic Byte' followed by 4 bytes representing the identifier of the schema, as outlined at http://docs.confluent.io/current/schema-registry/docs/serializer-formatter
.html. This will be prepended to each FlowFile. Note that if the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data. This is based on the encoding used by version 3.2.x of the Confluent Schema Registry." title="The content of the FlowFile will contain a reference to a schema in the Schema Registry service. The reference is encoded as a single 'Magic Byte' followed by 4 bytes representing the identifier of the schema, as outlined at http://docs.confluent.io/current/schema-registry/docs/serializer-formatter.html. This will be prepended to each FlowFile. Note that if the schema for a record does not contain the necessary identifier and version, an Exception will be thrown when attempting to write the data. This is based on the encoding used by version 3.2.x of the Confluent Schema Registry."></img></li><li>Do Not Write Schema <img src="../../../../../html/images/iconInfo.png" alt="Do not add any schem
a-related information to the FlowFile." title="Do not add any schema-related information to the FlowFile."></img></li></ul></td><td id="description">Specifies how the schema for a Record should be added to the data.</td></tr><tr><td id="name"><strong>Schema Access Strategy</strong></td><td id="default-value">inherit-record-schema</td><td id="allowable-values"><ul><li>Use 'Schema Name' Property <img src="../../../../../html/images/iconInfo.png" alt="The name of the Schema to use is specified by the 'Schema Name' Property. The value of this property is used to lookup the Schema in the configured Schema Registry service." title="The name of the Schema to use is specified by the 'Schema Name' Property. The value of this property is used to lookup the Schema in the configured Schema Registry service."></img></li><li>Inherit Record Schema <img src="../../../../../html/images/iconInfo.png" alt="The schema used to write records will be the same schema that was given to the Record when the R
ecord was created." title="The schema used to write records will be the same schema that was given to the Record when the Record was created."></img></li><li>Use 'Schema Text' Property <img src="../../../../../html/images/iconInfo.png" alt="The text of the Schema itself is specified by the 'Schema Text' Property. The value of this property must be a valid Avro Schema. If Expression Language is used, the value of the 'Schema Text' property must be valid after substituting the expressions." title="The text of the Schema itself is specified by the 'Schema Text' Property. The value of this property must be a valid Avro Schema. If Expression Language is used, the value of the 'Schema Text' property must be valid after substituting the expressions."></img></li></ul></td><td id="description">Specifies how to obtain the schema that is to be used for interpreting the data.</td></tr><tr><td id="name">Schema Registry</td><td id="default-value"></td><td id="allowable-values"><strong>Controller
Service API: </strong><br/>SchemaRegistry<br/><strong>Implementations: </strong><a href="../../../nifi-hwx-schema-registry-nar/1.5.0/org.apache.nifi.schemaregistry.hortonworks.HortonworksSchemaRegistry/index.html">HortonworksSchemaRegistry</a><br/><a href="../../../nifi-registry-nar/1.5.0/org.apache.nifi.schemaregistry.services.AvroSchemaRegistry/index.html">AvroSchemaRegistry</a><br/><a href="../../../nifi-confluent-platform-nar/1.5.0/org.apache.nifi.confluent.schemaregistry.ConfluentSchemaRegistry/index.html">ConfluentSchemaRegistry</a></td><td id="description">Specifies the Controller Service to use for the Schema Registry</td></tr><tr><td id="name">Schema Name</td><td id="default-value">${schema.name}</td><td id="allowable-values"></td><td id="description">Specifies the name of the schema to lookup in the Schema Registry property<br/><strong>Supports Expression Language: true</strong></td></tr><tr><td id="name">Schema Text</td><td id="default-value">${avro.schema}</td><td id="al
lowable-values"></td><td id="description">The text of an Avro-formatted Schema<br/><strong>Supports Expression Language: true</strong></td></tr><tr><td id="name">Date Format</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">Specifies the format to use when reading/writing Date fields. If not specified, Date fields will be assumed to be number of milliseconds since epoch (Midnight, Jan 1, 1970 GMT). If specified, the value must match the Java Simple Date Format (for example, MM/dd/yyyy for a two-digit month, followed by a two-digit day, followed by a four-digit year, all separated by '/' characters, as in 01/01/2017).</td></tr><tr><td id="name">Time Format</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">Specifies the format to use when reading/writing Time fields. If not specified, Time fields will be assumed to be number of milliseconds since epoch (Midnight, Jan 1, 1970 GMT). If specified, the value must match th
e Java Simple Date Format (for example, HH:mm:ss for a two-digit hour in 24-hour format, followed by a two-digit minute, followed by a two-digit second, all separated by ':' characters, as in 18:04:15).</td></tr><tr><td id="name">Timestamp Format</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">Specifies the format to use when reading/writing Timestamp fields. If not specified, Timestamp fields will be assumed to be number of milliseconds since epoch (Midnight, Jan 1, 1970 GMT). If specified, the value must match the Java Simple Date Format (for example, MM/dd/yyyy HH:mm:ss for a two-digit month, followed by a two-digit day, followed by a four-digit year, all separated by '/' characters; and then followed by a two-digit hour in 24-hour format, followed by a two-digit minute, followed by a two-digit second, all separated by ':' characters, as in 01/01/2017 18:04:15).</td></tr><tr><td id="name"><strong>CSV Format</strong></td><td id="default-value">c
ustom</td><td id="allowable-values"><ul><li>Custom Format <img src="../../../../../html/images/iconInfo.png" alt="The format of the CSV is configured by using the properties of this Controller Service, such as Value Separator" title="The format of the CSV is configured by using the properties of this Controller Service, such as Value Separator"></img></li><li>RFC 4180 <img src="../../../../../html/images/iconInfo.png" alt="CSV data follows the RFC 4180 Specification defined at https://tools.ietf.org/html/rfc4180" title="CSV data follows the RFC 4180 Specification defined at https://tools.ietf.org/html/rfc4180"></img></li><li>Microsoft Excel <img src="../../../../../html/images/iconInfo.png" alt="CSV data follows the format used by Microsoft Excel" title="CSV data follows the format used by Microsoft Excel"></img></li><li>Tab-Delimited <img src="../../../../../html/images/iconInfo.png" alt="CSV data is Tab-Delimited instead of Comma Delimited" title="CSV data is Tab-Delimited instead
of Comma Delimited"></img></li><li>MySQL Format <img src="../../../../../html/images/iconInfo.png" alt="CSV data follows the format used by MySQL" title="CSV data follows the format used by MySQL"></img></li><li>Informix Unload <img src="../../../../../html/images/iconInfo.png" alt="The format used by Informix when issuing the UNLOAD TO file_name command" title="The format used by Informix when issuing the UNLOAD TO file_name command"></img></li><li>Informix Unload Escape Disabled <img src="../../../../../html/images/iconInfo.png" alt="The format used by Informix when issuing the UNLOAD TO file_name command with escaping disabled" title="The format used by Informix when issuing the UNLOAD TO file_name command with escaping disabled"></img></li></ul></td><td id="description">Specifies which "format" the CSV data is in, or specifies if custom formatting should be used.</td></tr><tr><td id="name"><strong>Value Separator</strong></td><td id="default-value">,</td><td id="allowable-value
s"></td><td id="description">The character that is used to separate values/fields in a CSV Record</td></tr><tr><td id="name"><strong>Include Header Line</strong></td><td id="default-value">true</td><td id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">Specifies whether or not the CSV column names should be written out as the first line.</td></tr><tr><td id="name"><strong>Quote Character</strong></td><td id="default-value">"</td><td id="allowable-values"></td><td id="description">The character that is used to quote values so that escape characters do not have to be used</td></tr><tr><td id="name"><strong>Escape Character</strong></td><td id="default-value">\</td><td id="allowable-values"></td><td id="description">The character that is used to escape characters that would otherwise have a specific meaning to the CSV Parser.</td></tr><tr><td id="name">Comment Marker</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">The
character that is used to denote the start of a comment. Any line that begins with this comment will be ignored.</td></tr><tr><td id="name">Null String</td><td id="default-value"></td><td id="allowable-values"></td><td id="description">Specifies a String that, if present as a value in the CSV, should be considered a null field instead of using the literal value.</td></tr><tr><td id="name"><strong>Trim Fields</strong></td><td id="default-value">true</td><td id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">Whether or not white space should be removed from the beginning and end of fields</td></tr><tr><td id="name"><strong>Quote Mode</strong></td><td id="default-value">MINIMAL</td><td id="allowable-values"><ul><li>Quote All Values <img src="../../../../../html/images/iconInfo.png" alt="All values will be quoted using the configured quote character." title="All values will be quoted using the configured quote character."></img></li><li>Quote Minimal <i
mg src="../../../../../html/images/iconInfo.png" alt="Values will be quoted only if they are contain special characters such as newline characters or field separators." title="Values will be quoted only if they are contain special characters such as newline characters or field separators."></img></li><li>Quote Non-Numeric Values <img src="../../../../../html/images/iconInfo.png" alt="Values will be quoted unless the value is a number." title="Values will be quoted unless the value is a number."></img></li><li>Do Not Quote Values <img src="../../../../../html/images/iconInfo.png" alt="Values will not be quoted. Instead, all special characters will be escaped using the configured escape character." title="Values will not be quoted. Instead, all special characters will be escaped using the configured escape character."></img></li></ul></td><td id="description">Specifies how fields should be quoted when they are written</td></tr><tr><td id="name"><strong>Record Separator</strong></td><t
d id="default-value">\n</td><td id="allowable-values"></td><td id="description">Specifies the characters to use in order to separate CSV Records</td></tr><tr><td id="name"><strong>Include Trailing Delimiter</strong></td><td id="default-value">false</td><td id="allowable-values"><ul><li>true</li><li>false</li></ul></td><td id="description">If true, a trailing delimiter will be added to each CSV Record that is written. If false, the trailing delimiter will be omitted.</td></tr><tr><td id="name"><strong>Character Set</strong></td><td id="default-value">UTF-8</td><td id="allowable-values"></td><td id="description">The Character Encoding that is used to encode/decode the CSV file<br/><strong>Supports Expression Language: true</strong></td></tr></table><h3>State management: </h3>This component does not store state.<h3>Restricted: </h3>This component is not restricted.</body></html>
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