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| <div class="subTitle">org.apache.edgent.connectors.csv</div> |
| <h2 title="Class Csv" class="title">Class Csv</h2> |
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| <ul class="inheritance"> |
| <li><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
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| <li>org.apache.edgent.connectors.csv.Csv</li> |
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| <pre>public class <span class="typeNameLabel">Csv</span> |
| extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Utilities for working with CSV strings. |
| <P> |
| Basically, per IETF RFC-4180: |
| <UL> |
| <LI>Fields are separated by a single character. The default field |
| separator is a comma. A different separator may be specified |
| (e.g., a colon, tab).</LI> |
| <LI>All whitespace between field separators is part of the field's parsed value.</LI> |
| <LI>A field may be quoted using the double-quote character. |
| A field containing the field separator must be quoted. |
| The double-quotes surrounding a quoted field are omitted in the |
| field's parsed value.</LI> |
| <LI>A double-quote to be included in a field's parsed value must be |
| represented by a pair of double quotes.</LI> |
| </UL> |
| |
| Sample use: |
| <pre><code> |
| // Create a stream of "car" JsonObjects from a "cars.csv" file. |
| String fieldNames = new String[]{"year", "make", "model"}); |
| |
| TStream<String> pathnames = topology.strings("cars.csv"); |
| TStream<JsonObject> cars = FileStreams.textFileReader(topology, pathnames) |
| .map(csv -> toJson(parseCsv(csv), fieldNames); |
| cars.print(); |
| </code></pre></div> |
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| <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/connectors/csv/Csv.html#parseCsv-java.lang.String-">parseCsv</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> csv)</code> |
| <div class="block">Parse a CSV string into its fields using comma for the field separator.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/connectors/csv/Csv.html#parseCsv-java.lang.String-char-">parseCsv</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> csv, |
| char separator)</code> |
| <div class="block">Parse a CSV string into its fields using the specified field separator.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static com.google.gson.JsonObject</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/connectors/csv/Csv.html#toJson-java.util.List-java.lang.String...-">toJson</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> fields, |
| <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>... fieldNames)</code> |
| <div class="block">Create a <code>JsonObject</code> containing the specified <code>fieldNames</code> |
| properties each with its corresponding value from <code>fields</code>.</div> |
| </td> |
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| <code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
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| <h4>parseCsv</h4> |
| <pre>public static <a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> parseCsv(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> csv)</pre> |
| <div class="block">Parse a CSV string into its fields using comma for the field separator.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>csv</code> - the csv string</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the fields</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if the csv is malformed</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/edgent/connectors/csv/Csv.html#parseCsv-java.lang.String-char-"><code>parseCsv(String, char)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="parseCsv-java.lang.String-char-"> |
| <!-- --> |
| </a> |
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| <h4>parseCsv</h4> |
| <pre>public static <a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> parseCsv(<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> csv, |
| char separator)</pre> |
| <div class="block">Parse a CSV string into its fields using the specified field separator.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>csv</code> - the csv string</dd> |
| <dd><code>separator</code> - the separator to use</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the fields</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if the csv is malformed</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/edgent/connectors/csv/Csv.html#parseCsv-java.lang.String-"><code>parseCsv(String)</code></a></dd> |
| </dl> |
| </li> |
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| <a name="toJson-java.util.List-java.lang.String...-"> |
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| <h4>toJson</h4> |
| <pre>public static com.google.gson.JsonObject toJson(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> fields, |
| <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>... fieldNames)</pre> |
| <div class="block">Create a <code>JsonObject</code> containing the specified <code>fieldNames</code> |
| properties each with its corresponding value from <code>fields</code>. |
| <P> |
| Each property is set as a string value. |
| The <code>JsonObject.getAsJsonPrimitive().getAs*()</code> methods allowing |
| accessing the property as the requested type. |
| </P> |
| <P> |
| A field is omitted from the JsonObject if its corresponding |
| field name is null or the empty string.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>fields</code> - the field values</dd> |
| <dd><code>fieldNames</code> - the corresponding field value names</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the JsonObject</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if the number of fields and the number |
| of fieldNames don't match</dd> |
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