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| <div class="subTitle">org.apache.calcite.adapter.kafka</div> |
| <h2 title="Class KafkaMessageEnumerator" class="title">Class KafkaMessageEnumerator<K,V></h2> |
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| <ul class="inheritance"> |
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| <ul class="inheritance"> |
| <li>org.apache.calcite.adapter.kafka.KafkaMessageEnumerator<K,V></li> |
| </ul> |
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| <div class="description"> |
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| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a>, <a href="../../../../../org/apache/calcite/linq4j/Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]></dd> |
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| <br> |
| <pre>public class <span class="typeNameLabel">KafkaMessageEnumerator<K,V></span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> |
| implements <a href="../../../../../org/apache/calcite/linq4j/Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="https://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">Enumerator to read data from <code>Consumer</code>, |
| and converted into SQL rows with <a href="../../../../../org/apache/calcite/adapter/kafka/KafkaRowConverter.html" title="interface in org.apache.calcite.adapter.kafka"><code>KafkaRowConverter</code></a>.</div> |
| </li> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/kafka/KafkaMessageEnumerator.html#close--">close</a></span>()</code> |
| <div class="block">Closes this enumerable and releases resources.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/kafka/KafkaMessageEnumerator.html#current--">current</a></span>()</code> |
| <div class="block">It returns an Array of Object, with each element represents a field of row.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/kafka/KafkaMessageEnumerator.html#moveNext--">moveNext</a></span>()</code> |
| <div class="block">Advances the enumerator to the next element of the collection.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/kafka/KafkaMessageEnumerator.html#reset--">reset</a></span>()</code> |
| <div class="block">Sets the enumerator to its initial position, which is before the first |
| element in the collection.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
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| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://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="https://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="https://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="https://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="https://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="https://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="https://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="https://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="https://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="https://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="https://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> |
| </ul> |
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| </ul> |
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| <!-- ============ METHOD DETAIL ========== --> |
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| <h3>Method Detail</h3> |
| <a name="current--"> |
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| <h4>current</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[] current()</pre> |
| <div class="block">It returns an Array of Object, with each element represents a field of row.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/linq4j/Enumerator.html#current--">current</a></code> in interface <code><a href="../../../../../org/apache/calcite/linq4j/Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Current element</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="moveNext--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>moveNext</h4> |
| <pre>public boolean moveNext()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/calcite/linq4j/Enumerator.html#moveNext--">Enumerator</a></code></span></div> |
| <div class="block">Advances the enumerator to the next element of the collection. |
| |
| <p>After an enumerator is created or after the <code>reset</code> method is |
| called, an enumerator is positioned before the first element of the |
| collection, and the first call to the <code>moveNext</code> method moves the |
| enumerator over the first element of the collection. |
| |
| <p>If <code>moveNext</code> passes the end of the collection, the enumerator |
| is positioned after the last element in the collection and |
| <code>moveNext</code> returns <code>false</code>. When the enumerator is at this |
| position, subsequent calls to <code>moveNext</code> also return <code>false</code> |
| until <code>#reset</code> is called. |
| |
| <p>An enumerator remains valid as long as the collection remains |
| unchanged. If changes are made to the collection, such as adding, |
| modifying, or deleting elements, the enumerator is irrecoverably |
| invalidated. The next call to <code>moveNext</code> or <a href="../../../../../org/apache/calcite/linq4j/Enumerator.html#reset--"><code>Enumerator.reset()</code></a> may, |
| at the discretion of the implementation, throw a |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/ConcurrentModificationException.html?is-external=true" title="class or interface in java.util"><code>ConcurrentModificationException</code></a>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/linq4j/Enumerator.html#moveNext--">moveNext</a></code> in interface <code><a href="../../../../../org/apache/calcite/linq4j/Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>true</code> if the enumerator was successfully advanced to the |
| next element; <code>false</code> if the enumerator has passed the end of |
| the collection</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="reset--"> |
| <!-- --> |
| </a> |
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| <li class="blockList"> |
| <h4>reset</h4> |
| <pre>public void reset()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/calcite/linq4j/Enumerator.html#reset--">Enumerator</a></code></span></div> |
| <div class="block">Sets the enumerator to its initial position, which is before the first |
| element in the collection. |
| |
| <p>An enumerator remains valid as long as the collection remains |
| unchanged. If changes are made to the collection, such as adding, |
| modifying, or deleting elements, the enumerator is irrecoverably |
| invalidated. The next call to <a href="../../../../../org/apache/calcite/linq4j/Enumerator.html#moveNext--"><code>Enumerator.moveNext()</code></a> or <code>reset</code> may, |
| at the discretion of the implementation, throw a |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/ConcurrentModificationException.html?is-external=true" title="class or interface in java.util"><code>ConcurrentModificationException</code></a>. |
| |
| <p>This method is optional; it may throw |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang"><code>UnsupportedOperationException</code></a>. |
| |
| <p><b>Notes to Implementers</b> |
| |
| <p>All calls to Reset must result in the same state for the enumerator. |
| The preferred implementation is to move the enumerator to the beginning |
| of the collection, before the first element. This invalidates the |
| enumerator if the collection has been modified since the enumerator was |
| created, which is consistent with <a href="../../../../../org/apache/calcite/linq4j/Enumerator.html#moveNext--"><code>Enumerator.moveNext()</code></a> and |
| <a href="../../../../../org/apache/calcite/linq4j/Enumerator.html#current--"><code>Enumerator.current()</code></a>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/linq4j/Enumerator.html#reset--">reset</a></code> in interface <code><a href="../../../../../org/apache/calcite/linq4j/Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="close--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>close</h4> |
| <pre>public void close()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/calcite/linq4j/Enumerator.html#close--">Enumerator</a></code></span></div> |
| <div class="block">Closes this enumerable and releases resources. |
| |
| <p>This method is idempotent. Calling it multiple times has the same effect |
| as calling it once.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang">close</a></code> in interface <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/linq4j/Enumerator.html#close--">close</a></code> in interface <code><a href="../../../../../org/apache/calcite/linq4j/Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]></code></dd> |
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