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| <li>Summary: </li> |
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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.linq4j</a></div> |
| <h2 title="Class EnumerableDefaults.MergeJoinEnumerator" class="title">Class EnumerableDefaults.MergeJoinEnumerator<TResult,​TSource,​TInner,​TKey extends java.lang.Comparable<TKey>></h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.linq4j.EnumerableDefaults.MergeJoinEnumerator<TResult,​TSource,​TInner,​TKey></li> |
| </ul> |
| </li> |
| </ul> |
| <div class="description"> |
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| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>TResult</code> - result type</dd> |
| <dd><code>TSource</code> - left input record type</dd> |
| <dd><code>TKey</code> - key type</dd> |
| <dd><code>TInner</code> - right input record type</dd> |
| </dl> |
| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code>java.lang.AutoCloseable</code>, <code><a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><TResult></code></dd> |
| </dl> |
| <dl> |
| <dt>Enclosing class:</dt> |
| <dd><a href="EnumerableDefaults.html" title="class in org.apache.calcite.linq4j">EnumerableDefaults</a></dd> |
| </dl> |
| <hr> |
| <pre>private static class <span class="typeNameLabel">EnumerableDefaults.MergeJoinEnumerator<TResult,​TSource,​TInner,​TKey extends java.lang.Comparable<TKey>></span> |
| extends java.lang.Object |
| implements <a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><TResult></pre> |
| <div class="block">Enumerator that performs a merge join on its sorted inputs.</div> |
| </li> |
| </ul> |
| </div> |
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| <!-- =========== FIELD SUMMARY =========== --> |
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| </a> |
| <h3>Field Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) <a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><java.util.List<java.lang.Object>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#cartesians">cartesians</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#done">done</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="function/Function1.html" title="interface in org.apache.calcite.linq4j.function">Function1</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TKey</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#innerKeySelector">innerKeySelector</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#leftEnumerator">leftEnumerator</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) java.util.List<<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#lefts">lefts</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="function/Function1.html" title="interface in org.apache.calcite.linq4j.function">Function1</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TKey</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#outerKeySelector">outerKeySelector</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="function/Function2.html" title="interface in org.apache.calcite.linq4j.function">Function2</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TResult</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#resultSelector">resultSelector</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#rightEnumerator">rightEnumerator</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) java.util.List<<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#rights">rights</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </table> |
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| </ul> |
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| <tr> |
| <th class="colFirst" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.linq4j.Enumerator,org.apache.calcite.linq4j.Enumerator,org.apache.calcite.linq4j.function.Function1,org.apache.calcite.linq4j.function.Function1,org.apache.calcite.linq4j.function.Function2)">MergeJoinEnumerator</a></span>​(<a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>> leftEnumerator, |
| <a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>> rightEnumerator, |
| <a href="function/Function1.html" title="interface in org.apache.calcite.linq4j.function">Function1</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TKey</a>> outerKeySelector, |
| <a href="function/Function1.html" title="interface in org.apache.calcite.linq4j.function">Function1</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TKey</a>> innerKeySelector, |
| <a href="function/Function2.html" title="interface in org.apache.calcite.linq4j.function">Function2</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TResult</a>> resultSelector)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <section role="region"> |
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| <li class="blockList"><a id="method.summary"> |
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| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary"> |
| <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="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>private boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#advance()">advance</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Moves to the next key that is present in both sides.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#close()">close</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Closes this enumerable and releases resources.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TResult</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#current()">current</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Gets the current element in the collection.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#moveNext()">moveNext</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Advances the enumerator to the next element of the collection.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reset()">reset</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Sets the enumerator to its initial position, which is before the first |
| element in the collection.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#start()">start</a></span>()</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </table> |
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| <li class="blockList"><a id="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
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| </a> |
| <h3>Field Detail</h3> |
| <a id="lefts"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>lefts</h4> |
| <pre>final java.util.List<<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>> lefts</pre> |
| </li> |
| </ul> |
| <a id="rights"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>rights</h4> |
| <pre>final java.util.List<<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>> rights</pre> |
| </li> |
| </ul> |
| <a id="leftEnumerator"> |
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| </a> |
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| <h4>leftEnumerator</h4> |
| <pre>private final <a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>> leftEnumerator</pre> |
| </li> |
| </ul> |
| <a id="rightEnumerator"> |
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| </a> |
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| <h4>rightEnumerator</h4> |
| <pre>private final <a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>> rightEnumerator</pre> |
| </li> |
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| <h4>outerKeySelector</h4> |
| <pre>private final <a href="function/Function1.html" title="interface in org.apache.calcite.linq4j.function">Function1</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TKey</a> extends java.lang.Comparable<<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TKey</a>>> outerKeySelector</pre> |
| </li> |
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| </a> |
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| <h4>innerKeySelector</h4> |
| <pre>private final <a href="function/Function1.html" title="interface in org.apache.calcite.linq4j.function">Function1</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TKey</a> extends java.lang.Comparable<<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TKey</a>>> innerKeySelector</pre> |
| </li> |
| </ul> |
| <a id="resultSelector"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>resultSelector</h4> |
| <pre>private final <a href="function/Function2.html" title="interface in org.apache.calcite.linq4j.function">Function2</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TResult</a>> resultSelector</pre> |
| </li> |
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| <a id="done"> |
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| <h4>done</h4> |
| <pre>boolean done</pre> |
| </li> |
| </ul> |
| <a id="cartesians"> |
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| </a> |
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| <h4>cartesians</h4> |
| <pre><a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><java.util.List<java.lang.Object>> cartesians</pre> |
| </li> |
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| </ul> |
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| </a> |
| <h3>Constructor Detail</h3> |
| <a id="<init>(org.apache.calcite.linq4j.Enumerator,org.apache.calcite.linq4j.Enumerator,org.apache.calcite.linq4j.function.Function1,org.apache.calcite.linq4j.function.Function1,org.apache.calcite.linq4j.function.Function2)"> |
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| <h4>MergeJoinEnumerator</h4> |
| <pre>MergeJoinEnumerator​(<a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>> leftEnumerator, |
| <a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>> rightEnumerator, |
| <a href="function/Function1.html" title="interface in org.apache.calcite.linq4j.function">Function1</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TKey</a>> outerKeySelector, |
| <a href="function/Function1.html" title="interface in org.apache.calcite.linq4j.function">Function1</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TKey</a>> innerKeySelector, |
| <a href="function/Function2.html" title="interface in org.apache.calcite.linq4j.function">Function2</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TSource</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TInner</a>,​<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TResult</a>> resultSelector)</pre> |
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| <h3>Method Detail</h3> |
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| <h4>start</h4> |
| <pre class="methodSignature">private void start()</pre> |
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| <h4>advance</h4> |
| <pre class="methodSignature">private boolean advance()</pre> |
| <div class="block">Moves to the next key that is present in both sides. Populates |
| lefts and rights with the rows. Restarts the cross-join |
| enumerator.</div> |
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| <h4>current</h4> |
| <pre class="methodSignature">public <a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TResult</a> current()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="Enumerator.html#current()">Enumerator</a></code></span></div> |
| <div class="block">Gets the current element in the collection. |
| |
| <p>After an enumerator is created or after the <a href="Enumerator.html#reset()"><code>Enumerator.reset()</code></a> method is |
| called, the <a href="Enumerator.html#moveNext()"><code>Enumerator.moveNext()</code></a> method must be called to advance the |
| enumerator to the first element of the collection before reading the |
| value of the <code>current</code> property; otherwise, <code>current</code> is |
| undefined. |
| |
| <p>This method also throws <code>NoSuchElementException</code> if |
| the last call to <code>moveNext</code> returned <code>false</code>, which indicates |
| the end of the collection. |
| |
| <p>This method does not move the position of the enumerator, and |
| consecutive calls to <code>current</code> return the same object until either |
| <code>moveNext</code> or <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 <code>reset</code> may, |
| at the discretion of the implementation, throw a |
| <code>ConcurrentModificationException</code>. If the collection is |
| modified between <code>moveNext</code> and <code>current</code>, <code>current</code> |
| returns the element that it is set to, even if the enumerator is already |
| invalidated.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="Enumerator.html#current()">current</a></code> in interface <code><a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TResult</a>></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Current element</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="moveNext()"> |
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| <h4>moveNext</h4> |
| <pre class="methodSignature">public boolean moveNext()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="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="Enumerator.html#reset()"><code>Enumerator.reset()</code></a> may, |
| at the discretion of the implementation, throw a |
| <code>ConcurrentModificationException</code>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="Enumerator.html#moveNext()">moveNext</a></code> in interface <code><a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TResult</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> |
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| <h4>reset</h4> |
| <pre class="methodSignature">public void reset()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="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="Enumerator.html#moveNext()"><code>Enumerator.moveNext()</code></a> or <code>reset</code> may, |
| at the discretion of the implementation, throw a |
| <code>ConcurrentModificationException</code>. |
| |
| <p>This method is optional; it may throw |
| <code>UnsupportedOperationException</code>. |
| |
| <h3>Notes to Implementers</h3> |
| |
| <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="Enumerator.html#moveNext()"><code>Enumerator.moveNext()</code></a> and |
| <a href="Enumerator.html#current()"><code>Enumerator.current()</code></a>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="Enumerator.html#reset()">reset</a></code> in interface <code><a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TResult</a>></code></dd> |
| </dl> |
| </li> |
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| <h4>close</h4> |
| <pre class="methodSignature">public void close()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="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>close</code> in interface <code>java.lang.AutoCloseable</code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="Enumerator.html#close()">close</a></code> in interface <code><a href="Enumerator.html" title="interface in org.apache.calcite.linq4j">Enumerator</a><<a href="EnumerableDefaults.MergeJoinEnumerator.html" title="type parameter in EnumerableDefaults.MergeJoinEnumerator">TResult</a>></code></dd> |
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