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| <h2 title="Class LeveldbIterator" class="title">Class LeveldbIterator</h2> |
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| <ul class="inheritance"> |
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| <li>org.apache.hadoop.yarn.server.utils.LeveldbIterator</li> |
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| <br> |
| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public class <span class="typeNameLabel">LeveldbIterator</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="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]>>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></pre> |
| <div class="block">A wrapper for a DBIterator to translate the raw RuntimeExceptions that |
| can be thrown into DBExceptions.</div> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#LeveldbIterator-org.iq80.leveldb.DB-">LeveldbIterator</a></span>(org.iq80.leveldb.DB db)</code> |
| <div class="block">Create an iterator for the specified database</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#LeveldbIterator-org.iq80.leveldb.DBIterator-">LeveldbIterator</a></span>(org.iq80.leveldb.DBIterator iter)</code> |
| <div class="block">Create an iterator using the specified underlying DBIterator</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#LeveldbIterator-org.iq80.leveldb.DB-org.iq80.leveldb.ReadOptions-">LeveldbIterator</a></span>(org.iq80.leveldb.DB db, |
| org.iq80.leveldb.ReadOptions options)</code> |
| <div class="block">Create an iterator for the specified database</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
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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/hadoop/yarn/server/utils/LeveldbIterator.html#close--">close</a></span>()</code> |
| <div class="block">Closes the iterator.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#hasNext--">hasNext</a></span>()</code> |
| <div class="block">Returns <tt>true</tt> if the iteration has more elements.</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/hadoop/yarn/server/utils/LeveldbIterator.html#hasPrev--">hasPrev</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#next--">next</a></span>()</code> |
| <div class="block">Returns the next element in the iteration.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#peekNext--">peekNext</a></span>()</code> |
| <div class="block">Returns the next element in the iteration, without advancing the |
| iteration.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#peekPrev--">peekPrev</a></span>()</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#prev--">prev</a></span>()</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#remove--">remove</a></span>()</code> |
| <div class="block">Removes from the database the last element returned by the iterator.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#seek-byte:A-">seek</a></span>(byte[] key)</code> |
| <div class="block">Repositions the iterator so the key of the next BlockElement |
| returned greater than or equal to the specified targetKey.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#seekToFirst--">seekToFirst</a></span>()</code> |
| <div class="block">Repositions the iterator so is is at the beginning of the Database.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/utils/LeveldbIterator.html#seekToLast--">seekToLast</a></span>()</code> |
| <div class="block">Repositions the iterator so it is at the end of of the Database.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
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| <!-- --> |
| </a> |
| <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> |
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| <h3>Methods inherited from interface java.util.<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true#forEachRemaining-java.util.function.Consumer-" title="class or interface in java.util">forEachRemaining</a></code></li> |
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| </ul> |
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| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| </a> |
| <h3>Constructor Detail</h3> |
| <a name="LeveldbIterator-org.iq80.leveldb.DB-"> |
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| </a> |
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| <li class="blockList"> |
| <h4>LeveldbIterator</h4> |
| <pre>public LeveldbIterator(org.iq80.leveldb.DB db)</pre> |
| <div class="block">Create an iterator for the specified database</div> |
| </li> |
| </ul> |
| <a name="LeveldbIterator-org.iq80.leveldb.DB-org.iq80.leveldb.ReadOptions-"> |
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| </a> |
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| <h4>LeveldbIterator</h4> |
| <pre>public LeveldbIterator(org.iq80.leveldb.DB db, |
| org.iq80.leveldb.ReadOptions options)</pre> |
| <div class="block">Create an iterator for the specified database</div> |
| </li> |
| </ul> |
| <a name="LeveldbIterator-org.iq80.leveldb.DBIterator-"> |
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| </a> |
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| <h4>LeveldbIterator</h4> |
| <pre>public LeveldbIterator(org.iq80.leveldb.DBIterator iter)</pre> |
| <div class="block">Create an iterator using the specified underlying DBIterator</div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
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| <ul class="blockList"> |
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| <h4>seek</h4> |
| <pre>public void seek(byte[] key) |
| throws org.iq80.leveldb.DBException</pre> |
| <div class="block">Repositions the iterator so the key of the next BlockElement |
| returned greater than or equal to the specified targetKey.</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.iq80.leveldb.DBException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="seekToFirst--"> |
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| <h4>seekToFirst</h4> |
| <pre>public void seekToFirst() |
| throws org.iq80.leveldb.DBException</pre> |
| <div class="block">Repositions the iterator so is is at the beginning of the Database.</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.iq80.leveldb.DBException</code></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>seekToLast</h4> |
| <pre>public void seekToLast() |
| throws org.iq80.leveldb.DBException</pre> |
| <div class="block">Repositions the iterator so it is at the end of of the Database.</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.iq80.leveldb.DBException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="hasNext--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>hasNext</h4> |
| <pre>public boolean hasNext() |
| throws org.iq80.leveldb.DBException</pre> |
| <div class="block">Returns <tt>true</tt> if the iteration has more elements.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true#hasNext--" title="class or interface in java.util">hasNext</a></code> in interface <code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]>></code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.iq80.leveldb.DBException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="next--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>next</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]> next() |
| throws org.iq80.leveldb.DBException</pre> |
| <div class="block">Returns the next element in the iteration.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true#next--" title="class or interface in java.util">next</a></code> in interface <code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]>></code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.iq80.leveldb.DBException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="peekNext--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>peekNext</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]> peekNext() |
| throws org.iq80.leveldb.DBException</pre> |
| <div class="block">Returns the next element in the iteration, without advancing the |
| iteration.</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.iq80.leveldb.DBException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="hasPrev--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>hasPrev</h4> |
| <pre>public boolean hasPrev() |
| throws org.iq80.leveldb.DBException</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if there is a previous entry in the iteration.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.iq80.leveldb.DBException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="prev--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>prev</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]> prev() |
| throws org.iq80.leveldb.DBException</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the previous element in the iteration and rewinds the iteration.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.iq80.leveldb.DBException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="peekPrev--"> |
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| <h4>peekPrev</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]> peekPrev() |
| throws org.iq80.leveldb.DBException</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the previous element in the iteration, without rewinding the |
| iteration.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.iq80.leveldb.DBException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="remove--"> |
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| <h4>remove</h4> |
| <pre>public void remove() |
| throws org.iq80.leveldb.DBException</pre> |
| <div class="block">Removes from the database the last element returned by the iterator.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true#remove--" title="class or interface in java.util">remove</a></code> in interface <code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a><byte[],byte[]>></code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>org.iq80.leveldb.DBException</code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="close--"> |
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| <h4>close</h4> |
| <pre>public void close() |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Closes the iterator.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true#close--" title="class or interface in java.io">close</a></code> in interface <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></code></dd> |
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| <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="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
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