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<title>&nbsp; Apache Ignite C++: ignite::cache::query::QueryCursor&lt; K, V &gt; Class Template Reference</title>
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<li class="navelem"><a class="el" href="namespaceignite.html">ignite</a></li><li class="navelem"><a class="el" href="namespaceignite_1_1cache.html">cache</a></li><li class="navelem"><a class="el" href="namespaceignite_1_1cache_1_1query.html">query</a></li><li class="navelem"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">QueryCursor</a></li> </ul>
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<div class="header">
<div class="summary">
<a href="#pub-methods">Public Member Functions</a> &#124;
<a href="classignite_1_1cache_1_1query_1_1QueryCursor-members.html">List of all members</a> </div>
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<div class="title">ignite::cache::query::QueryCursor&lt; K, V &gt; Class Template Reference</div> </div>
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<p>Query cursor class template.
<a href="classignite_1_1cache_1_1query_1_1QueryCursor.html#details">More...</a></p>
<p><code>#include &lt;<a class="el" href="query__cursor_8h_source.html">query_cursor.h</a>&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a23f71bdcccc38d2d9f6eeeaa4d635714"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html#a23f71bdcccc38d2d9f6eeeaa4d635714">QueryCursor</a> ()</td></tr>
<tr class="memdesc:a23f71bdcccc38d2d9f6eeeaa4d635714"><td class="mdescLeft">&#160;</td><td class="mdescRight">Default constructor. <a href="#a23f71bdcccc38d2d9f6eeeaa4d635714">More...</a><br /></td></tr>
<tr class="separator:a23f71bdcccc38d2d9f6eeeaa4d635714"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a877e4922adbdfb8fb3d20bcec351ea35"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html#a877e4922adbdfb8fb3d20bcec351ea35">QueryCursor</a> (impl::cache::query::QueryCursorImpl *impl)</td></tr>
<tr class="memdesc:a877e4922adbdfb8fb3d20bcec351ea35"><td class="mdescLeft">&#160;</td><td class="mdescRight">Constructor. <a href="#a877e4922adbdfb8fb3d20bcec351ea35">More...</a><br /></td></tr>
<tr class="separator:a877e4922adbdfb8fb3d20bcec351ea35"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a901f70ae82074313f724edf959b1e515"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html#a901f70ae82074313f724edf959b1e515">HasNext</a> ()</td></tr>
<tr class="memdesc:a901f70ae82074313f724edf959b1e515"><td class="mdescLeft">&#160;</td><td class="mdescRight">Check whether next entry exists. <a href="#a901f70ae82074313f724edf959b1e515">More...</a><br /></td></tr>
<tr class="separator:a901f70ae82074313f724edf959b1e515"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af7a18c4192ee1d87fc2bbf9f09182963"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html#af7a18c4192ee1d87fc2bbf9f09182963">HasNext</a> (<a class="el" href="classignite_1_1IgniteError.html">IgniteError</a> &amp;err)</td></tr>
<tr class="memdesc:af7a18c4192ee1d87fc2bbf9f09182963"><td class="mdescLeft">&#160;</td><td class="mdescRight">Check whether next entry exists. <a href="#af7a18c4192ee1d87fc2bbf9f09182963">More...</a><br /></td></tr>
<tr class="separator:af7a18c4192ee1d87fc2bbf9f09182963"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab4e4f4e30437d379551aa8c652a99adf"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classignite_1_1cache_1_1CacheEntry.html">CacheEntry</a>&lt; K, V &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html#ab4e4f4e30437d379551aa8c652a99adf">GetNext</a> ()</td></tr>
<tr class="memdesc:ab4e4f4e30437d379551aa8c652a99adf"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get next entry. <a href="#ab4e4f4e30437d379551aa8c652a99adf">More...</a><br /></td></tr>
<tr class="separator:ab4e4f4e30437d379551aa8c652a99adf"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aac93dee2ff95426ac8e5573685181589"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classignite_1_1cache_1_1CacheEntry.html">CacheEntry</a>&lt; K, V &gt;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html#aac93dee2ff95426ac8e5573685181589">GetNext</a> (<a class="el" href="classignite_1_1IgniteError.html">IgniteError</a> &amp;err)</td></tr>
<tr class="memdesc:aac93dee2ff95426ac8e5573685181589"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get next entry. <a href="#aac93dee2ff95426ac8e5573685181589">More...</a><br /></td></tr>
<tr class="separator:aac93dee2ff95426ac8e5573685181589"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae9ddd4b5f19be9c465cac942244187ca"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html#ae9ddd4b5f19be9c465cac942244187ca">GetAll</a> (std::vector&lt; <a class="el" href="classignite_1_1cache_1_1CacheEntry.html">CacheEntry</a>&lt; K, V &gt; &gt; &amp;res)</td></tr>
<tr class="memdesc:ae9ddd4b5f19be9c465cac942244187ca"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get all entries. <a href="#ae9ddd4b5f19be9c465cac942244187ca">More...</a><br /></td></tr>
<tr class="separator:ae9ddd4b5f19be9c465cac942244187ca"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:adffa4b2a7034b8ea5307487bf91104b9"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html#adffa4b2a7034b8ea5307487bf91104b9">GetAll</a> (std::vector&lt; <a class="el" href="classignite_1_1cache_1_1CacheEntry.html">CacheEntry</a>&lt; K, V &gt; &gt; &amp;res, <a class="el" href="classignite_1_1IgniteError.html">IgniteError</a> &amp;err)</td></tr>
<tr class="memdesc:adffa4b2a7034b8ea5307487bf91104b9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get all entries. <a href="#adffa4b2a7034b8ea5307487bf91104b9">More...</a><br /></td></tr>
<tr class="separator:adffa4b2a7034b8ea5307487bf91104b9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a094549bf6b153a23315fe82099ff2596"><td class="memTemplParams" colspan="2">template&lt;typename OutIter &gt; </td></tr>
<tr class="memitem:a094549bf6b153a23315fe82099ff2596"><td class="memTemplItemLeft" align="right" valign="top">void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html#a094549bf6b153a23315fe82099ff2596">GetAll</a> (OutIter iter)</td></tr>
<tr class="memdesc:a094549bf6b153a23315fe82099ff2596"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get all entries. <a href="#a094549bf6b153a23315fe82099ff2596">More...</a><br /></td></tr>
<tr class="separator:a094549bf6b153a23315fe82099ff2596"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:addab3ffd899c62ef04392db7de01a7a4"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html#addab3ffd899c62ef04392db7de01a7a4">IsValid</a> () const</td></tr>
<tr class="memdesc:addab3ffd899c62ef04392db7de01a7a4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Check if the instance is valid. <a href="#addab3ffd899c62ef04392db7de01a7a4">More...</a><br /></td></tr>
<tr class="separator:addab3ffd899c62ef04392db7de01a7a4"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;typename K, typename V&gt;<br />
class ignite::cache::query::QueryCursor&lt; K, V &gt;</h3>
<p>Query cursor class template. </p>
<p>Both key and value types should be default-constructable, copy-constructable and assignable. Also BinaryType class template should be specialized for both types.</p>
<p>This class implemented as a reference to an implementation so copying of this class instance will only create another reference to the same underlying object. Underlying object released automatically once all the instances are destructed. </p>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
<a id="a23f71bdcccc38d2d9f6eeeaa4d635714"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a23f71bdcccc38d2d9f6eeeaa4d635714">&#9670;&nbsp;</a></span>QueryCursor() <span class="overload">[1/2]</span></h2>
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<div class="memtemplate">
template&lt;typename K, typename V&gt; </div>
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<td class="memname"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">ignite::cache::query::QueryCursor</a>&lt; K, V &gt;::<a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">QueryCursor</a> </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
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<p>Default constructor. </p>
<p>Constructed instance is not valid and thus can not be used as a cursor. </p>
</div>
</div>
<a id="a877e4922adbdfb8fb3d20bcec351ea35"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a877e4922adbdfb8fb3d20bcec351ea35">&#9670;&nbsp;</a></span>QueryCursor() <span class="overload">[2/2]</span></h2>
<div class="memitem">
<div class="memproto">
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template&lt;typename K, typename V&gt; </div>
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<td class="memname"><a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">ignite::cache::query::QueryCursor</a>&lt; K, V &gt;::<a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">QueryCursor</a> </td>
<td>(</td>
<td class="paramtype">impl::cache::query::QueryCursorImpl *&#160;</td>
<td class="paramname"><em>impl</em></td><td>)</td>
<td></td>
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<p>Constructor. </p>
<p>Internal method. Should not be used by user.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">impl</td><td>Implementation. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<h2 class="groupheader">Member Function Documentation</h2>
<a id="ae9ddd4b5f19be9c465cac942244187ca"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ae9ddd4b5f19be9c465cac942244187ca">&#9670;&nbsp;</a></span>GetAll() <span class="overload">[1/3]</span></h2>
<div class="memitem">
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<div class="memtemplate">
template&lt;typename K, typename V&gt; </div>
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<td class="memname">void <a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">ignite::cache::query::QueryCursor</a>&lt; K, V &gt;::GetAll </td>
<td>(</td>
<td class="paramtype">std::vector&lt; <a class="el" href="classignite_1_1cache_1_1CacheEntry.html">CacheEntry</a>&lt; K, V &gt; &gt; &amp;&#160;</td>
<td class="paramname"><em>res</em></td><td>)</td>
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<p>Get all entries. </p>
<p>This method should only be used on the valid instance.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">res</td><td>Vector where query entries will be stored.</td></tr>
</table>
</dd>
</dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname"><a class="el" href="classignite_1_1IgniteError.html" title="Ignite error information. ">IgniteError</a></td><td>class instance in case of failure. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="adffa4b2a7034b8ea5307487bf91104b9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#adffa4b2a7034b8ea5307487bf91104b9">&#9670;&nbsp;</a></span>GetAll() <span class="overload">[2/3]</span></h2>
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template&lt;typename K, typename V&gt; </div>
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<td class="memname">void <a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">ignite::cache::query::QueryCursor</a>&lt; K, V &gt;::GetAll </td>
<td>(</td>
<td class="paramtype">std::vector&lt; <a class="el" href="classignite_1_1cache_1_1CacheEntry.html">CacheEntry</a>&lt; K, V &gt; &gt; &amp;&#160;</td>
<td class="paramname"><em>res</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classignite_1_1IgniteError.html">IgniteError</a> &amp;&#160;</td>
<td class="paramname"><em>err</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Get all entries. </p>
<p>Properly sets error param in case of failure.</p>
<p>This method should only be used on the valid instance.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">res</td><td>Vector where query entries will be stored. </td></tr>
<tr><td class="paramname">err</td><td>Used to set operation result. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="a094549bf6b153a23315fe82099ff2596"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a094549bf6b153a23315fe82099ff2596">&#9670;&nbsp;</a></span>GetAll() <span class="overload">[3/3]</span></h2>
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template&lt;typename K, typename V&gt; </div>
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<td class="memname">void <a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">ignite::cache::query::QueryCursor</a>&lt; K, V &gt;::GetAll </td>
<td>(</td>
<td class="paramtype">OutIter&#160;</td>
<td class="paramname"><em>iter</em></td><td>)</td>
<td></td>
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<p>Get all entries. </p>
<p>This method should only be used on the valid instance.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">iter</td><td>Output iterator. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="ab4e4f4e30437d379551aa8c652a99adf"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ab4e4f4e30437d379551aa8c652a99adf">&#9670;&nbsp;</a></span>GetNext() <span class="overload">[1/2]</span></h2>
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template&lt;typename K, typename V&gt; </div>
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<td class="memname"><a class="el" href="classignite_1_1cache_1_1CacheEntry.html">CacheEntry</a>&lt;K, V&gt; <a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">ignite::cache::query::QueryCursor</a>&lt; K, V &gt;::GetNext </td>
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<p>Get next entry. </p>
<p>This method should only be used on the valid instance.</p>
<dl class="section return"><dt>Returns</dt><dd>Next entry.</dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname"><a class="el" href="classignite_1_1IgniteError.html" title="Ignite error information. ">IgniteError</a></td><td>class instance in case of failure. </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="aac93dee2ff95426ac8e5573685181589"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aac93dee2ff95426ac8e5573685181589">&#9670;&nbsp;</a></span>GetNext() <span class="overload">[2/2]</span></h2>
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<td class="memname"><a class="el" href="classignite_1_1cache_1_1CacheEntry.html">CacheEntry</a>&lt;K, V&gt; <a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">ignite::cache::query::QueryCursor</a>&lt; K, V &gt;::GetNext </td>
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<p>Get next entry. </p>
<p>Properly sets error param in case of failure.</p>
<p>This method should only be used on the valid instance.</p>
<dl class="params"><dt>Parameters</dt><dd>
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<dl class="section return"><dt>Returns</dt><dd>Next entry on success and default-constructed entry on failure. Default-constructed entry contains default-constructed instances of both key and value types. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a901f70ae82074313f724edf959b1e515">&#9670;&nbsp;</a></span>HasNext() <span class="overload">[1/2]</span></h2>
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<td class="memname">bool <a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">ignite::cache::query::QueryCursor</a>&lt; K, V &gt;::HasNext </td>
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<p>Check whether next entry exists. </p>
<p>This method should only be used on the valid instance.</p>
<dl class="section return"><dt>Returns</dt><dd>True if next entry exists.</dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
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<h2 class="memtitle"><span class="permalink"><a href="#af7a18c4192ee1d87fc2bbf9f09182963">&#9670;&nbsp;</a></span>HasNext() <span class="overload">[2/2]</span></h2>
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<td class="memname">bool <a class="el" href="classignite_1_1cache_1_1query_1_1QueryCursor.html">ignite::cache::query::QueryCursor</a>&lt; K, V &gt;::HasNext </td>
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<p>Check whether next entry exists. </p>
<p>Properly sets error param in case of failure.</p>
<p>This method should only be used on the valid instance.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">err</td><td>Used to set operation result. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>True if next entry exists and operation resulted in success. Returns false on failure. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#addab3ffd899c62ef04392db7de01a7a4">&#9670;&nbsp;</a></span>IsValid()</h2>
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<p>Check if the instance is valid. </p>
<p>Invalid instance can be returned if some of the previous operations have resulted in a failure. For example invalid instance can be returned by not-throwing version of method in case of error. Invalid instances also often can be created using default constructor.</p>
<dl class="section return"><dt>Returns</dt><dd>True if the instance is valid and can be used. </dd></dl>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="query__cursor_8h_source.html">query_cursor.h</a></li>
</ul>
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