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<title>Xapian: API Documentation: xapian-core: Xapian::NumberValueRangeProcessor Class Reference</title>
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<div class="navpath"><a class="el" href="namespaceXapian.html">Xapian</a>::<a class="el" href="classXapian_1_1NumberValueRangeProcessor.html">NumberValueRangeProcessor</a>
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<h1>Xapian::NumberValueRangeProcessor Class Reference</h1><!-- doxytag: class="Xapian::NumberValueRangeProcessor" --><!-- doxytag: inherits="Xapian::StringValueRangeProcessor" -->Handle a number range.
<a href="#_details">More...</a>
<p>
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Inheritance diagram for Xapian::NumberValueRangeProcessor:</div>
<div class="dynsection">
<p><center><img src="classXapian_1_1NumberValueRangeProcessor__inherit__graph.png" border="0" usemap="#Xapian_1_1NumberValueRangeProcessor__inherit__map" alt="Inheritance graph"></center>
<map name="Xapian_1_1NumberValueRangeProcessor__inherit__map">
<area shape="rect" href="classXapian_1_1StringValueRangeProcessor.html" title="Handle a string range." alt="" coords="12,84,260,111"><area shape="rect" href="structXapian_1_1ValueRangeProcessor.html" title="Base class for value range processors." alt="" coords="31,7,241,33"></map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center></div>
<p>
<a href="classXapian_1_1NumberValueRangeProcessor-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classXapian_1_1NumberValueRangeProcessor.html#ca8725af59b1c7711aaf48d1f2f3add7">NumberValueRangeProcessor</a> (<a class="el" href="namespaceXapian.html#94a899651fa920c72ffa9635bde630ea">Xapian::valueno</a> slot_)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Constructor. <a href="#ca8725af59b1c7711aaf48d1f2f3add7"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classXapian_1_1NumberValueRangeProcessor.html#93b0a5e26ad49f7d4ab0b04c50a46ec6">NumberValueRangeProcessor</a> (<a class="el" href="namespaceXapian.html#94a899651fa920c72ffa9635bde630ea">Xapian::valueno</a> slot_, const std::string &str_, bool prefix_=true)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Constructor. <a href="#93b0a5e26ad49f7d4ab0b04c50a46ec6"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="namespaceXapian.html#94a899651fa920c72ffa9635bde630ea">Xapian::valueno</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classXapian_1_1NumberValueRangeProcessor.html#4a0951e57a4ea8fcdcd9bec6a8037514">operator()</a> (std::string &begin, std::string &end)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check for a valid numeric range. <a href="#4a0951e57a4ea8fcdcd9bec6a8037514"></a><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Handle a number range.
<p>
This class must be used on values which have been encoded using <a class="el" href="namespaceXapian.html#29a741b4cda98e10ed5f2fc784039065" title="Convert a floating point number to a string, preserving sort order.">Xapian::sortable_serialise()</a> which turns numbers into strings which will sort in the same order as the numbers (the same values can be used to implement a numeric sort). <hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="ca8725af59b1c7711aaf48d1f2f3add7"></a><!-- doxytag: member="Xapian::NumberValueRangeProcessor::NumberValueRangeProcessor" ref="ca8725af59b1c7711aaf48d1f2f3add7" args="(Xapian::valueno slot_)" -->
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<td class="memname">Xapian::NumberValueRangeProcessor::NumberValueRangeProcessor </td>
<td>(</td>
<td class="paramtype"><a class="el" href="namespaceXapian.html#94a899651fa920c72ffa9635bde630ea">Xapian::valueno</a> </td>
<td class="paramname"> <em>slot_</em> </td>
<td> ) </td>
<td><code> [inline]</code></td>
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<p>
Constructor.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>slot_</em> </td><td>The value number to return from operator(). </td></tr>
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</dl>
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<a class="anchor" name="93b0a5e26ad49f7d4ab0b04c50a46ec6"></a><!-- doxytag: member="Xapian::NumberValueRangeProcessor::NumberValueRangeProcessor" ref="93b0a5e26ad49f7d4ab0b04c50a46ec6" args="(Xapian::valueno slot_, const std::string &str_, bool prefix_=true)" -->
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<td class="memname">Xapian::NumberValueRangeProcessor::NumberValueRangeProcessor </td>
<td>(</td>
<td class="paramtype"><a class="el" href="namespaceXapian.html#94a899651fa920c72ffa9635bde630ea">Xapian::valueno</a> </td>
<td class="paramname"> <em>slot_</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const std::string & </td>
<td class="paramname"> <em>str_</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"> <em>prefix_</em> = <code>true</code></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td><code> [inline]</code></td>
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<p>
Constructor.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>slot_</em> </td><td>The value number to return from operator().</td></tr>
<tr><td valign="top"></td><td valign="top"><em>str_</em> </td><td>A string to look for to recognise values as belonging to this numeric range.</td></tr>
<tr><td valign="top"></td><td valign="top"><em>prefix_</em> </td><td>Whether to look for the string at the start or end of the values. If true, the string is a prefix; if false, the string is a suffix (default: true).</td></tr>
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The string supplied in str_ is used by <em>operator()</em> to decide whether the pair of strings supplied to it constitute a valid range. If prefix_ is true, the first value in a range must begin with str_ (and the second value may optionally begin with str_); if prefix_ is false, the second value in a range must end with str_ (and the first value may optionally end with str_).<p>
If str_ is empty, the setting of prefix_ is irrelevant, and no special strings are required at the start or end of the strings defining the range.<p>
The remainder of both strings defining the endpoints must be valid floating point numbers. (FIXME: define format recognised).<p>
For example, if str_ is "$" and prefix_ is true, and the range processor has been added to the queryparser, the queryparser will accept "$10..50" or "$10..$50", but not "10..50" or "10..$50" as valid ranges. If str_ is "kg" and prefix_ is false, the queryparser will accept "10..50kg" or "10kg..50kg", but not "10..50" or "10kg..50" as valid ranges.
</div>
</div><p>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="4a0951e57a4ea8fcdcd9bec6a8037514"></a><!-- doxytag: member="Xapian::NumberValueRangeProcessor::operator()" ref="4a0951e57a4ea8fcdcd9bec6a8037514" args="(std::string &begin, std::string &end)" -->
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<td class="memname"><a class="el" href="namespaceXapian.html#94a899651fa920c72ffa9635bde630ea">Xapian::valueno</a> Xapian::NumberValueRangeProcessor::operator() </td>
<td>(</td>
<td class="paramtype">std::string & </td>
<td class="paramname"> <em>begin</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">std::string & </td>
<td class="paramname"> <em>end</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td><code> [virtual]</code></td>
</tr>
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<div class="memdoc">
<p>
Check for a valid numeric range.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[in,out]</tt> </td><td valign="top"><em>begin</em> </td><td>The start of the range as specified in the query string by the user. This parameter is a non-const reference so the <a class="el" href="structXapian_1_1ValueRangeProcessor.html" title="Base class for value range processors.">ValueRangeProcessor</a> can modify it to return the value to start the range with. </td></tr>
<tr><td valign="top"><tt>[in,out]</tt> </td><td valign="top"><em>end</em> </td><td>The end of the range. This is also a non-const reference so it can be modified.</td></tr>
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</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>If BEGIN..END is a valid numeric range with the specified prefix/suffix (if one was specified), this method modifies them by removing the prefix/suffix, converting to a number, and encoding with <a class="el" href="namespaceXapian.html#29a741b4cda98e10ed5f2fc784039065" title="Convert a floating point number to a string, preserving sort order.">Xapian::sortable_serialise()</a>, and returns the value of slot_ passed at construction time. Otherwise it returns <a class="el" href="namespaceXapian.html#0a75ef120e641c77f703e60f595ffda2" title="Reserved value to indicate "no valueno".">Xapian::BAD_VALUENO</a>. </dd></dl>
<p>Reimplemented from <a class="el" href="classXapian_1_1StringValueRangeProcessor.html#ac2cd6bf4645a3bb242cf5ad5022ae5e">Xapian::StringValueRangeProcessor</a>.</p>
</div>
</div><p>
<hr>The documentation for this class was generated from the following file:<ul>
<li>xapian/<a class="el" href="queryparser_8h.html">queryparser.h</a></ul>
</div>
<hr>
<address><small>
Documentation for Xapian (version 1.2.12).<br>
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<a href="http://www.doxygen.org/">Doxygen 1.5.9</a>.
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