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org.apache.lucene.search.spans</FONT>
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Interface Spans</H2>
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<DT>public interface <B>Spans</B></DL>
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Expert: an enumeration of span matches. Used to implement span searching. Each span represents a range of term positions within a document. Matches are enumerated in order, by increasing document number, within that by increasing start position and finally by increasing end position.
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/lucene/search/spans/Spans.html#doc()">doc</A></B>()</CODE>
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Returns the document number of the current match.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/lucene/search/spans/Spans.html#end()">end</A></B>()</CODE>
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Returns the end position of the current match.</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/lucene/search/spans/Spans.html#next()">next</A></B>()</CODE>
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Move to the next match, returning true iff any such exists.</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/lucene/search/spans/Spans.html#skipTo(int)">skipTo</A></B>(int target)</CODE>
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Skips to the first match beyond the current, whose document number is greater than or equal to <i>target</i>.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/lucene/search/spans/Spans.html#start()">start</A></B>()</CODE>
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Returns the start position of the current match.</TD>
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<A NAME="next()"><!-- --></A><H3>
next</H3>
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public boolean <B>next</B>() throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
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<DD>Move to the next match, returning true iff any such exists.
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<DT><B>Throws:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
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skipTo</H3>
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public boolean <B>skipTo</B>(int target) throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
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<DD>Skips to the first match beyond the current, whose document number is greater than or equal to <i>target</i>. <p>Returns true iff there is such a match. <p>Behaves as if written: <pre> boolean skipTo(int target) { do { if (!next()) return false; } while (target > doc()); return true; } </pre> Most implementations are considerably more efficient than that.
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doc</H3>
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public int <B>doc</B>()</PRE>
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<DD>Returns the document number of the current match. Initially invalid.
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start</H3>
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public int <B>start</B>()</PRE>
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<DD>Returns the start position of the current match. Initially invalid.
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<A NAME="end()"><!-- --></A><H3>
end</H3>
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public int <B>end</B>()</PRE>
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<DD>Returns the end position of the current match. Initially invalid.
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