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QueryFilter (apache-cassandra API)
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org.apache.cassandra.db.filter</FONT>
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Class QueryFilter</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.cassandra.db.filter.QueryFilter</B>
</PRE>
<DL>
<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../../org/apache/cassandra/db/filter/NamesQueryFilter.html" title="class in org.apache.cassandra.db.filter">NamesQueryFilter</A>, <A HREF="../../../../../org/apache/cassandra/db/filter/SliceQueryFilter.html" title="class in org.apache.cassandra.db.filter">SliceQueryFilter</A></DD>
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<DT><PRE>public abstract class <B>QueryFilter</B><DT>extends java.lang.Object</DL>
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<!-- =========== FIELD SUMMARY =========== -->
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<B>Field Summary</B></FONT></TH>
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<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#key">key</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../../org/apache/cassandra/db/filter/QueryPath.html" title="class in org.apache.cassandra.db.filter">QueryPath</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#path">path</A></B></CODE>
<BR>
</TD>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<CODE>protected </CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#QueryFilter(java.lang.String, org.apache.cassandra.db.filter.QueryPath)">QueryFilter</A></B>(java.lang.String key,
<A HREF="../../../../../org/apache/cassandra/db/filter/QueryPath.html" title="class in org.apache.cassandra.db.filter">QueryPath</A> path)</CODE>
<BR>
</TD>
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<B>Method Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#collectCollatedColumns(org.apache.cassandra.db.ColumnFamily, java.util.Iterator, int)">collectCollatedColumns</A></B>(<A HREF="../../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</A> returnCF,
java.util.Iterator<<A HREF="../../../../../org/apache/cassandra/db/IColumn.html" title="interface in org.apache.cassandra.db">IColumn</A>> collatedColumns,
int gcBefore)</CODE>
<BR>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>abstract void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#collectReducedColumns(org.apache.cassandra.db.IColumnContainer, java.util.Iterator, int)">collectReducedColumns</A></B>(<A HREF="../../../../../org/apache/cassandra/db/IColumnContainer.html" title="interface in org.apache.cassandra.db">IColumnContainer</A> container,
java.util.Iterator<<A HREF="../../../../../org/apache/cassandra/db/IColumn.html" title="interface in org.apache.cassandra.db">IColumn</A>> reducedColumns,
int gcBefore)</CODE>
<BR>
collects columns from reducedColumns into returnCF.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>abstract <A HREF="../../../../../org/apache/cassandra/db/SuperColumn.html" title="class in org.apache.cassandra.db">SuperColumn</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#filterSuperColumn(org.apache.cassandra.db.SuperColumn, int)">filterSuperColumn</A></B>(<A HREF="../../../../../org/apache/cassandra/db/SuperColumn.html" title="class in org.apache.cassandra.db">SuperColumn</A> superColumn,
int gcBefore)</CODE>
<BR>
subcolumns of a supercolumn are unindexed, so to pick out parts of those we operate in-memory.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.util.Comparator<<A HREF="../../../../../org/apache/cassandra/db/IColumn.html" title="interface in org.apache.cassandra.db">IColumn</A>></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#getColumnComparator(org.apache.cassandra.db.marshal.AbstractType)">getColumnComparator</A></B>(<A HREF="../../../../../org/apache/cassandra/db/marshal/AbstractType.html" title="class in org.apache.cassandra.db.marshal">AbstractType</A> comparator)</CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#getColumnFamilyName()">getColumnFamilyName</A></B>()</CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../../org/apache/cassandra/db/filter/ColumnIterator.html" title="interface in org.apache.cassandra.db.filter">ColumnIterator</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#getMemColumnIterator(org.apache.cassandra.db.Memtable, org.apache.cassandra.db.marshal.AbstractType)">getMemColumnIterator</A></B>(<A HREF="../../../../../org/apache/cassandra/db/Memtable.html" title="class in org.apache.cassandra.db">Memtable</A> memtable,
<A HREF="../../../../../org/apache/cassandra/db/marshal/AbstractType.html" title="class in org.apache.cassandra.db.marshal">AbstractType</A> comparator)</CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>abstract <A HREF="../../../../../org/apache/cassandra/db/filter/ColumnIterator.html" title="interface in org.apache.cassandra.db.filter">ColumnIterator</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#getMemColumnIterator(org.apache.cassandra.db.Memtable, org.apache.cassandra.db.ColumnFamily, org.apache.cassandra.db.marshal.AbstractType)">getMemColumnIterator</A></B>(<A HREF="../../../../../org/apache/cassandra/db/Memtable.html" title="class in org.apache.cassandra.db">Memtable</A> memtable,
<A HREF="../../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</A> cf,
<A HREF="../../../../../org/apache/cassandra/db/marshal/AbstractType.html" title="class in org.apache.cassandra.db.marshal">AbstractType</A> comparator)</CODE>
<BR>
returns an iterator that returns columns from the given memtable
matching the Filter criteria in sorted order.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>abstract <A HREF="../../../../../org/apache/cassandra/db/filter/ColumnIterator.html" title="interface in org.apache.cassandra.db.filter">ColumnIterator</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#getSSTableColumnIterator(org.apache.cassandra.io.SSTableReader)">getSSTableColumnIterator</A></B>(<A HREF="../../../../../org/apache/cassandra/io/SSTableReader.html" title="class in org.apache.cassandra.io">SSTableReader</A> sstable)</CODE>
<BR>
returns an iterator that returns columns from the given SSTable
matching the Filter criteria in sorted order.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/cassandra/db/filter/QueryFilter.html#isRelevant(org.apache.cassandra.db.IColumn, org.apache.cassandra.db.IColumnContainer, int)">isRelevant</A></B>(<A HREF="../../../../../org/apache/cassandra/db/IColumn.html" title="interface in org.apache.cassandra.db">IColumn</A> column,
<A HREF="../../../../../org/apache/cassandra/db/IColumnContainer.html" title="interface in org.apache.cassandra.db">IColumnContainer</A> container,
int gcBefore)</CODE>
<BR>
</TD>
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<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
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<P>
<!-- ============ FIELD DETAIL =========== -->
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<A NAME="key"><!-- --></A><H3>
key</H3>
<PRE>
public final java.lang.String <B>key</B></PRE>
<DL>
<DL>
</DL>
</DL>
<HR>
<A NAME="path"><!-- --></A><H3>
path</H3>
<PRE>
public final <A HREF="../../../../../org/apache/cassandra/db/filter/QueryPath.html" title="class in org.apache.cassandra.db.filter">QueryPath</A> <B>path</B></PRE>
<DL>
<DL>
</DL>
</DL>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<A NAME="QueryFilter(java.lang.String, org.apache.cassandra.db.filter.QueryPath)"><!-- --></A><H3>
QueryFilter</H3>
<PRE>
protected <B>QueryFilter</B>(java.lang.String key,
<A HREF="../../../../../org/apache/cassandra/db/filter/QueryPath.html" title="class in org.apache.cassandra.db.filter">QueryPath</A> path)</PRE>
<DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
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<A NAME="getMemColumnIterator(org.apache.cassandra.db.Memtable, org.apache.cassandra.db.ColumnFamily, org.apache.cassandra.db.marshal.AbstractType)"><!-- --></A><H3>
getMemColumnIterator</H3>
<PRE>
public abstract <A HREF="../../../../../org/apache/cassandra/db/filter/ColumnIterator.html" title="interface in org.apache.cassandra.db.filter">ColumnIterator</A> <B>getMemColumnIterator</B>(<A HREF="../../../../../org/apache/cassandra/db/Memtable.html" title="class in org.apache.cassandra.db">Memtable</A> memtable,
<A HREF="../../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</A> cf,
<A HREF="../../../../../org/apache/cassandra/db/marshal/AbstractType.html" title="class in org.apache.cassandra.db.marshal">AbstractType</A> comparator)</PRE>
<DL>
<DD>returns an iterator that returns columns from the given memtable
matching the Filter criteria in sorted order.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getMemColumnIterator(org.apache.cassandra.db.Memtable, org.apache.cassandra.db.marshal.AbstractType)"><!-- --></A><H3>
getMemColumnIterator</H3>
<PRE>
public <A HREF="../../../../../org/apache/cassandra/db/filter/ColumnIterator.html" title="interface in org.apache.cassandra.db.filter">ColumnIterator</A> <B>getMemColumnIterator</B>(<A HREF="../../../../../org/apache/cassandra/db/Memtable.html" title="class in org.apache.cassandra.db">Memtable</A> memtable,
<A HREF="../../../../../org/apache/cassandra/db/marshal/AbstractType.html" title="class in org.apache.cassandra.db.marshal">AbstractType</A> comparator)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getSSTableColumnIterator(org.apache.cassandra.io.SSTableReader)"><!-- --></A><H3>
getSSTableColumnIterator</H3>
<PRE>
public abstract <A HREF="../../../../../org/apache/cassandra/db/filter/ColumnIterator.html" title="interface in org.apache.cassandra.db.filter">ColumnIterator</A> <B>getSSTableColumnIterator</B>(<A HREF="../../../../../org/apache/cassandra/io/SSTableReader.html" title="class in org.apache.cassandra.io">SSTableReader</A> sstable)
throws java.io.IOException</PRE>
<DL>
<DD>returns an iterator that returns columns from the given SSTable
matching the Filter criteria in sorted order.
<P>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE></DL>
</DD>
</DL>
<HR>
<A NAME="collectReducedColumns(org.apache.cassandra.db.IColumnContainer, java.util.Iterator, int)"><!-- --></A><H3>
collectReducedColumns</H3>
<PRE>
public abstract void <B>collectReducedColumns</B>(<A HREF="../../../../../org/apache/cassandra/db/IColumnContainer.html" title="interface in org.apache.cassandra.db">IColumnContainer</A> container,
java.util.Iterator<<A HREF="../../../../../org/apache/cassandra/db/IColumn.html" title="interface in org.apache.cassandra.db">IColumn</A>> reducedColumns,
int gcBefore)</PRE>
<DL>
<DD>collects columns from reducedColumns into returnCF. Termination is determined
by the filter code, which should have some limit on the number of columns
to avoid running out of memory on large rows.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="filterSuperColumn(org.apache.cassandra.db.SuperColumn, int)"><!-- --></A><H3>
filterSuperColumn</H3>
<PRE>
public abstract <A HREF="../../../../../org/apache/cassandra/db/SuperColumn.html" title="class in org.apache.cassandra.db">SuperColumn</A> <B>filterSuperColumn</B>(<A HREF="../../../../../org/apache/cassandra/db/SuperColumn.html" title="class in org.apache.cassandra.db">SuperColumn</A> superColumn,
int gcBefore)</PRE>
<DL>
<DD>subcolumns of a supercolumn are unindexed, so to pick out parts of those we operate in-memory.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>superColumn</CODE> - may be modified by filtering op.</DL>
</DD>
</DL>
<HR>
<A NAME="getColumnComparator(org.apache.cassandra.db.marshal.AbstractType)"><!-- --></A><H3>
getColumnComparator</H3>
<PRE>
public java.util.Comparator<<A HREF="../../../../../org/apache/cassandra/db/IColumn.html" title="interface in org.apache.cassandra.db">IColumn</A>> <B>getColumnComparator</B>(<A HREF="../../../../../org/apache/cassandra/db/marshal/AbstractType.html" title="class in org.apache.cassandra.db.marshal">AbstractType</A> comparator)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="collectCollatedColumns(org.apache.cassandra.db.ColumnFamily, java.util.Iterator, int)"><!-- --></A><H3>
collectCollatedColumns</H3>
<PRE>
public void <B>collectCollatedColumns</B>(<A HREF="../../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</A> returnCF,
java.util.Iterator<<A HREF="../../../../../org/apache/cassandra/db/IColumn.html" title="interface in org.apache.cassandra.db">IColumn</A>> collatedColumns,
int gcBefore)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getColumnFamilyName()"><!-- --></A><H3>
getColumnFamilyName</H3>
<PRE>
public java.lang.String <B>getColumnFamilyName</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="isRelevant(org.apache.cassandra.db.IColumn, org.apache.cassandra.db.IColumnContainer, int)"><!-- --></A><H3>
isRelevant</H3>
<PRE>
public static boolean <B>isRelevant</B>(<A HREF="../../../../../org/apache/cassandra/db/IColumn.html" title="interface in org.apache.cassandra.db">IColumn</A> column,
<A HREF="../../../../../org/apache/cassandra/db/IColumnContainer.html" title="interface in org.apache.cassandra.db">IColumnContainer</A> container,
int gcBefore)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
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