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| org.apache.cayenne.access.util</FONT> |
| <BR> |
| Class DistinctResultIterator</H2> |
| <PRE> |
| java.lang.Object |
| <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.cayenne.access.util.DistinctResultIterator</B> |
| </PRE> |
| <DL> |
| <DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A></DD> |
| </DL> |
| <HR> |
| <DL> |
| <DT><PRE>public class <B>DistinctResultIterator</B><DT>extends java.lang.Object<DT>implements <A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A></DL> |
| </PRE> |
| |
| <P> |
| A ResultIterator that does in-memory filtering of rows to return only distinct rows. |
| Distinct comparison is done by comparing ObjectIds created from each row. Internally |
| DistinctResultIterator wraps another ResultIterator that provides the actual rows. The |
| current limitation is that once switched to reading ids instead of rows (i.e. when |
| "nextObjectId()" is called for the first time), it can't be used to read data rows |
| again. This is pretty sensible for most things in Cayenne. |
| <P> |
| |
| <P> |
| <DL> |
| <DT><B>Since:</B></DT> |
| <DD>1.2</DD> |
| <DT><B>Author:</B></DT> |
| <DD>Andrus Adamchik</DD> |
| </DL> |
| <HR> |
| |
| <P> |
| <!-- =========== FIELD SUMMARY =========== --> |
| |
| <A NAME="field_summary"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
| <B>Field Summary</B></FONT></TH> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>protected boolean</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#compareFullRows">compareFullRows</A></B></CODE> |
| |
| <BR> |
| </TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>protected <A HREF="../../../../../org/apache/cayenne/map/DbEntity.html" title="class in org.apache.cayenne.map">DbEntity</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#defaultEntity">defaultEntity</A></B></CODE> |
| |
| <BR> |
| </TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>protected java.util.Set</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#fetchedIds">fetchedIds</A></B></CODE> |
| |
| <BR> |
| </TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>protected java.util.Map</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#nextDataRow">nextDataRow</A></B></CODE> |
| |
| <BR> |
| </TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>protected boolean</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#readingIds">readingIds</A></B></CODE> |
| |
| <BR> |
| </TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>protected <A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#wrappedIterator">wrappedIterator</A></B></CODE> |
| |
| <BR> |
| </TD> |
| </TR> |
| </TABLE> |
| |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| |
| <A NAME="constructor_summary"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
| <B>Constructor Summary</B></FONT></TH> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#DistinctResultIterator(org.apache.cayenne.access.ResultIterator, org.apache.cayenne.map.DbEntity, boolean)">DistinctResultIterator</A></B>(<A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A> wrappedIterator, |
| <A HREF="../../../../../org/apache/cayenne/map/DbEntity.html" title="class in org.apache.cayenne.map">DbEntity</A> defaultEntity, |
| boolean compareFullRows)</CODE> |
| |
| <BR> |
| Creates new DistinctResultIterator wrapping another ResultIterator.</TD> |
| </TR> |
| </TABLE> |
| |
| <!-- ========== METHOD SUMMARY =========== --> |
| |
| <A NAME="method_summary"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
| <B>Method Summary</B></FONT></TH> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> void</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#close()">close</A></B>()</CODE> |
| |
| <BR> |
| CLoses underlying ResultIterator.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> java.util.List</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#dataRows(boolean)">dataRows</A></B>(boolean close)</CODE> |
| |
| <BR> |
| Returns all data rows.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> int</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#getDataRowWidth()">getDataRowWidth</A></B>()</CODE> |
| |
| <BR> |
| Returns the number of columns in the result row.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> boolean</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#hasNextRow()">hasNextRow</A></B>()</CODE> |
| |
| <BR> |
| Returns true if there is at least one more record |
| that can be read from the iterator.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> java.util.Map</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#nextDataRow()">nextDataRow</A></B>()</CODE> |
| |
| <BR> |
| Returns the next result row as a Map.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> java.util.Map</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#nextObjectId(org.apache.cayenne.map.DbEntity)">nextObjectId</A></B>(<A HREF="../../../../../org/apache/cayenne/map/DbEntity.html" title="class in org.apache.cayenne.map">DbEntity</A> entity)</CODE> |
| |
| <BR> |
| Returns a Map for the next ObjectId.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> void</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../../org/apache/cayenne/access/util/DistinctResultIterator.html#skipDataRow()">skipDataRow</A></B>()</CODE> |
| |
| <BR> |
| Skips current data row instead of reading it.</TD> |
| </TR> |
| </TABLE> |
| <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <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> |
| </TABLE> |
| |
| <P> |
| |
| <!-- ============ FIELD DETAIL =========== --> |
| |
| <A NAME="field_detail"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
| <B>Field Detail</B></FONT></TH> |
| </TR> |
| </TABLE> |
| |
| <A NAME="wrappedIterator"><!-- --></A><H3> |
| wrappedIterator</H3> |
| <PRE> |
| protected <A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A> <B>wrappedIterator</B></PRE> |
| <DL> |
| <DL> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="fetchedIds"><!-- --></A><H3> |
| fetchedIds</H3> |
| <PRE> |
| protected java.util.Set <B>fetchedIds</B></PRE> |
| <DL> |
| <DL> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="nextDataRow"><!-- --></A><H3> |
| nextDataRow</H3> |
| <PRE> |
| protected java.util.Map <B>nextDataRow</B></PRE> |
| <DL> |
| <DL> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="defaultEntity"><!-- --></A><H3> |
| defaultEntity</H3> |
| <PRE> |
| protected <A HREF="../../../../../org/apache/cayenne/map/DbEntity.html" title="class in org.apache.cayenne.map">DbEntity</A> <B>defaultEntity</B></PRE> |
| <DL> |
| <DL> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="compareFullRows"><!-- --></A><H3> |
| compareFullRows</H3> |
| <PRE> |
| protected boolean <B>compareFullRows</B></PRE> |
| <DL> |
| <DL> |
| </DL> |
| </DL> |
| <HR> |
| |
| <A NAME="readingIds"><!-- --></A><H3> |
| readingIds</H3> |
| <PRE> |
| protected boolean <B>readingIds</B></PRE> |
| <DL> |
| <DL> |
| </DL> |
| </DL> |
| |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| |
| <A NAME="constructor_detail"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
| <B>Constructor Detail</B></FONT></TH> |
| </TR> |
| </TABLE> |
| |
| <A NAME="DistinctResultIterator(org.apache.cayenne.access.ResultIterator, org.apache.cayenne.map.DbEntity, boolean)"><!-- --></A><H3> |
| DistinctResultIterator</H3> |
| <PRE> |
| public <B>DistinctResultIterator</B>(<A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A> wrappedIterator, |
| <A HREF="../../../../../org/apache/cayenne/map/DbEntity.html" title="class in org.apache.cayenne.map">DbEntity</A> defaultEntity, |
| boolean compareFullRows) |
| throws <A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></PRE> |
| <DL> |
| <DD>Creates new DistinctResultIterator wrapping another ResultIterator. |
| <P> |
| <DL> |
| <DT><B>Parameters:</B><DD><CODE>wrappedIterator</CODE> - <DD><CODE>defaultEntity</CODE> - an entity needed to build ObjectIds for distinct comparison. |
| <DT><B>Throws:</B> |
| <DD><CODE><A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></CODE></DL> |
| </DL> |
| |
| <!-- ============ METHOD DETAIL ========== --> |
| |
| <A NAME="method_detail"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
| <B>Method Detail</B></FONT></TH> |
| </TR> |
| </TABLE> |
| |
| <A NAME="close()"><!-- --></A><H3> |
| close</H3> |
| <PRE> |
| public void <B>close</B>() |
| throws <A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></PRE> |
| <DL> |
| <DD>CLoses underlying ResultIterator. |
| <P> |
| <DD><DL> |
| <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html#close()">close</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A></CODE></DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Throws:</B> |
| <DD><CODE><A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></CODE></DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="dataRows(boolean)"><!-- --></A><H3> |
| dataRows</H3> |
| <PRE> |
| public java.util.List <B>dataRows</B>(boolean close) |
| throws <A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></PRE> |
| <DL> |
| <DD>Returns all data rows. |
| <P> |
| <DD><DL> |
| <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html#dataRows(boolean)">dataRows</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A></CODE></DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Throws:</B> |
| <DD><CODE><A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></CODE></DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="getDataRowWidth()"><!-- --></A><H3> |
| getDataRowWidth</H3> |
| <PRE> |
| public int <B>getDataRowWidth</B>()</PRE> |
| <DL> |
| <DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html#getDataRowWidth()">ResultIterator</A></CODE></B></DD> |
| <DD>Returns the number of columns in the result row. |
| <P> |
| <DD><DL> |
| <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html#getDataRowWidth()">getDataRowWidth</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A></CODE></DL> |
| </DD> |
| <DD><DL> |
| </DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="hasNextRow()"><!-- --></A><H3> |
| hasNextRow</H3> |
| <PRE> |
| public boolean <B>hasNextRow</B>() |
| throws <A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></PRE> |
| <DL> |
| <DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html#hasNextRow()">ResultIterator</A></CODE></B></DD> |
| <DD>Returns true if there is at least one more record |
| that can be read from the iterator. |
| <P> |
| <DD><DL> |
| <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html#hasNextRow()">hasNextRow</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A></CODE></DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Throws:</B> |
| <DD><CODE><A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></CODE></DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="nextDataRow()"><!-- --></A><H3> |
| nextDataRow</H3> |
| <PRE> |
| public java.util.Map <B>nextDataRow</B>() |
| throws <A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></PRE> |
| <DL> |
| <DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html#nextDataRow()">ResultIterator</A></CODE></B></DD> |
| <DD>Returns the next result row as a Map. |
| <P> |
| <DD><DL> |
| <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html#nextDataRow()">nextDataRow</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A></CODE></DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Throws:</B> |
| <DD><CODE><A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></CODE></DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="nextObjectId(org.apache.cayenne.map.DbEntity)"><!-- --></A><H3> |
| nextObjectId</H3> |
| <PRE> |
| public java.util.Map <B>nextObjectId</B>(<A HREF="../../../../../org/apache/cayenne/map/DbEntity.html" title="class in org.apache.cayenne.map">DbEntity</A> entity) |
| throws <A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></PRE> |
| <DL> |
| <DD>Returns a Map for the next ObjectId. After calling this method, calls to |
| "nextDataRow()" will result in exceptions. |
| <P> |
| <DD><DL> |
| <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html#nextObjectId(org.apache.cayenne.map.DbEntity)">nextObjectId</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A></CODE></DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Throws:</B> |
| <DD><CODE><A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></CODE></DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="skipDataRow()"><!-- --></A><H3> |
| skipDataRow</H3> |
| <PRE> |
| public void <B>skipDataRow</B>() |
| throws <A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></PRE> |
| <DL> |
| <DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html#skipDataRow()">ResultIterator</A></CODE></B></DD> |
| <DD>Skips current data row instead of reading it. |
| <P> |
| <DD><DL> |
| <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html#skipDataRow()">skipDataRow</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/cayenne/access/ResultIterator.html" title="interface in org.apache.cayenne.access">ResultIterator</A></CODE></DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Throws:</B> |
| <DD><CODE><A HREF="../../../../../org/apache/cayenne/CayenneException.html" title="class in org.apache.cayenne">CayenneException</A></CODE></DL> |
| </DD> |
| </DL> |
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