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libdb/lang/sql/jdbc/doc/SQLite/Callback.html
Gregory Burd eff277ac23 Release 5.2.28 on 6/10/2011
2011-09-13 13:44:24 -04:00

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Callback (SQLite Java Wrapper)
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<H2>
<FONT SIZE="-1">
SQLite</FONT>
<BR>
Interface Callback</H2>
<DL>
<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../SQLite/TableResult.html" title="class in SQLite">TableResult</A></DD>
</DL>
<HR>
<DL>
<DT>public interface <B>Callback</B></DL>
<P>
Callback interface for SQLite's query results.
<BR><BR>
Example:<BR>
<PRE>
class TableFmt implements SQLite.Callback {
public void columns(String cols[]) {
System.out.println("&lt;TH&gt;&lt;TR&gt;");
for (int i = 0; i &lt; cols.length; i++) {
System.out.println("&lt;TD&gt;" + cols[i] + "&lt;/TD&gt;");
}
System.out.println("&lt;/TR&gt;&lt;/TH&gt;");
}
public boolean newrow(String cols[]) {
System.out.println("&lt;TR&gt;");
for (int i = 0; i &lt; cols.length; i++) {
System.out.println("&lt;TD&gt;" + cols[i] + "&lt;/TD&gt;");
}
System.out.println("&lt;/TR&gt;");
return false;
}
}
...
SQLite.Database db = new SQLite.Database();
db.open("db", 0);
System.out.println("&lt;TABLE&gt;");
db.exec("select * from TEST", new TableFmt());
System.out.println("&lt;/TABLE&gt;");
...
</PRE>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../SQLite/Callback.html#columns(java.lang.String[])">columns</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[]&nbsp;coldata)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Reports column names of the query result.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
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<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../SQLite/Callback.html#newrow(java.lang.String[])">newrow</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[]&nbsp;rowdata)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Reports row data of the query result.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../SQLite/Callback.html#types(java.lang.String[])">types</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[]&nbsp;types)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Reports type names of the columns of the query result.</TD>
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<A NAME="columns(java.lang.String[])"><!-- --></A><H3>
columns</H3>
<PRE>
public void <B>columns</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[]&nbsp;coldata)</PRE>
<DL>
<DD>Reports column names of the query result.
This method is invoked first (and once) when
the SQLite engine returns the result set.<BR><BR>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>coldata</CODE> - string array holding the column names</DL>
</DD>
</DL>
<HR>
<A NAME="newrow(java.lang.String[])"><!-- --></A><H3>
newrow</H3>
<PRE>
public boolean <B>newrow</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[]&nbsp;rowdata)</PRE>
<DL>
<DD>Reports row data of the query result.
This method is invoked for each row of the
result set. If true is returned the running
SQLite query is aborted.<BR><BR>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>rowdata</CODE> - string array holding the column values of the row</DL>
</DD>
</DL>
<HR>
<A NAME="types(java.lang.String[])"><!-- --></A><H3>
types</H3>
<PRE>
public void <B>types</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>[]&nbsp;types)</PRE>
<DL>
<DD>Reports type names of the columns of the query result.
This is available from SQLite 2.6.0 on and needs
the PRAGMA show_datatypes to be turned on.<BR><BR>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>types</CODE> - string array holding column types</DL>
</DD>
</DL>
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<small>Contact: <a HREF="mailto:chw@ch-werner.de">Christian Werner</a></small>
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