dbconstraint.html

Medi 这是一个基于Java的媒体文件归档器工具

public int <B>getSonFatherIndex</B>(int&nbsp;index)
                      throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Returns in which position a son table references THIS table in its constraint.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The son table index.
<DT><B>Returns:</B><DD>The needed index.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="getUpdateOperation(int)"><!-- --></A><H3>
getUpdateOperation</H3>
<PRE>
public int <B>getUpdateOperation</B>(int&nbsp;index)
                       throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Returns what kind of operation will be done in case of an update of the father
 table specified by <CODE>index</CODE>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The index of the father table.
<DT><B>Returns:</B><DD>The requested operation.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="getDeleteOperation(int)"><!-- --></A><H3>
getDeleteOperation</H3>
<PRE>
public int <B>getDeleteOperation</B>(int&nbsp;index)
                       throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Returns what kind of operation will be done in case of a deletion of the father
 table specified by <CODE>index</CODE>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The index of the father table.
<DT><B>Returns:</B><DD>The requested operation.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="getFatherColumns(int)"><!-- --></A><H3>
getFatherColumns</H3>
<PRE>
public <A HREF="../../javatools/db/DbColumn.html">DbColumn</A>[] <B>getFatherColumns</B>(int&nbsp;index)
                            throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Returns the referenced father columns of a father table whose index is
 specified.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The index of the father table.
<DT><B>Returns:</B><DD>An array containing the referenced father columns.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="getRefColumns(int)"><!-- --></A><H3>
getRefColumns</H3>
<PRE>
public <A HREF="../../javatools/db/DbColumn.html">DbColumn</A>[] <B>getRefColumns</B>(int&nbsp;index)
                         throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Returns the referencing columns of THIS table for a father table whose index
 is specified.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The index of the father column.
<DT><B>Returns:</B><DD>The referencing columns.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="getDefaultValues(int)"><!-- --></A><H3>
getDefaultValues</H3>
<PRE>
public java.lang.Object[] <B>getDefaultValues</B>(int&nbsp;index)
                                    throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Returns an array containing the default values for fields of a father table
 whose index is specified.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The index of the father table.
<DT><B>Returns:</B><DD>An array containing the default values for referencing columns related to
 requested father table.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="clear()"><!-- --></A><H3>
clear</H3>
<PRE>
public void <B>clear</B>()</PRE>
<DL>
<DD>Clears everything.
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="build()"><!-- --></A><H3>
build</H3>
<PRE>
public void <B>build</B>()
           throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>After all settings, it finally builds all static references.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="check(int)"><!-- --></A><H3>
check</H3>
<PRE>
public abstract void <B>check</B>(int&nbsp;operation)
                    throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>After setting all dynamic (i.e. operations, lists etc.) information, it checks
 explicitly if all operations can be done. I suggest to call
 <CODE>checkThis</CODE> method to perform base checking.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>operation</CODE> - The kind of operation (INSERT, UPDATE etc.) that should be done.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="update(int)"><!-- --></A><H3>
update</H3>
<PRE>
public abstract int <B>update</B>(int&nbsp;operation)
                    throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Actually updates the table and all of its son tables. I suggest to call
 <CODE>updateThis</CODE> method to perform base update.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>operation</CODE> - The kind of operation (INSERT, UPDATE etc.) that should be done.
<DT><B>Returns:</B><DD>It should contain the final result of <CODE>execute</CODE> calls to inserters,
 deleters of updaters.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="updateThis(int)"><!-- --></A><H3>
updateThis</H3>
<PRE>
protected int <B>updateThis</B>(int&nbsp;operation)
                  throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Performs base update. It also checks if automatic checking is set.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>operation</CODE> - The operation to be done.
<DT><B>Returns:</B><DD>The real result from an inserter, updater, deleter.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="checkThis(int)"><!-- --></A><H3>
checkThis</H3>
<PRE>
protected void <B>checkThis</B>(int&nbsp;operation)
                  throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Performs base checks.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>operation</CODE> - The operations that should be done.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="checkFathers()"><!-- --></A><H3>
checkFathers</H3>
<PRE>
protected void <B>checkFathers</B>()
                     throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Performs checking for father tables. Used in INSERT and UPDATE operations.
 N.B. Not used in UPDATE-CASCADE operation.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If checking fails.</DL>
</DD>
</DL>
<HR>

<A NAME="checkChildren()"><!-- --></A><H3>
checkChildren</H3>
<PRE>
protected void <B>checkChildren</B>()
                      throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Checks recursively each son.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If checking fails.</DL>
</DD>
</DL>
<HR>

<A NAME="clone()"><!-- --></A><H3>
clone</H3>
<PRE>
protected java.lang.Object <B>clone</B>()
                          throws java.lang.CloneNotSupportedException</PRE>
<DL>
<DD>Clones this object. It is used to build a temporary DbConstraint in
 self-referencing tables.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>clone</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The cloned object.
<DT><B>Throws:</B>
<DD><CODE>java.lang.CloneNotSupportedException</CODE> - Never thrown... usually...</DL>
</DD>
</DL>
<HR>

<A NAME="initStaticLists()"><!-- --></A><H3>
initStaticLists</H3>
<PRE>
protected void <B>initStaticLists</B>()
                        throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Inits static lists, like indexes of son tables, default values of father tables
 etc.
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
<HR>

<A NAME="initLists()"><!-- --></A><H3>
initLists</H3>
<PRE>
protected void <B>initLists</B>()
                  throws <A HREF="../../javatools/db/DbException.html">DbException</A></PRE>
<DL>
<DD>Builds all dynamic lists (where clauses, constraints etc.).
<P>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javatools/db/DbException.html">DbException</A></CODE> - If something goes wrong.</DL>
</DD>
</DL>
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