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EnhancedAccessor
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SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD>
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com.sleepycat.persist.impl</FONT>
<BR>
Class EnhancedAccessor</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.sleepycat.persist.impl.EnhancedAccessor</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>EnhancedAccessor</B><DT>extends java.lang.Object</DL>
</PRE>
<P>
Implements Accessor for a complex persistent class.
<P>
<P>
<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>static boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#EXPECT_ENHANCED">EXPECT_ENHANCED</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#MAX_FIELD_NUM">MAX_FIELD_NUM</A></B></CODE>
<BR>
A large field value to use instead of Integer.MAX_VALUE, to work around
Java JIT compiler bug when doing an (X <= Integer.MAX_VALUE) as would be
done in readXxxKeyFields methods.</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> java.lang.Object</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#getField(java.lang.Object, int, int, boolean)">getField</A></B>(java.lang.Object o,
int field,
int superLevel,
boolean isSecField)</CODE>
<BR>
Returns the value of a given field, representing primitives as primitive
wrapper objects.</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="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#isPriKeyFieldNullOrZero(java.lang.Object)">isPriKeyFieldNullOrZero</A></B>(java.lang.Object o)</CODE>
<BR>
Returns whether the primary key field is null (for a reference type) or
zero (for a primitive integer type).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.Object</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#newArray(int)">newArray</A></B>(int len)</CODE>
<BR>
Creates a new one dimensional array of the given length, having the
target class as its component type.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.Object</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#newInstance()">newInstance</A></B>()</CODE>
<BR>
Creates a new instance of the target class using its default
constructor.</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="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#readNonKeyFields(java.lang.Object, com.sleepycat.persist.impl.EntityInput, int, int, int)">readNonKeyFields</A></B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityInput.html" title="interface in com.sleepycat.persist.impl">EntityInput</A> input,
int startField,
int endField,
int superLevel)</CODE>
<BR>
Reads a range of non-key field values from the given EntityInput,
reading fields in super classes first and in name order within class.</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="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#readPriKeyField(java.lang.Object, com.sleepycat.persist.impl.EntityInput)">readPriKeyField</A></B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityInput.html" title="interface in com.sleepycat.persist.impl">EntityInput</A> input)</CODE>
<BR>
Reads the primary key field value from the given EntityInput.</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="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#readSecKeyFields(java.lang.Object, com.sleepycat.persist.impl.EntityInput, int, int, int)">readSecKeyFields</A></B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityInput.html" title="interface in com.sleepycat.persist.impl">EntityInput</A> input,
int startField,
int endField,
int superLevel)</CODE>
<BR>
Reads a range of secondary key field values from the given EntityInput,
reading fields in super classes first and in name order within class.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#registerClass(java.lang.String, com.sleepycat.persist.impl.Enhanced)">registerClass</A></B>(java.lang.String className,
<A HREF="../../../../com/sleepycat/persist/impl/Enhanced.html" title="interface in com.sleepycat.persist.impl">Enhanced</A> prototype)</CODE>
<BR>
Registers a prototype instance, and should be called during
initialization of the prototype class.</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="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#setField(java.lang.Object, int, int, boolean, java.lang.Object)">setField</A></B>(java.lang.Object o,
int field,
int superLevel,
boolean isSecField,
java.lang.Object value)</CODE>
<BR>
Changes the value of a given field, representing primitives as primitive
wrapper objects.</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="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#writeNonKeyFields(java.lang.Object, com.sleepycat.persist.impl.EntityOutput)">writeNonKeyFields</A></B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityOutput.html" title="interface in com.sleepycat.persist.impl">EntityOutput</A> output)</CODE>
<BR>
Writes all non-key field values to the given EntityOutput, writing
fields in super classes first and in name order within class.</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="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#writePriKeyField(java.lang.Object, com.sleepycat.persist.impl.EntityOutput)">writePriKeyField</A></B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityOutput.html" title="interface in com.sleepycat.persist.impl">EntityOutput</A> output)</CODE>
<BR>
Writes the primary key field value to the given EntityOutput.</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="../../../../com/sleepycat/persist/impl/EnhancedAccessor.html#writeSecKeyFields(java.lang.Object, com.sleepycat.persist.impl.EntityOutput)">writeSecKeyFields</A></B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityOutput.html" title="interface in com.sleepycat.persist.impl">EntityOutput</A> output)</CODE>
<BR>
Writes all secondary key field values to the given EntityOutput,
writing fields in super classes first and in name order within class.</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="EXPECT_ENHANCED"><!-- --></A><H3>
EXPECT_ENHANCED</H3>
<PRE>
public static final boolean <B>EXPECT_ENHANCED</B></PRE>
<DL>
<DL>
</DL>
</DL>
<HR>
<A NAME="MAX_FIELD_NUM"><!-- --></A><H3>
MAX_FIELD_NUM</H3>
<PRE>
public static final int <B>MAX_FIELD_NUM</B></PRE>
<DL>
<DD>A large field value to use instead of Integer.MAX_VALUE, to work around
Java JIT compiler bug when doing an (X <= Integer.MAX_VALUE) as would be
done in readXxxKeyFields methods.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#com.sleepycat.persist.impl.EnhancedAccessor.MAX_FIELD_NUM">Constant Field Values</A></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="registerClass(java.lang.String, com.sleepycat.persist.impl.Enhanced)"><!-- --></A><H3>
registerClass</H3>
<PRE>
public static void <B>registerClass</B>(java.lang.String className,
<A HREF="../../../../com/sleepycat/persist/impl/Enhanced.html" title="interface in com.sleepycat.persist.impl">Enhanced</A> prototype)</PRE>
<DL>
<DD>Registers a prototype instance, and should be called during
initialization of the prototype class. The prototype may be null for
an abstract class.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="newInstance()"><!-- --></A><H3>
newInstance</H3>
<PRE>
public java.lang.Object <B>newInstance</B>()</PRE>
<DL>
<DD>Creates a new instance of the target class using its default
constructor.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="newArray(int)"><!-- --></A><H3>
newArray</H3>
<PRE>
public java.lang.Object <B>newArray</B>(int len)</PRE>
<DL>
<DD>Creates a new one dimensional array of the given length, having the
target class as its component type.
<p>Using a special method for a one dimensional array, which can be
implemented by bytecode generation, is a compromise. We use reflection
to create multidimensional arrays. We could in the future generate code
to create arrays as they are encountered, if there is a need to avoid
reflection for multidimensional arrays.</p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="isPriKeyFieldNullOrZero(java.lang.Object)"><!-- --></A><H3>
isPriKeyFieldNullOrZero</H3>
<PRE>
public boolean <B>isPriKeyFieldNullOrZero</B>(java.lang.Object o)</PRE>
<DL>
<DD>Returns whether the primary key field is null (for a reference type) or
zero (for a primitive integer type). Null and zero are used as an
indication that the key should be assigned from a sequence.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="writePriKeyField(java.lang.Object, com.sleepycat.persist.impl.EntityOutput)"><!-- --></A><H3>
writePriKeyField</H3>
<PRE>
public void <B>writePriKeyField</B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityOutput.html" title="interface in com.sleepycat.persist.impl">EntityOutput</A> output)</PRE>
<DL>
<DD>Writes the primary key field value to the given EntityOutput.
<p>To write a primary key with a reference type, this method must call
EntityOutput.writeKeyObject.</p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - is the object whose primary key field is to be written.<DD><CODE>output</CODE> - the output data to write to.</DL>
</DD>
</DL>
<HR>
<A NAME="readPriKeyField(java.lang.Object, com.sleepycat.persist.impl.EntityInput)"><!-- --></A><H3>
readPriKeyField</H3>
<PRE>
public void <B>readPriKeyField</B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityInput.html" title="interface in com.sleepycat.persist.impl">EntityInput</A> input)</PRE>
<DL>
<DD>Reads the primary key field value from the given EntityInput.
<p>To read a primary key with a reference type, this method must call
EntityInput.readKeyObject.</p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - is the object whose primary key field is to be read.<DD><CODE>input</CODE> - the input data to read from.</DL>
</DD>
</DL>
<HR>
<A NAME="writeSecKeyFields(java.lang.Object, com.sleepycat.persist.impl.EntityOutput)"><!-- --></A><H3>
writeSecKeyFields</H3>
<PRE>
public void <B>writeSecKeyFields</B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityOutput.html" title="interface in com.sleepycat.persist.impl">EntityOutput</A> output)</PRE>
<DL>
<DD>Writes all secondary key field values to the given EntityOutput,
writing fields in super classes first and in name order within class.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - is the object whose secondary key fields are to be written.
<p>If the primary key has a reference type, this method must call
EntityOutput.registerPriKeyObject before writing any other fields.</p><DD><CODE>output</CODE> - the output data to write to.</DL>
</DD>
</DL>
<HR>
<A NAME="readSecKeyFields(java.lang.Object, com.sleepycat.persist.impl.EntityInput, int, int, int)"><!-- --></A><H3>
readSecKeyFields</H3>
<PRE>
public void <B>readSecKeyFields</B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityInput.html" title="interface in com.sleepycat.persist.impl">EntityInput</A> input,
int startField,
int endField,
int superLevel)</PRE>
<DL>
<DD>Reads a range of secondary key field values from the given EntityInput,
reading fields in super classes first and in name order within class.
<p>If the primary key has a reference type, this method must call
EntityInput.registerPriKeyObject before reading any other fields.</p>
<p>To read all fields, pass -1 for superLevel, zero for startField and
MAX_FIELD_NUM for endField. Fields from super classes are read
first.</p>
<p>To read a specific range of fields, pass a non-negative number for
superLevel and the specific indices of the field range to be read in the
class at that level.</p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - is the object whose secondary key fields are to be read.<DD><CODE>input</CODE> - the input data to read from.<DD><CODE>startField</CODE> - the starting field index in the range of fields to
read. To read all fields, the startField should be zero.<DD><CODE>endField</CODE> - the ending field index in the range of fields to read.
To read all fields, the endField should be MAX_FIELD_NUM.<DD><CODE>superLevel</CODE> - is a non-negative number to read the fields of the
class that is the Nth super instance; or a negative number to read
fields in all classes.</DL>
</DD>
</DL>
<HR>
<A NAME="writeNonKeyFields(java.lang.Object, com.sleepycat.persist.impl.EntityOutput)"><!-- --></A><H3>
writeNonKeyFields</H3>
<PRE>
public void <B>writeNonKeyFields</B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityOutput.html" title="interface in com.sleepycat.persist.impl">EntityOutput</A> output)</PRE>
<DL>
<DD>Writes all non-key field values to the given EntityOutput, writing
fields in super classes first and in name order within class.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - is the object whose non-key fields are to be written.<DD><CODE>output</CODE> - the output data to write to.</DL>
</DD>
</DL>
<HR>
<A NAME="readNonKeyFields(java.lang.Object, com.sleepycat.persist.impl.EntityInput, int, int, int)"><!-- --></A><H3>
readNonKeyFields</H3>
<PRE>
public void <B>readNonKeyFields</B>(java.lang.Object o,
<A HREF="../../../../com/sleepycat/persist/impl/EntityInput.html" title="interface in com.sleepycat.persist.impl">EntityInput</A> input,
int startField,
int endField,
int superLevel)</PRE>
<DL>
<DD>Reads a range of non-key field values from the given EntityInput,
reading fields in super classes first and in name order within class.
<p>To read all fields, pass -1 for superLevel, zero for startField and
MAX_FIELD_NUM for endField. Fields from super classes are read
first.</p>
<p>To read a specific range of fields, pass a non-negative number for
superLevel and the specific indices of the field range to be read in the
class at that level.</p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - is the object whose non-key fields are to be read.<DD><CODE>input</CODE> - the input data to read from.<DD><CODE>startField</CODE> - the starting field index in the range of fields to
read. To read all fields, the startField should be zero.<DD><CODE>endField</CODE> - the ending field index in the range of fields to read.
To read all fields, the endField should be MAX_FIELD_NUM.<DD><CODE>superLevel</CODE> - is a non-negative number to read the fields of the
class that is the Nth super instance; or a negative number to read
fields in all classes.</DL>
</DD>
</DL>
<HR>
<A NAME="getField(java.lang.Object, int, int, boolean)"><!-- --></A><H3>
getField</H3>
<PRE>
public java.lang.Object <B>getField</B>(java.lang.Object o,
int field,
int superLevel,
boolean isSecField)</PRE>
<DL>
<DD>Returns the value of a given field, representing primitives as primitive
wrapper objects.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - is the object containing the key field.<DD><CODE>field</CODE> - is the field index.<DD><CODE>superLevel</CODE> - is a positive number to identify the field of the
class that is the Nth super instance; or zero to identify the field in
this class.<DD><CODE>isSecField</CODE> - is true for a secondary key field or false for a
non-key field.
<DT><B>Returns:</B><DD>the current field value, or null for a reference type field
that is null.</DL>
</DD>
</DL>
<HR>
<A NAME="setField(java.lang.Object, int, int, boolean, java.lang.Object)"><!-- --></A><H3>
setField</H3>
<PRE>
public void <B>setField</B>(java.lang.Object o,
int field,
int superLevel,
boolean isSecField,
java.lang.Object value)</PRE>
<DL>
<DD>Changes the value of a given field, representing primitives as primitive
wrapper objects.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - is the object containing the key field.<DD><CODE>field</CODE> - is the field index.<DD><CODE>superLevel</CODE> - is a positive number to identify the field of the
class that is the Nth super instance; or zero to identify the field in
this class.<DD><CODE>isSecField</CODE> - is true for a secondary key field or false for a
non-key field.<DD><CODE>value</CODE> - is the new value of the field, or null to set a reference
type field to null.</DL>
</DD>
</DL>
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distrib
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