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distrib > Mandriva > 2011.0 > x86_64 > media > main-release > by-pkgid > a151a9789d7f6da162486c8d892d2428 > files > 306

ws-jaxme-javadoc-0.5.2-1.0.6mdv2011.0.noarch.rpm

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DirectAccessible
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org.apache.ws.jaxme.js</FONT>
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Interface DirectAccessible</H2>
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<DT><B>All Superinterfaces:</B> <DD><A HREF="../../../../../org/apache/ws/jaxme/js/TypedValue.html" title="interface in org.apache.ws.jaxme.js">TypedValue</A></DD>
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<DT><B>All Known Subinterfaces:</B> <DD><A HREF="../../../../../org/apache/ws/jaxme/js/LocalJavaField.html" title="interface in org.apache.ws.jaxme.js">LocalJavaField</A></DD>
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<DT><PRE>public interface <B>DirectAccessible</B><DT>extends <A HREF="../../../../../org/apache/ws/jaxme/js/TypedValue.html" title="interface in org.apache.ws.jaxme.js">TypedValue</A></DL>
</PRE>

<P>
<p>This interface is an abstract base for fields and similar
 objects. It doesn't define many methods, it mainly indicates, that
 the implementations value is directly and fast accessible in
 the generated code. The use is best demonstrated by an example.
 Suggest the following piece of code:</p>
 <pre>
     Object value;
     return new Object[]{"((", value, ") * (", value, "))"};
 </pre>
 <p>The example is well suited for the case, where <code>value</code>
 is a variable name like "i". It is not suited, if "value" contains
 an expensive method call like "sin(x)". It is even wrong in the
 case "i++".</p>
 <p>By using the interface <code>DirectAccessible</code>, you can
 change the implementation of <code>getSquare()</code> to look
 like this:
 <pre>
     Object value;
     JavaQName type;
     if (!(value instanceof DirectAccessible)) {
       LocalJavaField v = pMethod.newJavaField(type);
       v.addLine(value);
       v.setFinal(true);
       value = v;
     }
     return new Object[]{"((", value, ") * (", value, "))"};
 </pre>
 <p>This results in code, which is far more readable and better
 optimized.</p>
<P>

<P>
<DL>
<DT><B>Author:</B></DT>
  <DD><a href="mailto:jwi@softwareag.com">Jochen Wiedmann</a></DD>
</DL>
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<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/ws/jaxme/js/DirectAccessible.html#isNullable()">isNullable</A></B>()</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns whether the value is possibly null.</TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/ws/jaxme/js/DirectAccessible.html#setNullable(boolean)">setNullable</A></B>(boolean&nbsp;pNullable)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets whether the value is possibly null.</TD>
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<TH ALIGN="left"><B>Methods inherited from interface org.apache.ws.jaxme.js.<A HREF="../../../../../org/apache/ws/jaxme/js/TypedValue.html" title="interface in org.apache.ws.jaxme.js">TypedValue</A></B></TH>
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<A NAME="isNullable()"><!-- --></A><H3>
isNullable</H3>
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boolean <B>isNullable</B>()</PRE>
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<DD><p>Returns whether the value is possibly null.</p>
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setNullable</H3>
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void <B>setNullable</B>(boolean&nbsp;pNullable)</PRE>
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