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SPR-7443 - Constructor arg resolution by name (doc) 

Added documentation on constructor argument 
disambiguation by using the argument names.
This commit is contained in:
Oliver Gierke 2010-09-15 06:37:05 +00:00
parent b2b195e2cf
commit e8b9c6d5ff
1 changed files with 16 additions and 0 deletions
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16
spring-framework-reference/src/beans-dependencies.xml
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@ -158,6 +158,22 @@ public class ExampleBean {
has two arguments of the same type. Note that the <emphasis>index is has two arguments of the same type. Note that the <emphasis>index is
0 based</emphasis>.</para> 0 based</emphasis>.</para>
</section> </section>
<section id="beans-factory-ctor-arguments-name">
<title>Constructor argument name</title>
<para>As of Spring 3.0 you can also use the constructor parameter
name for value disambiguation:</para>
<programlisting language="xml">&lt;bean id="exampleBean" class="examples.ExampleBean"&gt;
&lt;constructor-arg name="years" value="7500000"/&gt;
&lt;constructor-arg name="ultimateanswer" value="42"/&gt;
&lt;/bean&gt;</programlisting>
<para>Keep in mind that your code has to be compiled with the debug
flag enabled so that Spring can lookup the parameter name from the
constructor.</para>
</section>
</section> </section>
</section> </section>