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POjava bean with static setter function
 

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    <p>I have a web application that executes on tomcat 6.</p> <p>I have a MysqlDb class that uses a BasicDataSource from a spring JDBC.</p> <p>so far I've used the following bean configuration in <code>web.xml</code>:</p> <pre><code>&lt;bean id="MysqlDb" class="com.xpogames.gamesisland.mysql.MysqlDb"&gt; &lt;property name="idDataSource" ref="idDataSource"/&gt; &lt;/bean&gt; </code></pre> <p>and I had the following setter function:</p> <pre><code> public void setidDataSource(BasicDataSource ds) { this._dataSource=(DataSource)ds; this._simpleJdbcTemplate = new SimpleJdbcTemplate(_dataSource); this._jdbcTemplate = new JdbcTemplate(_dataSource); } </code></pre> <p>I want to convert my class to use static functions, so I created an empty private constructor so the class won't explicitly instantiated by callers.</p> <p>besides that I changed the <code>setidDataSource</code> function to a static function, but when I try to do that I get the following error:</p> <blockquote> <p>Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'idDataSource' of bean class [com.xpogames.gamesisland.mysql.MysqlDb]: Bean property 'idDataSource' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?</p> </blockquote> <p>is there a way to resolve this issue in web.xml or do I need to manually fetch the ServletContext</p> <pre><code>ServletContext servletContext = this.getServletContext(); this._context = WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext); </code></pre> <p>and fetch the bean from there and just remove the lines i printed here from <code>web.xml</code> ?</p>
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    1. COYou can't use static setter methods. That just won't work, they need to be instance methods.
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    2. COIt's not a bean if it doesn't have a setter (instance) method. Basically, a bean is an instance/an object; and static members don't refer to an instance but just to static data. Hence you've got an object without a method to mutate it (I have no idea why you want static "setters", this seems oxymoronic). You might be able to persuade the datasource to work with it, depending on how strict its checks are, but I wouldn't hold anything against it if it refused to cooperate.
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    3. COwhat exactly are you trying to achieve? Spring offers other ways for bean creation, like factories.
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