Request parameters

[knisterpeter]

Is there a way to use request parameters as initials values for a managed bean/component (e.g. a stateful bean)?
In plain JSF one could specify a managed-property and set #{param.name} as initial value. How do you do this with seam? I've tried to port my application to seam but the initial values are always null.

[pmuir]

Use page parameters or @RequestParameter

[knisterpeter]

Ok, I could create a simple bean component and specify @In("#{param...}").
But I get this exception for my bean:

java.lang.IllegalArgumentException: Can not set java.lang.Integer field de.llynch.kingpin.bean.ConfigBean.campaignId to java.lang.String
 sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:146)
 sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:150)
 sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:63)
 java.lang.reflect.Field.set(Field.java:657)
 org.jboss.seam.util.Reflections.set(Reflections.java:63)
 org.jboss.seam.Component.setFieldValue(Component.java:1555)
 org.jboss.seam.Component.access$500(Component.java:135)
 org.jboss.seam.Component$BijectedField.set(Component.java:2285)
 org.jboss.seam.Component.injectAttributes(Component.java:1368)
 org.jboss.seam.Component.inject(Component.java:1195)

[christian.bauer]

Pete already gave you the answer.