How to inject TreeMap?

[Kamil Kuchta]

How to inject TreeMap?
This map is fulfill in the application.
My beans

<bean id="dwarfs" class="java.util.TreeMap" />

<bean id="house" class="pl.edu.agh.snowwhite.logic.House">
	<property name="dwarfs" ref="dwarfs"></property>
</bean>

And setter in class House

public void setDwarfs(Map<String, Dwarf> dwarfs){
	this.dwarfs=dwarfs;
}

Exception
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'house' defined in file [snowWhiteBeans.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'dwarfs' of bean class [pl.edu.agh.snowwhite.logic.House]: Bean property 'dwarfs' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

And what with generic data information Map<String, Dwarf>? Should bean contain this generic information?

[Vivek K Singh]

It should work, Try this:

public class House {
	Map<String, Dwarf> dwarfs;
	public void setDwarfs(Map<String, Dwarf> dwarfs){   
	    this.dwarfs=dwarfs;   
	} 
}

public class Dwarf {
	String name;
}

And write the context as.

<bean id="dwarfs" class="java.util.TreeMap" />   
  
<bean id="house" class="pl.edu.agh.snowwhite.logic.House">   
     <property name="dwarfs" ref="dwarfs" />   
</bean>

[Christophe Verré]

Is your setter method in the correct House class ? (pl.edu.agh.snowwhite.logic.House.java)

[Kamil Kuchta]

It turns out that I already had a getter getDwarfs() which returns a length of collection. When I changed bean name from dwarfs to dwarfsMap (and setter name setDwarfsMap) it started work. I think that that getter was a reason of my problems