Accessing a user-defined policy from a graphical data map

Use the Graphical Data Mapping editor to access the properties of a user-defined policy in a static manner.

Before you begin

Complete the following tasks:

About this task

If you created a user-defined policy, and created properties for that policy, you can query those properties by using the MbPolicy.getPolicy call from a Custom Java™ transform in a message map.

Procedure

Complete the following steps to use Java in a Custom Java transform:

Create a Java class (for example, MyPolicyAccessClass) with the following static method:
```
Static String getPolicyProperty(String policyProjectName, String propertyName)
```
Implement getPolicyProperty to look up the passed policyProjectName by using code such as in the following example.
```
MbPolicy myPol = MbPolicy.getPolicy("UserDefined", policyProjectName);
```
Ensure that your method returns the value of the passed propertyName by using code such as in the following example.
```
resultPropertyValue = myPol.getPropertyValueAsString(propertyName);
```
Create a message map.
See Creating message maps.
Add a Custom Java transform to the map.
See Mapping an element by using a Custom Java transform.
Set the following properties for the Custom Java transform.
- Call the Java method MyPolicyAccessClass.getPolicyProperty().
- Set suitable values for the policyProjectName and propertyName parameters.
You can map the returned resultPropertyValue from the output of the Custom Java transform.