[New] Added StrolchTransaction.getPolicy(PolicyContainer, Class<T>) to simplify getting policies

li.strolch.agent/src/main/java/li/strolch/persistence/api/AbstractTransaction.java

@@ -418,6 +418,12 @@ public abstract class AbstractTransaction implements StrolchTransaction {
 		return this.container;
 	}
 
+	@Override
+	public <T extends StrolchPolicy> T getPolicy(PolicyContainer element, Class<T> clazz) {
+		PolicyDef policyDef = element.getPolicyDef(clazz);
+		return getContainer().getComponent(PolicyHandler.class).getPolicy(policyDef, this);
+	}
+
 	@Override
 	@Deprecated
 	public <T extends StrolchPolicy> T getPolicy(PolicyDef policyDef) {

li.strolch.agent/src/main/java/li/strolch/persistence/api/StrolchTransaction.java

@@ -229,6 +229,20 @@ public interface StrolchTransaction extends AutoCloseable {
 	 */
 	ComponentContainer getContainer();
 
+	/**
+	 * Instantiates the policy using the given {@link Class} to retrieve the {@link PolicyDef} from the given element
+	 *
+	 * @param element
+	 * 		the element from which to retrieve the {@link PolicyDef
+	 * @param <T>
+	 * 		the type of policy to return
+	 *
+	 * @return the policy
+	 * @param clazz
+ * 		the type of policy to return
+	 */
+	<T extends StrolchPolicy> T getPolicy(PolicyContainer element, Class<T> clazz);
+
 	/**
 	 * Instantiates the policy using the given {@link PolicyDef}
 	 *