[New] Simplified instantiating policy: tx.getPolicy(PolicyDef)

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

@@ -39,9 +39,12 @@ import li.strolch.model.audit.Audit;
 import li.strolch.model.parameter.Parameter;
 import li.strolch.model.parameter.StringListParameter;
 import li.strolch.model.parameter.StringParameter;
+import li.strolch.model.policy.PolicyDef;
 import li.strolch.model.query.*;
 import li.strolch.model.timedstate.StrolchTimedState;
 import li.strolch.model.timevalue.IValue;
+import li.strolch.policy.PolicyHandler;
+import li.strolch.policy.StrolchPolicy;
 import li.strolch.privilege.base.AccessDeniedException;
 import li.strolch.privilege.base.PrivilegeException;
 import li.strolch.privilege.base.PrivilegeModelException;
@@ -360,6 +363,11 @@ public abstract class AbstractTransaction implements StrolchTransaction {
 		return this.container;
 	}
 
+	@Override
+	public <T extends StrolchPolicy> T getPolicy(PolicyDef policyDef) {
+		return getContainer().getComponent(PolicyHandler.class).getPolicy(policyDef, this);
+	}
+
 	private void assertQueryAllowed(StrolchQuery query) {
 		try {
 			getPrivilegeContext().validateAction(query);

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

@@ -32,6 +32,7 @@ import li.strolch.model.audit.AuditVisitor;
 import li.strolch.model.parameter.Parameter;
 import li.strolch.model.parameter.StringListParameter;
 import li.strolch.model.parameter.StringParameter;
+import li.strolch.model.policy.PolicyDef;
 import li.strolch.model.query.ActivityQuery;
 import li.strolch.model.query.AuditQuery;
 import li.strolch.model.query.OrderQuery;
@@ -39,6 +40,7 @@ import li.strolch.model.query.ResourceQuery;
 import li.strolch.model.visitor.ActivityVisitor;
 import li.strolch.model.visitor.OrderVisitor;
 import li.strolch.model.visitor.ResourceVisitor;
+import li.strolch.policy.StrolchPolicy;
 import li.strolch.privilege.base.AccessDeniedException;
 import li.strolch.privilege.model.Certificate;
 import li.strolch.privilege.model.PrivilegeContext;
@@ -161,6 +163,18 @@ public interface StrolchTransaction extends AutoCloseable {
 	 */
 	ComponentContainer getContainer();
 
+	/**
+	 * Instantiates the policy using the given {@link PolicyDef}
+	 *
+	 * @param policyDef
+	 * 		the policy definition
+	 * @param <T>
+	 * 		the type of policy to return
+	 *
+	 * @return the policy
+	 */
+	<T extends StrolchPolicy> T getPolicy(PolicyDef policyDef);
+
 	/**
 	 * Returns the currently set {@link TransactionCloseStrategy}
 	 *

li.strolch.agent/src/main/java/li/strolch/policy/PolicyHandler.java

@@ -25,17 +25,6 @@ import li.strolch.persistence.api.StrolchTransaction;
  * </p>
  *
  * <p>
- * Objects which require delegation can use a {@link PolicyConfiguration} element and then retrieve a StrolchPolicy
- * instance from this {@link PolicyHandler}.
- * </p>
- *
- * <p>
- * {@link PolicyConfiguration} have a mapping of a policy type, i.e. an interface for a specific delegation. This
- * interface has concrete implementations which are then returned by the {@link PolicyHandler} depending on the current
- * configuration
- * </p>
- *
- * <p>
  * The resolving of a policy instance is handled by a {@link PolicyDefVisitor}
  * <p>
  *