1 /* 2 * $Id: ExpressionEvaluatorProcessor.java 20321 2010-11-24 15:21:24Z dfeist $ 3 * -------------------------------------------------------------------------------------- 4 * Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com 5 * 6 * The software in this package is published under the terms of the CPAL v1.0 7 * license, a copy of which has been included with this distribution in the 8 * LICENSE.txt file. 9 */ 10 package org.mule.registry; 11 12 import org.mule.api.MuleContext; 13 import org.mule.api.expression.ExpressionEvaluator; 14 import org.mule.api.lifecycle.Disposable; 15 import org.mule.api.registry.PreInitProcessor; 16 17 /** 18 * Registers ExpressionEvaluators with the {@link org.mule.expression.DefaultExpressionManager} so that they will 19 * be resolved at run-time. 20 * {@link org.mule.api.expression.ExpressionEvaluator} objects are used to execute property expressions (usually on the 21 * current message) at run-time to extract a dynamic value. 22 */ 23 public class ExpressionEvaluatorProcessor implements PreInitProcessor, Disposable 24 { 25 private MuleContext context; 26 27 public ExpressionEvaluatorProcessor(MuleContext context) 28 { 29 this.context = context; 30 } 31 32 public Object process(Object object) 33 { 34 if(object instanceof ExpressionEvaluator) 35 { 36 context.getExpressionManager().registerEvaluator((ExpressionEvaluator)object); 37 } 38 return object; 39 } 40 41 /** 42 * A lifecycle method where implementor should free up any resources. If an 43 * exception is thrown it should just be logged and processing should continue. 44 * This method should not throw Runtime exceptions. 45 */ 46 public void dispose() 47 { 48 context.getExpressionManager().clearEvaluators(); 49 } 50 }