serialization testing

spring-binding/src/main/java/org/springframework/binding/expression/el/ELContextFactory.java

@@ -15,6 +15,8 @@
  */
 package org.springframework.binding.expression.el;
 
+import java.io.Serializable;
+
 import javax.el.ELContext;
 import javax.el.ELResolver;
 
@@ -28,7 +30,7 @@ import javax.el.ELResolver;
  * @author Keith Donald
  * @author Jeremy Grelle
  */
-public interface ELContextFactory {
+public interface ELContextFactory extends Serializable {
 
 	/**
 	 * Configures and returns an {@link ELContext} to be used in evaluating EL expressions on the given base target

spring-binding/src/main/java/org/springframework/binding/expression/ognl/OgnlExpression.java

@@ -69,16 +69,16 @@ class OgnlExpression implements Expression {
 		this.expressionString = expressionString;
 	}
 
-	public int hashCode() {
-		return expression.hashCode();
-	}
-
 	public boolean equals(Object o) {
 		if (!(o instanceof OgnlExpression)) {
 			return false;
 		}
 		OgnlExpression other = (OgnlExpression) o;
-		return expression.equals(other.expression);
+		return expressionString.equals(other.expressionString);
+	}
+
+	public int hashCode() {
+		return expressionString.hashCode();
 	}
 
 	public Object getValue(Object context) throws EvaluationException {