implement new interface method

org.springframework.context/src/main/java/org/springframework/context/expression/BeanExpressionContextAccessor.java

@@ -17,6 +17,7 @@
 package org.springframework.context.expression;
 
 import org.springframework.beans.factory.config.BeanExpressionContext;
+import org.springframework.core.convert.TypeDescriptor;
 import org.springframework.expression.AccessException;
 import org.springframework.expression.EvaluationContext;
 import org.springframework.expression.PropertyAccessor;
@@ -50,4 +51,9 @@ public class BeanExpressionContextAccessor implements PropertyAccessor {
 		return new Class[] {BeanExpressionContext.class};
 	}
 
+	public TypeDescriptor getTypeDescriptor(EvaluationContext context,
+			Object target, String name) {
+		return null;
+	}
+
 }

org.springframework.context/src/main/java/org/springframework/context/expression/BeanFactoryAccessor.java

@@ -17,6 +17,7 @@
 package org.springframework.context.expression;
 
 import org.springframework.beans.factory.BeanFactory;
+import org.springframework.core.convert.TypeDescriptor;
 import org.springframework.expression.AccessException;
 import org.springframework.expression.EvaluationContext;
 import org.springframework.expression.PropertyAccessor;
@@ -50,4 +51,9 @@ public class BeanFactoryAccessor implements PropertyAccessor {
 		return new Class[] {BeanFactory.class};
 	}
 
+	public TypeDescriptor getTypeDescriptor(EvaluationContext context,
+			Object target, String name) {
+		return null;
+	}
+
 }

org.springframework.context/src/main/java/org/springframework/context/expression/MapAccessor.java

@@ -18,6 +18,7 @@ package org.springframework.context.expression;
 
 import java.util.Map;
 
+import org.springframework.core.convert.TypeDescriptor;
 import org.springframework.expression.AccessException;
 import org.springframework.expression.EvaluationContext;
 import org.springframework.expression.PropertyAccessor;
@@ -51,5 +52,10 @@ public class MapAccessor implements PropertyAccessor {
 	public Class[] getSpecificTargetClasses() {
 		return new Class[] {Map.class};
 	}
+	
+	public TypeDescriptor getTypeDescriptor(EvaluationContext context,
+			Object target, String name) {
+		return null;
+	}
 
 }