| package org.apache.tapestry.engine; |
| |
| import ognl.Node; |
| |
| /** |
| * Cache of compiled OGNL expressions. |
| * |
| * @author Howard M. Lewis Ship |
| * @since 4.0 |
| */ |
| public interface ExpressionCache |
| { |
| /** |
| * Returns the compiled ognl expression for the given target object class / expression |
| * combination. |
| * |
| * @param target |
| * The object this expression is to be used for. |
| * @param expression |
| * The expression. |
| * @return |
| * The compiled (or new if neccessary) ognl statement. |
| */ |
| Object get(Object target, String expression); |
| |
| /** |
| * Stores a parsed ognl expression for the given object type. |
| * |
| * @param target |
| * The target object expression compiled for. |
| * @param expression |
| * The ognl string expression node represents. |
| * @param node |
| * The parsed OGNL expression to cache. |
| */ |
| void cache(Object target, String expression, Node node); |
| |
| /** |
| * Invoked by {@link AbstractEngine} to clear all cache data. |
| */ |
| void reset(); |
| } |