| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.jasper.compiler; |
| |
| import org.apache.jasper.JspCompilationContext; |
| |
| /** |
| * Defines the interface for the expression language interpreter. This allows |
| * users to provide custom EL interpreter implementations that can optimise |
| * EL processing for an application by , for example, performing code generation |
| * for simple expressions. |
| */ |
| public interface ELInterpreter { |
| |
| /** |
| * Returns the string representing the code that will be inserted into the |
| * servlet generated for JSP. The default implementation creates a call to |
| * {@link org.apache.jasper.runtime.PageContextImpl#proprietaryEvaluate( |
| * String, Class, javax.servlet.jsp.PageContext, |
| * org.apache.jasper.runtime.ProtectedFunctionMapper)} but other |
| * implementations may produce more optimised code. |
| * |
| * @param expression a String containing zero or more "${}" expressions |
| * @param expectedType the expected type of the interpreted result |
| * @param fnmapvar Variable pointing to a function map. |
| * @return a String representing a call to the EL interpreter. |
| */ |
| public String interpreterCall(JspCompilationContext context, |
| boolean isTagFile, String expression, |
| Class<?> expectedType, String fnmapvar); |
| } |