/*
 * 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;

/**
 * An interface for ELInterpreter extension
 * ELResolving is a bottleneck when there are many ELs in one JSP file.
 * Suppose it can be extended by vendor so that vendor can do some code generation.
 *  
 * @author Sheldon Shao (xshao@ebay.com)
 */
public interface ELInterpreter {

    /**
     * Produces a String representing a call to the EL interpreter.
     *
     * @param context JspCompilationContext
     * @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.
     * @param XmlEscape True if the result should do XML escaping
     * @return a String representing a call to the EL interpreter.
     */
    public String interpreterCall(JspCompilationContext context,
            boolean isTagFile, String expression,
            Class<?> expectedType, String fnmapvar, boolean xmlEscape);
}