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