| /* |
| * 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.el; |
| |
| import java.lang.reflect.Method; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import javax.el.ELContext; |
| import javax.el.ELResolver; |
| import javax.el.FunctionMapper; |
| import javax.el.ValueExpression; |
| import javax.el.VariableMapper; |
| |
| /** |
| * Implementation of ELContext |
| * |
| * @author Jacob Hookom |
| */ |
| public final class ELContextImpl extends ELContext { |
| |
| private static final FunctionMapper NullFunctionMapper = new FunctionMapper() { |
| @Override |
| public Method resolveFunction(String prefix, String localName) { |
| return null; |
| } |
| }; |
| |
| private static final class VariableMapperImpl extends VariableMapper { |
| |
| private Map<String, ValueExpression> vars; |
| |
| @Override |
| public ValueExpression resolveVariable(String variable) { |
| if (vars == null) { |
| return null; |
| } |
| return vars.get(variable); |
| } |
| |
| @Override |
| public ValueExpression setVariable(String variable, |
| ValueExpression expression) { |
| if (vars == null) |
| vars = new HashMap<String, ValueExpression>(); |
| return vars.put(variable, expression); |
| } |
| |
| } |
| |
| private final ELResolver resolver; |
| |
| private FunctionMapper functionMapper = NullFunctionMapper; |
| |
| private VariableMapper variableMapper; |
| |
| public ELContextImpl() { |
| this(ELResolverImpl.getDefaultResolver()); |
| } |
| |
| public ELContextImpl(ELResolver resolver) { |
| this.resolver = resolver; |
| } |
| |
| @Override |
| public ELResolver getELResolver() { |
| return this.resolver; |
| } |
| |
| @Override |
| public FunctionMapper getFunctionMapper() { |
| return this.functionMapper; |
| } |
| |
| @Override |
| public VariableMapper getVariableMapper() { |
| if (this.variableMapper == null) { |
| this.variableMapper = new VariableMapperImpl(); |
| } |
| return this.variableMapper; |
| } |
| |
| public void setFunctionMapper(FunctionMapper functionMapper) { |
| this.functionMapper = functionMapper; |
| } |
| |
| public void setVariableMapper(VariableMapper variableMapper) { |
| this.variableMapper = variableMapper; |
| } |
| |
| } |