67 lines
2.0 KiB
Java
67 lines
2.0 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.el.lang;
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import java.io.Externalizable;
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import java.io.IOException;
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import java.io.ObjectInput;
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import java.io.ObjectOutput;
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import java.util.HashMap;
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import java.util.Map;
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import javax.el.ValueExpression;
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import javax.el.VariableMapper;
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public class VariableMapperImpl extends VariableMapper implements Externalizable {
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private static final long serialVersionUID = 1L;
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private Map<String, ValueExpression> vars = new HashMap<>();
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public VariableMapperImpl() {
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super();
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}
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@Override
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public ValueExpression resolveVariable(String variable) {
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return this.vars.get(variable);
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}
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@Override
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public ValueExpression setVariable(String variable,
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ValueExpression expression) {
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if (expression == null) {
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return vars.remove(variable);
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} else {
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return vars.put(variable, expression);
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}
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}
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@SuppressWarnings("unchecked")
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@Override
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public void readExternal(ObjectInput in) throws IOException,
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ClassNotFoundException {
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this.vars = (Map<String, ValueExpression>) in.readObject();
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}
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@Override
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public void writeExternal(ObjectOutput out) throws IOException {
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out.writeObject(this.vars);
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}
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}
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