| package org.apache.commons.ognl; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.Enumeration; |
| import java.util.Map; |
| |
| /** |
| * Implementation of PropertyAccessor that provides "property" reference to "nextElement" (aliases to "next" also) and |
| * "hasMoreElements" (also aliased to "hasNext"). |
| */ |
| public class EnumerationPropertyAccessor |
| extends ObjectPropertyAccessor |
| implements PropertyAccessor // This is here to make javadoc show this class as an implementor |
| { |
| @Override |
| public Object getProperty( Map<String, Object> context, Object target, Object name ) |
| throws OgnlException |
| { |
| Object result; |
| Enumeration<?> e = (Enumeration<?>) target; // check performed by the invoker |
| |
| if ( name instanceof String ) |
| { |
| if ( "next".equals( name ) || "nextElement".equals( name ) ) |
| { |
| result = e.nextElement(); |
| } |
| else |
| { |
| if ( "hasNext".equals( name ) || "hasMoreElements".equals( name ) ) |
| { |
| result = e.hasMoreElements() ? Boolean.TRUE : Boolean.FALSE; |
| } |
| else |
| { |
| result = super.getProperty( context, target, name ); |
| } |
| } |
| } |
| else |
| { |
| result = super.getProperty( context, target, name ); |
| } |
| return result; |
| } |
| |
| @Override |
| public void setProperty( Map<String, Object> context, Object target, Object name, Object value ) |
| throws OgnlException |
| { |
| throw new IllegalArgumentException( "can't set property " + name + " on Enumeration" ); |
| } |
| } |