| /* |
| * 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 freemarker.ext.servlet; |
| |
| import java.util.ArrayList; |
| import java.util.Enumeration; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import javax.servlet.http.HttpServletRequest; |
| |
| import freemarker.template.SimpleCollection; |
| import freemarker.template.SimpleScalar; |
| import freemarker.template.TemplateCollectionModel; |
| import freemarker.template.TemplateHashModelEx; |
| import freemarker.template.TemplateModel; |
| |
| /** |
| * TemplateHashModel wrapper for a HttpServletRequest parameters. |
| */ |
| |
| public class HttpRequestParametersHashModel |
| implements |
| TemplateHashModelEx { |
| private final HttpServletRequest request; |
| private List keys; |
| |
| public HttpRequestParametersHashModel(HttpServletRequest request) { |
| this.request = request; |
| } |
| |
| @Override |
| public TemplateModel get(String key) { |
| String value = request.getParameter(key); |
| return value == null ? null : new SimpleScalar(value); |
| } |
| |
| @Override |
| public boolean isEmpty() { |
| return !request.getParameterNames().hasMoreElements(); |
| } |
| |
| @Override |
| public int size() { |
| return getKeys().size(); |
| } |
| |
| @Override |
| public TemplateCollectionModel keys() { |
| return new SimpleCollection(getKeys().iterator()); |
| } |
| |
| @Override |
| public TemplateCollectionModel values() { |
| final Iterator iter = getKeys().iterator(); |
| return new SimpleCollection( |
| new Iterator() { |
| @Override |
| public boolean hasNext() { |
| return iter.hasNext(); |
| } |
| @Override |
| public Object next() { |
| return request.getParameter((String) iter.next()); |
| } |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| }); |
| } |
| |
| protected String transcode(String string) { |
| return string; |
| } |
| |
| private synchronized List getKeys() { |
| if (keys == null) { |
| keys = new ArrayList(); |
| for (Enumeration enumeration = request.getParameterNames(); enumeration.hasMoreElements(); ) { |
| keys.add(enumeration.nextElement()); |
| } |
| } |
| return keys; |
| } |
| } |