001// Copyright 2005 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry.multipart; 016 017import java.util.Collections; 018import java.util.Enumeration; 019import java.util.Map; 020 021import javax.servlet.http.HttpServletRequest; 022import javax.servlet.http.HttpServletRequestWrapper; 023 024import org.apache.hivemind.util.Defense; 025 026/** 027 * {@link javax.servlet.http.HttpServletRequest} wrapper that provides access to the form 028 * field values uploaded in a multipart request. 029 * 030 * @author Howard M. Lewis Ship 031 * @since 4.0 032 */ 033public class UploadFormParametersWrapper extends HttpServletRequestWrapper 034{ 035 /** 036 * Map of {@link ValuePart} keyed on parameter name. 037 */ 038 private Map _parameterMap; 039 040 /** 041 * @param parameterMap 042 * a map whose keys are parameter names and whose values are arrays of Strings. 043 */ 044 public UploadFormParametersWrapper(HttpServletRequest request, Map parameterMap) 045 { 046 super(request); 047 048 Defense.notNull(parameterMap, "parameterMap"); 049 050 _parameterMap = Collections.unmodifiableMap(parameterMap); 051 } 052 053 public String getParameter(String name) 054 { 055 String[] values = getParameterValues(name); 056 057 return (values == null || values.length == 0) ? null : values[0]; 058 } 059 060 public Map getParameterMap() 061 { 062 return _parameterMap; 063 } 064 065 public Enumeration getParameterNames() 066 { 067 return Collections.enumeration(_parameterMap.keySet()); 068 } 069 070 public String[] getParameterValues(String name) 071 { 072 return (String[]) _parameterMap.get(name); 073 } 074 075 public String toString() 076 { 077 return "<UploadFormPartWrapper for " + getRequest() + ">"; 078 } 079}