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. 014 015 package org.apache.tapestry.multipart; 016 017 import java.util.Collections; 018 import java.util.Enumeration; 019 import java.util.Map; 020 021 import javax.servlet.http.HttpServletRequest; 022 import javax.servlet.http.HttpServletRequestWrapper; 023 024 import org.apache.hivemind.util.Defense; 025 026 /** 027 * {@link javax.servlet.http.HttpServletRequest} wrapper that provides 028 * access to the form field values uploaded in a multipart request. 029 * 030 * @author Howard M. Lewis Ship 031 * @since 4.0 032 */ 033 public class UploadFormParametersWrapper extends HttpServletRequestWrapper 034 { 035 036 /** 037 * Map of {@link ValuePart} keyed on parameter name. 038 */ 039 private Map _parameterMap; 040 041 /** 042 * @param parameterMap 043 * a map whose keys are parameter names and whose values are 044 * arrays of Strings. 045 */ 046 public UploadFormParametersWrapper(HttpServletRequest request, 047 Map parameterMap) 048 { 049 super(request); 050 051 Defense.notNull(parameterMap, "parameterMap"); 052 053 _parameterMap = Collections.unmodifiableMap(parameterMap); 054 } 055 056 public String getParameter(String name) 057 { 058 String[] values = getParameterValues(name); 059 060 return (values == null || values.length == 0) ? null : values[0]; 061 } 062 063 public Map getParameterMap() 064 { 065 return _parameterMap; 066 } 067 068 public Enumeration getParameterNames() 069 { 070 return Collections.enumeration(_parameterMap.keySet()); 071 } 072 073 public String[] getParameterValues(String name) 074 { 075 return (String[]) _parameterMap.get(name); 076 } 077 078 public String toString() 079 { 080 return "<UploadFormPartWrapper for " + getRequest() + ">"; 081 } 082 }