001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.wicket.request.parameter; 018 019import java.util.ArrayList; 020import java.util.Collections; 021import java.util.LinkedHashSet; 022import java.util.List; 023import java.util.Set; 024 025import org.apache.wicket.request.IRequestParameters; 026import org.apache.wicket.request.Url; 027import org.apache.wicket.request.Url.QueryParameter; 028import org.apache.wicket.util.lang.Args; 029import org.apache.wicket.util.lang.Objects; 030import org.apache.wicket.util.string.StringValue; 031 032/** 033 * Utility class that expresses query parameters from {@link Url} as {@link IRequestParameters}. 034 * 035 * @author Matej Knopp 036 */ 037public class UrlRequestParametersAdapter implements IRequestParameters 038{ 039 private final Url url; 040 041 /** 042 * Construct. 043 * 044 * @param url 045 */ 046 public UrlRequestParametersAdapter(final Url url) 047 { 048 Args.notNull(url, "url"); 049 050 this.url = url; 051 } 052 053 /** 054 * @see org.apache.wicket.request.IRequestParameters#getParameterNames() 055 */ 056 @Override 057 public Set<String> getParameterNames() 058 { 059 Set<String> result = new LinkedHashSet<>(); 060 for (QueryParameter parameter : url.getQueryParameters()) 061 { 062 result.add(parameter.getName()); 063 } 064 return Collections.unmodifiableSet(result); 065 } 066 067 /** 068 * @see org.apache.wicket.request.IRequestParameters#getParameterValue(java.lang.String) 069 */ 070 @Override 071 public StringValue getParameterValue(final String name) 072 { 073 return url.getQueryParameterValue(name); 074 } 075 076 /** 077 * @see org.apache.wicket.request.IRequestParameters#getParameterValues(java.lang.String) 078 */ 079 @Override 080 public List<StringValue> getParameterValues(final String name) 081 { 082 List<StringValue> values = null; 083 for (QueryParameter parameter : url.getQueryParameters()) 084 { 085 if (Objects.equal(name, parameter.getName())) 086 { 087 if (values == null) 088 { 089 values = new ArrayList<>(); 090 } 091 values.add(StringValue.valueOf(parameter.getValue())); 092 } 093 } 094 return values != null ? Collections.unmodifiableList(values) : null; 095 } 096}