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.commons.chain.web; 018 019import java.util.Enumeration; 020import java.util.Objects; 021import java.util.function.Function; 022import java.util.function.Supplier; 023 024/** 025 * Implementation of {@code Map} for immutable parameter name-values with 026 * a parameter-provider. 027 * 028 * @param <P> the type of the parameter-provider 029 * 030 * @author Graff Stefan 031 * @since Chain 1.3 032 */ 033public class ParamValuesMap<P> extends ParameterMap<P, String[]> { 034 035 /** 036 * The constructor for an immutable parameter-map. 037 * 038 * @param parameter the parameter-provider 039 * @param valueFunction Function to return the value of a parameter 040 * @param namesSupplier Supplier to return all names of the parameter 041 */ 042 public ParamValuesMap(final P parameter, final Function<String, String[]> valueFunction, 043 final Supplier<Enumeration<String>> namesSupplier) { 044 045 super(parameter, valueFunction, namesSupplier); 046 } 047 048 /** 049 * Returns {@code true} if this parameter-map maps one or more keys 050 * to the specified value. 051 * 052 * @param value value whose presence in this parameter-map is to be 053 * tested 054 * 055 * @return {@code true} if this parameter-map maps one or more keys 056 * to the specified value 057 */ 058 @Override 059 public boolean containsValue(Object value) { 060 if (!(value instanceof String[])) { 061 return false; 062 } 063 064 final Enumeration<String> keys = getNamesSupplier().get(); 065 while (keys.hasMoreElements()) { 066 final String[] next = getValueFunction().apply(keys.nextElement()); 067 if (Objects.deepEquals(value, next)) { 068 return true; 069 } 070 } 071 return false; 072 } 073}