1 /* 2 * Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.jpackage.internal; 27 28 import java.util.Map; 29 import java.util.function.BiFunction; 30 import java.util.function.Function; 31 32 /** 33 * BundlerParamInfo<T> 34 * 35 * A BundlerParamInfo encapsulates an individual bundler parameter of type <T>. 36 */ 37 class BundlerParamInfo<T> { 38 39 /** 40 * The command line and hashmap name of the parameter 41 */ 42 String id; 43 44 /** 45 * Type of the parameter 46 */ 47 Class<T> valueType; 48 49 /** 50 * Indicates if value was set using default value function 51 */ 52 boolean isDefaultValue; 53 54 /** 55 * If the value is not set, and no fallback value is found, 56 * the parameter uses the value returned by the producer. 57 */ 58 Function<Map<String, ? super Object>, T> defaultValueFunction; 59 60 /** 61 * An optional string converter for command line arguments. 62 */ 63 BiFunction<String, Map<String, ? super Object>, T> stringConverter; 64 65 String getID() { 66 return id; 67 } 68 69 Class<T> getValueType() { 70 return valueType; 71 } 72 73 void setValueType(Class<T> valueType) { 74 this.valueType = valueType; 75 } 76 77 boolean getIsDefaultValue() { 78 return isDefaultValue; 79 } 80 81 Function<Map<String, ? super Object>, T> getDefaultValueFunction() { 82 return defaultValueFunction; 83 } 84 85 void setDefaultValueFunction( 86 Function<Map<String, ? super Object>, T> defaultValueFunction) { 87 this.defaultValueFunction = defaultValueFunction; 88 } 89 90 BiFunction<String, Map<String, ? super Object>,T> 91 getStringConverter() { 92 return stringConverter; 93 } 94 95 void setStringConverter(BiFunction<String, 96 Map<String, ? super Object>, T> stringConverter) { 97 this.stringConverter = stringConverter; 98 } 99 100 @SuppressWarnings("unchecked") 101 final T fetchFrom(Map<String, ? super Object> params) { 102 return fetchFrom(params, true); 103 } 104 105 @SuppressWarnings("unchecked") 106 final T fetchFrom(Map<String, ? super Object> params, 107 boolean invokeDefault) { 108 Object o = params.get(getID()); 109 if (o instanceof String && getStringConverter() != null) { 110 return getStringConverter().apply((String)o, params); 111 } 112 113 Class<T> klass = getValueType(); 114 if (klass.isInstance(o)) { 115 return (T) o; 116 } 117 if (o != null) { 118 throw new IllegalArgumentException("Param " + getID() 119 + " should be of type " + getValueType() 120 + " but is a " + o.getClass()); 121 } 122 if (params.containsKey(getID())) { 123 // explicit nulls are allowed 124 return null; 125 } 126 127 if (invokeDefault && (getDefaultValueFunction() != null)) { 128 T result = getDefaultValueFunction().apply(params); 129 if (result != null) { 130 params.put(getID(), result); 131 isDefaultValue = true; 132 } 133 return result; 134 } 135 136 // ultimate fallback 137 return null; 138 } 139 }