ValueHandler.java revision 1870:4aa2e64eff30
1/* 2 * Copyright (c) 2015, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24package jdk.test.failurehandler.value; 25 26import jdk.test.failurehandler.Utils; 27 28import java.lang.reflect.Field; 29import java.lang.reflect.Modifier; 30import java.util.Objects; 31import java.util.Properties; 32 33public final class ValueHandler { 34 public static <T> void apply(T object, Properties properties, 35 String prefix) throws InvalidValueException { 36 Objects.requireNonNull(object, "object cannot be null"); 37 Objects.requireNonNull(properties, "properties cannot be null"); 38 Class<?> aClass = object.getClass(); 39 while (aClass != null) { 40 for (Field field : aClass.getDeclaredFields()) { 41 Value p = field.getAnnotation(Value.class); 42 if (p != null) { 43 applyToField(p, object, field, properties, prefix); 44 } else { 45 SubValues sub 46 = field.getAnnotation(SubValues.class); 47 if (sub != null) { 48 getAccess(field); 49 try { 50 apply(field.get(object), properties, 51 Utils.prependPrefix(prefix, sub.prefix())); 52 } catch (IllegalAccessException e) { 53 throw new InvalidValueException(String.format( 54 "can't apply sub properties to %s.", 55 field.getName())); 56 } 57 } 58 } 59 } 60 aClass = aClass.getSuperclass(); 61 } 62 } 63 64 private static void applyToField(Value property, Object object, 65 Field field, Properties properties, String prefix) 66 throws InvalidValueException { 67 getAccess(field); 68 if (Modifier.isFinal(field.getModifiers())) { 69 throw new InvalidValueException( 70 String.format("field '%s' is final", field)); 71 } 72 String name = Utils.prependPrefix(prefix, property.name()); 73 String value = getProperty(properties, prefix, property.name()); 74 if (value == null) { 75 DefaultValue defaultValue 76 = field.getAnnotation(DefaultValue.class); 77 value = defaultValue == null ? null : defaultValue.value(); 78 } 79 if (value == null) { 80 throw new InvalidValueException(String.format( 81 "can't set '%s', because properties don't have '%s'.", 82 field.getName(), name)); 83 } 84 String delimiter = getProperty(properties, 85 Utils.prependPrefix(prefix, property.name()), "delimiter"); 86 delimiter = delimiter == null ? " " : delimiter; 87 Class<? extends ValueParser> parserClass = property.parser(); 88 try { 89 field.set(object, parserClass.newInstance().parse( 90 field.getType(), value, delimiter)); 91 } catch (ReflectiveOperationException | IllegalArgumentException e) { 92 throw new InvalidValueException( 93 String.format("can't set field '%s' : %s", 94 field.getName(), e.getMessage()), e); 95 } 96 } 97 98 private static String getProperty(Properties properties, 99 String prefix, String name) { 100 if (prefix == null || prefix.isEmpty()) { 101 return properties.getProperty(name); 102 } 103 int index = prefix.length(); 104 do { 105 String value = properties.getProperty( 106 Utils.prependPrefix(prefix.substring(0, index), name)); 107 if (value != null) { 108 return value; 109 } 110 index = prefix.lastIndexOf('.', index - 1); 111 } while (index > 0); 112 return properties.getProperty(name); 113 } 114 115 private static void getAccess(Field field) { 116 int modifiers = field.getModifiers(); 117 if (!Modifier.isPublic(modifiers)) { 118 field.setAccessible(true); 119 } 120 } 121 122} 123