| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.johnzon.jsonb; |
| |
| import javax.json.bind.config.PropertyNamingStrategy; |
| import java.util.function.Function; |
| |
| public class PropertyNamingStrategyFactory { |
| private final Object value; |
| |
| public PropertyNamingStrategyFactory(final Object value) { |
| this.value = value; |
| } |
| |
| public PropertyNamingStrategy create() { |
| if (String.class.isInstance(value)) { |
| final String val = value.toString(); |
| switch (val) { |
| case PropertyNamingStrategy.IDENTITY: |
| return propertyName -> propertyName; |
| case PropertyNamingStrategy.LOWER_CASE_WITH_DASHES: |
| return new ConfigurableNamingStrategy(Character::toLowerCase, '-'); |
| case PropertyNamingStrategy.LOWER_CASE_WITH_UNDERSCORES: |
| return new ConfigurableNamingStrategy(Character::toLowerCase, '_'); |
| case PropertyNamingStrategy.UPPER_CAMEL_CASE: |
| return camelCaseStrategy(); |
| case PropertyNamingStrategy.UPPER_CAMEL_CASE_WITH_SPACES: |
| final PropertyNamingStrategy camelCase = camelCaseStrategy(); |
| final PropertyNamingStrategy space = new ConfigurableNamingStrategy(Function.identity(), ' '); |
| return propertyName -> camelCase.translateName(space.translateName(propertyName)); |
| case PropertyNamingStrategy.CASE_INSENSITIVE: |
| return propertyName -> propertyName; |
| default: |
| throw new IllegalArgumentException(val + " unknown as PropertyNamingStrategy"); |
| } |
| } |
| if (PropertyNamingStrategy.class.isInstance(value)) { |
| return PropertyNamingStrategy.class.cast(value); |
| } |
| throw new IllegalArgumentException(value + " not supported as PropertyNamingStrategy"); |
| } |
| |
| private PropertyNamingStrategy camelCaseStrategy() { |
| return propertyName -> Character.toUpperCase(propertyName.charAt(0)) + (propertyName.length() > 1 ? propertyName.substring(1) : ""); |
| } |
| |
| private static class ConfigurableNamingStrategy implements PropertyNamingStrategy { |
| private final Function<Character, Character> converter; |
| private final char separator; |
| |
| public ConfigurableNamingStrategy(final Function<Character, Character> wordConverter, final char sep) { |
| this.converter = wordConverter; |
| this.separator = sep; |
| } |
| |
| @Override |
| public String translateName(final String propertyName) { |
| final StringBuilder global = new StringBuilder(); |
| |
| final StringBuilder current = new StringBuilder(); |
| for (int i = 0; i < propertyName.length(); i++) { |
| final char c = propertyName.charAt(i); |
| if (Character.isUpperCase(c)) { |
| final char transformed = converter.apply(c); |
| if (current.length() > 0) { |
| global.append(current).append(separator); |
| current.setLength(0); |
| } |
| current.append(transformed); |
| } else { |
| current.append(c); |
| } |
| } |
| if (current.length() > 0) { |
| global.append(current); |
| } else { |
| global.setLength(global.length() - 1); // remove last sep |
| } |
| return global.toString(); |
| } |
| } |
| } |