001// *************************************************************************************************************************** 002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file * 003// * distributed with this work for additional information regarding copyright ownership. The ASF licenses this file * 004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance * 005// * with the License. You may obtain a copy of the License at * 006// * * 007// * http://www.apache.org/licenses/LICENSE-2.0 * 008// * * 009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an * 010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the * 011// * specific language governing permissions and limitations under the License. * 012// *************************************************************************************************************************** 013package org.apache.juneau.dto.jsonschema; 014 015/** 016 * Represents possible JSON types in the JSON-Schema core specification. 017 * 018 * <p> 019 * Implements custom <c>toString()</c> and <c>fromString(String)</c> methods that override the default 020 * serialization/parsing behavior of <c>Enum</c> types so that they are represented in lowercase form (as per the 021 * specification). 022 * 023 * <h5 class='section'>Example:</h5> 024 * <p class='bjava'> 025 * <jc>// Produces 'number', not 'NUMBER'.</jc> 026 * String <jv>json</jv> = JsonSerializer.<jsf>DEFAULT</jsf>.serialize(JsonType.<jsf>NUMBER</jsf>); 027 * </p> 028 */ 029public enum JsonType { 030 031 /** array */ 032 ARRAY("array"), 033 034 /** boolean */ 035 BOOLEAN("boolean"), 036 037 /** integer */ 038 INTEGER("integer"), 039 040 /** null */ 041 NULL("null"), 042 043 /** number */ 044 NUMBER("number"), 045 046 /** object */ 047 OBJECT("object"), 048 049 /** string */ 050 STRING("string"), 051 052 /** any */ 053 ANY("any"); 054 055 private final String value; // The serialized format of the enum. 056 057 private JsonType(String value) { 058 this.value = value; 059 } 060 061 /** 062 * Returns the lowercase form of this enum that's compatible with the JSON-Schema specification. 063 */ 064 @Override /* Object */ 065 public String toString() { 066 return value; 067 } 068 069 /** 070 * Converts the specified lowercase form of the enum back into an <c>Enum</c>. 071 * 072 * @param value The lowercase form of the enum (e.g. <js>"array"</js>). 073 * @return The matching <c>Enum</c>, or <jk>null</jk> if no match found. 074 */ 075 public static JsonType fromString(String value) { 076 if (value == null || value.length() < 4) 077 return null; 078 char c = value.charAt(0); 079 if (c == 'a') { 080 if (value.equals("array")) 081 return ARRAY; 082 if (value.equals("any")) 083 return ANY; 084 } 085 if (c == 'b' && value.equals("boolean")) 086 return BOOLEAN; 087 if (c == 'i' && value.equals("integer")) 088 return INTEGER; 089 if (c == 'n') { 090 c = value.charAt(2); 091 if (c == 'l' && value.equals("null")) 092 return NULL; 093 if (c == 'm' && value.equals("number")) 094 return NUMBER; 095 return null; 096 } 097 if (c == 'o' && value.equals("object")) 098 return OBJECT; 099 if (c == 's' && value.equals("string")) 100 return STRING; 101 return null; 102 } 103}