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='bcode w800'> 025 * // Produces 'number', not 'NUMBER'. 026 * String json = JsonSerializer.DEFAULT.serialize(JsonType.NUMBER); 027 * </p> 028 * 029 * <ul class='seealso'> 030 * <li class='jp'>{@doc package-summary.html#TOC org.apache.juneau.dto.jsonschema} 031 * </ul> 032 */ 033public enum JsonType { 034 035 /** array */ 036 ARRAY("array"), 037 038 /** boolean */ 039 BOOLEAN("boolean"), 040 041 /** integer */ 042 INTEGER("integer"), 043 044 /** null */ 045 NULL("null"), 046 047 /** number */ 048 NUMBER("number"), 049 050 /** object */ 051 OBJECT("object"), 052 053 /** string */ 054 STRING("string"), 055 056 /** any */ 057 ANY("any"); 058 059 private final String value; // The serialized format of the enum. 060 061 private JsonType(String value) { 062 this.value = value; 063 } 064 065 /** 066 * Returns the lowercase form of this enum that's compatible with the JSON-Schema specification. 067 */ 068 @Override /* Object */ 069 public String toString() { 070 return value; 071 } 072 073 /** 074 * Converts the specified lowercase form of the enum back into an <c>Enum</c>. 075 * 076 * @param value The lowercase form of the enum (e.g. <js>"array"</js>). 077 * @return The matching <c>Enum</c>, or <jk>null</jk> if no match found. 078 */ 079 public static JsonType fromString(String value) { 080 if (value == null || value.length() < 4) 081 return null; 082 char c = value.charAt(0); 083 if (c == 'a') { 084 if (value.equals("array")) 085 return ARRAY; 086 if (value.equals("any")) 087 return ANY; 088 } 089 if (c == 'b' && value.equals("boolean")) 090 return BOOLEAN; 091 if (c == 'i' && value.equals("integer")) 092 return INTEGER; 093 if (c == 'n') { 094 c = value.charAt(2); 095 if (c == 'l' && value.equals("null")) 096 return NULL; 097 if (c == 'm' && value.equals("number")) 098 return NUMBER; 099 return null; 100 } 101 if (c == 'o' && value.equals("object")) 102 return OBJECT; 103 if (c == 's' && value.equals("string")) 104 return STRING; 105 return null; 106 } 107}