1 // Protocol Buffers - Google's data interchange format 2 // Copyright 2008 Google Inc. All rights reserved. 3 // https://developers.google.com/protocol-buffers/ 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions are 7 // met: 8 // 9 // * Redistributions of source code must retain the above copyright 10 // notice, this list of conditions and the following disclaimer. 11 // * Redistributions in binary form must reproduce the above 12 // copyright notice, this list of conditions and the following disclaimer 13 // in the documentation and/or other materials provided with the 14 // distribution. 15 // * Neither the name of Google Inc. nor the names of its 16 // contributors may be used to endorse or promote products derived from 17 // this software without specific prior written permission. 18 // 19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31 package com.google.protobuf; 32 33 /** A factory for message info that is generated into the message itself. */ 34 @ExperimentalApi 35 class GeneratedMessageInfoFactory implements MessageInfoFactory { 36 37 private static final GeneratedMessageInfoFactory instance = new GeneratedMessageInfoFactory(); 38 39 // Disallow construction - it's a singleton. GeneratedMessageInfoFactory()40 private GeneratedMessageInfoFactory() {} 41 getInstance()42 public static GeneratedMessageInfoFactory getInstance() { 43 return instance; 44 } 45 46 @Override isSupported(Class<?> messageType)47 public boolean isSupported(Class<?> messageType) { 48 return GeneratedMessageLite.class.isAssignableFrom(messageType); 49 } 50 51 @Override messageInfoFor(Class<?> messageType)52 public MessageInfo messageInfoFor(Class<?> messageType) { 53 if (!GeneratedMessageLite.class.isAssignableFrom(messageType)) { 54 throw new IllegalArgumentException("Unsupported message type: " + messageType.getName()); 55 } 56 57 try { 58 return (MessageInfo) GeneratedMessageLite.getDefaultInstance( 59 messageType.asSubclass(GeneratedMessageLite.class)) 60 .buildMessageInfo(); 61 } catch (Exception e) { 62 throw new RuntimeException("Unable to get message info for " + messageType.getName(), e); 63 } 64 } 65 } 66