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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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package com.google.protobuf;

import java.io.InputStream;
import java.nio.ByteBuffer;

/**
 * Abstract interface for parsing Protocol Messages.
 *
 * 

The implementation should be stateless and thread-safe. * *

All methods may throw {@link InvalidProtocolBufferException}. In the event of invalid data, * like an encoding error, the cause of the thrown exception will be {@code null}. However, if an * I/O problem occurs, an exception is thrown with an {@link java.io.IOException} cause. * * @author [email protected] (Pherl Liu) */ public interface Parser { // NB(jh): Other parts of the protobuf API that parse messages distinguish between an I/O problem // (like failure reading bytes from a socket) and invalid data (encoding error) via the type of // thrown exception. But it would be source-incompatible to make the methods in this interface do // so since they were originally spec'ed to only throw InvalidProtocolBufferException. So callers // must inspect the cause of the exception to distinguish these two cases. /** * Parses a message of {@code MessageType} from the input. * *

Note: The caller should call {@link CodedInputStream#checkLastTagWas(int)} after calling * this to verify that the last tag seen was the appropriate end-group tag, or zero for EOF. */ public MessageType parseFrom(CodedInputStream input) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(CodedInputStream)}, but also parses extensions. The extensions that you * want to be able to parse must be registered in {@code extensionRegistry}. Extensions not in the * registry will be treated as unknown fields. */ public MessageType parseFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(CodedInputStream)}, but does not throw an exception if the message is * missing required fields. Instead, a partial message is returned. */ public MessageType parsePartialFrom(CodedInputStream input) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(CodedInputStream input, ExtensionRegistryLite)}, but does not throw an * exception if the message is missing required fields. Instead, a partial message is returned. */ public MessageType parsePartialFrom( CodedInputStream input, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; // --------------------------------------------------------------- // Convenience methods. /** * Parses {@code data} as a message of {@code MessageType}. This is just a small wrapper around * {@link #parseFrom(CodedInputStream)}. */ public MessageType parseFrom(ByteBuffer data) throws InvalidProtocolBufferException; /** * Parses {@code data} as a message of {@code MessageType}. This is just a small wrapper around * {@link #parseFrom(CodedInputStream, ExtensionRegistryLite)}. */ public MessageType parseFrom(ByteBuffer data, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; /** * Parses {@code data} as a message of {@code MessageType}. This is just a small wrapper around * {@link #parseFrom(CodedInputStream)}. */ public MessageType parseFrom(ByteString data) throws InvalidProtocolBufferException; /** * Parses {@code data} as a message of {@code MessageType}. This is just a small wrapper around * {@link #parseFrom(CodedInputStream, ExtensionRegistryLite)}. */ public MessageType parseFrom(ByteString data, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(ByteString)}, but does not throw an exception if the message is missing * required fields. Instead, a partial message is returned. */ public MessageType parsePartialFrom(ByteString data) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(ByteString, ExtensionRegistryLite)}, but does not throw an exception if * the message is missing required fields. Instead, a partial message is returned. */ public MessageType parsePartialFrom(ByteString data, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; /** * Parses {@code data} as a message of {@code MessageType}. This is just a small wrapper around * {@link #parseFrom(CodedInputStream)}. */ public MessageType parseFrom(byte[] data, int off, int len) throws InvalidProtocolBufferException; /** * Parses {@code data} as a message of {@code MessageType}. This is just a small wrapper around * {@link #parseFrom(CodedInputStream, ExtensionRegistryLite)}. */ public MessageType parseFrom( byte[] data, int off, int len, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; /** * Parses {@code data} as a message of {@code MessageType}. This is just a small wrapper around * {@link #parseFrom(CodedInputStream)}. */ public MessageType parseFrom(byte[] data) throws InvalidProtocolBufferException; /** * Parses {@code data} as a message of {@code MessageType}. This is just a small wrapper around * {@link #parseFrom(CodedInputStream, ExtensionRegistryLite)}. */ public MessageType parseFrom(byte[] data, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(byte[], int, int)}, but does not throw an exception if the message is * missing required fields. Instead, a partial message is returned. */ public MessageType parsePartialFrom(byte[] data, int off, int len) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(ByteString, ExtensionRegistryLite)}, but does not throw an exception if * the message is missing required fields. Instead, a partial message is returned. */ public MessageType parsePartialFrom( byte[] data, int off, int len, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(byte[])}, but does not throw an exception if the message is missing * required fields. Instead, a partial message is returned. */ public MessageType parsePartialFrom(byte[] data) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(byte[], ExtensionRegistryLite)}, but does not throw an exception if the * message is missing required fields. Instead, a partial message is returned. */ public MessageType parsePartialFrom(byte[] data, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; /** * Parse a message of {@code MessageType} from {@code input}. This is just a small wrapper around * {@link #parseFrom(CodedInputStream)}. Note that this method always reads the entire * input (unless it throws an exception). If you want it to stop earlier, you will need to wrap * your input in some wrapper stream that limits reading. Or, use {@link * MessageLite#writeDelimitedTo(java.io.OutputStream)} to write your message and {@link * #parseDelimitedFrom(InputStream)} to read it. * *

Despite usually reading the entire input, this does not close the stream. */ public MessageType parseFrom(InputStream input) throws InvalidProtocolBufferException; /** * Parses a message of {@code MessageType} from {@code input}. This is just a small wrapper around * {@link #parseFrom(CodedInputStream, ExtensionRegistryLite)}. */ public MessageType parseFrom(InputStream input, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(InputStream)}, but does not throw an exception if the message is missing * required fields. Instead, a partial message is returned. */ public MessageType parsePartialFrom(InputStream input) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(InputStream, ExtensionRegistryLite)}, but does not throw an exception if * the message is missing required fields. Instead, a partial message is returned. */ public MessageType parsePartialFrom(InputStream input, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; /** * Like {@link #parseFrom(InputStream)}, but does not read until EOF. Instead, the size of message * (encoded as a varint) is read first, then the message data. Use {@link * MessageLite#writeDelimitedTo(java.io.OutputStream)} to write messages in this format. * * @return Parsed message if successful, or null if the stream is at EOF when the method starts. * Any other error (including reaching EOF during parsing) will cause an exception to be * thrown. */ public MessageType parseDelimitedFrom(InputStream input) throws InvalidProtocolBufferException; /** Like {@link #parseDelimitedFrom(InputStream)} but supporting extensions. */ public MessageType parseDelimitedFrom(InputStream input, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; /** * Like {@link #parseDelimitedFrom(InputStream)}, but does not throw an exception if the message * is missing required fields. Instead, a partial message is returned. */ public MessageType parsePartialDelimitedFrom(InputStream input) throws InvalidProtocolBufferException; /** * Like {@link #parseDelimitedFrom(InputStream, ExtensionRegistryLite)}, but does not throw an * exception if the message is missing required fields. Instead, a partial message is returned. */ public MessageType parsePartialDelimitedFrom( InputStream input, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException; }





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