243 lines
11 KiB
Java
243 lines
11 KiB
Java
|
// 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
|
||
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
package com.google.protobuf;
|
||
|
|
|
||
|
|
import java.io.InputStream;
|
||
|
|
import java.nio.ByteBuffer;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Abstract interface for parsing Protocol Messages.
|
||
|
|
*
|
||
|
|
* <p>The implementation should be stateless and thread-safe.
|
||
|
|
*
|
||
|
|
* <p>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 liujisi@google.com (Pherl Liu)
|
||
|
|
*/
|
||
|
|
public interface Parser<MessageType> {
|
||
|
|
|
||
|
|
// 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.
|
||
|
|
*
|
||
|
|
* <p>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 <i>entire</i>
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* <p>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;
|
||
|
|
}
|