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135 lines
5.2 KiB
Objective-C
135 lines
5.2 KiB
Objective-C
// Copyright 2008 Cyrus Najmabadi
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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@protocol PBMessage;
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@protocol PBMessage_Builder;
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@class PBUnknownFieldSet;
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@class PBCodedInputStream;
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@class PBExtensionRegistry;
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/**
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* Abstract interface implemented by Protocol Message builders.
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*/
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@protocol PBMessage_Builder<NSObject>
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/** Resets all fields to their default values. */
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- (id<PBMessage_Builder>) clear;
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/**
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* Construct the final message. Once this is called, the Builder is no
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* longer valid, and calling any other method may throw a
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* NullPointerException. If you need to continue working with the builder
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* after calling {@code build()}, {@code clone()} it first.
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* @throws UninitializedMessageException The message is missing one or more
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* required fields (i.e. {@link #isInitialized()} returns false).
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* Use {@link #buildPartial()} to bypass this check.
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*/
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- (id<PBMessage>) build;
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/**
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* Like {@link #build()}, but does not throw an exception if the message
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* is missing required fields. Instead, a partial message is returned.
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*/
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- (id<PBMessage>) buildPartial;
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- (id<PBMessage_Builder>) clone;
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/**
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* Returns true if all required fields in the message and all embedded
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* messages are set, false otherwise.
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*/
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- (BOOL) isInitialized;
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/**
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* Get the message's type's default instance.
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* See {@link Message#getDefaultInstanceForType()}.
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*/
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- (id<PBMessage>) defaultInstance;
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- (PBUnknownFieldSet*) unknownFields;
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- (id<PBMessage_Builder>) setUnknownFields:(PBUnknownFieldSet*) unknownFields;
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/**
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* Merge some unknown fields into the {@link UnknownFieldSet} for this
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* message.
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*/
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- (id<PBMessage_Builder>) mergeUnknownFields:(PBUnknownFieldSet*) unknownFields;
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/**
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* Parses a message of this type from the input and merges it with this
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* message, as if using {@link Builder#mergeFrom(Message)}.
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*
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* <p>Warning: This does not verify that all required fields are present in
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* the input message. If you call {@link #build()} without setting all
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* required fields, it will throw an {@link UninitializedMessageException},
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* which is a {@code RuntimeException} and thus might not be caught. There
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* are a few good ways to deal with this:
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* <ul>
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* <li>Call {@link #isInitialized()} to verify that all required fields
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* are set before building.
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* <li>Parse the message separately using one of the static
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* {@code parseFrom} methods, then use {@link #mergeFrom(Message)}
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* to merge it with this one. {@code parseFrom} will throw an
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* {@link InvalidProtocolBufferException} (an {@code IOException})
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* if some required fields are missing.
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* <li>Use {@code buildPartial()} to build, which ignores missing
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* required fields.
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* </ul>
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*
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* <p>Note: The caller should call
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* {@link CodedInputStream#checkLastTagWas(int)} after calling this to
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* verify that the last tag seen was the appropriate end-group tag,
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* or zero for EOF.
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*/
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- (id<PBMessage_Builder>) mergeFromCodedInputStream:(PBCodedInputStream*) input;
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/**
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* Like {@link Builder#mergeFrom(CodedInputStream)}, but also
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* parses extensions. The extensions that you want to be able to parse
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* must be registered in {@code extensionRegistry}. Extensions not in
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* the registry will be treated as unknown fields.
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*/
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- (id<PBMessage_Builder>) mergeFromCodedInputStream:(PBCodedInputStream*) input extensionRegistry:(PBExtensionRegistry*) extensionRegistry;
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/**
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* Parse {@code data} as a message of this type and merge it with the
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* message being built. This is just a small wrapper around
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* {@link #mergeFrom(CodedInputStream)}.
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*/
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- (id<PBMessage_Builder>) mergeFromData:(NSData*) data;
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/**
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* Parse {@code data} as a message of this type and merge it with the
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* message being built. This is just a small wrapper around
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* {@link #mergeFrom(CodedInputStream,ExtensionRegistry)}.
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*/
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- (id<PBMessage_Builder>) mergeFromData:(NSData*) data extensionRegistry:(PBExtensionRegistry*) extensionRegistry;
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/**
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* Parse a message of this type from {@code input} and merge it with the
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* message being built. This is just a small wrapper around
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* {@link #mergeFrom(CodedInputStream)}. Note that this method always
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* reads the <i>entire</i> input (unless it throws an exception). If you
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* want it to stop earlier, you will need to wrap your input in some
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* wrapper stream that limits reading. Despite usually reading the entire
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* input, this does not close the stream.
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*/
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- (id<PBMessage_Builder>) mergeFromInputStream:(NSInputStream*) input;
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/**
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* Parse a message of this type from {@code input} and merge it with the
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* message being built. This is just a small wrapper around
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* {@link #mergeFrom(CodedInputStream,ExtensionRegistry)}.
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*/
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- (id<PBMessage_Builder>) mergeFromInputStream:(NSInputStream*) input extensionRegistry:(PBExtensionRegistry*) extensionRegistry;
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@end
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