389 lines
13 KiB
Java
389 lines
13 KiB
Java
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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package com.google.protobuf;
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import java.io.IOException;
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import java.util.List;
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import java.util.Map;
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/** A reader of fields from a serialized protobuf message. */
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// TODO(nathanmittler): Refactor to allow the reader to allocate properly sized lists.
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@ExperimentalApi
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@CheckReturnValue
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interface Reader {
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/** Value used to indicate that the end of input has been reached. */
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int READ_DONE = Integer.MAX_VALUE;
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/** Value used to indicate that the reader does not know the tag about the field. */
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int TAG_UNKNOWN = 0;
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boolean shouldDiscardUnknownFields();
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/**
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* Gets the field number for the current field being read.
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*
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* <p>TODO(liujisi): Rename it to make it more explicit about the side effect on the underlying
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* buffer.
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*
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* @return the current field number or {@link #READ_DONE} if the end of input has been reached.
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*/
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int getFieldNumber() throws IOException;
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/**
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* Gets the wire tag of the current field.
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*
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* @return the current wire tag or {@link #TAG_UNKNOWN} if the reader does not know the tag of the
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* current field.
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*/
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int getTag();
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/**
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* Skips the current field and advances the reader to the next field.
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*
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* @return {@code true} if there are more fields or {@code false} if the end of input has been
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* reached.
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*/
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boolean skipField() throws IOException;
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/**
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* Reads and returns the next field of type {@code DOUBLE} and advances the reader to the next
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* field.
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*/
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double readDouble() throws IOException;
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/**
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* Reads and returns the next field of type {@code FLOAT} and advances the reader to the next
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* field.
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*/
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float readFloat() throws IOException;
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/**
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* Reads and returns the next field of type {@code UINT64} and advances the reader to the next
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* field.
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*/
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long readUInt64() throws IOException;
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/**
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* Reads and returns the next field of type {@code INT64} and advances the reader to the next
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* field.
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*/
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long readInt64() throws IOException;
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/**
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* Reads and returns the next field of type {@code INT32} and advances the reader to the next
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* field.
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*/
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int readInt32() throws IOException;
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/**
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* Reads and returns the next field of type {@code FIXED64} and advances the reader to the next
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* field.
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*/
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long readFixed64() throws IOException;
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/**
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* Reads and returns the next field of type {@code FIXED32} and advances the reader to the next
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* field.
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*/
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int readFixed32() throws IOException;
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/**
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* Reads and returns the next field of type {@code BOOL} and advances the reader to the next
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* field.
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*/
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boolean readBool() throws IOException;
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/**
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* Reads and returns the next field of type {@code STRING} and advances the reader to the next
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* field. If the stream contains malformed UTF-8, replace the offending bytes with the standard
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* UTF-8 replacement character.
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*/
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String readString() throws IOException;
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/**
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* Reads and returns the next field of type {@code STRING} and advances the reader to the next
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* field. If the stream contains malformed UTF-8, throw exception {@link
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* InvalidProtocolBufferException}.
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*/
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String readStringRequireUtf8() throws IOException;
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// TODO(yilunchong): the lack of other opinions for whether to expose this on the interface
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<T> T readMessageBySchemaWithCheck(Schema<T> schema, ExtensionRegistryLite extensionRegistry)
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throws IOException;
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/**
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* Reads and returns the next field of type {@code MESSAGE} and advances the reader to the next
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* field.
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*/
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<T> T readMessage(Class<T> clazz, ExtensionRegistryLite extensionRegistry) throws IOException;
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/**
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* Reads and returns the next field of type {@code GROUP} and advances the reader to the next
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* field.
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*
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* @deprecated groups fields are deprecated.
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*/
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@Deprecated
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<T> T readGroup(Class<T> clazz, ExtensionRegistryLite extensionRegistry) throws IOException;
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// TODO(yilunchong): the lack of other opinions for whether to expose this on the interface
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@Deprecated
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<T> T readGroupBySchemaWithCheck(Schema<T> schema, ExtensionRegistryLite extensionRegistry)
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throws IOException;
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/** Read a message field from the wire format and merge the results into the given target. */
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<T> void mergeMessageField(T target, Schema<T> schema, ExtensionRegistryLite extensionRegistry)
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throws IOException;
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/** Read a group field from the wire format and merge the results into the given target. */
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<T> void mergeGroupField(T target, Schema<T> schema, ExtensionRegistryLite extensionRegistry)
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throws IOException;
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/**
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* Reads and returns the next field of type {@code BYTES} and advances the reader to the next
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* field.
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*/
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ByteString readBytes() throws IOException;
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/**
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* Reads and returns the next field of type {@code UINT32} and advances the reader to the next
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* field.
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*/
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int readUInt32() throws IOException;
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/**
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* Reads and returns the next field of type {@code ENUM} and advances the reader to the next
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* field.
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*/
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int readEnum() throws IOException;
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/**
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* Reads and returns the next field of type {@code SFIXED32} and advances the reader to the next
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* field.
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*/
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int readSFixed32() throws IOException;
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/**
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* Reads and returns the next field of type {@code SFIXED64} and advances the reader to the next
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* field.
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*/
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long readSFixed64() throws IOException;
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/**
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* Reads and returns the next field of type {@code SINT32} and advances the reader to the next
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* field.
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*/
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int readSInt32() throws IOException;
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/**
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* Reads and returns the next field of type {@code SINT64} and advances the reader to the next
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* field.
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*/
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long readSInt64() throws IOException;
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/**
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* Reads the next field of type {@code DOUBLE_LIST} or {@code DOUBLE_LIST_PACKED} and advances the
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* reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readDoubleList(List<Double> target) throws IOException;
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/**
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* Reads the next field of type {@code FLOAT_LIST} or {@code FLOAT_LIST_PACKED} and advances the
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* reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readFloatList(List<Float> target) throws IOException;
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/**
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* Reads the next field of type {@code UINT64_LIST} or {@code UINT64_LIST_PACKED} and advances the
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* reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readUInt64List(List<Long> target) throws IOException;
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/**
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* Reads the next field of type {@code INT64_LIST} or {@code INT64_LIST_PACKED} and advances the
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* reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readInt64List(List<Long> target) throws IOException;
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/**
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* Reads the next field of type {@code INT32_LIST} or {@code INT32_LIST_PACKED} and advances the
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* reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readInt32List(List<Integer> target) throws IOException;
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/**
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* Reads the next field of type {@code FIXED64_LIST} or {@code FIXED64_LIST_PACKED} and advances
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* the reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readFixed64List(List<Long> target) throws IOException;
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/**
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* Reads the next field of type {@code FIXED32_LIST} or {@code FIXED32_LIST_PACKED} and advances
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* the reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readFixed32List(List<Integer> target) throws IOException;
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/**
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* Reads the next field of type {@code BOOL_LIST} or {@code BOOL_LIST_PACKED} and advances the
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* reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readBoolList(List<Boolean> target) throws IOException;
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/**
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* Reads the next field of type {@code STRING_LIST} and advances the reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readStringList(List<String> target) throws IOException;
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/**
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* Reads the next field of type {@code STRING_LIST} and advances the reader to the next field. If
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* the stream contains malformed UTF-8, throw exception {@link InvalidProtocolBufferException}.
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*
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* @param target the list that will receive the read values.
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*/
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void readStringListRequireUtf8(List<String> target) throws IOException;
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/**
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* Reads the next field of type {@code MESSAGE_LIST} and advances the reader to the next field.
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*
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* @param target the list that will receive the read values.
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* @param targetType the type of the elements stored in the {@code target} list.
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*/
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<T> void readMessageList(
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List<T> target, Schema<T> schema, ExtensionRegistryLite extensionRegistry) throws IOException;
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<T> void readMessageList(
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List<T> target, Class<T> targetType, ExtensionRegistryLite extensionRegistry)
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throws IOException;
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/**
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* Reads the next field of type {@code GROUP_LIST} and advances the reader to the next field.
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*
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* @param target the list that will receive the read values.
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* @param targetType the type of the elements stored in the {@code target} list.
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* @deprecated groups fields are deprecated.
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*/
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@Deprecated
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<T> void readGroupList(
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List<T> target, Class<T> targetType, ExtensionRegistryLite extensionRegistry)
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throws IOException;
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@Deprecated
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<T> void readGroupList(
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List<T> target, Schema<T> targetType, ExtensionRegistryLite extensionRegistry)
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throws IOException;
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/**
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* Reads the next field of type {@code BYTES_LIST} and advances the reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readBytesList(List<ByteString> target) throws IOException;
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/**
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* Reads the next field of type {@code UINT32_LIST} or {@code UINT32_LIST_PACKED} and advances the
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* reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readUInt32List(List<Integer> target) throws IOException;
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/**
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* Reads the next field of type {@code ENUM_LIST} or {@code ENUM_LIST_PACKED} and advances the
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* reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readEnumList(List<Integer> target) throws IOException;
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/**
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* Reads the next field of type {@code SFIXED32_LIST} or {@code SFIXED32_LIST_PACKED} and advances
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* the reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readSFixed32List(List<Integer> target) throws IOException;
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/**
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* Reads the next field of type {@code SFIXED64_LIST} or {@code SFIXED64_LIST_PACKED} and advances
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* the reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readSFixed64List(List<Long> target) throws IOException;
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/**
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* Reads the next field of type {@code SINT32_LIST} or {@code SINT32_LIST_PACKED} and advances the
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* reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readSInt32List(List<Integer> target) throws IOException;
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/**
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* Reads the next field of type {@code SINT64_LIST} or {@code SINT64_LIST_PACKED} and advances the
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* reader to the next field.
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*
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* @param target the list that will receive the read values.
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*/
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void readSInt64List(List<Long> target) throws IOException;
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/**
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* Reads the next field of type {@code MAP} and advances the reader to the next field.
|
||
|
|
*
|
||
|
|
* @param target the mutable map that will receive the read values.
|
||
|
|
* @param mapDefaultEntry the default entry of the map field.
|
||
|
|
* @param extensionRegistry the extension registry for parsing message value fields.
|
||
|
|
*/
|
||
|
|
<K, V> void readMap(
|
||
|
|
Map<K, V> target,
|
||
|
|
MapEntryLite.Metadata<K, V> mapDefaultEntry,
|
||
|
|
ExtensionRegistryLite extensionRegistry)
|
||
|
|
throws IOException;
|
||
|
|
}
|