com.google.protobuf.GeneratedMessageLite Maven / Gradle / Ivy
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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
package com.google.protobuf;
import com.google.protobuf.AbstractMessageLite.Builder.LimitedInputStream;
import com.google.protobuf.Internal.BooleanList;
import com.google.protobuf.Internal.DoubleList;
import com.google.protobuf.Internal.FloatList;
import com.google.protobuf.Internal.IntList;
import com.google.protobuf.Internal.LongList;
import com.google.protobuf.Internal.ProtobufList;
import com.google.protobuf.WireFormat.FieldType;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectStreamException;
import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* Lite version of {@link GeneratedMessage}.
*
* @author [email protected] Kenton Varda
*/
public abstract class GeneratedMessageLite<
MessageType extends GeneratedMessageLite,
BuilderType extends GeneratedMessageLite.Builder>
extends AbstractMessageLite {
/* For use by lite runtime only */
static final int UNINITIALIZED_SERIALIZED_SIZE = 0x7FFFFFFF;
private static final int MUTABLE_FLAG_MASK = 0x80000000;
private static final int MEMOIZED_SERIALIZED_SIZE_MASK = 0x7FFFFFFF;
/**
* We use the high bit of memoizedSerializedSize as the explicit mutability flag. It didn't make
* sense to have negative sizes anyway. Messages start as mutable.
*
* Adding a standalone boolean would have added 8 bytes to every message instance.
*
*
We also reserve 0x7FFFFFFF as the "uninitialized" value.
*/
private int memoizedSerializedSize = MUTABLE_FLAG_MASK | UNINITIALIZED_SERIALIZED_SIZE;
/* For use by the runtime only */
static final int UNINITIALIZED_HASH_CODE = 0;
/** For use by generated code only. Lazily initialized to reduce allocations. */
protected UnknownFieldSetLite unknownFields = UnknownFieldSetLite.getDefaultInstance();
boolean isMutable() {
return (memoizedSerializedSize & MUTABLE_FLAG_MASK) != 0;
}
void markImmutable() {
memoizedSerializedSize &= ~MUTABLE_FLAG_MASK;
}
int getMemoizedHashCode() {
return memoizedHashCode;
}
void setMemoizedHashCode(int value) {
memoizedHashCode = value;
}
void clearMemoizedHashCode() {
memoizedHashCode = UNINITIALIZED_HASH_CODE;
}
boolean hashCodeIsNotMemoized() {
return UNINITIALIZED_HASH_CODE == getMemoizedHashCode();
}
@Override
@SuppressWarnings("unchecked") // Guaranteed by runtime.
public final Parser getParserForType() {
return (Parser) dynamicMethod(MethodToInvoke.GET_PARSER);
}
@Override
@SuppressWarnings("unchecked") // Guaranteed by runtime.
public final MessageType getDefaultInstanceForType() {
return (MessageType) dynamicMethod(MethodToInvoke.GET_DEFAULT_INSTANCE);
}
@Override
@SuppressWarnings("unchecked") // Guaranteed by runtime.
public final BuilderType newBuilderForType() {
return (BuilderType) dynamicMethod(MethodToInvoke.NEW_BUILDER);
}
MessageType newMutableInstance() {
return (MessageType) dynamicMethod(MethodToInvoke.NEW_MUTABLE_INSTANCE);
}
/**
* A reflective toString function. This is primarily intended as a developer aid, while keeping
* binary size down. The first line of the {@code toString()} representation includes a commented
* version of {@code super.toString()} to act as an indicator that this should not be relied on
* for comparisons.
*
* NOTE: This method relies on the field getter methods not being stripped or renamed by
* proguard. If they are, the fields will not be included in the returned string representation.
*
*
NOTE: This implementation is liable to change in the future, and should not be relied on in
* code.
*/
@Override
public String toString() {
return MessageLiteToString.toString(this, super.toString());
}
@Override
public int hashCode() {
if (isMutable()) {
return computeHashCode();
}
if (hashCodeIsNotMemoized()) {
setMemoizedHashCode(computeHashCode());
}
return getMemoizedHashCode();
}
int computeHashCode() {
return Protobuf.getInstance().schemaFor(this).hashCode(this);
}
@SuppressWarnings("unchecked") // Guaranteed by isInstance + runtime
@Override
public boolean equals(
Object other) {
if (this == other) {
return true;
}
if (other == null) {
return false;
}
if (this.getClass() != other.getClass()) {
return false;
}
return Protobuf.getInstance().schemaFor(this).equals(this, (MessageType) other);
}
// The general strategy for unknown fields is to use an UnknownFieldSetLite that is treated as
// mutable during the parsing constructor and immutable after. This allows us to avoid
// any unnecessary intermediary allocations while reducing the generated code size.
/** Lazily initializes unknown fields. */
private void ensureUnknownFieldsInitialized() {
if (unknownFields == UnknownFieldSetLite.getDefaultInstance()) {
unknownFields = UnknownFieldSetLite.newInstance();
}
}
/**
* Called by subclasses to parse an unknown field. For use by generated code only.
*
* @return {@code true} unless the tag is an end-group tag.
*/
protected boolean parseUnknownField(int tag, CodedInputStream input) throws IOException {
// This will avoid the allocation of unknown fields when a group tag is encountered.
if (WireFormat.getTagWireType(tag) == WireFormat.WIRETYPE_END_GROUP) {
return false;
}
ensureUnknownFieldsInitialized();
return unknownFields.mergeFieldFrom(tag, input);
}
/** Called by subclasses to parse an unknown field. For use by generated code only. */
protected void mergeVarintField(int tag, int value) {
ensureUnknownFieldsInitialized();
unknownFields.mergeVarintField(tag, value);
}
/** Called by subclasses to parse an unknown field. For use by generated code only. */
protected void mergeLengthDelimitedField(int fieldNumber, ByteString value) {
ensureUnknownFieldsInitialized();
unknownFields.mergeLengthDelimitedField(fieldNumber, value);
}
/** Called by subclasses to complete parsing. For use by generated code only. */
protected void makeImmutable() {
Protobuf.getInstance().schemaFor(this).makeImmutable(this);
markImmutable();
}
protected final <
MessageType extends GeneratedMessageLite,
BuilderType extends GeneratedMessageLite.Builder>
BuilderType createBuilder() {
return (BuilderType) dynamicMethod(MethodToInvoke.NEW_BUILDER);
}
protected final <
MessageType extends GeneratedMessageLite,
BuilderType extends GeneratedMessageLite.Builder>
BuilderType createBuilder(MessageType prototype) {
return ((BuilderType) createBuilder()).mergeFrom(prototype);
}
@Override
public final boolean isInitialized() {
return isInitialized((MessageType) this, /* shouldMemoize= */ true);
}
@Override
@SuppressWarnings("unchecked")
public final BuilderType toBuilder() {
BuilderType builder = (BuilderType) dynamicMethod(MethodToInvoke.NEW_BUILDER);
return builder.mergeFrom((MessageType) this);
}
/**
* Defines which method path to invoke in {@link GeneratedMessageLite
* #dynamicMethod(MethodToInvoke, Object...)}.
*
* For use by generated code only.
*/
public static enum MethodToInvoke {
// Rely on/modify instance state
GET_MEMOIZED_IS_INITIALIZED,
SET_MEMOIZED_IS_INITIALIZED,
// Rely on static state
BUILD_MESSAGE_INFO,
NEW_MUTABLE_INSTANCE,
NEW_BUILDER,
GET_DEFAULT_INSTANCE,
GET_PARSER;
}
/**
* A method that implements different types of operations described in {@link MethodToInvoke}.
* These different kinds of operations are required to implement message-level operations for
* builders in the runtime. This method bundles those operations to reduce the generated methods
* count.
*
*
* - {@code NEW_INSTANCE} returns a new instance of the protocol buffer that has not yet been
* made immutable. See {@code MAKE_IMMUTABLE}.
*
- {@code IS_INITIALIZED} returns {@code null} for false and the default instance for true.
* It doesn't use or modify any memoized value.
*
- {@code GET_MEMOIZED_IS_INITIALIZED} returns the memoized {@code isInitialized} byte
* value.
*
- {@code SET_MEMOIZED_IS_INITIALIZED} sets the memoized {@code isInitialized} byte value to
* 1 if the first parameter is not null, or to 0 if the first parameter is null.
*
- {@code NEW_BUILDER} returns a {@code BuilderType} instance.
*
*
* This method, plus the implementation of the Builder, enables the Builder class to be proguarded
* away entirely on Android.
*
* For use by generated code only.
*/
protected abstract Object dynamicMethod(
MethodToInvoke method,
Object arg0,
Object arg1);
/** Same as {@link #dynamicMethod(MethodToInvoke, Object, Object)} with {@code null} padding. */
@CanIgnoreReturnValue
protected Object dynamicMethod(
MethodToInvoke method,
Object arg0) {
return dynamicMethod(method, arg0, null);
}
/** Same as {@link #dynamicMethod(MethodToInvoke, Object, Object)} with {@code null} padding. */
protected Object dynamicMethod(MethodToInvoke method) {
return dynamicMethod(method, null, null);
}
void clearMemoizedSerializedSize() {
setMemoizedSerializedSize(UNINITIALIZED_SERIALIZED_SIZE);
}
@Override
int getMemoizedSerializedSize() {
return memoizedSerializedSize & MEMOIZED_SERIALIZED_SIZE_MASK;
}
@Override
void setMemoizedSerializedSize(int size) {
if (size < 0) {
throw new IllegalStateException("serialized size must be non-negative, was " + size);
}
memoizedSerializedSize =
(memoizedSerializedSize & MUTABLE_FLAG_MASK) | (size & MEMOIZED_SERIALIZED_SIZE_MASK);
}
@Override
public void writeTo(CodedOutputStream output) throws IOException {
Protobuf.getInstance()
.schemaFor(this)
.writeTo(this, CodedOutputStreamWriter.forCodedOutput(output));
}
@Override
int getSerializedSize(
Schema schema) {
if (isMutable()) {
// The serialized size should never be memoized for mutable instances.
int size = computeSerializedSize(schema);
if (size < 0) {
throw new IllegalStateException("serialized size must be non-negative, was " + size);
}
return size;
}
// If memoizedSerializedSize has already been set, return it.
if (getMemoizedSerializedSize() != UNINITIALIZED_SERIALIZED_SIZE) {
return getMemoizedSerializedSize();
}
// Need to compute and memoize the serialized size.
int size = computeSerializedSize(schema);
setMemoizedSerializedSize(size);
return size;
}
@Override
public int getSerializedSize() {
// Calling this with 'null' to delay schema lookup in case the serializedSize is already
// memoized.
return getSerializedSize(null);
}
private int computeSerializedSize(
Schema nullableSchema) {
if (nullableSchema == null) {
return Protobuf.getInstance().schemaFor(this).getSerializedSize(this);
} else {
return ((Schema>) nullableSchema)
.getSerializedSize(this);
}
}
/** Constructs a {@link MessageInfo} for this message type. */
Object buildMessageInfo() throws Exception {
return dynamicMethod(MethodToInvoke.BUILD_MESSAGE_INFO);
}
private static Map, GeneratedMessageLite> defaultInstanceMap =
new ConcurrentHashMap<>();
@SuppressWarnings("unchecked")
static > T getDefaultInstance(Class clazz) {
T result = (T) defaultInstanceMap.get(clazz);
if (result == null) {
// Foo.class does not initialize the class so we need to force the initialization in order to
// get the default instance registered.
try {
Class.forName(clazz.getName(), true, clazz.getClassLoader());
} catch (ClassNotFoundException e) {
throw new IllegalStateException("Class initialization cannot fail.", e);
}
result = (T) defaultInstanceMap.get(clazz);
}
if (result == null) {
// On some Samsung devices, this still doesn't return a valid value for some reason. We add a
// reflective fallback to keep the device running. See b/114675342.
result = (T) UnsafeUtil.allocateInstance(clazz).getDefaultInstanceForType();
// A sanity check to ensure that was actually invoked.
if (result == null) {
throw new IllegalStateException();
}
defaultInstanceMap.put(clazz, result);
}
return result;
}
protected static > void registerDefaultInstance(
Class clazz, T defaultInstance) {
// Default instances must be immutable.
// Marking immutable here to avoid extra bytecode in every generated message class.
// Only calling "markImmutable" rather than "makeImmutable" because for Default Instances:
// 1. All sub-messages are initialized to null / default instances and thus immutable
// 2. All lists are initialized to default instance empty lists which are also immutable.
defaultInstance.markImmutable();
defaultInstanceMap.put(clazz, defaultInstance);
}
protected static Object newMessageInfo(
MessageLite defaultInstance, String info, Object[] objects) {
return new RawMessageInfo(defaultInstance, info, objects);
}
/**
* Merge some unknown fields into the {@link UnknownFieldSetLite} for this message.
*
* For use by generated code only.
*/
protected final void mergeUnknownFields(UnknownFieldSetLite unknownFields) {
this.unknownFields = UnknownFieldSetLite.mutableCopyOf(this.unknownFields, unknownFields);
}
@SuppressWarnings("unchecked")
public abstract static class Builder<
MessageType extends GeneratedMessageLite,
BuilderType extends Builder>
extends AbstractMessageLite.Builder {
private final MessageType defaultInstance;
protected MessageType instance;
protected Builder(MessageType defaultInstance) {
this.defaultInstance = defaultInstance;
if (defaultInstance.isMutable()) {
throw new IllegalArgumentException("Default instance must be immutable.");
}
// this.instance should be set to defaultInstance but some tests rely on newBuilder().build()
// creating unique instances.
this.instance = newMutableInstance();
}
private MessageType newMutableInstance() {
return defaultInstance.newMutableInstance();
}
/**
* Called before any method that would mutate the builder to ensure that it correctly copies any
* state before the write happens to preserve immutability guarantees.
*/
protected final void copyOnWrite() {
if (!instance.isMutable()) {
copyOnWriteInternal();
}
}
protected void copyOnWriteInternal() {
MessageType newInstance = newMutableInstance();
mergeFromInstance(newInstance, instance);
instance = newInstance;
}
@Override
public final boolean isInitialized() {
return GeneratedMessageLite.isInitialized(instance, /* shouldMemoize= */ false);
}
@Override
public final BuilderType clear() {
// No need to copy on write since we're dropping the instance anyway.
if (defaultInstance.isMutable()) {
throw new IllegalArgumentException("Default instance must be immutable.");
}
instance = newMutableInstance(); // should be defaultInstance;
return (BuilderType) this;
}
@Override
public BuilderType clone() {
BuilderType builder = (BuilderType) getDefaultInstanceForType().newBuilderForType();
builder.instance = buildPartial();
return builder;
}
@Override
public MessageType buildPartial() {
if (!instance.isMutable()) {
return instance;
}
instance.makeImmutable();
return instance;
}
@Override
public final MessageType build() {
MessageType result = buildPartial();
if (!result.isInitialized()) {
throw newUninitializedMessageException(result);
}
return result;
}
@Override
protected BuilderType internalMergeFrom(MessageType message) {
return mergeFrom(message);
}
/** All subclasses implement this. */
public BuilderType mergeFrom(MessageType message) {
if (getDefaultInstanceForType().equals(message)) {
return (BuilderType) this;
}
copyOnWrite();
mergeFromInstance(instance, message);
return (BuilderType) this;
}
private static void mergeFromInstance(MessageType dest, MessageType src) {
Protobuf.getInstance().schemaFor(dest).mergeFrom(dest, src);
}
@Override
public MessageType getDefaultInstanceForType() {
return defaultInstance;
}
@Override
public BuilderType mergeFrom(
byte[] input, int offset, int length, ExtensionRegistryLite extensionRegistry)
throws InvalidProtocolBufferException {
copyOnWrite();
try {
Protobuf.getInstance().schemaFor(instance).mergeFrom(
instance, input, offset, offset + length,
new ArrayDecoders.Registers(extensionRegistry));
} catch (InvalidProtocolBufferException e) {
throw e;
} catch (IndexOutOfBoundsException e) {
throw InvalidProtocolBufferException.truncatedMessage();
} catch (IOException e) {
throw new RuntimeException("Reading from byte array should not throw IOException.", e);
}
return (BuilderType) this;
}
@Override
public BuilderType mergeFrom(
byte[] input, int offset, int length)
throws InvalidProtocolBufferException {
return mergeFrom(input, offset, length, ExtensionRegistryLite.getEmptyRegistry());
}
@Override
public BuilderType mergeFrom(
com.google.protobuf.CodedInputStream input,
com.google.protobuf.ExtensionRegistryLite extensionRegistry)
throws IOException {
copyOnWrite();
try {
// TODO: Try to make input with type CodedInputStream.ArrayDecoder use
// fast path.
Protobuf.getInstance().schemaFor(instance).mergeFrom(
instance, CodedInputStreamReader.forCodedInput(input), extensionRegistry);
} catch (RuntimeException e) {
if (e.getCause() instanceof IOException) {
throw (IOException) e.getCause();
}
throw e;
}
return (BuilderType) this;
}
}
// =================================================================
// Extensions-related stuff
/** Lite equivalent of {@link com.google.protobuf.GeneratedMessage.ExtendableMessageOrBuilder}. */
public interface ExtendableMessageOrBuilder<
MessageType extends ExtendableMessage,
BuilderType extends ExtendableBuilder>
extends MessageLiteOrBuilder {
/** Check if a singular extension is present. */
boolean hasExtension(ExtensionLite extension);
/** Get the number of elements in a repeated extension. */
int getExtensionCount(ExtensionLite> extension);
/** Get the value of an extension. */
Type getExtension(ExtensionLite extension);
/** Get one element of a repeated extension. */
Type getExtension(ExtensionLite> extension, int index);
}
/** Lite equivalent of {@link GeneratedMessage.ExtendableMessage}. */
public abstract static class ExtendableMessage<
MessageType extends ExtendableMessage,
BuilderType extends ExtendableBuilder>
extends GeneratedMessageLite
implements ExtendableMessageOrBuilder {
/** Represents the set of extensions on this message. For use by generated code only. */
protected FieldSet extensions = FieldSet.emptySet();
@SuppressWarnings("unchecked")
protected final void mergeExtensionFields(final MessageType other) {
if (extensions.isImmutable()) {
extensions = extensions.clone();
}
extensions.mergeFrom(((ExtendableMessage) other).extensions);
}
/**
* Parse an unknown field or an extension. For use by generated code only.
*
* For use by generated code only.
*
* @return {@code true} unless the tag is an end-group tag.
*/
protected boolean parseUnknownField(
MessageType defaultInstance,
CodedInputStream input,
ExtensionRegistryLite extensionRegistry,
int tag)
throws IOException {
int fieldNumber = WireFormat.getTagFieldNumber(tag);
// TODO: How much bytecode would be saved by not requiring the generated code to
// provide the default instance?
GeneratedExtension extension =
extensionRegistry.findLiteExtensionByNumber(defaultInstance, fieldNumber);
return parseExtension(input, extensionRegistry, extension, tag, fieldNumber);
}
private boolean parseExtension(
CodedInputStream input,
ExtensionRegistryLite extensionRegistry,
GeneratedExtension extension,
int tag,
int fieldNumber)
throws IOException {
int wireType = WireFormat.getTagWireType(tag);
boolean unknown = false;
boolean packed = false;
if (extension == null) {
unknown = true; // Unknown field.
} else if (wireType
== FieldSet.getWireFormatForFieldType(
extension.descriptor.getLiteType(), /* isPacked= */ false)) {
packed = false; // Normal, unpacked value.
} else if (extension.descriptor.isRepeated
&& extension.descriptor.type.isPackable()
&& wireType
== FieldSet.getWireFormatForFieldType(
extension.descriptor.getLiteType(), /* isPacked= */ true)) {
packed = true; // Packed value.
} else {
unknown = true; // Wrong wire type.
}
if (unknown) { // Unknown field or wrong wire type. Skip.
return parseUnknownField(tag, input);
}
// TODO: remove the unused variable
FieldSet unused = ensureExtensionsAreMutable();
if (packed) {
int length = input.readRawVarint32();
int limit = input.pushLimit(length);
if (extension.descriptor.getLiteType() == WireFormat.FieldType.ENUM) {
while (input.getBytesUntilLimit() > 0) {
int rawValue = input.readEnum();
Object value = extension.descriptor.getEnumType().findValueByNumber(rawValue);
if (value == null) {
// If the number isn't recognized as a valid value for this
// enum, drop it (don't even add it to unknownFields).
return true;
}
extensions.addRepeatedField(
extension.descriptor, extension.singularToFieldSetType(value));
}
} else {
while (input.getBytesUntilLimit() > 0) {
Object value =
FieldSet.readPrimitiveField(
input, extension.descriptor.getLiteType(), /*checkUtf8=*/ false);
extensions.addRepeatedField(extension.descriptor, value);
}
}
input.popLimit(limit);
} else {
Object value;
switch (extension.descriptor.getLiteJavaType()) {
case MESSAGE:
{
MessageLite.Builder subBuilder = null;
if (!extension.descriptor.isRepeated()) {
MessageLite existingValue = (MessageLite) extensions.getField(extension.descriptor);
if (existingValue != null) {
subBuilder = existingValue.toBuilder();
}
}
if (subBuilder == null) {
subBuilder = extension.getMessageDefaultInstance().newBuilderForType();
}
if (extension.descriptor.getLiteType() == WireFormat.FieldType.GROUP) {
input.readGroup(extension.getNumber(), subBuilder, extensionRegistry);
} else {
input.readMessage(subBuilder, extensionRegistry);
}
value = subBuilder.build();
break;
}
case ENUM:
int rawValue = input.readEnum();
value = extension.descriptor.getEnumType().findValueByNumber(rawValue);
// If the number isn't recognized as a valid value for this enum,
// write it to unknown fields object.
if (value == null) {
mergeVarintField(fieldNumber, rawValue);
return true;
}
break;
default:
value =
FieldSet.readPrimitiveField(
input, extension.descriptor.getLiteType(), /*checkUtf8=*/ false);
break;
}
if (extension.descriptor.isRepeated()) {
extensions.addRepeatedField(
extension.descriptor, extension.singularToFieldSetType(value));
} else {
extensions.setField(extension.descriptor, extension.singularToFieldSetType(value));
}
}
return true;
}
/**
* Parse an unknown field or an extension. For use by generated code only.
*
* For use by generated code only.
*
* @return {@code true} unless the tag is an end-group tag.
*/
protected boolean parseUnknownFieldAsMessageSet(
MessageType defaultInstance,
CodedInputStream input,
ExtensionRegistryLite extensionRegistry,
int tag)
throws IOException {
if (tag == WireFormat.MESSAGE_SET_ITEM_TAG) {
mergeMessageSetExtensionFromCodedStream(defaultInstance, input, extensionRegistry);
return true;
}
// TODO: Do we really want to support non message set wire format in message sets?
// Full runtime does... So we do for now.
int wireType = WireFormat.getTagWireType(tag);
if (wireType == WireFormat.WIRETYPE_LENGTH_DELIMITED) {
return parseUnknownField(defaultInstance, input, extensionRegistry, tag);
} else {
// TODO: Should we throw on invalid input? Full runtime does not...
return input.skipField(tag);
}
}
/**
* Merges the message set from the input stream; requires message set wire format.
*
* @param defaultInstance the default instance of the containing message we are parsing in
* @param input the stream to parse from
* @param extensionRegistry the registry to use when parsing
*/
private void mergeMessageSetExtensionFromCodedStream(
MessageType defaultInstance,
CodedInputStream input,
ExtensionRegistryLite extensionRegistry)
throws IOException {
// The wire format for MessageSet is:
// message MessageSet {
// repeated group Item = 1 {
// required uint32 typeId = 2;
// required bytes message = 3;
// }
// }
// "typeId" is the extension's field number. The extension can only be
// a message type, where "message" contains the encoded bytes of that
// message.
//
// In practice, we will probably never see a MessageSet item in which
// the message appears before the type ID, or where either field does not
// appear exactly once. However, in theory such cases are valid, so we
// should be prepared to accept them.
int typeId = 0;
ByteString rawBytes = null; // If we encounter "message" before "typeId"
GeneratedExtension extension = null;
// Read bytes from input, if we get it's type first then parse it eagerly,
// otherwise we store the raw bytes in a local variable.
while (true) {
final int tag = input.readTag();
if (tag == 0) {
break;
}
if (tag == WireFormat.MESSAGE_SET_TYPE_ID_TAG) {
typeId = input.readUInt32();
if (typeId != 0) {
extension = extensionRegistry.findLiteExtensionByNumber(defaultInstance, typeId);
}
} else if (tag == WireFormat.MESSAGE_SET_MESSAGE_TAG) {
if (typeId != 0) {
if (extension != null) {
// We already know the type, so we can parse directly from the
// input with no copying. Hooray!
eagerlyMergeMessageSetExtension(input, extension, extensionRegistry, typeId);
rawBytes = null;
continue;
}
}
// We haven't seen a type ID yet or we want parse message lazily.
rawBytes = input.readBytes();
} else { // Unknown tag. Skip it.
if (!input.skipField(tag)) {
break; // End of group
}
}
}
input.checkLastTagWas(WireFormat.MESSAGE_SET_ITEM_END_TAG);
// Process the raw bytes.
if (rawBytes != null && typeId != 0) { // Zero is not a valid type ID.
if (extension != null) { // We known the type
mergeMessageSetExtensionFromBytes(rawBytes, extensionRegistry, extension);
} else { // We don't know how to parse this. Ignore it.
if (rawBytes != null) {
mergeLengthDelimitedField(typeId, rawBytes);
}
}
}
}
private void eagerlyMergeMessageSetExtension(
CodedInputStream input,
GeneratedExtension extension,
ExtensionRegistryLite extensionRegistry,
int typeId)
throws IOException {
int fieldNumber = typeId;
int tag = WireFormat.makeTag(typeId, WireFormat.WIRETYPE_LENGTH_DELIMITED);
// TODO: remove the unused variable
boolean unused = parseExtension(input, extensionRegistry, extension, tag, fieldNumber);
}
private void mergeMessageSetExtensionFromBytes(
ByteString rawBytes,
ExtensionRegistryLite extensionRegistry,
GeneratedExtension extension)
throws IOException {
MessageLite.Builder subBuilder = null;
MessageLite existingValue = (MessageLite) extensions.getField(extension.descriptor);
if (existingValue != null) {
subBuilder = existingValue.toBuilder();
}
if (subBuilder == null) {
subBuilder = extension.getMessageDefaultInstance().newBuilderForType();
}
subBuilder.mergeFrom(rawBytes, extensionRegistry);
MessageLite value = subBuilder.build();
ensureExtensionsAreMutable()
.setField(extension.descriptor, extension.singularToFieldSetType(value));
}
@CanIgnoreReturnValue
FieldSet ensureExtensionsAreMutable() {
if (extensions.isImmutable()) {
extensions = extensions.clone();
}
return extensions;
}
private void verifyExtensionContainingType(final GeneratedExtension extension) {
if (extension.getContainingTypeDefaultInstance() != getDefaultInstanceForType()) {
// This can only happen if someone uses unchecked operations.
throw new IllegalArgumentException(
"This extension is for a different message type. Please make "
+ "sure that you are not suppressing any generics type warnings.");
}
}
/** Check if a singular extension is present. */
@Override
public final boolean hasExtension(final ExtensionLite extension) {
GeneratedExtension extensionLite = checkIsLite(extension);
verifyExtensionContainingType(extensionLite);
return extensions.hasField(extensionLite.descriptor);
}
/** Get the number of elements in a repeated extension. */
@Override
public final int getExtensionCount(
final ExtensionLite> extension) {
GeneratedExtension> extensionLite = checkIsLite(extension);
verifyExtensionContainingType(extensionLite);
return extensions.getRepeatedFieldCount(extensionLite.descriptor);
}
/** Get the value of an extension. */
@Override
@SuppressWarnings("unchecked")
public final Type getExtension(final ExtensionLite extension) {
GeneratedExtension extensionLite = checkIsLite(extension);
verifyExtensionContainingType(extensionLite);
final Object value = extensions.getField(extensionLite.descriptor);
if (value == null) {
return extensionLite.defaultValue;
} else {
return (Type) extensionLite.fromFieldSetType(value);
}
}
/** Get one element of a repeated extension. */
@Override
@SuppressWarnings("unchecked")
public final Type getExtension(
final ExtensionLite> extension, final int index) {
GeneratedExtension> extensionLite = checkIsLite(extension);
verifyExtensionContainingType(extensionLite);
return (Type)
extensionLite.singularFromFieldSetType(
extensions.getRepeatedField(extensionLite.descriptor, index));
}
/** Called by subclasses to check if all extensions are initialized. */
protected boolean extensionsAreInitialized() {
return extensions.isInitialized();
}
/**
* Used by subclasses to serialize extensions. Extension ranges may be interleaved with field
* numbers, but we must write them in canonical (sorted by field number) order. ExtensionWriter
* helps us write individual ranges of extensions at once.
*/
protected class ExtensionWriter {
// Imagine how much simpler this code would be if Java iterators had
// a way to get the next element without advancing the iterator.
private final Iterator> iter = extensions.iterator();
private Map.Entry next;
private final boolean messageSetWireFormat;
private ExtensionWriter(boolean messageSetWireFormat) {
if (iter.hasNext()) {
next = iter.next();
}
this.messageSetWireFormat = messageSetWireFormat;
}
public void writeUntil(final int end, final CodedOutputStream output) throws IOException {
while (next != null && next.getKey().getNumber() < end) {
ExtensionDescriptor extension = next.getKey();
if (messageSetWireFormat
&& extension.getLiteJavaType() == WireFormat.JavaType.MESSAGE
&& !extension.isRepeated()) {
output.writeMessageSetExtension(extension.getNumber(), (MessageLite) next.getValue());
} else {
FieldSet.writeField(extension, next.getValue(), output);
}
if (iter.hasNext()) {
next = iter.next();
} else {
next = null;
}
}
}
}
protected ExtensionWriter newExtensionWriter() {
return new ExtensionWriter(false);
}
protected ExtensionWriter newMessageSetExtensionWriter() {
return new ExtensionWriter(true);
}
/** Called by subclasses to compute the size of extensions. */
protected int extensionsSerializedSize() {
return extensions.getSerializedSize();
}
protected int extensionsSerializedSizeAsMessageSet() {
return extensions.getMessageSetSerializedSize();
}
}
/** Lite equivalent of {@link GeneratedMessage.ExtendableBuilder}. */
@SuppressWarnings("unchecked")
public abstract static class ExtendableBuilder<
MessageType extends ExtendableMessage,
BuilderType extends ExtendableBuilder>
extends Builder
implements ExtendableMessageOrBuilder {
protected ExtendableBuilder(MessageType defaultInstance) {
super(defaultInstance);
}
// For immutable message conversion.
void internalSetExtensionSet(FieldSet extensions) {
copyOnWrite();
instance.extensions = extensions;
}
@Override
protected void copyOnWriteInternal() {
super.copyOnWriteInternal();
if (instance.extensions != FieldSet.emptySet()) {
instance.extensions = instance.extensions.clone();
}
}
private FieldSet ensureExtensionsAreMutable() {
FieldSet extensions = instance.extensions;
if (extensions.isImmutable()) {
extensions = extensions.clone();
instance.extensions = extensions;
}
return extensions;
}
@Override
public final MessageType buildPartial() {
if (!instance.isMutable()) {
return instance;
}
instance.extensions.makeImmutable();
return super.buildPartial();
}
private void verifyExtensionContainingType(final GeneratedExtension extension) {
if (extension.getContainingTypeDefaultInstance() != getDefaultInstanceForType()) {
// This can only happen if someone uses unchecked operations.
throw new IllegalArgumentException(
"This extension is for a different message type. Please make "
+ "sure that you are not suppressing any generics type warnings.");
}
}
/** Check if a singular extension is present. */
@Override
public final boolean hasExtension(final ExtensionLite extension) {
return instance.hasExtension(extension);
}
/** Get the number of elements in a repeated extension. */
@Override
public final int getExtensionCount(
final ExtensionLite> extension) {
return instance.getExtensionCount(extension);
}
/** Get the value of an extension. */
@Override
public final Type getExtension(final ExtensionLite extension) {
return instance.getExtension(extension);
}
/** Get one element of a repeated extension. */
@Override
public final Type getExtension(
final ExtensionLite> extension, final int index) {
return instance.getExtension(extension, index);
}
/** Set the value of an extension. */
public final BuilderType setExtension(
final ExtensionLite extension, final Type value) {
GeneratedExtension extensionLite = checkIsLite(extension);
verifyExtensionContainingType(extensionLite);
copyOnWrite();
ensureExtensionsAreMutable()
.setField(extensionLite.descriptor, extensionLite.toFieldSetType(value));
return (BuilderType) this;
}
/** Set the value of one element of a repeated extension. */
public final BuilderType setExtension(
final ExtensionLite> extension, final int index, final Type value) {
GeneratedExtension> extensionLite = checkIsLite(extension);
verifyExtensionContainingType(extensionLite);
copyOnWrite();
ensureExtensionsAreMutable()
.setRepeatedField(
extensionLite.descriptor, index, extensionLite.singularToFieldSetType(value));
return (BuilderType) this;
}
/** Append a value to a repeated extension. */
public final BuilderType addExtension(
final ExtensionLite> extension, final Type value) {
GeneratedExtension> extensionLite = checkIsLite(extension);
verifyExtensionContainingType(extensionLite);
copyOnWrite();
ensureExtensionsAreMutable()
.addRepeatedField(extensionLite.descriptor, extensionLite.singularToFieldSetType(value));
return (BuilderType) this;
}
/** Clear an extension. */
public final BuilderType clearExtension(final ExtensionLite extension) {
GeneratedExtension extensionLite = checkIsLite(extension);
verifyExtensionContainingType(extensionLite);
copyOnWrite();
ensureExtensionsAreMutable().clearField(extensionLite.descriptor);
return (BuilderType) this;
}
}
// -----------------------------------------------------------------
/** For use by generated code only. */
public static
GeneratedExtension newSingularGeneratedExtension(
final ContainingType containingTypeDefaultInstance,
final Type defaultValue,
final MessageLite messageDefaultInstance,
final Internal.EnumLiteMap enumTypeMap,
final int number,
final WireFormat.FieldType type,
final Class singularType) {
return new GeneratedExtension(
containingTypeDefaultInstance,
defaultValue,
messageDefaultInstance,
new ExtensionDescriptor(
enumTypeMap, number, type, /* isRepeated= */ false, /* isPacked= */ false),
singularType);
}
/** For use by generated code only. */
public static
GeneratedExtension newRepeatedGeneratedExtension(
final ContainingType containingTypeDefaultInstance,
final MessageLite messageDefaultInstance,
final Internal.EnumLiteMap enumTypeMap,
final int number,
final WireFormat.FieldType type,
final boolean isPacked,
final Class singularType) {
@SuppressWarnings("unchecked") // Subclasses ensure Type is a List
Type emptyList = (Type) ProtobufArrayList.emptyList();
return new GeneratedExtension(
containingTypeDefaultInstance,
emptyList,
messageDefaultInstance,
new ExtensionDescriptor(enumTypeMap, number, type, /* isRepeated= */ true, isPacked),
singularType);
}
static final class ExtensionDescriptor
implements FieldSet.FieldDescriptorLite {
ExtensionDescriptor(
final Internal.EnumLiteMap enumTypeMap,
final int number,
final WireFormat.FieldType type,
final boolean isRepeated,
final boolean isPacked) {
this.enumTypeMap = enumTypeMap;
this.number = number;
this.type = type;
this.isRepeated = isRepeated;
this.isPacked = isPacked;
}
final Internal.EnumLiteMap enumTypeMap;
final int number;
final WireFormat.FieldType type;
final boolean isRepeated;
final boolean isPacked;
@Override
public int getNumber() {
return number;
}
@Override
public WireFormat.FieldType getLiteType() {
return type;
}
@Override
public WireFormat.JavaType getLiteJavaType() {
return type.getJavaType();
}
@Override
public boolean isRepeated() {
return isRepeated;
}
@Override
public boolean isPacked() {
return isPacked;
}
@Override
public Internal.EnumLiteMap getEnumType() {
return enumTypeMap;
}
@Override
@SuppressWarnings("unchecked")
public MessageLite.Builder internalMergeFrom(MessageLite.Builder to, MessageLite from) {
return ((Builder) to).mergeFrom((GeneratedMessageLite) from);
}
@Override
public int compareTo(ExtensionDescriptor other) {
return number - other.number;
}
}
// =================================================================
/** Calls Class.getMethod and throws a RuntimeException if it fails. */
@SuppressWarnings("unchecked")
static Method getMethodOrDie(Class clazz, String name, Class... params) {
try {
return clazz.getMethod(name, params);
} catch (NoSuchMethodException e) {
throw new RuntimeException(
"Generated message class \"" + clazz.getName() + "\" missing method \"" + name + "\".",
e);
}
}
/** Calls invoke and throws a RuntimeException if it fails. */
static Object invokeOrDie(Method method, Object object, Object... params) {
try {
return method.invoke(object, params);
} catch (IllegalAccessException e) {
throw new RuntimeException(
"Couldn't use Java reflection to implement protocol message reflection.", e);
} catch (InvocationTargetException e) {
final Throwable cause = e.getCause();
if (cause instanceof RuntimeException) {
throw (RuntimeException) cause;
} else if (cause instanceof Error) {
throw (Error) cause;
} else {
throw new RuntimeException(
"Unexpected exception thrown by generated accessor method.", cause);
}
}
}
/**
* Lite equivalent to {@link GeneratedMessage.GeneratedExtension}.
*
* Users should ignore the contents of this class and only use objects of this type as
* parameters to extension accessors and ExtensionRegistry.add().
*/
public static class GeneratedExtension
extends ExtensionLite {
/**
* Create a new instance with the given parameters.
*
* The last parameter {@code singularType} is only needed for enum types. We store integer
* values for enum types in a {@link ExtendableMessage} and use Java reflection to convert an
* integer value back into a concrete enum object.
*/
GeneratedExtension(
final ContainingType containingTypeDefaultInstance,
final Type defaultValue,
final MessageLite messageDefaultInstance,
final ExtensionDescriptor descriptor,
final Class singularType) {
// Defensive checks to verify the correct initialization order of
// GeneratedExtensions and their related GeneratedMessages.
if (containingTypeDefaultInstance == null) {
throw new IllegalArgumentException("Null containingTypeDefaultInstance");
}
if (descriptor.getLiteType() == WireFormat.FieldType.MESSAGE
&& messageDefaultInstance == null) {
throw new IllegalArgumentException("Null messageDefaultInstance");
}
this.containingTypeDefaultInstance = containingTypeDefaultInstance;
this.defaultValue = defaultValue;
this.messageDefaultInstance = messageDefaultInstance;
this.descriptor = descriptor;
}
final ContainingType containingTypeDefaultInstance;
final Type defaultValue;
final MessageLite messageDefaultInstance;
final ExtensionDescriptor descriptor;
/** Default instance of the type being extended, used to identify that type. */
public ContainingType getContainingTypeDefaultInstance() {
return containingTypeDefaultInstance;
}
/** Get the field number. */
@Override
public int getNumber() {
return descriptor.getNumber();
}
/**
* If the extension is an embedded message or group, returns the default instance of the
* message.
*/
@Override
public MessageLite getMessageDefaultInstance() {
return messageDefaultInstance;
}
Object fromFieldSetType(Object value) {
if (descriptor.isRepeated()) {
if (descriptor.getLiteJavaType() == WireFormat.JavaType.ENUM) {
ProtobufArrayList