# Class AbstractMessage.Builder<BuilderType> (3.19.4) public abstract static class AbstractMessage.Builder extends AbstractMessageLite.Builder implements Message.Builder A partial implementation of the [Message.Builder](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Message.Builder) interface which implements as many methods of that interface as possible in terms of other methods. ## Inheritance [java.lang.Object](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html) \> [AbstractMessageLite.Builder](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder) \> AbstractMessage.Builder\ ## Implements [Message.Builder](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Message.Builder) ## Inherited Members [AbstractMessageLite.Builder.\addAll(Iterable\,Collection\)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder__T_addAll_java_lang_Iterable_T__java_util_Collection___super_T__) [AbstractMessageLite.Builder.\addAll(Iterable\,List\)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder__T_addAll_java_lang_Iterable_T__java_util_List___super_T__) [AbstractMessageLite.Builder.clone()](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_clone__) [AbstractMessageLite.Builder.internalMergeFrom(MessageType)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_internalMergeFrom_MessageType_) [AbstractMessageLite.Builder.mergeDelimitedFrom(InputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeDelimitedFrom_java_io_InputStream_) [AbstractMessageLite.Builder.mergeDelimitedFrom(InputStream,ExtensionRegistryLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeDelimitedFrom_java_io_InputStream_com_google_protobuf_ExtensionRegistryLite_) [AbstractMessageLite.Builder.mergeFrom(byte\[\])](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_byte___) [AbstractMessageLite.Builder.mergeFrom(byte\[\],ExtensionRegistryLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_byte___com_google_protobuf_ExtensionRegistryLite_) [AbstractMessageLite.Builder.mergeFrom(byte\[\],int,int)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_byte___int_int_) [AbstractMessageLite.Builder.mergeFrom(byte\[\],int,int,ExtensionRegistryLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_byte___int_int_com_google_protobuf_ExtensionRegistryLite_) [AbstractMessageLite.Builder.mergeFrom(ByteString)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_com_google_protobuf_ByteString_) [AbstractMessageLite.Builder.mergeFrom(ByteString,ExtensionRegistryLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_com_google_protobuf_ByteString_com_google_protobuf_ExtensionRegistryLite_) [AbstractMessageLite.Builder.mergeFrom(CodedInputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_com_google_protobuf_CodedInputStream_) [AbstractMessageLite.Builder.mergeFrom(CodedInputStream,ExtensionRegistryLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_com_google_protobuf_CodedInputStream_com_google_protobuf_ExtensionRegistryLite_) [AbstractMessageLite.Builder.mergeFrom(MessageLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_com_google_protobuf_MessageLite_) [AbstractMessageLite.Builder.mergeFrom(InputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_java_io_InputStream_) [AbstractMessageLite.Builder.mergeFrom(InputStream,ExtensionRegistryLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_java_io_InputStream_com_google_protobuf_ExtensionRegistryLite_) [AbstractMessageLite.Builder.newUninitializedMessageException(MessageLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_newUninitializedMessageException_com_google_protobuf_MessageLite_) [Object.equals(Object)](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#equals-java.lang.Object-) [Object.finalize()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#finalize--) [Object.getClass()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#getClass--) [Object.hashCode()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#hashCode--) [Object.notify()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notify--) [Object.notifyAll()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notifyAll--) [Object.toString()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#toString--) [Object.wait()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--) [Object.wait(long)](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-) [Object.wait(long,int)](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-) | ## Type Parameter || |---|---| | **Name** | **Description** | | `BuilderType` | | ## Static Methods ### newUninitializedMessageException(Message message) protected static UninitializedMessageException newUninitializedMessageException(Message message) Construct an UninitializedMessageException reporting missing fields in the given message. | **Parameter** || |---|---| | **Name** | **Description** | | `message` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Message` | | **Returns** || |---|---| | **Type** | **Description** | | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.UninitializedMessageException` | | ## Constructors ### Builder() public Builder() ## Methods ### clear() public BuilderType clear() Resets all fields to their default values. | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | ### clearOneof(Descriptors.OneofDescriptor oneof) public BuilderType clearOneof(Descriptors.OneofDescriptor oneof) TODO(jieluo): Clear it when all subclasses have implemented this method. | **Parameter** || |---|---| | **Name** | **Description** | | `oneof` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Descriptors.OneofDescriptor` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | ### clone() public BuilderType clone() Clones the Builder. | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.clone()](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_clone__) ### findInitializationErrors() public List findInitializationErrors() Returns a list of field paths (e.g. "foo.bar.baz") of required fields which are not set in this message. You should call [MessageLiteOrBuilder#isInitialized()](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.MessageLiteOrBuilder#com_google_protobuf_MessageLiteOrBuilder_isInitialized__) first to check if there are any missing fields, as that method is likely to be much faster than this one even when the message is fully-initialized. | **Returns** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/8/docs/api/java/util/List.html` | | ### getFieldBuilder(Descriptors.FieldDescriptor field) public Message.Builder getFieldBuilder(Descriptors.FieldDescriptor field) Get a nested builder instance for the given field. Normally, we hold a reference to the immutable message object for the message type field. Some implementations(the generated message builders), however, can also hold a reference to the builder object (a nested builder) for the field. If the field is already backed up by a nested builder, the nested builder will be returned. Otherwise, a new field builder will be created and returned. The original message field (if exist) will be merged into the field builder, which will then be nested into its parent builder. NOTE: implementations that do not support nested builders will throw ` UnsupportedOperationException`. | **Parameter** || |---|---| | **Name** | **Description** | | `field` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Descriptors.FieldDescriptor` | | **Returns** || |---|---| | **Type** | **Description** | | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Message.Builder` | | ### getInitializationErrorString() public String getInitializationErrorString() Returns a comma-delimited list of required fields which are not set in this message object. You should call [MessageLiteOrBuilder#isInitialized()](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.MessageLiteOrBuilder#com_google_protobuf_MessageLiteOrBuilder_isInitialized__) first to check if there are any missing fields, as that method is likely to be much faster than this one even when the message is fully-initialized. | **Returns** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/8/docs/api/java/lang/String.html` | | ### getOneofFieldDescriptor(Descriptors.OneofDescriptor oneof) public Descriptors.FieldDescriptor getOneofFieldDescriptor(Descriptors.OneofDescriptor oneof) TODO(jieluo): Clear it when all subclasses have implemented this method. | **Parameter** || |---|---| | **Name** | **Description** | | `oneof` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Descriptors.OneofDescriptor` | | **Returns** || |---|---| | **Type** | **Description** | | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Descriptors.FieldDescriptor` | | ### getRepeatedFieldBuilder(Descriptors.FieldDescriptor field, int index) public Message.Builder getRepeatedFieldBuilder(Descriptors.FieldDescriptor field, int index) Get a nested builder instance for the given repeated field instance. Normally, we hold a reference to the immutable message object for the message type field. Some implementations(the generated message builders), however, can also hold a reference to the builder object (a nested builder) for the field. If the field is already backed up by a nested builder, the nested builder will be returned. Otherwise, a new field builder will be created and returned. The original message field (if exist) will be merged into the field builder, which will then be nested into its parent builder. NOTE: implementations that do not support nested builders will throw ` UnsupportedOperationException`. | **Parameters** || |---|---| | **Name** | **Description** | | `field` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Descriptors.FieldDescriptor` | | `index` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | | **Returns** || |---|---| | **Type** | **Description** | | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Message.Builder` | | ### hasOneof(Descriptors.OneofDescriptor oneof) public boolean hasOneof(Descriptors.OneofDescriptor oneof) TODO(jieluo): Clear it when all subclasses have implemented this method. | **Parameter** || |---|---| | **Name** | **Description** | | `oneof` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Descriptors.OneofDescriptor` | | **Returns** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | | ### internalMergeFrom(AbstractMessageLite other) protected BuilderType internalMergeFrom(AbstractMessageLite other) | **Parameter** || |---|---| | **Name** | **Description** | | `other` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.internalMergeFrom(MessageType message)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_internalMergeFrom_MessageType_) ### mergeDelimitedFrom(InputStream input) public boolean mergeDelimitedFrom(InputStream input) Like [#mergeFrom(InputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessage.Builder#com_google_protobuf_AbstractMessage_Builder_mergeFrom_java_io_InputStream_), but does not read until EOF. Instead, the size of the message (encoded as a varint) is read first, then the message data. Use [MessageLite#writeDelimitedTo(OutputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.MessageLite#com_google_protobuf_MessageLite_writeDelimitedTo_java_io_OutputStream_) to write messages in this format. | **Parameter** || |---|---| | **Name** | **Description** | | `input` | `https://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html` | | **Returns** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | | **Overrides** [AbstractMessageLite.Builder\.mergeDelimitedFrom(InputStream input)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeDelimitedFrom_java_io_InputStream_) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html` | | ### mergeDelimitedFrom(InputStream input, ExtensionRegistryLite extensionRegistry) public boolean mergeDelimitedFrom(InputStream input, ExtensionRegistryLite extensionRegistry) Like [#mergeDelimitedFrom(InputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessage.Builder#com_google_protobuf_AbstractMessage_Builder_mergeDelimitedFrom_java_io_InputStream_) but supporting extensions. | **Parameters** || |---|---| | **Name** | **Description** | | `input` | `https://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html` | | `extensionRegistry` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ExtensionRegistryLite` | | **Returns** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | | **Overrides** [AbstractMessageLite.Builder\.mergeDelimitedFrom(InputStream input, ExtensionRegistryLite extensionRegistry)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeDelimitedFrom_java_io_InputStream_com_google_protobuf_ExtensionRegistryLite_) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html` | | ### mergeFrom(byte\[\] data) public BuilderType mergeFrom(byte[] data) Parse `data` as a message of this type and merge it with the message being built. This is just a small wrapper around [#mergeFrom(CodedInputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessage.Builder#com_google_protobuf_AbstractMessage_Builder_mergeFrom_com_google_protobuf_CodedInputStream_). | **Parameter** || |---|---| | **Name** | **Description** | | `data` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html[]` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.mergeFrom(byte\[\] data)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_byte___) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.InvalidProtocolBufferException` | | ### mergeFrom(byte\[\] data, ExtensionRegistryLite extensionRegistry) public BuilderType mergeFrom(byte[] data, ExtensionRegistryLite extensionRegistry) Parse `data` as a message of this type and merge it with the message being built. This is just a small wrapper around [#mergeFrom(CodedInputStream,ExtensionRegistryLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessage.Builder#com_google_protobuf_AbstractMessage_Builder_mergeFrom_com_google_protobuf_CodedInputStream_com_google_protobuf_ExtensionRegistryLite_). | **Parameters** || |---|---| | **Name** | **Description** | | `data` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html[]` | | `extensionRegistry` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ExtensionRegistryLite` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.mergeFrom(byte\[\] data, ExtensionRegistryLite extensionRegistry)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_byte___com_google_protobuf_ExtensionRegistryLite_) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.InvalidProtocolBufferException` | | ### mergeFrom(byte\[\] data, int off, int len) public BuilderType mergeFrom(byte[] data, int off, int len) Parse `data` as a message of this type and merge it with the message being built. This is just a small wrapper around [#mergeFrom(CodedInputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessage.Builder#com_google_protobuf_AbstractMessage_Builder_mergeFrom_com_google_protobuf_CodedInputStream_). | **Parameters** || |---|---| | **Name** | **Description** | | `data` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html[]` | | `off` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | | `len` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.mergeFrom(byte\[\] data, int off, int len)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_byte___int_int_) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.InvalidProtocolBufferException` | | ### mergeFrom(byte\[\] data, int off, int len, ExtensionRegistryLite extensionRegistry) public BuilderType mergeFrom(byte[] data, int off, int len, ExtensionRegistryLite extensionRegistry) Parse `data` as a message of this type and merge it with the message being built. This is just a small wrapper around [#mergeFrom(CodedInputStream,ExtensionRegistryLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessage.Builder#com_google_protobuf_AbstractMessage_Builder_mergeFrom_com_google_protobuf_CodedInputStream_com_google_protobuf_ExtensionRegistryLite_). | **Parameters** || |---|---| | **Name** | **Description** | | `data` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html[]` | | `off` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | | `len` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | | `extensionRegistry` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ExtensionRegistryLite` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.mergeFrom(byte\[\] data, int off, int len, ExtensionRegistryLite extensionRegistry)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_byte___int_int_com_google_protobuf_ExtensionRegistryLite_) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.InvalidProtocolBufferException` | | ### mergeFrom(ByteString data) public BuilderType mergeFrom(ByteString data) Parse `data` as a message of this type and merge it with the message being built. This is just a small wrapper around [#mergeFrom(CodedInputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessage.Builder#com_google_protobuf_AbstractMessage_Builder_mergeFrom_com_google_protobuf_CodedInputStream_). | **Parameter** || |---|---| | **Name** | **Description** | | `data` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ByteString` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.mergeFrom(ByteString data)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_com_google_protobuf_ByteString_) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.InvalidProtocolBufferException` | | ### mergeFrom(ByteString data, ExtensionRegistryLite extensionRegistry) public BuilderType mergeFrom(ByteString data, ExtensionRegistryLite extensionRegistry) Parse `data` as a message of this type and merge it with the message being built. This is just a small wrapper around [#mergeFrom(CodedInputStream,ExtensionRegistryLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessage.Builder#com_google_protobuf_AbstractMessage_Builder_mergeFrom_com_google_protobuf_CodedInputStream_com_google_protobuf_ExtensionRegistryLite_). | **Parameters** || |---|---| | **Name** | **Description** | | `data` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ByteString` | | `extensionRegistry` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ExtensionRegistryLite` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.mergeFrom(ByteString data, ExtensionRegistryLite extensionRegistry)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_com_google_protobuf_ByteString_com_google_protobuf_ExtensionRegistryLite_) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.InvalidProtocolBufferException` | | ### mergeFrom(CodedInputStream input) public BuilderType mergeFrom(CodedInputStream input) Parses a message of this type from the input and merges it with this message. Warning: This does not verify that all required fields are present in the input message. If you call #build() without setting all required fields, it will throw an [UninitializedMessageException](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.UninitializedMessageException), which is a `RuntimeException` and thus might not be caught. There are a few good ways to deal with this: - Call #isInitialized() to verify that all required fields are set before building. - Use `buildPartial()` to build, which ignores missing required fields. Note: The caller should call [CodedInputStream#checkLastTagWas(int)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.CodedInputStream#com_google_protobuf_CodedInputStream_checkLastTagWas_int_) after calling this to verify that the last tag seen was the appropriate end-group tag, or zero for EOF. | **Parameter** || |---|---| | **Name** | **Description** | | `input` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.CodedInputStream` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.mergeFrom(CodedInputStream input)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_com_google_protobuf_CodedInputStream_) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html` | | ### mergeFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry) public BuilderType mergeFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry) Like Builder#mergeFrom(CodedInputStream), but also parses extensions. The extensions that you want to be able to parse must be registered in `extensionRegistry`. Extensions not in the registry will be treated as unknown fields. | **Parameters** || |---|---| | **Name** | **Description** | | `input` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.CodedInputStream` | | `extensionRegistry` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ExtensionRegistryLite` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.mergeFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_com_google_protobuf_CodedInputStream_com_google_protobuf_ExtensionRegistryLite_) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html` | | ### mergeFrom(Message other) public BuilderType mergeFrom(Message other) Merge `other` into the message being built. `other` must have the exact same type as `this` (i.e. `getDescriptorForType() == other.getDescriptorForType()`). Merging occurs as follows. For each field: - For singular primitive fields, if the field is set in `other`, then `other`'s value overwrites the value in this message. - For singular message fields, if the field is set in `other`, it is merged into the corresponding sub-message of this message using the same merging rules. - For repeated fields, the elements in `other` are concatenated with the elements in this message. - For oneof groups, if the other message has one of the fields set, the group of this message is cleared and replaced by the field of the other message, so that the oneof constraint is preserved.
This is equivalent to the `Message::MergeFrom` method in C++. | **Parameter** || |---|---| | **Name** | **Description** | | `other` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Message` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | ### mergeFrom(InputStream input) public BuilderType mergeFrom(InputStream input) Parse a message of this type from `input` and merge it with the message being built. This is just a small wrapper around [#mergeFrom(CodedInputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessage.Builder#com_google_protobuf_AbstractMessage_Builder_mergeFrom_com_google_protobuf_CodedInputStream_). Note that this method always reads the *entire* input (unless it throws an exception). If you want it to stop earlier, you will need to wrap your input in some wrapper stream that limits reading. Or, use [MessageLite#writeDelimitedTo(OutputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.MessageLite#com_google_protobuf_MessageLite_writeDelimitedTo_java_io_OutputStream_) to write your message and [#mergeDelimitedFrom(InputStream)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessage.Builder#com_google_protobuf_AbstractMessage_Builder_mergeDelimitedFrom_java_io_InputStream_) to read it. Despite usually reading the entire input, this does not close the stream. | **Parameter** || |---|---| | **Name** | **Description** | | `input` | `https://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.mergeFrom(InputStream input)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_java_io_InputStream_) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html` | | ### mergeFrom(InputStream input, ExtensionRegistryLite extensionRegistry) public BuilderType mergeFrom(InputStream input, ExtensionRegistryLite extensionRegistry) Parse a message of this type from `input` and merge it with the message being built. This is just a small wrapper around [#mergeFrom(CodedInputStream,ExtensionRegistryLite)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessage.Builder#com_google_protobuf_AbstractMessage_Builder_mergeFrom_com_google_protobuf_CodedInputStream_com_google_protobuf_ExtensionRegistryLite_). | **Parameters** || |---|---| | **Name** | **Description** | | `input` | `https://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html` | | `extensionRegistry` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.ExtensionRegistryLite` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | **Overrides** [AbstractMessageLite.Builder\.mergeFrom(InputStream input, ExtensionRegistryLite extensionRegistry)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.AbstractMessageLite.Builder#com_google_protobuf_AbstractMessageLite_Builder_mergeFrom_java_io_InputStream_com_google_protobuf_ExtensionRegistryLite_) | **Exceptions** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html` | | ### mergeUnknownFields(UnknownFieldSet unknownFields) public BuilderType mergeUnknownFields(UnknownFieldSet unknownFields) Merge some unknown fields into the [UnknownFieldSet](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.UnknownFieldSet) for this message. | **Parameter** || |---|---| | **Name** | **Description** | | `unknownFields` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.UnknownFieldSet` | | **Returns** || |---|---| | **Type** | **Description** | | `BuilderType` | | ### toString() public String toString() | **Returns** || |---|---| | **Type** | **Description** | | `https://docs.oracle.com/javase/8/docs/api/java/lang/String.html` | | **Overrides** [Object.toString()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#toString--)