# Interface MessageOrBuilder (3.19.4)

    public interface MessageOrBuilder extends MessageLiteOrBuilder

Base interface for methods common to [Message](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Message) and [Message.Builder](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Message.Builder) to provide type
equivalency.

## Implements

[MessageLiteOrBuilder](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.MessageLiteOrBuilder)

## Methods

### findInitializationErrors()

    public abstract List<String> 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<https://docs.oracle.com/javase/8/docs/api/java/lang/String.html>` |   |

### getAllFields()

    public abstract Map<Descriptors.FieldDescriptor,Object> getAllFields()

Returns a collection of all the fields in this message which are set and their corresponding
values. A singular ("required" or "optional") field is set iff hasField() returns true for that
field. A "repeated" field is set iff getRepeatedFieldCount() is greater than zero. The values
are exactly what would be returned by calling [#getField(Descriptors.FieldDescriptor)](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.MessageOrBuilder#com_google_protobuf_MessageOrBuilder_getField_com_google_protobuf_Descriptors_FieldDescriptor_)
for each field. The map is guaranteed to be a sorted map, so iterating over it will return
fields in order by field number.   

If this is for a builder, the returned map may or may not reflect future changes to the
builder. Either way, the returned map is itself unmodifiable.

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Descriptors.FieldDescriptor,https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html>` |   |

### getDefaultInstanceForType()

    public abstract Message getDefaultInstanceForType()

Get an instance of the type with no fields set. Because no fields are set, all getters for
singular fields will return default values and repeated fields will appear empty. This may or
may not be a singleton. This differs from the `getDefaultInstance()` method of generated
message classes in that this method is an abstract method of the `MessageLite` interface
whereas `getDefaultInstance()` is a static method of a specific class. They return the
same thing.

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Message` |   |

### getDescriptorForType()

    public abstract Descriptors.Descriptor getDescriptorForType()

Get the message's type's descriptor. This differs from the `getDescriptor()` method of
generated message classes in that this method is an abstract method of the `Message`
interface whereas `getDescriptor()` is a static method of a specific class. They return
the same thing.

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Descriptors.Descriptor` |   |

### getField(Descriptors.FieldDescriptor field)

    public abstract Object getField(Descriptors.FieldDescriptor field)

Obtains the value of the given field, or the default value if it is not set. For primitive
fields, the boxed primitive value is returned. For enum fields, the EnumValueDescriptor for the
value is returned. For embedded message fields, the sub-message is returned. For repeated
fields, a java.util.List is returned.

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `field` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Descriptors.FieldDescriptor` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |   |

### getInitializationErrorString()

    public abstract 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 abstract Descriptors.FieldDescriptor getOneofFieldDescriptor(Descriptors.OneofDescriptor oneof)

Obtains the FieldDescriptor if the given oneof is set. Returns null if no field is set.

| **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` |   |

### getRepeatedField(Descriptors.FieldDescriptor field, int index)

    public abstract Object getRepeatedField(Descriptors.FieldDescriptor field, int index)

Gets an element of a repeated field. For primitive fields, the boxed primitive value is
returned. For enum fields, the EnumValueDescriptor for the value is returned. For embedded
message fields, the sub-message is returned.

| **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.oracle.com/javase/8/docs/api/java/lang/Object.html` |   |

### getRepeatedFieldCount(Descriptors.FieldDescriptor field)

    public abstract int getRepeatedFieldCount(Descriptors.FieldDescriptor field)

Gets the number of elements of a repeated field. This is exactly equivalent to calling the
generated "Count" accessor method corresponding to the field.

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `field` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Descriptors.FieldDescriptor` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` |   |

### getUnknownFields()

    public abstract UnknownFieldSet getUnknownFields()

Get the [UnknownFieldSet](https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.UnknownFieldSet) for this message.

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.UnknownFieldSet` |   |

### hasField(Descriptors.FieldDescriptor field)

    public abstract boolean hasField(Descriptors.FieldDescriptor field)

Returns true if the given field is set. This is exactly equivalent to calling the generated
"has" accessor method corresponding to the field.

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `field` | `https://docs.cloud.google.com/java/docs/reference/protobuf/latest/com.google.protobuf.Descriptors.FieldDescriptor` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` |   |

### hasOneof(Descriptors.OneofDescriptor oneof)

    public abstract boolean hasOneof(Descriptors.OneofDescriptor oneof)

Returns true if the given oneof is set.

| **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` |   |