com.google.protobuf.Internal#EnumLite ( )源码实例Demo

private static Descriptors.FieldDescriptor.JavaType getJavaType(@Nonnull Object o) {
    if (o instanceof Boolean) {
        return JavaType.BOOLEAN;
    } else if (o instanceof ByteString || o instanceof byte[]) {
        return JavaType.BYTE_STRING;
    } else if (o instanceof Double) {
        return JavaType.DOUBLE;
    } else if (o instanceof Float) {
        return JavaType.FLOAT;
    } else if (o instanceof Long) {
        return JavaType.LONG;
    } else if (o instanceof Integer) {
        return JavaType.INT;
    } else if (o instanceof String) {
        return JavaType.STRING;
    } else if (o instanceof Internal.EnumLite) {
        return JavaType.ENUM;
    } else {
        throw new RecordCoreException(o.getClass() + " is an invalid type for a comparand");
    }
}
 

/**
 * Write a field of arbitrary type, without its tag, to the stream.
 *
 * @param output The output stream.
 * @param type The field's type.
 * @param value Object representing the field's value. Must be of the exact type which would be returned by
 *            {@link Message#getField(Descriptors.FieldDescriptor)} for this field.
 * @throws IOException Signals that an I/O exception has occurred.
 */
public static void writeElementNoTag(final CodedOutputStream output, final WireFormat.FieldType type,
        final Object value) throws IOException {
    switch (type) {
        case DOUBLE:
            output.writeDoubleNoTag((Double) value);
            break;
        case FLOAT:
            output.writeFloatNoTag((Float) value);
            break;
        case INT64:
            output.writeInt64NoTag((Long) value);
            break;
        case UINT64:
            output.writeUInt64NoTag((Long) value);
            break;
        case INT32:
            output.writeInt32NoTag((Integer) value);
            break;
        case FIXED64:
            output.writeFixed64NoTag((Long) value);
            break;
        case FIXED32:
            output.writeFixed32NoTag((Integer) value);
            break;
        case BOOL:
            output.writeBoolNoTag((Boolean) value);
            break;
        case STRING:
            output.writeStringNoTag((String) value);
            break;
        // group not support yet
        // case GROUP : output.writeGroupNoTag ((MessageLite) value); break;
        case MESSAGE:
            writeObject(output, 0, FieldType.OBJECT, value, false, false);
            break;
        case BYTES:
            if (value instanceof ByteString) {
                output.writeBytesNoTag((ByteString) value);
            } else {
                byte[] v;
                if (value instanceof Byte[]) {
                    v = toByteArray((Byte[]) value);
                } else {
                    v = (byte[]) value;
                }
                output.writeByteArrayNoTag(v);
            }
            break;
        case UINT32:
            output.writeUInt32NoTag((Integer) value);
            break;
        case SFIXED32:
            output.writeSFixed32NoTag((Integer) value);
            break;
        case SFIXED64:
            output.writeSFixed64NoTag((Long) value);
            break;
        case SINT32:
            output.writeSInt32NoTag((Integer) value);
            break;
        case SINT64:
            output.writeSInt64NoTag((Long) value);
            break;

        case ENUM:
            if (value instanceof Internal.EnumLite) {
                output.writeEnumNoTag(((Internal.EnumLite) value).getNumber());
            } else {

                if (value instanceof EnumReadable) {
                    output.writeEnumNoTag(((EnumReadable) value).value());
                } else if (value instanceof Enum) {
                    output.writeEnumNoTag(((Enum) value).ordinal());
                } else {
                    output.writeEnumNoTag(((Integer) value).intValue());
                }

            }
            break;
    }
}
 

/**
 * Compute the number of bytes that would be needed to encode a particular value of arbitrary type, excluding tag.
 *
 * @param type The field's type.
 * @param value Object representing the field's value. Must be of the exact type which would be returned by
 *            {@link Message#getField(Descriptors.FieldDescriptor)} for this field.
 * @return the int
 */
public static int computeElementSizeNoTag(final WireFormat.FieldType type, final Object value) {
    switch (type) {
        // Note: Minor violation of 80-char limit rule here because this would
        // actually be harder to read if we wrapped the lines.
        case DOUBLE:
            return CodedOutputStream.computeDoubleSizeNoTag((Double) value);
        case FLOAT:
            return CodedOutputStream.computeFloatSizeNoTag((Float) value);
        case INT64:
            return CodedOutputStream.computeInt64SizeNoTag((Long) value);
        case UINT64:
            return CodedOutputStream.computeUInt64SizeNoTag((Long) value);
        case INT32:
            return CodedOutputStream.computeInt32SizeNoTag((Integer) value);
        case FIXED64:
            return CodedOutputStream.computeFixed64SizeNoTag((Long) value);
        case FIXED32:
            return CodedOutputStream.computeFixed32SizeNoTag((Integer) value);
        case BOOL:
            return CodedOutputStream.computeBoolSizeNoTag((Boolean) value);
        case STRING:
            return CodedOutputStream.computeStringSizeNoTag((String) value);
        case GROUP:
            return CodedOutputStream.computeGroupSizeNoTag((MessageLite) value);
        case BYTES:
            if (value instanceof ByteString) {
                return CodedOutputStream.computeBytesSizeNoTag((ByteString) value);
            } else {
                if (value instanceof Byte[]) {
                    return computeLengthDelimitedFieldSize(((Byte[]) value).length);
                }
                return CodedOutputStream.computeByteArraySizeNoTag((byte[]) value);
            }
        case UINT32:
            return CodedOutputStream.computeUInt32SizeNoTag((Integer) value);
        case SFIXED32:
            return CodedOutputStream.computeSFixed32SizeNoTag((Integer) value);
        case SFIXED64:
            return CodedOutputStream.computeSFixed64SizeNoTag((Long) value);
        case SINT32:
            return CodedOutputStream.computeSInt32SizeNoTag((Integer) value);
        case SINT64:
            return CodedOutputStream.computeSInt64SizeNoTag((Long) value);

        case MESSAGE:
            if (value instanceof LazyField) {
                return CodedOutputStream.computeLazyFieldSizeNoTag((LazyField) value);
            } else {
                return computeObjectSizeNoTag(value);
            }

        case ENUM:
            if (value instanceof Internal.EnumLite) {
                return CodedOutputStream.computeEnumSizeNoTag(((Internal.EnumLite) value).getNumber());
            } else {
                if (value instanceof EnumReadable) {
                    return CodedOutputStream.computeEnumSizeNoTag(((EnumReadable) value).value());
                } else if (value instanceof Enum) {
                    return CodedOutputStream.computeEnumSizeNoTag(((Enum) value).ordinal());
                }

                return CodedOutputStream.computeEnumSizeNoTag((Integer) value);
            }
    }

    throw new RuntimeException("There is no way to get here, but the compiler thinks otherwise.");
}