com.google.protobuf.CodedOutputStream# computeFloatSizeNoTag ( ) 源码实例Demo

/**
 * get object size by {@link FieldType}.
 *
 * @param order the order
 * @param o the o
 * @param type the type
 * @param list the list
 * @param debug the debug
 * @param path the path
 * @return the int
 */
public static int computeSize(int order, Object o, FieldType type, boolean list, boolean debug, File path) {
    int size = 0;
    if (o == null) {
        return size;
    }

    if (type == FieldType.OBJECT) {
        Class cls = o.getClass();
        Codec target = ProtobufProxy.create(cls, debug, path);
        try {
            size = target.size(o);
            size = size + CodedOutputStream.computeRawVarint32Size(size);
            return size + CodedOutputStream.computeTagSize(order);
        } catch (IOException e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }

    if (type == FieldType.STRING) {
        size = CodedOutputStream.computeStringSizeNoTag(String.valueOf(o));
    } else if (type == FieldType.BOOL) {
        size = CodedOutputStream.computeBoolSizeNoTag(Boolean.valueOf(String.valueOf(o)));
    } else if (type == FieldType.BYTES) {
        byte[] bb = (byte[]) o;
        size = CodedOutputStream.computeBytesSizeNoTag(ByteString.copyFrom(bb));
    } else if (type == FieldType.DOUBLE) {
        size = CodedOutputStream.computeDoubleSizeNoTag(Double.valueOf(o.toString()));
    } else if (type == FieldType.FIXED32 || type == FieldType.INT32 || type == FieldType.SFIXED32
            || type == FieldType.SINT32 || type == FieldType.UINT32) {
        size = CodedOutputStream.computeInt32SizeNoTag(Integer.valueOf(o.toString()));
    } else if (type == FieldType.FIXED64 || type == FieldType.INT64 || type == FieldType.SFIXED64
            || type == FieldType.SINT64 || type == FieldType.UINT64) {
        size = CodedOutputStream.computeInt64SizeNoTag(Long.valueOf(o.toString()));
    } else if (type == FieldType.FLOAT) {
        size = CodedOutputStream.computeFloatSizeNoTag(Float.valueOf(o.toString()));
    } else if (type == FieldType.ENUM) {
        if (o instanceof EnumReadable) {
            size = CodedOutputStream.computeInt32SizeNoTag(((EnumReadable) o).value());
        } else if (o instanceof Enum) {
            size = CodedOutputStream.computeInt32SizeNoTag(((Enum) o).ordinal());
        }
    }

    return size;
}
 

/**
 * 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.");
}
 

/**
 * get object size by {@link FieldType}
 * 
 * @param o
 * @param type
 * @return
 */
public static int computeSize(int order, Object o, FieldType type, boolean list, boolean debug, File path) {
    int size = 0;
    if (o == null) {
        return size;
    }

    if (type == FieldType.OBJECT) {
        Class cls = o.getClass();
        Codec target = ProtobufProxy.create(cls);
        try {
            size = target.size(o);
            size = size + CodedOutputStream.computeRawVarint32Size(size);
            return size + CodedOutputStream.computeTagSize(order);
        } catch (IOException e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }

    if (type == FieldType.STRING) {
        size = CodedOutputStream.computeStringSizeNoTag(String.valueOf(o));
    } else if (type == FieldType.BOOL) {
        size = CodedOutputStream.computeBoolSizeNoTag(Boolean.valueOf(String.valueOf(o)));
    } else if (type == FieldType.BYTES) {
        byte[] bb = (byte[]) o;
        size = CodedOutputStream.computeBytesSizeNoTag(ByteString.copyFrom(bb));
    } else if (type == FieldType.DOUBLE) {
        size = CodedOutputStream.computeDoubleSizeNoTag(Double.valueOf(o.toString()));
    } else if (type == FieldType.FIXED32 || type == FieldType.INT32 || type == FieldType.SFIXED32
            || type == FieldType.SINT32 || type == FieldType.UINT32) {
        size = CodedOutputStream.computeInt32SizeNoTag(Integer.valueOf(o.toString()));
    } else if (type == FieldType.FIXED64 || type == FieldType.INT64 || type == FieldType.SFIXED64
            || type == FieldType.SINT64 || type == FieldType.UINT64) {
        size = CodedOutputStream.computeInt64SizeNoTag(Long.valueOf(o.toString()));
    } else if (type == FieldType.FLOAT) {
        size = CodedOutputStream.computeFloatSizeNoTag(Float.valueOf(o.toString()));
    } else if (type == FieldType.ENUM) {
        if (o instanceof EnumReadable) {
            size = CodedOutputStream.computeInt32SizeNoTag(((EnumReadable) o).value());
        } else if (o instanceof Enum) {
            size = CodedOutputStream.computeInt32SizeNoTag(((Enum) o).ordinal());
        }
    }

    return size;
}