Package com.google.protobuf

Class TextFormat

java.lang.Object

com.google.protobuf.TextFormat

public final class TextFormat
extends java.lang.Object

Provide text parsing and formatting support for proto2 instances. The implementation largely follows text_format.cc.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TextFormat.InvalidEscapeSequenceException	Thrown by unescapeBytes(java.lang.CharSequence) and unescapeText(java.lang.String) when an invalid escape sequence is seen.
static class	TextFormat.ParseException	Thrown when parsing an invalid text format message.
static class	TextFormat.Parser	Parser for text-format proto2 instances.
static class	TextFormat.Printer	Helper class for converting protobufs to text.
static class	TextFormat.UnknownFieldParseException	Thrown when encountering an unknown field while parsing a text format message.

Method Summary

Modifier and Type	Method	Description
static java.lang.String	escapeBytes(byte[] input)	Like escapeBytes(ByteString), but used for byte array.
static java.lang.String	escapeBytes(ByteString input)	Escapes bytes in the format used in protocol buffer text format, which is the same as the format used for C string literals.
static java.lang.String	escapeDoubleQuotesAndBackslashes(java.lang.String input)	Escape double quotes and backslashes in a String for emittingUnicode output of a message.
static TextFormat.Parser	getParser()	Return a TextFormat.Parser instance which can parse text-format messages.
static void	merge(java.lang.CharSequence input, ExtensionRegistry extensionRegistry, Message.Builder builder)	Parse a text-format message from input and merge the contents into builder.
static void	merge(java.lang.CharSequence input, Message.Builder builder)	Parse a text-format message from input and merge the contents into builder.
static void	merge(java.lang.Readable input, ExtensionRegistry extensionRegistry, Message.Builder builder)	Parse a text-format message from input and merge the contents into builder.
static void	merge(java.lang.Readable input, Message.Builder builder)	Parse a text-format message from input and merge the contents into builder.
static <T extends Message> T	parse(java.lang.CharSequence input, ExtensionRegistry extensionRegistry, java.lang.Class<T> protoClass)	Parse a text-format message from input.
static <T extends Message> T	parse(java.lang.CharSequence input, java.lang.Class<T> protoClass)	Parse a text-format message from input.
static TextFormat.Printer	printer()	Printer instance which escapes non-ASCII characters.
static void	printUnknownFieldValue(int tag, java.lang.Object value, java.lang.Appendable output)	Outputs a textual representation of the value of an unknown field.
static java.lang.String	shortDebugString(MessageOrBuilder message)	Generates a human readable form of this message, useful for debugging and other purposes, with no newline characters.
static ByteString	unescapeBytes(java.lang.CharSequence charString)	Un-escape a byte sequence as escaped using escapeBytes(ByteString).
static java.lang.String	unsignedToString(int value)	Convert an unsigned 32-bit integer to a string.
static java.lang.String	unsignedToString(long value)	Convert an unsigned 64-bit integer to a string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

shortDebugString

public static java.lang.String shortDebugString(MessageOrBuilder message)

Generates a human readable form of this message, useful for debugging and other purposes, with no newline characters. This is just a trivial wrapper around TextFormat.Printer.shortDebugString(MessageOrBuilder).

printUnknownFieldValue

public static void printUnknownFieldValue(int tag,
                                          java.lang.Object value,
                                          java.lang.Appendable output)
                                   throws java.io.IOException

Outputs a textual representation of the value of an unknown field.

Parameters:

tag - the field's tag number

value - the value of the field

output - the output to which to append the formatted value

Throws:

java.lang.ClassCastException - if the value is not appropriate for the given field descriptor

java.io.IOException - if there is an exception writing to the output

printer

public static TextFormat.Printer printer()

Printer instance which escapes non-ASCII characters.

unsignedToString

public static java.lang.String unsignedToString(int value)

Convert an unsigned 32-bit integer to a string.

unsignedToString

public static java.lang.String unsignedToString(long value)

Convert an unsigned 64-bit integer to a string.

getParser

public static TextFormat.Parser getParser()

Return a TextFormat.Parser instance which can parse text-format messages. The returned instance is thread-safe.

merge

public static void merge(java.lang.Readable input,
                         Message.Builder builder)
                  throws java.io.IOException

Parse a text-format message from input and merge the contents into builder.

Throws:

java.io.IOException

merge

public static void merge(java.lang.CharSequence input,
                         Message.Builder builder)
                  throws TextFormat.ParseException

Parse a text-format message from input and merge the contents into builder.

Throws:

TextFormat.ParseException

parse

public static <T extends Message> T parse(java.lang.CharSequence input,
                                          java.lang.Class<T> protoClass)
                                   throws TextFormat.ParseException

Parse a text-format message from input.

Returns:

the parsed message, guaranteed initialized

Throws:

TextFormat.ParseException

merge

public static void merge(java.lang.Readable input,
                         ExtensionRegistry extensionRegistry,
                         Message.Builder builder)
                  throws java.io.IOException

Parse a text-format message from input and merge the contents into builder. Extensions will be recognized if they are registered in extensionRegistry.

Throws:

java.io.IOException

merge

public static void merge(java.lang.CharSequence input,
                         ExtensionRegistry extensionRegistry,
                         Message.Builder builder)
                  throws TextFormat.ParseException

Parse a text-format message from input and merge the contents into builder. Extensions will be recognized if they are registered in extensionRegistry.

Throws:

TextFormat.ParseException

parse

public static <T extends Message> T parse(java.lang.CharSequence input,
                                          ExtensionRegistry extensionRegistry,
                                          java.lang.Class<T> protoClass)
                                   throws TextFormat.ParseException

Parse a text-format message from input. Extensions will be recognized if they are registered in extensionRegistry.

Returns:

the parsed message, guaranteed initialized

Throws:

TextFormat.ParseException

escapeBytes

public static java.lang.String escapeBytes(ByteString input)

Escapes bytes in the format used in protocol buffer text format, which is the same as the format used for C string literals. All bytes that are not printable 7-bit ASCII characters are escaped, as well as backslash, single-quote, and double-quote characters. Characters for which no defined short-hand escape sequence is defined will be escaped using 3-digit octal sequences.

escapeBytes

public static java.lang.String escapeBytes(byte[] input)

Like escapeBytes(ByteString), but used for byte array.

unescapeBytes

public static ByteString unescapeBytes(java.lang.CharSequence charString)
                                throws TextFormat.InvalidEscapeSequenceException

Un-escape a byte sequence as escaped using escapeBytes(ByteString). Two-digit hex escapes (starting with "\x") are also recognized.

Throws:

TextFormat.InvalidEscapeSequenceException

escapeDoubleQuotesAndBackslashes

public static java.lang.String escapeDoubleQuotesAndBackslashes(java.lang.String input)

Escape double quotes and backslashes in a String for emittingUnicode output of a message.