Package com.google.protobuf

Class TextFormat

java.lang.Object

com.google.protobuf.TextFormat

public final class TextFormat
extends 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 final class	TextFormat.Printer	Helper class for converting protobufs to text.
static class	TextFormat.UnknownFieldParseException	Deprecated. This exception is unused and will be removed in the next breaking release (v5.x.x).

Method Summary

Modifier and Type	Method	Description
static TextFormat.Printer	debugFormatPrinter()	Printer instance which escapes non-ASCII characters and prints in the debug format.
static String	escapeBytes(byte[] input)	Like escapeBytes(ByteString), but used for byte array.
static 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 String	escapeDoubleQuotesAndBackslashes(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(CharSequence input, ExtensionRegistry extensionRegistry, Message.Builder builder)	Parse a text-format message from input and merge the contents into builder.
static void	merge(CharSequence input, Message.Builder builder)	Parse a text-format message from input and merge the contents into builder.
static void	merge(Readable input, ExtensionRegistry extensionRegistry, Message.Builder builder)	Parse a text-format message from input and merge the contents into builder.
static void	merge(Readable input, Message.Builder builder)	Parse a text-format message from input and merge the contents into builder.
static <T extends Message> T	parse(CharSequence input, ExtensionRegistry extensionRegistry, Class<T> protoClass)	Parse a text-format message from input.
static <T extends Message> T	parse(CharSequence input, 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, Object value, Appendable output)	Outputs a textual representation of the value of an unknown field.
static String	shortDebugString(MessageOrBuilder message)	Deprecated. Use printer().emittingSingleLine(true).printToString(MessageOrBuilder)
static ByteString	unescapeBytes(CharSequence charString)	Un-escape a byte sequence as escaped using escapeBytes(ByteString).
static String	unsignedToString(int value)	Convert an unsigned 32-bit integer to a string.
static 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 Details

shortDebugString

@Deprecated
public static String shortDebugString(MessageOrBuilder message)

Deprecated.

Use printer().emittingSingleLine(true).printToString(MessageOrBuilder)

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,
 Object value,
 Appendable output)
                                   throws 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:

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

IOException - if there is an exception writing to the output

printer

public static TextFormat.Printer printer()

Printer instance which escapes non-ASCII characters.

debugFormatPrinter

public static TextFormat.Printer debugFormatPrinter()

Printer instance which escapes non-ASCII characters and prints in the debug format.

unsignedToString

public static String unsignedToString(int value)

Convert an unsigned 32-bit integer to a string.

unsignedToString

public static 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(Readable input,
 Message.Builder builder)
                  throws IOException

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

Throws:

IOException

merge

public static void merge(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(CharSequence input,
 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(Readable input,
 ExtensionRegistry extensionRegistry,
 Message.Builder builder)
                  throws 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:

IOException

merge

public static void merge(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(CharSequence input,
 ExtensionRegistry extensionRegistry,
 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 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 String escapeBytes(byte[] input)

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

unescapeBytes

public static ByteString unescapeBytes(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 String escapeDoubleQuotesAndBackslashes(String input)

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