// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

package com.google.protobuf;

Parsers to discard unknown fields during parsing.
/** Parsers to discard unknown fields during parsing. */
public final class DiscardUnknownFieldsParser {
Wraps a given Parser into a new Parser that discards unknown fields during parsing.

Usage example:


private final static Parser<Foo> FOO_PARSER = DiscardUnknownFieldsParser.wrap(Foo.parser());
Foo parseFooDiscardUnknown(ByteBuffer input) throws IOException {
  return FOO_PARSER.parseFrom(input);
 }

Like all other implementations of Parser, this parser is stateless and thread-safe.

Params:
  • parser – The delegated parser that parses messages.
Returns:a Parser that will discard unknown fields during parsing.
/** * Wraps a given {@link Parser} into a new {@link Parser} that discards unknown fields during * parsing. * * <p>Usage example: * * <pre>{@code * private final static Parser<Foo> FOO_PARSER = DiscardUnknownFieldsParser.wrap(Foo.parser()); * Foo parseFooDiscardUnknown(ByteBuffer input) throws IOException { * return FOO_PARSER.parseFrom(input); * } * }</pre> * * <p>Like all other implementations of {@code Parser}, this parser is stateless and thread-safe. * * @param parser The delegated parser that parses messages. * @return a {@link Parser} that will discard unknown fields during parsing. */
public static final <T extends Message> Parser<T> wrap(final Parser<T> parser) { return new AbstractParser<T>() { @Override public T parsePartialFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry) throws InvalidProtocolBufferException { try { input.discardUnknownFields(); return parser.parsePartialFrom(input, extensionRegistry); } finally { input.unsetDiscardUnknownFields(); } } }; } private DiscardUnknownFieldsParser() {} }