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Diffstat (limited to 'java/src/main/java/com/google/protobuf/AbstractParser.java')
-rw-r--r-- | java/src/main/java/com/google/protobuf/AbstractParser.java | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/java/src/main/java/com/google/protobuf/AbstractParser.java b/java/src/main/java/com/google/protobuf/AbstractParser.java new file mode 100644 index 00000000..66b0ee3b --- /dev/null +++ b/java/src/main/java/com/google/protobuf/AbstractParser.java @@ -0,0 +1,258 @@ +// 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; + +import com.google.protobuf.AbstractMessageLite.Builder.LimitedInputStream; + +import java.io.IOException; +import java.io.InputStream; + +/** + * A partial implementation of the {@link Parser} interface which implements + * as many methods of that interface as possible in terms of other methods. + * + * Note: This class implements all the convenience methods in the + * {@link Parser} interface. See {@link Parser} for related javadocs. + * Subclasses need to implement + * {@link Parser#parsePartialFrom(CodedInputStream, ExtensionRegistryLite)} + * + * @author liujisi@google.com (Pherl Liu) + */ +public abstract class AbstractParser<MessageType extends MessageLite> + implements Parser<MessageType> { + /** + * Creates an UninitializedMessageException for MessageType. + */ + private UninitializedMessageException + newUninitializedMessageException(MessageType message) { + if (message instanceof AbstractMessageLite) { + return ((AbstractMessageLite) message).newUninitializedMessageException(); + } + return new UninitializedMessageException(message); + } + + /** + * Helper method to check if message is initialized. + * + * @throws InvalidProtocolBufferException if it is not initialized. + * @return The message to check. + */ + private MessageType checkMessageInitialized(MessageType message) + throws InvalidProtocolBufferException { + if (message != null && !message.isInitialized()) { + throw newUninitializedMessageException(message) + .asInvalidProtocolBufferException() + .setUnfinishedMessage(message); + } + return message; + } + + private static final ExtensionRegistryLite EMPTY_REGISTRY + = ExtensionRegistryLite.getEmptyRegistry(); + + @Override + public MessageType parsePartialFrom(CodedInputStream input) + throws InvalidProtocolBufferException { + return parsePartialFrom(input, EMPTY_REGISTRY); + } + + @Override + public MessageType parseFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + return checkMessageInitialized( + parsePartialFrom(input, extensionRegistry)); + } + + @Override + public MessageType parseFrom(CodedInputStream input) throws InvalidProtocolBufferException { + return parseFrom(input, EMPTY_REGISTRY); + } + + @Override + public MessageType parsePartialFrom(ByteString data, ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + MessageType message; + try { + CodedInputStream input = data.newCodedInput(); + message = parsePartialFrom(input, extensionRegistry); + try { + input.checkLastTagWas(0); + } catch (InvalidProtocolBufferException e) { + throw e.setUnfinishedMessage(message); + } + return message; + } catch (InvalidProtocolBufferException e) { + throw e; + } + } + + @Override + public MessageType parsePartialFrom(ByteString data) throws InvalidProtocolBufferException { + return parsePartialFrom(data, EMPTY_REGISTRY); + } + + @Override + public MessageType parseFrom(ByteString data, ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + return checkMessageInitialized(parsePartialFrom(data, extensionRegistry)); + } + + @Override + public MessageType parseFrom(ByteString data) throws InvalidProtocolBufferException { + return parseFrom(data, EMPTY_REGISTRY); + } + + @Override + public MessageType parsePartialFrom( + byte[] data, int off, int len, ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + try { + CodedInputStream input = CodedInputStream.newInstance(data, off, len); + MessageType message = parsePartialFrom(input, extensionRegistry); + try { + input.checkLastTagWas(0); + } catch (InvalidProtocolBufferException e) { + throw e.setUnfinishedMessage(message); + } + return message; + } catch (InvalidProtocolBufferException e) { + throw e; + } + } + + @Override + public MessageType parsePartialFrom(byte[] data, int off, int len) + throws InvalidProtocolBufferException { + return parsePartialFrom(data, off, len, EMPTY_REGISTRY); + } + + @Override + public MessageType parsePartialFrom(byte[] data, ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + return parsePartialFrom(data, 0, data.length, extensionRegistry); + } + + @Override + public MessageType parsePartialFrom(byte[] data) throws InvalidProtocolBufferException { + return parsePartialFrom(data, 0, data.length, EMPTY_REGISTRY); + } + + @Override + public MessageType parseFrom( + byte[] data, int off, int len, ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + return checkMessageInitialized( + parsePartialFrom(data, off, len, extensionRegistry)); + } + + @Override + public MessageType parseFrom(byte[] data, int off, int len) + throws InvalidProtocolBufferException { + return parseFrom(data, off, len, EMPTY_REGISTRY); + } + + @Override + public MessageType parseFrom(byte[] data, ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + return parseFrom(data, 0, data.length, extensionRegistry); + } + + @Override + public MessageType parseFrom(byte[] data) throws InvalidProtocolBufferException { + return parseFrom(data, EMPTY_REGISTRY); + } + + @Override + public MessageType parsePartialFrom(InputStream input, ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + CodedInputStream codedInput = CodedInputStream.newInstance(input); + MessageType message = parsePartialFrom(codedInput, extensionRegistry); + try { + codedInput.checkLastTagWas(0); + } catch (InvalidProtocolBufferException e) { + throw e.setUnfinishedMessage(message); + } + return message; + } + + @Override + public MessageType parsePartialFrom(InputStream input) throws InvalidProtocolBufferException { + return parsePartialFrom(input, EMPTY_REGISTRY); + } + + @Override + public MessageType parseFrom(InputStream input, ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + return checkMessageInitialized( + parsePartialFrom(input, extensionRegistry)); + } + + @Override + public MessageType parseFrom(InputStream input) throws InvalidProtocolBufferException { + return parseFrom(input, EMPTY_REGISTRY); + } + + @Override + public MessageType parsePartialDelimitedFrom( + InputStream input, ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + int size; + try { + int firstByte = input.read(); + if (firstByte == -1) { + return null; + } + size = CodedInputStream.readRawVarint32(firstByte, input); + } catch (IOException e) { + throw new InvalidProtocolBufferException(e.getMessage()); + } + InputStream limitedInput = new LimitedInputStream(input, size); + return parsePartialFrom(limitedInput, extensionRegistry); + } + + @Override + public MessageType parsePartialDelimitedFrom(InputStream input) + throws InvalidProtocolBufferException { + return parsePartialDelimitedFrom(input, EMPTY_REGISTRY); + } + + @Override + public MessageType parseDelimitedFrom(InputStream input, ExtensionRegistryLite extensionRegistry) + throws InvalidProtocolBufferException { + return checkMessageInitialized( + parsePartialDelimitedFrom(input, extensionRegistry)); + } + + @Override + public MessageType parseDelimitedFrom(InputStream input) throws InvalidProtocolBufferException { + return parseDelimitedFrom(input, EMPTY_REGISTRY); + } +} |