/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tajo.datum.protobuf;
import com.google.protobuf.ExtensionRegistry;
import com.google.protobuf.Message;
import com.google.protobuf.Message.Builder;
import com.google.protobuf.UnknownFieldSet;
import java.io.*;
import java.nio.charset.Charset;
public abstract class AbstractCharBasedFormatter extends ProtobufFormatter {
@Override
public void print(Message message, OutputStream output, Charset cs)
throws IOException {
OutputStreamWriter writer = new OutputStreamWriter(output, cs);
print(message, writer);
writer.flush();
}
abstract public void print(Message message, Appendable output) throws IOException;
@Override
public void print(UnknownFieldSet fields, OutputStream output, Charset cs)
throws IOException {
OutputStreamWriter writer = new OutputStreamWriter(output, cs);
print(fields, writer);
writer.flush();
}
abstract public void print(UnknownFieldSet fields, Appendable output) throws IOException;
@Override
public void merge(InputStream input, Charset cs,
ExtensionRegistry extensionRegistry, Builder builder) throws IOException {
InputStreamReader reader = new InputStreamReader(input, cs);
merge(reader, extensionRegistry, builder);
}
abstract public void merge(CharSequence input, ExtensionRegistry extensionRegistry,
Message.Builder builder) throws IOException;
/**
* Parse a text-format message from {@code input} and merge the contents into {@code builder}.
* Extensions will be recognized if they are registered in {@code extensionRegistry}.
*/
public void merge(Readable input,
ExtensionRegistry extensionRegistry,
Message.Builder builder) throws IOException {
// Read the entire input to a String then parse that.
// If StreamTokenizer were not quite so crippled, or if there were a kind
// of Reader that could read in chunks that match some particular regex,
// or if we wanted to write a custom Reader to tokenize our stream, then
// we would not have to read to one big String. Alas, none of these is
// the case. Oh well.
merge(TextUtils.toStringBuilder(input), extensionRegistry, builder);
}
}