content: /*
   * 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.beam.sdk.coders;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import org.apache.beam.sdk.values.TypeDescriptor;
  
  /**
   * A {@link Coder} that encodes {@code Integer Integers} as the ASCII bytes of their textual,
   * decimal, representation.
   */
  public class TextualIntegerCoder extends AtomicCoder<Integer> {
  
    public static TextualIntegerCoder of() {
      return new TextualIntegerCoder();
    }
  
    /////////////////////////////////////////////////////////////////////////////
  
    private static final TypeDescriptor<Integer> TYPE_DESCRIPTOR = new TypeDescriptor<Integer>() {};
  
    protected TextualIntegerCoder() {}
  
    @Override
    public void encode(Integer value, OutputStream outStream) throws IOException, CoderException {
      encode(value, outStream, Context.NESTED);
    }
  
    @Override
    public void encode(Integer value, OutputStream outStream, Context context)
        throws IOException, CoderException {
      if (value == null) {
        throw new CoderException("cannot encode a null Integer");
      }
      String textualValue = value.toString();
      StringUtf8Coder.of().encode(textualValue, outStream, context);
    }
  
    @Override
    public Integer decode(InputStream inStream) throws IOException, CoderException {
      return decode(inStream, Context.NESTED);
    }
  
    @Override
    public Integer decode(InputStream inStream, Context context) throws IOException, CoderException {
      String textualValue = StringUtf8Coder.of().decode(inStream, context);
      try {
        return Integer.valueOf(textualValue);
      } catch (NumberFormatException exn) {
        throw new CoderException("error when decoding a textual integer", exn);
      }
    }
  
    @Override
    public void verifyDeterministic() {
      StringUtf8Coder.of().verifyDeterministic();
    }
  
    @Override
    public TypeDescriptor<Integer> getEncodedTypeDescriptor() {
      return TYPE_DESCRIPTOR;
    }
  
    @Override
    protected long getEncodedElementByteSize(Integer value) throws Exception {
      if (value == null) {
        throw new CoderException("cannot encode a null Integer");
      }
      String textualValue = value.toString();
      return StringUtf8Coder.of().getEncodedElementByteSize(textualValue);
    }
  }
  