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
   *
   *     https://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.avro.thrift;
  
  import java.io.IOException;
  import java.util.Set;
  import java.util.HashSet;
  
  import org.apache.avro.Schema;
  import org.apache.avro.AvroRuntimeException;
  import org.apache.avro.generic.GenericDatumReader;
  import org.apache.avro.specific.SpecificData;
  import org.apache.avro.io.Decoder;
  import org.apache.avro.util.ClassUtils;
  
  /**
   * {@link org.apache.avro.io.DatumReader DatumReader} for generated Thrift
   * classes.
   */
  public class ThriftDatumReader<T> extends GenericDatumReader<T> {
    public ThriftDatumReader() {
      this(null, null, ThriftData.get());
    }
  
    public ThriftDatumReader(Class<T> c) {
      this(ThriftData.get().getSchema(c));
    }
  
    /** Construct where the writer's and reader's schemas are the same. */
    public ThriftDatumReader(Schema schema) {
      this(schema, schema, ThriftData.get());
    }
  
    /** Construct given writer's and reader's schema. */
    public ThriftDatumReader(Schema writer, Schema reader) {
      this(writer, reader, ThriftData.get());
    }
  
    protected ThriftDatumReader(Schema writer, Schema reader, ThriftData data) {
      super(writer, reader, data);
    }
  
    @Override
    protected Object createEnum(String symbol, Schema schema) {
      try {
        Class c = ClassUtils.forName(SpecificData.getClassName(schema));
        if (c == null)
          return super.createEnum(symbol, schema); // punt to generic
        return Enum.valueOf(c, symbol);
      } catch (Exception e) {
        throw new AvroRuntimeException(e);
      }
    }
  
    @Override
    protected Object readInt(Object old, Schema s, Decoder in) throws IOException {
      String type = s.getProp(ThriftData.THRIFT_PROP);
      int value = in.readInt();
      if (type != null) {
        if ("byte".equals(type))
          return (byte) value;
        if ("short".equals(type))
          return (short) value;
      }
      return value;
    }
  
    @Override
    protected Object newArray(Object old, int size, Schema schema) {
      if ("set".equals(schema.getProp(ThriftData.THRIFT_PROP))) {
        if (old instanceof Set) {
          ((Set) old).clear();
          return old;
        }
        return new HashSet();
      } else {
        return super.newArray(old, size, schema);
      }
    }
  
  }
  