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.asterix.runtime.evaluators.functions.binary;
  
  import org.apache.asterix.common.annotations.MissingNullInOutFunction;
  import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
  import org.apache.asterix.om.base.ABinary;
  import org.apache.asterix.om.base.AMutableBinary;
  import org.apache.asterix.om.functions.BuiltinFunctions;
  import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
  import org.apache.asterix.om.types.ATypeTag;
  import org.apache.asterix.om.types.BuiltinType;
  import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
  import org.apache.asterix.runtime.evaluators.functions.PointableHelper;
  import org.apache.asterix.runtime.exceptions.UnsupportedItemTypeException;
  import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
  import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator;
  import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
  import org.apache.hyracks.api.context.IEvaluatorContext;
  import org.apache.hyracks.api.dataflow.value.ISerializerDeserializer;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.data.std.api.IPointable;
  import org.apache.hyracks.data.std.primitive.UTF8StringPointable;
  import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
  import org.apache.hyracks.util.bytes.Base64Parser;
  import org.apache.hyracks.util.bytes.HexParser;
  
  @MissingNullInOutFunction
  public class ParseBinaryDescriptor extends AbstractScalarFunctionDynamicDescriptor {
      private static final long serialVersionUID = 1L;
      private static final UTF8StringPointable HEX_FORMAT = UTF8StringPointable.generateUTF8Pointable("hex");
      private static final UTF8StringPointable BASE64_FORMAT = UTF8StringPointable.generateUTF8Pointable("base64");
  
      public final static IFunctionDescriptorFactory FACTORY = ParseBinaryDescriptor::new;
  
      public static final ATypeTag[] EXPECTED_INPUT_TAGS = { ATypeTag.STRING, ATypeTag.STRING };
  
      @Override
      public FunctionIdentifier getIdentifier() {
          return BuiltinFunctions.PARSE_BINARY;
      }
  
      @Override
      public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
          return new IScalarEvaluatorFactory() {
              private static final long serialVersionUID = 1L;
  
              @Override
              public IScalarEvaluator createScalarEvaluator(final IEvaluatorContext ctx) throws HyracksDataException {
                  return new AbstractBinaryScalarEvaluator(ctx, args, getIdentifier(), sourceLoc) {
  
                      @SuppressWarnings("unchecked")
                      private ISerializerDeserializer<ABinary> binarySerde =
                              SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ABINARY);
  
                      private AMutableBinary aBinary = new AMutableBinary(new byte[0], 0, 0);
                      private final UTF8StringPointable stringPointable = new UTF8StringPointable();
                      private final UTF8StringPointable formatPointable = new UTF8StringPointable();
  
                      private final HexParser hexParser = new HexParser();
                      private final Base64Parser base64Parser = new Base64Parser();
  
                      @Override
                      public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
                          resultStorage.reset();
                          evaluators[0].evaluate(tuple, pointables[0]);
                          evaluators[1].evaluate(tuple, pointables[1]);
  
                          if (PointableHelper.checkAndSetMissingOrNull(result, pointables[0], pointables[1])) {
                              return;
                          }
  
                          ATypeTag binaryTag = ATypeTag.VALUE_TYPE_MAPPING[pointables[0].getByteArray()[pointables[0]
                                  .getStartOffset()]];
  
                          ATypeTag formatTag = ATypeTag.VALUE_TYPE_MAPPING[pointables[1].getByteArray()[pointables[1]
                                  .getStartOffset()]];
                          checkTypeMachingThrowsIfNot(EXPECTED_INPUT_TAGS, binaryTag, formatTag);
                          stringPointable.set(pointables[0].getByteArray(), pointables[0].getStartOffset() + 1,
                                  pointables[0].getLength());
                          formatPointable.set(pointables[1].getByteArray(), pointables[1].getStartOffset() + 1,
                                  pointables[1].getLength());
                          if (HEX_FORMAT.ignoreCaseCompareTo(formatPointable) == 0) {
                              hexParser.generateByteArrayFromHexString(stringPointable.getByteArray(),
                                      stringPointable.getCharStartOffset(), stringPointable.getUTF8Length());
  
                              aBinary.setValue(hexParser.getByteArray(), 0, hexParser.getLength());
                          } else if (BASE64_FORMAT.ignoreCaseCompareTo(formatPointable) == 0) {
                              base64Parser.generatePureByteArrayFromBase64String(stringPointable.getByteArray(),
                                      stringPointable.getCharStartOffset(), stringPointable.getUTF8Length());
  
                              aBinary.setValue(base64Parser.getByteArray(), 0, base64Parser.getLength());
                          } else {
                              throw new UnsupportedItemTypeException(sourceLoc, getIdentifier(), formatTag.serialize());
                          }
                          binarySerde.serialize(aBinary, dataOutput);
                          result.set(resultStorage);
                      }
                  };
  
              }
  
          };
      }
  
  }
  