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.geo.evaluators.functions;
  
  import java.io.DataInputStream;
  import java.io.DataOutput;
  
  import org.apache.asterix.dataflow.data.nontagged.serde.AGeometrySerializerDeserializer;
  import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
  import org.apache.asterix.om.base.AMutablePoint;
  import org.apache.asterix.om.base.AMutableRectangle;
  import org.apache.asterix.om.base.ARectangle;
  import org.apache.asterix.om.functions.BuiltinFunctions;
  import org.apache.asterix.om.functions.IFunctionDescriptor;
  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.om.types.hierachy.ATypeHierarchy;
  import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
  import org.apache.asterix.runtime.evaluators.functions.PointableHelper;
  import org.apache.asterix.runtime.exceptions.TypeMismatchException;
  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.VoidPointable;
  import org.apache.hyracks.data.std.util.ArrayBackedValueStorage;
  import org.apache.hyracks.data.std.util.ByteArrayAccessibleInputStream;
  import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
  import org.locationtech.jts.geom.Envelope;
  import org.locationtech.jts.geom.Geometry;
  import org.locationtech.jts.geom.GeometryFactory;
  
  public class STMBREnlargeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
  
      private static final long serialVersionUID = 1L;
  
      public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
          @Override
          public IFunctionDescriptor createFunctionDescriptor() {
              return new STMBREnlargeDescriptor();
          }
      };
  
      private final GeometryFactory geometryFactory;
  
      public STMBREnlargeDescriptor() {
          geometryFactory = new GeometryFactory();
      }
  
      @Override
      public FunctionIdentifier getIdentifier() {
          return BuiltinFunctions.ST_MBR_ENLARGE;
      }
  
      @Override
      public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
          return new IScalarEvaluatorFactory() {
              private static final long serialVersionUID = 1L;
  
              @Override
              public IScalarEvaluator createScalarEvaluator(IEvaluatorContext ctx) throws HyracksDataException {
                  return new IScalarEvaluator() {
                      private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
                      private DataOutput out = resultStorage.getDataOutput();
                      private IPointable inputArg0 = new VoidPointable();
                      private IPointable inputArg1 = new VoidPointable();
                      private IScalarEvaluator eval0 = args[0].createScalarEvaluator(ctx);
                      private IScalarEvaluator eval1 = args[1].createScalarEvaluator(ctx);
                      private ByteArrayAccessibleInputStream inStream =
                              new ByteArrayAccessibleInputStream(new byte[0], 0, 0);
                      private DataInputStream dataIn = new DataInputStream(inStream);
  
                      Envelope env = new Envelope();
  
                      @SuppressWarnings("unchecked")
                      private final ISerializerDeserializer<ARectangle> rectangleSerde =
                              SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ARECTANGLE);
  
                      @Override
                      public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
                          resultStorage.reset();
  
                          eval0.evaluate(tuple, inputArg0);
                          eval1.evaluate(tuple, inputArg1);
  
                          if (PointableHelper.checkAndSetMissingOrNull(result, inputArg0, inputArg1)) {
                              return;
                          }
  
                          byte[] data0 = inputArg0.getByteArray();
                          int offset0 = inputArg0.getStartOffset();
                          int len = inputArg0.getLength();
  
                          byte[] data1 = inputArg1.getByteArray();
                          int offset1 = inputArg1.getStartOffset();
  
                          if (data0[offset0] != ATypeTag.SERIALIZED_GEOMETRY_TYPE_TAG) {
                              throw new TypeMismatchException(sourceLoc, getIdentifier(), 0, data0[offset0],
                                      ATypeTag.SERIALIZED_GEOMETRY_TYPE_TAG);
                          }
  
                          inStream.setContent(data0, offset0 + 1, len - 1);
                          Geometry geometry = AGeometrySerializerDeserializer.INSTANCE.deserialize(dataIn).getGeometry();
                          Envelope env = geometry.getEnvelopeInternal();
                          double expandValue =
                                  ATypeHierarchy.getDoubleValue(getIdentifier().getName(), 0, data1, offset1);
                          AMutableRectangle expandedMBR = new AMutableRectangle(
                                  new AMutablePoint(env.getMinX() - expandValue, env.getMinY() - expandValue),
                                  new AMutablePoint(env.getMaxX() + expandValue, env.getMaxY() + expandValue));
                          rectangleSerde.serialize(expandedMBR, out);
                          result.set(resultStorage);
                      }
                  };
              }
          };
      }
  }
  