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.lang.common.util;
  
  import static org.apache.asterix.om.base.temporal.ATimeParserFactory.parseTimePart;
  
  import java.io.DataOutput;
  import java.util.List;
  
  import org.apache.asterix.common.exceptions.CompilationException;
  import org.apache.asterix.common.exceptions.ErrorCode;
  import org.apache.asterix.common.exceptions.RuntimeDataException;
  import org.apache.asterix.formats.nontagged.BinaryComparatorFactoryProvider;
  import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
  import org.apache.asterix.lang.common.base.Expression;
  import org.apache.asterix.lang.common.base.Expression.Kind;
  import org.apache.asterix.lang.common.base.Literal;
  import org.apache.asterix.lang.common.expression.CallExpr;
  import org.apache.asterix.lang.common.expression.ListConstructor;
  import org.apache.asterix.lang.common.expression.LiteralExpr;
  import org.apache.asterix.lang.common.literal.DoubleLiteral;
  import org.apache.asterix.lang.common.literal.FloatLiteral;
  import org.apache.asterix.lang.common.literal.IntegerLiteral;
  import org.apache.asterix.lang.common.literal.LongIntegerLiteral;
  import org.apache.asterix.lang.common.literal.StringLiteral;
  import org.apache.asterix.om.base.AMutableDate;
  import org.apache.asterix.om.base.AMutableDateTime;
  import org.apache.asterix.om.base.AMutableDouble;
  import org.apache.asterix.om.base.AMutableFloat;
  import org.apache.asterix.om.base.AMutableInt32;
  import org.apache.asterix.om.base.AMutableInt64;
  import org.apache.asterix.om.base.AMutableString;
  import org.apache.asterix.om.base.AMutableTime;
  import org.apache.asterix.om.base.temporal.ADateParserFactory;
  import org.apache.asterix.om.base.temporal.ADateTimeParserFactory;
  import org.apache.asterix.om.base.temporal.ATimeParserFactory;
  import org.apache.asterix.om.functions.BuiltinFunctions;
  import org.apache.asterix.om.types.ATypeTag;
  import org.apache.asterix.om.types.BuiltinType;
  import org.apache.hyracks.algebricks.common.exceptions.NotImplementedException;
  import org.apache.hyracks.api.dataflow.value.IBinaryComparator;
  import org.apache.hyracks.api.dataflow.value.IBinaryComparatorFactory;
  import org.apache.hyracks.api.dataflow.value.ISerializerDeserializer;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.api.exceptions.HyracksException;
  import org.apache.hyracks.api.exceptions.SourceLocation;
  import org.apache.hyracks.data.std.util.ArrayBackedValueStorage;
  import org.apache.hyracks.dataflow.common.data.partition.range.RangeMap;
  
  public class RangeMapBuilder {
  
      private RangeMapBuilder() {
      }
  
      public static RangeMap parseHint(Expression expression) throws CompilationException {
          if (expression.getKind() != Kind.LIST_CONSTRUCTOR_EXPRESSION) {
              throw new CompilationException(ErrorCode.RANGE_MAP_ERROR, expression.getSourceLocation());
          }
  
          ArrayBackedValueStorage abvs = new ArrayBackedValueStorage();
          DataOutput out = abvs.getDataOutput();
  
          List<Expression> el = ((ListConstructor) expression).getExprList();
          int[] offsets = new int[el.size()];
  
          // Loop over list of literals
          for (int i = 0; i < el.size(); ++i) {
              Expression item = el.get(i);
              if (item.getKind() == Kind.LITERAL_EXPRESSION) {
                  parseLiteralToBytes((LiteralExpr) item, out);
                  offsets[i] = abvs.getLength();
              } else if (item.getKind() == Kind.CALL_EXPRESSION) {
                  parseExpressionToBytes((CallExpr) item, out);
                  offsets[i] = abvs.getLength();
              } else {
                  throw new CompilationException(ErrorCode.RANGE_MAP_ERROR, expression.getSourceLocation());
              }
              // TODO Add support for composite fields.
          }
  
          return new RangeMap(1, abvs.getByteArray(), offsets, null);
      }
  
      @SuppressWarnings("unchecked")
      private static void parseExpressionToBytes(CallExpr item, DataOutput out) throws CompilationException {
          AMutableDate aDate = new AMutableDate(0);
          AMutableTime aTime = new AMutableTime(0);
          AMutableDateTime aDateTime = new AMutableDateTime(0L);
          @SuppressWarnings("rawtypes")
          ISerializerDeserializer serde;
  
          //Check if Literal
          if (!(item.getExprList().get(0).getKind() == Kind.LITERAL_EXPRESSION)) {
              throw new CompilationException(ErrorCode.RANGE_MAP_ERROR, item.getSourceLocation());
          }
          LiteralExpr argumentLiteralExpr = (LiteralExpr) item.getExprList().get(0);
  
          //Make Sure Literal is String Type
          if (!(argumentLiteralExpr.getValue().getLiteralType() == Literal.Type.STRING)) {
              throw new CompilationException(ErrorCode.RANGE_MAP_ERROR, item.getSourceLocation());
          }
          String value = argumentLiteralExpr.getValue().toString();
  
          try {
              if (BuiltinFunctions.DATE_CONSTRUCTOR.getName().equals(item.getFunctionSignature().getName())) {
                  int chrononTimeInDays = ADateParserFactory.parseDatePartInDays(value, 0, value.length());
                  serde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ADATE);
                  aDate.setValue(chrononTimeInDays);
                  serde.serialize(aDate, out);
              } else if (BuiltinFunctions.TIME_CONSTRUCTOR.getName().equals(item.getFunctionSignature().getName())) {
                  int chrononTimeInMillis = ATimeParserFactory.parseTimePart(value, 0, value.length());
                  serde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ATIME);
                  aTime.setValue(chrononTimeInMillis);
                  serde.serialize(aTime, out);
              } else if (BuiltinFunctions.DATETIME_CONSTRUCTOR.getName().equals(item.getFunctionSignature().getName())) {
                  long chronoDatetimeInMills = ADateTimeParserFactory.parseDateTimePart(value, 0, value.length());
                  aDateTime.setValue(chronoDatetimeInMills);
                  serde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ADATETIME);
                  serde.serialize(aDateTime, out);
              } else {
                  throw new NotImplementedException("The range map builder has not been implemented for "
                          + item.getFunctionSignature().getName() + " type of expressions.");
              }
          } catch (HyracksException e) {
              throw new CompilationException(ErrorCode.RANGE_MAP_ERROR, e, item.getSourceLocation(), e.getMessage());
          }
      }
  
      @SuppressWarnings("unchecked")
      private static void parseLiteralToBytes(LiteralExpr item, DataOutput out) throws CompilationException {
          AMutableDouble aDouble = new AMutableDouble(0);
          AMutableFloat aFloat = new AMutableFloat(0);
          AMutableInt64 aInt64 = new AMutableInt64(0);
          AMutableInt32 aInt32 = new AMutableInt32(0);
          AMutableString aString = new AMutableString("");
          @SuppressWarnings("rawtypes")
          ISerializerDeserializer serde;
  
          Literal l = item.getValue();
          try {
              switch (l.getLiteralType()) {
                  case DOUBLE:
                      DoubleLiteral dl = (DoubleLiteral) l;
                      serde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ADOUBLE);
                      aDouble.setValue(dl.getValue());
                      serde.serialize(aDouble, out);
                      break;
                  case FLOAT:
                      FloatLiteral fl = (FloatLiteral) l;
                      serde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AFLOAT);
                      aFloat.setValue(fl.getValue());
                      serde.serialize(aFloat, out);
                      break;
                  case INTEGER:
                      IntegerLiteral il = (IntegerLiteral) l;
                      serde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT32);
                      aInt32.setValue(il.getValue());
                      serde.serialize(aInt32, out);
                      break;
                  case LONG:
                      LongIntegerLiteral lil = (LongIntegerLiteral) l;
                      serde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT64);
                      aInt64.setValue(lil.getValue());
                      serde.serialize(aInt64, out);
                      break;
                  case STRING:
                      StringLiteral sl = (StringLiteral) l;
                      serde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ASTRING);
                      aString.setValue(sl.getValue());
                      serde.serialize(aString, out);
                      break;
                  default:
                      throw new NotImplementedException("The range map builder has not been implemented for "
                              + item.getKind() + " type of expressions.");
              }
          } catch (HyracksDataException e) {
              throw new CompilationException(ErrorCode.RANGE_MAP_ERROR, e, item.getSourceLocation(), e.getMessage());
          }
      }
  
      public static void verifyRangeOrder(RangeMap rangeMap, boolean ascending, SourceLocation sourceLoc)
              throws CompilationException {
          // TODO Add support for composite fields.
          int fieldIndex = 0;
          int fieldType = rangeMap.getTag(0, 0);
          BinaryComparatorFactoryProvider comparatorFactory = BinaryComparatorFactoryProvider.INSTANCE;
          IBinaryComparatorFactory bcf;
          try {
              bcf = comparatorFactory.getBinaryComparatorFactory(ATypeTag.VALUE_TYPE_MAPPING[fieldType], ascending);
          } catch (RuntimeDataException e) {
              throw new CompilationException(ErrorCode.COMPILATION_ERROR, sourceLoc, e.getMessage());
          }
          IBinaryComparator comparator = bcf.createBinaryComparator();
          int c = 0;
          for (int split = 1; split < rangeMap.getSplitCount(); ++split) {
              if (fieldType != rangeMap.getTag(fieldIndex, split)) {
                  throw new CompilationException(ErrorCode.COMPILATION_ERROR, sourceLoc,
                          "Range field contains more than a single type of items (" + fieldType + " and "
                                  + rangeMap.getTag(fieldIndex, split) + ").");
              }
              int previousSplit = split - 1;
              try {
                  c = comparator.compare(rangeMap.getByteArray(), rangeMap.getStartOffset(fieldIndex, previousSplit),
                          rangeMap.getLength(fieldIndex, previousSplit), rangeMap.getByteArray(),
                          rangeMap.getStartOffset(fieldIndex, split), rangeMap.getLength(fieldIndex, split));
              } catch (HyracksDataException e) {
                  throw new CompilationException(ErrorCode.COMPILATION_ERROR, sourceLoc, e.getMessage());
              }
              if (c >= 0) {
                  throw new CompilationException(ErrorCode.COMPILATION_ERROR, sourceLoc,
                          "Range fields are not in sorted order.");
              }
          }
      }
  }
  