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.om.constants;
  
  import org.apache.asterix.om.base.ABoolean;
  import org.apache.asterix.om.base.AMissing;
  import org.apache.asterix.om.base.ANull;
  import org.apache.asterix.om.base.IAObject;
  import org.apache.hyracks.algebricks.core.algebra.expressions.ConstantExpression;
  import org.apache.hyracks.algebricks.core.algebra.expressions.IAlgebricksConstantValue;
  
  public class AsterixConstantValue implements IAlgebricksConstantValue {
  
      private final IAObject object;
  
      public AsterixConstantValue(IAObject object) {
          this.object = object;
      }
  
      @Override
      public boolean isFalse() {
          return object == ABoolean.FALSE;
      }
  
      @Override
      public boolean isMissing() {
          return object == AMissing.MISSING;
      }
  
      @Override
      public boolean isNull() {
          return object == ANull.NULL;
      }
  
      @Override
      public boolean isTrue() {
          return object == ABoolean.TRUE;
      }
  
      public IAObject getObject() {
          return object;
      }
  
      @Override
      public String toString() {
          return object.toString();
      }
  
      @Override
      public boolean equals(Object o) {
          if (o instanceof AsterixConstantValue) {
              AsterixConstantValue v2 = (AsterixConstantValue) o;
              return object.deepEqual(v2.getObject());
          } else if (o instanceof IAlgebricksConstantValue) {
              return o.equals(this);
          } else {
              return false;
          }
      }
  
      @Override
      public int hashCode() {
          switch (object.getType().getTypeTag()) {
              case MISSING:
                  return ConstantExpression.MISSING.hashCode();
              case NULL:
                  return ConstantExpression.NULL.hashCode();
              case BOOLEAN:
                  return (isTrue() ? ConstantExpression.TRUE : ConstantExpression.FALSE).hashCode();
              default:
                  return object.hash();
          }
      }
  }
  