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.optimizer.rules.pushdown.schema;
  
  import org.apache.hyracks.algebricks.core.algebra.base.ILogicalExpression;
  import org.apache.hyracks.algebricks.core.algebra.base.LogicalExpressionTag;
  import org.apache.hyracks.algebricks.core.algebra.expressions.AbstractFunctionCallExpression;
  import org.apache.hyracks.api.exceptions.SourceLocation;
  
  abstract class AbstractExpectedSchemaNode implements IExpectedSchemaNode {
      protected final AbstractFunctionCallExpression parentExpression;
      protected final ILogicalExpression expression;
      private AbstractComplexExpectedSchemaNode parent;
  
      AbstractExpectedSchemaNode(AbstractComplexExpectedSchemaNode parent,
              AbstractFunctionCallExpression parentExpression, ILogicalExpression expression) {
          this.parentExpression = parentExpression;
          this.expression = expression;
          this.parent = parent;
      }
  
      @Override
      public final AbstractComplexExpectedSchemaNode getParent() {
          return parent;
      }
  
      @Override
      public final SourceLocation getSourceLocation() {
          return expression.getSourceLocation();
      }
  
      @Override
      public final String getFunctionName() {
          if (expression.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
              return ((AbstractFunctionCallExpression) expression).getFunctionIdentifier().getName();
          }
          return null;
      }
  
      @Override
      public AbstractFunctionCallExpression getParentExpression() {
          return parentExpression;
      }
  
      @Override
      public ILogicalExpression getExpression() {
          return expression;
      }
  
      @Override
      public void setParent(AbstractComplexExpectedSchemaNode parent) {
          this.parent = parent;
      }
  }
  